JP2004359802A - Dispersion composition and recording material - Google Patents
Dispersion composition and recording material Download PDFInfo
- Publication number
- JP2004359802A JP2004359802A JP2003159320A JP2003159320A JP2004359802A JP 2004359802 A JP2004359802 A JP 2004359802A JP 2003159320 A JP2003159320 A JP 2003159320A JP 2003159320 A JP2003159320 A JP 2003159320A JP 2004359802 A JP2004359802 A JP 2004359802A
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- JP
- Japan
- Prior art keywords
- dispersion
- residue
- compound
- dispersion composition
- whiteness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000006185 dispersion Substances 0.000 title claims abstract description 265
- 239000000203 mixture Substances 0.000 title claims abstract description 132
- 239000000463 material Substances 0.000 title claims abstract description 40
- -1 urea-urethane compound Chemical class 0.000 claims abstract description 135
- 239000002243 precursor Substances 0.000 claims abstract description 38
- 239000002253 acid Substances 0.000 claims abstract description 17
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 17
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 15
- 125000000129 anionic group Chemical group 0.000 claims abstract description 8
- 229920002678 cellulose Polymers 0.000 claims abstract description 8
- 239000001913 cellulose Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 40
- 150000002391 heterocyclic compounds Chemical group 0.000 claims description 17
- 150000001491 aromatic compounds Chemical group 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 150000007824 aliphatic compounds Chemical group 0.000 claims description 15
- 125000001424 substituent group Chemical group 0.000 claims description 15
- 238000004040 coloring Methods 0.000 claims description 13
- 239000004094 surface-active agent Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- OYQYHJRSHHYEIG-UHFFFAOYSA-N ethyl carbamate;urea Chemical class NC(N)=O.CCOC(N)=O OYQYHJRSHHYEIG-UHFFFAOYSA-N 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 6
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims description 5
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- 239000002280 amphoteric surfactant Substances 0.000 claims description 4
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 4
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- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 239000000975 dye Substances 0.000 abstract description 46
- 239000002270 dispersing agent Substances 0.000 abstract description 36
- 230000009467 reduction Effects 0.000 abstract description 2
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- 230000002378 acidificating effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
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- 239000007983 Tris buffer Substances 0.000 description 8
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 8
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 7
- 239000001273 butane Substances 0.000 description 7
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 7
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 150000002513 isocyanates Chemical class 0.000 description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 229910052751 metal Chemical class 0.000 description 5
- 239000002184 metal Chemical class 0.000 description 5
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- 150000002989 phenols Chemical class 0.000 description 5
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- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 3
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Natural products O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229920000609 methyl cellulose Polymers 0.000 description 3
- 239000001923 methylcellulose Substances 0.000 description 3
- 235000010981 methylcellulose Nutrition 0.000 description 3
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- 229960004889 salicylic acid Drugs 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- XAAILNNJDMIMON-UHFFFAOYSA-N 2'-anilino-6'-(dibutylamino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C(N(CCCC)CCCC)=CC=C(C2(C3=CC=CC=C3C(=O)O2)C2=C3)C=1OC2=CC(C)=C3NC1=CC=CC=C1 XAAILNNJDMIMON-UHFFFAOYSA-N 0.000 description 2
- SHHQYIMTQGDRHS-UHFFFAOYSA-N 2'-anilino-6'-(dipentylamino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C(N(CCCCC)CCCCC)=CC=C(C2(C3=CC=CC=C3C(=O)O2)C2=C3)C=1OC2=CC(C)=C3NC1=CC=CC=C1 SHHQYIMTQGDRHS-UHFFFAOYSA-N 0.000 description 2
- IXHBSOXJLNEOPY-UHFFFAOYSA-N 2'-anilino-6'-(n-ethyl-4-methylanilino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C=C(C2(C3=CC=CC=C3C(=O)O2)C2=CC(NC=3C=CC=CC=3)=C(C)C=C2O2)C2=CC=1N(CC)C1=CC=C(C)C=C1 IXHBSOXJLNEOPY-UHFFFAOYSA-N 0.000 description 2
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 2
- MOZDKDIOPSPTBH-UHFFFAOYSA-N Benzyl parahydroxybenzoate Chemical compound C1=CC(O)=CC=C1C(=O)OCC1=CC=CC=C1 MOZDKDIOPSPTBH-UHFFFAOYSA-N 0.000 description 2
- ZCTQGTTXIYCGGC-UHFFFAOYSA-N Benzyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OCC1=CC=CC=C1 ZCTQGTTXIYCGGC-UHFFFAOYSA-N 0.000 description 2
- 101000999373 Homo sapiens Interferon-related developmental regulator 2 Proteins 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 102100036480 Interferon-related developmental regulator 2 Human genes 0.000 description 2
- PMGCQNGBLMMXEW-UHFFFAOYSA-N Isoamyl salicylate Chemical compound CC(C)CCOC(=O)C1=CC=CC=C1O PMGCQNGBLMMXEW-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 150000001448 anilines Chemical class 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- JPIYZTWMUGTEHX-UHFFFAOYSA-N auramine O free base Chemical compound C1=CC(N(C)C)=CC=C1C(=N)C1=CC=C(N(C)C)C=C1 JPIYZTWMUGTEHX-UHFFFAOYSA-N 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
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- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical class C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 2
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- 125000001841 imino group Chemical group [H]N=* 0.000 description 2
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- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 2
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- FWWRTYBQQDXLDD-UHFFFAOYSA-N 1,4-dimethoxynaphthalene Chemical compound C1=CC=C2C(OC)=CC=C(OC)C2=C1 FWWRTYBQQDXLDD-UHFFFAOYSA-N 0.000 description 1
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- PLVUIVUKKJTSDM-UHFFFAOYSA-N 1-fluoro-4-(4-fluorophenyl)sulfonylbenzene Chemical compound C1=CC(F)=CC=C1S(=O)(=O)C1=CC=C(F)C=C1 PLVUIVUKKJTSDM-UHFFFAOYSA-N 0.000 description 1
- JPIXGEJAFGURDY-UHFFFAOYSA-N 1-methoxy-4-phenylmethoxynaphthalene Chemical compound C12=CC=CC=C2C(OC)=CC=C1OCC1=CC=CC=C1 JPIXGEJAFGURDY-UHFFFAOYSA-N 0.000 description 1
- OAGNKYSIOSDNIG-UHFFFAOYSA-N 1-methyl-3-[2-(3-methylphenoxy)ethoxy]benzene Chemical compound CC1=CC=CC(OCCOC=2C=C(C)C=CC=2)=C1 OAGNKYSIOSDNIG-UHFFFAOYSA-N 0.000 description 1
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- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
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- QLNWXBAGRTUKKI-UHFFFAOYSA-N metacetamol Chemical compound CC(=O)NC1=CC=CC(O)=C1 QLNWXBAGRTUKKI-UHFFFAOYSA-N 0.000 description 1
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- TXFJSCDVHWYLHG-UHFFFAOYSA-N n-(2-hydroxyphenyl)octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NC1=CC=CC=C1O TXFJSCDVHWYLHG-UHFFFAOYSA-N 0.000 description 1
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- JVKWTDRHWOSRFT-UHFFFAOYSA-N n-(4-hydroxyphenyl)dodecanamide Chemical compound CCCCCCCCCCCC(=O)NC1=CC=C(O)C=C1 JVKWTDRHWOSRFT-UHFFFAOYSA-N 0.000 description 1
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- JQBUMIBAURQBNA-UHFFFAOYSA-N n-butyl-2-hydroxybenzamide Chemical compound CCCCNC(=O)C1=CC=CC=C1O JQBUMIBAURQBNA-UHFFFAOYSA-N 0.000 description 1
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- GJNDMSSZEBNLPU-UHFFFAOYSA-N octadecylurea Chemical compound CCCCCCCCCCCCCCCCCCNC(N)=O GJNDMSSZEBNLPU-UHFFFAOYSA-N 0.000 description 1
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- QHDYIMWKSCJTIM-UHFFFAOYSA-N phenyl 1-hydroxynaphthalene-2-carboxylate Chemical compound C1=CC2=CC=CC=C2C(O)=C1C(=O)OC1=CC=CC=C1 QHDYIMWKSCJTIM-UHFFFAOYSA-N 0.000 description 1
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- NZNAAUDJKMURFU-UHFFFAOYSA-N tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)NC(C)(C)C1)C(C(=O)OC1CC(C)(C)NC(C)(C)C1)CC(=O)OC1CC(C)(C)NC(C)(C)C1 NZNAAUDJKMURFU-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、分散体組成物の経時的白色度低下およびその分散体組成物を用いた塗工液を塗布することにより作製した感熱記録材料の地肌被り性、特に高湿条件下での地肌被り性を改良することができる分散体組成物およびそれを用いた記録材料、特に感熱記録材料に関する。
【0002】
【従来の技術】
従来、熱、圧力などの記録エネルギーを用いた化学的発色システムは数多く知られている。その中で、通常無色又は淡色の染料前駆体と該染料前駆体と接触して発色する顕色剤との2成分発色系からなる発色システムは古くから知られており、代表的なものとしては、圧力エネルギーを用いた感圧記録材料や、熱エネルギーを用いた感熱記録材料、光エネルギーを用いた感光記録材料等が挙げられる。
【0003】
近年、ファクシミリ、プリンター、レコーダー、などの各種情報機器において、熱エネルギーによって記録を行う感熱記録方式が多く採用されるようになった。これらの感熱記録材料は、白色度が高い、外観、感触が普通紙に近い、発色感度等の記録適性が良い等、多くの優れた特性を備えており、また感熱記録は、装置が小型、メインテナンスフリー、騒音の発生がないことなどの利点があり、計測用記録計、ファクシミリ、プリンター、コンピューターの端末機、ラベル、乗車券等の自動券売機など広範囲の分野に用途を拡大してきた。中でも発色剤として、無色又は淡色の電子供与性染料前駆体(特にロイコ染料)とフェノール性化合物のような酸性顕色剤を用いるものは、該電子供与性化合物である染料前駆体の反応性が高く、電子受容性化合物である顕色剤と接触することにより、瞬間的に濃度の高い発色画像が得られるが、その反面、得られた発色画像は耐薬品性が劣ることから、プラスチックシートや消しゴムに含まれる可塑剤あるいは食品や化粧品に含まれる薬品に接触して、記録が消失しやすく、また、記録部分の耐光性が劣ることから、比較的短期間の日光暴露で記録が退色し、さらには消失するなど、記録の保存安定性に劣るという欠点を有していた。
【0004】
これらの要求に応えるために顕色剤として、ウレアウレタン化合物が提案された(国際公開番号WO00/14058等)。ウレアウレタン化合物は、イソシアナート化合物、ヒドロキシル化合物及びアミノ化合物を反応させて得られる生成物で、優れた画像保存性を有する顕色剤であるが、ウレアウレタン化合物及び無色または淡色の染料前駆体を含有する塗工液には、ビスフェノールA等の汎用の顕色剤を含有する塗工液と比較して塗工液の経時変化、特に着色による塗工液の白色度低下、高湿度条件下での地肌被りが大きいという問題があった。
【0005】
【発明が解決しようとする課題】
本発明は、分散体組成物または分散体組成物を用いて調製した塗工液の経時的白色度低下を改良するとともに、該分散体組成物を使用して作製した感熱記録材料の地肌被り、特に高湿度条件下での地肌被り(耐湿地肌被り)を改良できる分散体組成物を提供することを課題とする。
【0006】
【課題を解決するための手段】
本発明者らは、各種分散体組成物について鋭意研究を重ねた結果、ウレアウレタン化合物及び無色または淡色の染料前駆体を含有する分散体組成物を作製するに際し、それらのうち少なくとも1つの分散体作製時に、水溶性高分子、芳香族スルホン酸誘導体系陰イオン性界面活性剤およびポリカルボン酸誘導体系陰イオン性界面活性剤から選ばれる1種以上の分散剤を使用することにより上記目的が達成できることを見出し、本発明を完成するに至った。
【0007】
この分散体組成物およびこれにより調製された塗工液の着色抑制メカニズムについては、明確になっていない。しかし、発色にかかわると考えられる微粒子に対して該分散剤の安定化効果が大きいためなのではないかと考えている。分散体組成物を作製するに際し、それらのうち少なくとも1つの分散体作製時に、セルロース誘導体、陰イオン性界面活性剤である芳香族スルホン酸誘導体、ポリカルボン酸誘導体から選ばれる1種以上の分散剤を使用して作製された分散体組成物を用いることにより、分散体組成物ないしは塗工液の経時変化、特に着色による分散体組成物、塗工液の白色度低下、高湿度条件下での地肌被りを大幅に改善できるということは、誰にも予想できるものではなかった。
【0008】
すなわち、本発明は以下のとおりである。
発明1は、以下の、a)、b)成分を含有する分散体組成物である。
a)ウレアウレタン化合物、ならびに無色および淡色の染料前駆体から選ばれる1種以上の化合物
b)陰イオン性および非イオン性の水溶性高分子、ならびに陰イオン性、非イオン性、および両性界面活性剤から選ばれる1種以上の化合物である。
発明2は、a)ウレアウレタン化合物が下記式(I)〜(VI)のいずれかで示されるもののうちの1種以上である発明1の分散体組成物である。
【0009】
【化8】
【0010】
(ここにX、Y、Zは、芳香族化合物残基または複素環化合物残基または脂肪族化合物残基を表す。また、各残基は置換基を有していても良い。)
【0011】
【化9】
【0012】
(ここにX、Yは、芳香族化合物残基または複素環化合物残基または脂肪族化合物残基を表す。また、各残基は置換基を有していても良い。)
【0013】
【化10】
【0014】
(ここにX、Yは、芳香族化合物残基または複素環化合物残基または脂肪族化合物残基を表す。αは2価以上の価数を有する残基を表し、nは2以上の整数を表す。また、各残基は置換基を有していても良い。)
【0015】
【化11】
【0016】
(ここにZ、Yは、芳香族化合物残基または複素環化合物残基または脂肪族化合物残基を表す。βは2価以上の価数を有する残基を表し、nは2以上の整数を表す。また、各残基は置換基を有していても良い。)
【0017】
【化12】
【0018】
(ここにベンゼン環の水素原子は芳香族化合物残基又は脂肪族化合物残基又は複素環化合物残基により置換されていても良い。また、各残基は置換基を有していても良い。γは−SO2 −、−O−、−(S)n −、−(CH2 )n −、−CO−、−CONH−、式(a)のいずれか、
【0019】
【化13】
【0020】
又は存在しない場合を示す。nは1または2である。)
【0021】
【化14】
【0022】
(ここにベンゼン環の水素原子は芳香族化合物残基又は脂肪族化合物残基又は複素環化合物残基により置換されていても良い。また、各残基は置換基を有していても良い。δは−SO2 −、−O−、−(S)n −、−(CH2 )n −、−CO−、−CONH−、−NH−、−CH(COOR1 )−、−C(CF3 )2 −、−CR2R3 −のいずれか又は存在しない場合を示す。R1 、R2 、R3 、はアルキル基を表し、nは1または2である。)
【0023】
発明3は、b)成分が陰イオン性および非イオン性水溶性高分子、ならびに陰イオン性界面活性剤から選ばれる1種以上の化合物である、発明2の分散体組成物である。
発明4は、b)成分が陰イオン性および非イオン性水溶性高分子、ならびに陰イオン性界面活性剤から選ばれる1種以上の化合物である、発明2の分散体組成物である。
発明5はセルロース誘導体がヒドロキシプロピルメチルセルロースであり、芳香族スルホン酸誘導体が、ナフタレンスルホン酸ホルマリン縮合物のナトリウム塩であり、ポリカルボン酸誘導体が、ポリカルボン酸型であることを特徴とする発明4の分散体組成物である。
【0024】
発明6は、a)成分として、水溶性高分子の1種以上と界面活性剤の1種以上とを併用する発明1〜5いずれかの分散体組成物である。
発明7は、無色および淡色の染料前駆体から選ばれる1種以上の化合物を含む組成物、およびウレアウレタン化合物を含む組成物、のいずれか一方または両方の組成物を、b)成分を用いて分散する発明1〜6いずれかの分散体組成物の製造方法である。
発明8は、無色および淡色の染料前駆体から選ばれる1種以上の化合物を含む組成物、またはウレアウレタン化合物を含む組成物のいずれか一方の組成物のみを、40℃以上で3時間以上熱処理した後、両組成物を混合するか、発明7の分散体組成物の製造方法である。
【0025】
発明9は、無色および淡色の染料前駆体から選ばれる1種以上の化合物をふくむ組成物、およびウレアウレタン化合物をふくむ組成物を、それぞれ個別に40℃以上で3時間以上熱処理した後、混合する発明7の分散体組成物の製造方法である。
発明10は、発明1〜6いずれかの分散体組成物または発明7〜9いずれかの製造方法により製造された分散体組成物を含有する発色層を支持体上に設けた記録材料である。
発明11は、記録材料が感熱記録材料である発明10に記載の記録材料である。
【0026】
以下、本発明について詳細に説明を行う。
本発明に係わるウレアウレタン化合物とは、分子中にウレア基(−NHCONH−基)とウレタン基(−NHCOO−基)がそれぞれ少なくとも1個以上存在する化合物を言う。
本発明に係わるウレアウレタン化合物は、分子中にウレア基(−NHCONH−基)とウレタン基(−NHCOO−基)が存在すればどの様な化合物でもよいが、好ましくは式(I)〜(VI)のいずれかで示されるウレアウレタン化合物である。より好ましくは芳香族化合物又は複素環化合物である。更に好ましくは分子中にウレア基(−NHCONH−基)とウレタン基(−NHCOO−基)の他にスルホン基(−SO2−基)またはアニリド基(−NHCO−基)がウレア基に直接結合せずに存在することが望ましい。これらウレアウレタン化合物の詳細は例えば国際公開番号WO00/14058に記載があり、そこに記載された方法に従って合成することができる。
【0027】
本発明に係わる式(I)〜(VI)で示されるウレアウレタン化合物は、例えば以下に示す合成例に従って得られる化合物である。
式(I)のウレアウレタン化合物は、例えば一般式(VII)のOH基含有化合物と一般式(VIII)のイソシアナート化合物及び一般式(IX)のアミン化合物を、例えば下記反応式(A)にしたがって反応させることにより得ることができる。
【0028】
【化15】
【0029】
【化16】
【0030】
【化17】
【0031】
(ここにX、Y、Z は、芳香族化合物残基または複素環化合物残基または脂肪族化合物残基を表す。また、各残基は置換基を有していても良い。)
【0032】
【化18】
【0033】
式(II)のウレアウレタン化合物は、例えば一般式(VII)のOH基含有化合物と一般式(VIII)のイソシアナート化合物及び水を、例えば下記反応式(B)にしたがって反応させることにより得ることができる。
【0034】
【化19】
【0035】
式(III)のウレアウレタン化合物は、例えば一般式(VII)のOH基含有化合物と一般式(VIII)のイソシアナート化合物及び一般式(X)のアミン化合物を、例えば下記反応式(C)にしたがって反応させることにより得ることができる。
【0036】
【化20】
【0037】
(ここにαは2価以上の価数を有する残基を表し、nは2以上の整数を表す。)
【0038】
【化21】
【0039】
式(IV)のウレアウレタン化合物は、例えば一般式(IX)のアミン化合物と一般式(VIII)のイソシアナート化合物及び一般式(XI)のOH基含有化合物を、例えば下記反応式(D)にしたがって反応させることにより得ることができる。
【0040】
【化22】
【0041】
(ここにβは2価以上の価数を有する残基を表し、nは2以上の整数を表す。)
【0042】
【化23】
【0043】
式(V)のウレアウレタン化合物は、例えばモノフェノール化合物とジイソシアナートフェニル化合物及び一般式(XII)のジアミン化合物を、例えば下記反応式(E)にしたがって反応させることにより得ることができる。
【0044】
【化24】
【0045】
(ここにベンゼン環の水素原子は芳香族化合物残基又は脂肪族化合物残基又は複素環化合物残基により置換されていても良い。また、各残基は置換基を有していても良い。γは−SO2 −、−O−、−(S)n −、−(CH2 )n −、−CO−、−CONH−、式(a)のいずれか、
【0046】
【化25】
【0047】
又は存在しない場合を示す。nは1または2である。)
【0048】
【化26】
【0049】
式(VI)のウレアウレタン化合物は、例えばアニリン誘導体とジイソシアナートフェニル化合物及び一般式(XIII)のジヒドロキシ化合物を、例えば下記反応式(F)にしたがって反応させることにより得ることができる。
【0050】
【化27】
【0051】
(ここにベンゼン環の水素原子は芳香族化合物残基又は脂肪族化合物残基又は複素環化合物残基により置換されていても良い。また、各残基は置換基を有していても良い。δは−SO2 −、−O−、−(S)n −、−(CH2 )n −、−CO−、−CONH−、−NH−、−CH(COOR1 )−、−C(CF3 )2 −、−CR2R3 −のいずれか又は存在しない場合を示す。R1 、R2 、R3 、はアルキル基を表し、nは1または2である。)
【0052】
【化28】
【0053】
これら式(I)〜(VI)のウレアウレタン化合物のうち、好ましいものは式(II)〜(IV)の化合物であり、特に好ましいものは式(V)の化合物である。
本発明に係わるウレアウレタン化合物は、通常常温固体の無色または淡色の化合物でり、分子量は5000以下であることが好ましく、さらには2000以下であることが好ましい。
【0054】
また感熱記録材料においては融点を持った化合物の方が好ましく、融点は好ましくは40℃から500℃、特に好ましくは60℃から300℃の範囲にあることが望ましい。
分散体組成物の作製に当たっては当該ウレアウレタン化合物の1種類あるいは必要に応じて2種類以上を併用することもできる。
本発明の分散体組成物調製時に用いられる、無色または淡色の染料前駆体の一例であるロイコ染料は、既に感圧記録材料や感熱記録材料に用いられる公知の化合物であり、特に限定されるものではないが、例えば下記のものが挙げられる。
【0055】
(1)トリアリールメタン系化合物
3,3−ビス(p−ジメチルアミノフェニル)−6−ジメチルアミノフタリド(クリスタルバイオレットラクトン)、3,3−ビス(p−ジメチルアミノフェニル)フタリド、3−(p−ジメチルアミノフェニル)−3−(1,2−ジメチルインドール−3−イル)フタリド、3−(p−ジメチルアミノフェニル)−3−(2−メチルインドール−3−イル)フタリド、3−(p−ジメチルアミノフェニル)−3−(2−フェニルインドール−3−イル)フタリド、3,3−ビス(1,2−ジメチルインドール−3−イル)−5−ジメチルアミノフタリド、3,3−ビス(1,2−ジメチルインドール−3−イル)−6−ジメチルアミノフタリド、3,3−ビス(9 −エチルカルバゾール−3−イル)−5−ジメチルアミノフタリド、3,3−ビス(2−フェニルインドール−3−イル)−5−ジメチルアミノフタリド、3−p−ジメチルアミノフェニール−3−(1−メチルピロール−2−イル)−6−ジメチルアミノフタリド等。
【0056】
(2)ジフェニルメタン系化合物
4,4−ビス−ジメチルアミノフェニルベンズヒドリルベンジルエーテル、N−ハロフェニルロイコオーラミン、N−2,4,5−トリクロロフェニルロイコオーラミン等。
【0057】
(3)キサンテン系化合物
ローダミンBアニリノラクタム、ローダミンB−p−クロロアニリノラクタム、3−ジエチルアミノ−7−ジベンジルアミノフルオラン、3−ジエチルアミノ−7−オクチルアミノフルオラン、3−ジエチルアミノ−7−フェニルフルオラン、3−ジエチルアミノ−7−クロロフルオラン、3−ジエチルアミノ−6−クロロ−7−メチルフルオラン、3−ジエチルアミノ−7−(3,4−ジクロロアニリノ)フルオラン、3−ジエチルアミノ−7−(2−クロロアニリノ)フルオラン、3−ジエチルアミノ−6−メチル−7−アニリノフルオラン、3−(N−エチル−N−トリル)アミノ−6−メチル−7−アニリノフルオラン、3−ピペリジノ−6−メチル−7−アニリノフルオラン、3−(N−エチル−N−トリル)アミノ−6−メチル−7−フェネチルフルオラン、3−ジエチルアミノ−7−(4−ニトロアニリノ)フルオラン、3−ジブチルアミノ−6−メチル−7−アニリノフルオラン、3−(N−メチル−N−プロピル)アミノ−6−メチル−7−アニリノフルオラン、3−(N−エチル−N−イソアミル)アミノ−6−メチル−7−アニリノフルオラン、3−(N−メチル−N−シクロヘキシル)アミノ−6−メチル−7−アニリノフルオラン、3−(N−エチル−N−テトラヒドロフリル)アミノ−6−メチル−7−アニリノフルオラン等。
【0058】
(4)チアジン系化合物
ベンゾイルロイコメチレンブルー、p−ニトロベンゾイルロイコメチレンブルー等。
(5)スピロ系化合物
3−メチルスピロジナフトピラン、3−エチルスピロジナフトピラン、3,3−ジクロロスピロジナフトピラン、3−ベンジルスピロジナフトピラン、3−メチルナフト−(3−メトキシベンゾ)スピロピラン、3−プロピルスピロベンゾピラン等である。
【0059】
また、3,6−ビス(ジメチルアミノ)フルオレン−9−スピロ−3’−(6’−ジメチルアミノフタリド)、3−ジエチルアミノ−6−ジメチルアミノフルオレン−9−スピロ−3’−(6’−ジメチルアミノフタリド)、3,6−ビス(ジエチルアミノ)フルオレン−9−スピロ−3’−(6’−ジメチルアミノフタリド)、3−ジブチルアミノ−6−ジメチルアミノフルオレン−9−スピロ−3’−(6’−ジメチルアミノフタリド)、3−ジブチルアミノ−6−ジエチルアミノフルオレン−9−スピロ−3’−(6’−ジメチルアミノフタリド)、3,6−ビス(ジメチルアミノ)フルオレン−9−スピロ−3’−(6’−ジエチルアミノフタリド)、3−ジエチルアミノ−6−ジメチルアミノフルオレン−9−スピロ−3’−(6’−ジエチルアミノフタリド)、3−ジブチルアミノ−6−ジメチルアミノフルオレン−9−スピロ−3’−(6’−ジエチルアミノフタリド)、3,6−ビス(ジエチルアミノ)フルオレン−9−スピロ−3’−(6’−ジエチルアミノフタリド)、3,6−ビス(ジメチルアミノ)フルオレン−9−スピロ−3’−(6’−ジブチルアミノフタリド)、3−ジブチルアミノ−6−ジエチルアミノフルオレン−9−スピロ−3’−(6’−ジエチルアミノフタリド)、3−ジエチルアミノ−6−ジメチルアミノフルオレン−9−スピロ−3’−(6’−ジブチルアミノフタリド)、3,3−ビス[2−(4−ジメチルアミノフェニル)−2−(4−メトキシフェニル)エテニル]−4,5,6,7,−テトラクロロフタリド等の近赤外に吸収領域を持つ化合物等である。
【0060】
無色又は淡色の染料前駆体に対しウレアウレタン化合物は5〜500質量%使用することが好ましく、さらに好ましくは20〜300質量%である。ウレアウレタン化合物は、5質量%以上で染料前駆体を発色させるには十分であり、発色濃度も高い。また、ウレアウレタン化合物は、500質量%以下で過剰のウレアウレタンの化合物が残りにくく、経済的にも好ましい。
分散体組成物の作製に当たっては当該無色又は淡色の染料前駆体の1種類あるいは必要に応じて2種類以上を併用することもできる。
【0061】
本発明の分散体組成物に用いられる顕色剤としてのウレアウレタン化合物および/または無色または淡色の染料前駆体それぞれの分散体作製に用いられる必須の処理剤である分散剤は水溶性高分子および界面活性剤から選ばれる。これら分散剤の具体例を以下に述べる。水溶性高分子の具体例としては、例えば、PVA、スルホン酸変性PVA、ポリアクリルアミド、ポリメタクリルアミド、ポリアクリル酸、ポリメタクリル酸、ポリエチレンオキサイド、ポリプロピレンオキサイド、ポリビニルピロリドンまたはこれらの共重合体等の合成高分子、メチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、ヒドロキシエチルメチルセルロース、ヒドロキシプロピルメチルセルロース、カルボキシメチルセルロースナトリウム塩のようなセルロース系の高分子等が挙げられる。界面活性剤の具体例として、陰イオン性界面活性剤は、脂肪酸塩、アルキル硫酸エステル塩、アルキルススルホコハク酸塩、アルキルリン酸塩、ポリオキシエチレンアルキル硫酸エステル塩、ポリオキシエチレンアルキルアリル硫酸エステル塩、芳香族スルホン酸誘導体(例えばアルキルベンゼンスルホン酸の塩、アルキルジフェニルエーテルジスルホン酸の塩、アルキルナフタレンスルホン酸の塩、ナフタレンスルホン酸ホルマリン縮合物の塩)、ポリカルボン酸誘導体(例えば、各種カルボキシル基含有単量体の重合または共重合物、またはこれらの混合物)、ポリオキシエチレンアルキルリン酸エステルのようなものが挙げられ、非イオン性界面活性剤は、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルアリルエーテル、オキシエチレン・オキシプロピレンブロックコポリマー、ソルビタン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル、ポリオキシエチレンソルビトール脂肪酸エステル、グリセリン脂肪酸エステル、ポリオキシエチレン脂肪酸エステル、ポリオキシエチレンアルキルアミン、アルキルアルカノールアミドが挙げられ、両性界面活性剤は、アルキルベタイン、アミンオキサイド、イミダゾリニウムベタイン、その他ポリオキシエチレンアルキルエーテル硫酸トリエタノールアミン(例えば、エマール20T、花王製)、反応型陰イオン性界面活性剤(例えば、ラテムルS−180、ラテムルS−180A、花王製)、特殊高分子界面活性剤(例えば、ホモゲノールL−95、ホモゲノールL−100、花王製)が挙げられる。なかでも、水溶性高分子としては、セルロース誘導体が好ましく、さらに好ましくはヒドロキシプロピルメチルセルロースであり、界面活性剤は、陰イオン性界面活性剤が好ましく、さらに好ましくは芳香族スルホン酸誘導体およびポリカルボン酸誘導体(例えば、花王製品のデモールEP、ポイズ520、ポイズ521、ポイズ530、ホモゲノールL−18、ホモゲノールL−1820、ラテムルASK、第一工業製薬のディスコートN−14)が好ましく、芳香族スルホン酸誘導体に関しては、さらに好ましくはナフタレンスルホン酸ホルマリン縮合物の塩(例えば、花王製品のデモールN、デモールRN、デモールT、デモールNL、デモールRN−L、デモールMS、デモールSN−B、デモールC、デモールSS−L、デモールSC−30など)であり、分散体組成物の白色度低下改良効果、および/または記録材料の耐湿地肌被り性改良効果に優れている。これらの分散剤は単独で用いても2種以上併用してよく、必要に応じ、さらに本願で特定した分散剤以外の常用の水溶性高分子、陰イオン性界面活性剤、非イオン性界面活性剤、陽イオン性界面活性剤、両性界面活性剤、例えばアルキルアミン塩、第4級アンモニウム塩、アミンオキサイドなどと併用してもよい。特に、水溶性高分子のうちセルロース誘導体から選ばれる分散剤とナフタレンスルホン酸ホルマリン縮合物の塩およびポリカルボン酸誘導体から選ばれる分散剤の併用系が優れた効果を奏する。
【0062】
本願に特定する分散剤の使用割合は、分散体組成物の白色度低下改良効果、および/または記録材料の耐湿地肌被り性改良効果の点から、無色又は淡色の染料前駆体あるいはウレアウレタン化合物に対して0.5〜50質量%使用することが好ましく、さらに好ましくは1〜20質量%、さらに好ましくは5〜15質量%である。
【0063】
本発明の分散体組成物の調整法は、例えば以下のようにして行う。ウレアウレタン化合物を、分散能を有する水溶性高分子、陰イオン性界面活性剤と共に水溶液中に予め予備分散しておき、この予備分散体を必要に応じてペイントシェイカー、ボールミル、振動ボールミル、アトライター、サンドミル、ダイノミル、コロイドミル、サンドグラインダー等の粉砕機で適切な粒径になるまで粉砕することによりウレアウレタン化合物分散体を調整する。無色または淡色の染料前駆体の分散体を調整する際も同様な予備分散を行い、粉砕機で適切な粒径になるまで粉砕することにより無色または淡色の染料前駆体の分散体を調整する。
【0064】
ウレアウレタン化合物分散体および染料前駆体の分散体は、熱処理を行っても行わなくてもかまわないが、熱処理を行うことにより、白色度や耐湿地肌被りがさらに改善される。この際の熱処理条件としては、40℃以上で3時間以上行うことが好ましい。さらに好ましくは40℃から70℃の間の適切な温度で3時間以上熱処理を行うことが好ましい。さらに好ましくは、40℃では12時間以上、60℃では6時間以上熱処理を行うことが好ましい。40℃で3時間以下では熱処理による各分散液の白色度改良効果が小さい。70℃以上で熱処理を行うと、分散体の安定性が損なわれる虞がある。熱処理の方法に、特に制限はないが、通常、分散体を容器に入れ、加温し、攪拌羽で攪拌しながら行なわれる。
【0065】
本発明の分散体組成物は、前述のウレアウレタン化合物分散体と染料前駆体分散体を適当な比率で混合することにより調整される。
本発明の分散体組成物は、一般には、無色または淡色の染料前駆体の分散体、顕色剤としてのウレアウレタン化合物分散体、さらに必要に応じてウレアウレタン化合物以外の顕色剤、増感剤、あるいは顔料などの分散体を任意成分として用いて作製される。
【0066】
本発明の分散体組成物の作製にあたって、必要に応じ、公知の任意の添加剤が有効に用いられる。以下にこれらについて記載する。
本発明の分散体組成物の発色感度を向上させるために、分散体組成物に熱可融性物質を含有させることができる。熱可融性物質は60℃〜180℃の融点を有するものが好ましく、特に80℃〜140℃の融点を有するものが好ましい。例えば、ステアリン酸アミド、パルミチン酸アミド、N−メチロールステアリン酸アミド、β−ナフチルベンジルエーテル、N−ステアリルウレア、N,N′−ジステアリルウレア、β−ナフトエ酸フェニルエステル、1−ヒドロキシ−2−ナフトエ酸フェニルエステル、β−ナフトール(p−メチルベンジル)エーテル、1,4−ジメトキシナフタレン、1−メトキシ−4−ベンジルオキシナフタレン、N−ステアロイルウレア、p−ベンジルビフェニル、1,2−ジ(m−メチルフェノキシ)エタン、1−フェノキシ−2−(4−クロロフェノキシ)エタン、1,4−ブタンジオールフェニルエーテル、ジメチルテレフタレート、メタターフェニル、シュウ酸ジベンジル、シュウ酸(Pクロロベンジル)エステル、4−ヒドロキシ安息香酸メチル、4−ヒドロキシ安息香酸ベンジル、4−ヒドロキシ安息香酸(4’−クロロベンジル)、1,2−ビス(4’−ヒドロキシ安息香酸)エチル、1,5−ビス(4’−ヒドロキシ安息香酸)ペンチル、1,6−ビス(4’−ヒドロキシ安息香酸)ヘキシル等が挙げられる。さらに、4,4’−ジメトキシベンゾフェノン、4,4’−ジクロロベンゾフェノン、4,4’−ジフルオロベンゾフェノン、ジフェニルスルホン、4,4’−ジクロロジフェニルスルホン、4,4’−ジフルオロジフェニルスルホン、4,4’−ジクロロジフェニルジサルファイド、ジフェニルアミン、2−メチル−4−メトキシジフェニルアミン、N,N’−ジフェニル−p−フェニレンジアミン、1−(N−フェニルアミノ)ナフタレン、ベンジル、1,3−ジフェニル−1,3−プロパンジオン等を用いても良い。
【0067】
前記熱可融性物質は、単独でも、あるいは二種以上を混合して使用してもよく、十分な熱応答性を得るためには、無色または淡色の染料前駆体に対して10〜500質量%用いることが好ましく、さらに、20〜300質量%用いることがより好ましい。
本発明の分散体組成物において、さらに酸性顕色剤を加えることにより発色感度が向上し、鮮明な発色性能を有する分散体組成物が得られる。
【0068】
本発明の分散体組成物にさらに添加する酸性顕色剤としては、一般に使用される電子受容性の物質であるが、フェノール誘導体、芳香族カルボン酸誘導体あるいはその金属化合物、サリチル酸誘導体又はその金属塩、N,N−ジアリールチオ尿素誘導体、スルホニルウレア誘導体等が好ましい。特に好ましいものはフェノール誘導体であり、具体的には、2,2−ビス(4−ヒドロキシフェニル)プロパン、2,2−ビス(ヒドロキシフェニル)ブタン、2,2−ビス(ヒドロキシフェニル)ペンタン、2,2−ビス(ヒドロキシフェニル)ヘプタン、1,1−ビス(4−ヒドロキシフェニル)シクロヘキサン、ビス(4−ヒドロキシフェニル)酢酸ブチル、ビス(4−ヒドロキシフェニル)酢酸ベンジル、ビス(4−ヒドロキシフェニル)スルホン、ビス(3−メチル−4−ヒドロキシフェニル)スルホン、4−ヒドロキシフェニル−4’−メチルフェニルスルホン、3−クロロ−4−ヒドロキシフェニル−4’−メチルフェニルスルホン、3,4−ジヒドロキシフェニル−4’−メチルフェニルスルホン、4−イソプロピルフェニル−4’−ヒドロキシフェニルスルホン、4−イソプロピルオキシフェニル−4’−ヒドロキシフェニルスルホン、ビス(2−アリル−4−ヒドロキシフェニル)スルホン、4−ヒドロキシフェニル−4’−ベンジルオキシフェニルスルホン、4−イソプロピルフェニル−4’−ヒドロキシフェニルスルホン、ビス(2−メチル−3−tert.−ブチル−4−ヒドロキシフェニル)スルフィド、4−ヒドロキシ安息香酸メチル、4−ヒドロキシ安息香酸ベンジル、4−ヒドロキシ安息香酸(4’−クロロベンジル)、1,2−ビス(4’−ヒドロキシ安息香酸)エチル、1,5−ビス(4’−ヒドロキシ安息香酸)ペンチル、1,6−ビス(4’−ヒドロキシ安息香酸)ヘキシル、3−ヒドロキシフタル酸ジメチル、没食子酸ステアリル、没食子酸ラウリルなどを挙げることができる。サリチル酸誘導体としては、サリチル酸メチル、サリチル酸エチル、サリチル酸イソアミル、サリチル酸イソペンチル、サリチル酸フェニル、サリチル酸ベンジル、4−n−オクチルオキシサリチル酸、4−n−ブチルオキシサリチル酸、4−n−ペンチルオキシサリチル酸、3−n−ドデシルオキシサリチル酸、3−n−オクオクタノイルオキシサリチル酸、4−n−オクチルオキシカルボニルアミノサリチル酸、4−n−オクタノイルオキシカルボニルアミノサリチル酸、サリチルアミド、サリチルアニリド等が挙げられる。またスルホニルウレア誘導体の例としては4,4−ビス(p−トルエンスルホニルアミノカルボニルアミノ)ジフェニルメタン、4,4−ビス(o−トルエンスルホニルアミノカルボニルアミノ)ジフェニルメタン4,4−ビス(p−トルエンスルホニルアミノカルボニルアミノ)ジフェニルスルフィド、4,4−ビス(p−トルエンスルホニルアミノカルボニルアミノ)ジフェニルエーテル、N−(p−トルエンスルホニル)−N’−フェニル尿素等のアリールスルホニルアミノウレイド基を一個以上含有する化合物が挙げられる。
【0069】
無色または淡色の染料前駆体に対し、上記の酸性顕色剤は5〜500質量%使用することが好ましく、さらに好ましくは20〜300質量%である。酸性顕色剤が5質量%以上で染料前駆体の発色が良く、発色濃度も高い。また、酸性顕色剤500質量%以下で、酸性顕色剤が残りにくく、経済的にも有利であり好ましい。
本発明の分散体組成物に、さらにイソシアナート化合物を加えることにより保存性が向上する。本発明の分散体組成物に添加できるイソシアナート化合物としては、常温固体の無色または淡色の芳香族イソシアナート化合物または複素環イソシアナート化合物であり、例えば国際公開番号WO00/14058に記載されたイソシアネート化合物の1種以上を添加できる。これらのイソシアナートは、必要に応じて、フェノール類、ラクタム類、オキシム類等との付加化合物である、いわゆるブロックイソシアナートのかたちで用いてもよく、ジイソシアナートの2量体、例えば1−メチルベンゼン−2,4−ジイソシアナートの2量体、および3量体であるイソシアヌレートのかたちで用いてもよく、また、各種のポリオール等でアダクト化したポリイソシアナートとして用いることも可能である。また2,4−トルエンジイソシアナート、ジフェニルメタンジイソシアナート等の水アダクトイソシアナート、フェノールアダクトイソシアナート、アミンアダクトイソシアナート等、特願平8−225445号明細書、特願平8−250623号明細書記載のイソシアナート化合物及びイソシアナートアダクト体化合物でもよい。
【0070】
無色または淡色の染料前駆体にたいしイソシアナート化合物は5〜500質量%使用することが好ましく、さらに好ましくは20〜200質量%である。イソシアナート化合物が5質量%以上で保存性の向上効果が十分であり、発色濃度も高い。また、イソシアナート化合物が500質量%以下で、過剰のイソシアナート化合物が残りにくく、経済的にも有利であり好ましい。
また、本発明の分散体組成物にイミノ化合物を加えることにより一層保存性が向上する。
【0071】
本発明の分散体組成物に添加できるイミノ化合物とは、少なくとも1個のイミノ基を有する常温固形の無色または淡色の化合物で、目的に応じて2種以上のイミノ化合物を併用することも可能である。これらの具体例として、例えば国際公開番号WO00/14058に記載されたものが挙げられる。
これらの中でも特に、イミノイソインドリン誘導体が好ましく、さらに、1,3−ジイミノ−4,5,6,7−テトラクロロイソインドリン、3−イミノ−4,5,6,7−テトラクロロイソインドリン−1−オン、1,3−ジイミノ−4,5,6,7−テトラブロモイソインドリンが好ましい。
【0072】
無色または淡色の染料前駆体にたいしイミノ化合物は5〜500質量%使用することが好ましく、さらに好ましくは20〜200質量%である。イミノ化合物が5質量%以上で保存性の向上効果が発揮される。また、イミノ化合物が500質量%以下で、過剰のイミノ化合物が残りにくく、経済的にも有利であり好ましい。
【0073】
さらに本発明の分散体組成物にアミノ化合物を加えることにより地肌及び印字の保存性が向上する。添加することができるアミノ化合物としては、少なくとも1個の1級あるいは2級あるいは3級のアミノ基を有する無色または淡色の物質であり、例えば国際公開番号WO00/14058に記載されているような、アニリン誘導体、複素環系化合物、ヒンダードアミン化合物等が挙げられる。
アミノ化合物は、単独でも、あるいは二種以上を混合して使用しても良く、耐可塑剤性における印字保存性を向上させるためには無色または淡色の染料前駆体に対して1〜500質量%であることが好ましい。アミノ化合物の含有量が、ウレアウレタン化合物に対して1質量%以上で印字保存性の向上が得られる。また、500質量%以下で使用すれば、性能の向上は十分でコスト的にも有利である。
【0074】
更に、地肌かぶりや熱応答性等の向上のために、N−ステアリル−N’−(2−ヒドロキシフェニル)ウレア、N−ステアリル−N’−(3−ヒドロキシフェニル)ウレア、N−ステアリル−N’−(4−ヒドロキシフェニル)ウレア、p−ステアロイルアミノフェノール、o−ステアロイルアミノフェノール、p−ラウロイルアミノフェノール、p−ブチリルアミノフェノール、m−アセチルアミノフェノール、o−アセチルアミノフェノール、p−アセチルアミノフェノール、o−ブチルアミノカルボニルフェノール、o−ステアリルアミノカルボニルフェノール、p−ステアリルアミノカルボニルフェノール、1,1,3−トリス(3−tert.−ブチル−4−ヒドロキシ−6−メチルフェニル)ブタン、1,1,3−トリス(3−tert.−ブチル−4−ヒドロキシ−6−エチルフェニル)ブタン、1,1,3−トリス(3,5−ジ−tert.−ブチル−4−ヒドロキシフェニル)ブタン、1,1,3−トリス(3−tert.−ブチル−4−ヒドロキシ−6−メチルフェニル)プロパン、1,2,3−トリス(3−tert.−ブチル−4−ヒドロキシ−6−メチルフェニル)ブタン、1,1,3−トリス(3−フェニル−4−ヒドロキシフェニル)ブタン、1,1,3−トリス(3−シクロヘキシル−4−ヒドロキシ−5−メチルフェニル)ブタン、1,1,3−トリス(3−シクロヘキシル−4−ヒドロキシ−6−メチルフェニル)ブタン、1,1,3−テトラ(3−フェニル−4−ヒドロキシフェニル)プロパン、1,1,3,3−テトラ(3−シクロヘキシル−4−ヒドロキシ−6−メチルフェニル)プロパン、1,1−ビス(3−tert.−ブチル−4−ヒドロキシ−6−メチルフェニル)ブタン、1,1−ビス(3−シクロヘキシル−4−ヒドロキシ−6−メチルフェニル)ブタン等のフェノール化合物を添加することも可能である。
【0075】
本発明の分散体組成物を含有する塗工液を、塗布などの方法で何らかの支持体上に発色層を形成せしめることにより、記録材料とすることができる。その構成は記録材料の種類によって異なる。
本発明の分散体組成物は、感熱記録材料、感圧記録材料など種々の記録材料として使用することができるが、特に感熱記録材料として好適である。
記録材料が感熱記録材料である場合は、支持体上に加熱発色する感熱記録層を設ける必要がある。具体的には、上記のウレアウレタン化合物、ロイコ染料のごとき無色又は淡色の染料前駆体、熱可融性物質等を含有する分散体組成物と感熱記録層の形成に必要なその他の成分を分散体として調製し、混合して塗工液を調製し、さらに該塗工液を支持体上に塗工し感熱記録層を形成する。各分散体の調製は、これまでに挙げた種々の化合物から選ばれる1種または複数種を、水溶性高分子、界面活性剤など分散能を持つ化合物を含有する水溶液中でサンドグラインダー等で微粉砕することにより得られる。ここにおいて、ウレアウレタン化合物および無色又は淡色の染料前駆体のいずれかまたは両方に本願発明で特定する分散剤の1種以上を用いることが必須であり、各分散体の粒子径は、0.1〜10μm特に1μm前後とすることが好ましい。
【0076】
感熱記録層の形成に必要なその他成分としては、以下のものが挙げられる。
顔料としては、例えばケイソウ土、タルク、カオリン、焼成カオリン、炭酸カルシウム、炭酸マグネシウム、酸化チタン、酸化亜鉛、酸化珪素、水酸化アルミニウム、尿素−ホルマリン樹脂等を含有させることもできる。また、ヘッド摩耗防止、スティッキング防止などの目的でステアリン酸亜鉛、ステアリン酸カルシウム等の高級脂肪酸金属塩、パラフィン、酸化パラフィン、ポリエチレン、酸化ポリエチレン、ステアリン酸アミド、カスターワックス等のワックス類を、また、ジオクチルスルホコハク酸ナトリウム等の分散剤、ベンゾフェノン系、ベンゾトリアゾール系などの紫外線吸収剤、画像保存剤、退色抑制剤さらに界面活性剤、蛍光染料等も必要に応じて含有させることができる。
【0077】
感熱記録層の形成に用いることができるバインダーとしては、例えば、デンプン類、ヒドロキシエチルセルロース、メチルセルロース、カルボキシメチルセルロース、ゼラチン、カゼイン、ポリビニルアルコール、変性ポリビニルアルコール、ポリアクリル酸ソーダ、アクリルアミド/アクリル酸エステル共重合体、アクリルアミド/アクリル酸エステル/メタクリル酸3元共重合体、スチレン/無水マレイン酸共重合体のアルカリ塩、エチレン/無水マレイン酸共重合体のアルカリ塩等の水溶性バインダー、およびスチレン/ブタジエン共重合体、アクリロニトリル/ブタジエン共重合体、アクリル酸メチル/ブタジエン共重合体などのラテックス系水不溶性バインダー等が挙げられる。
【0078】
感熱記録層の支持体としては、紙が主として用いられるが、紙の他に各種織布、不織布、合成樹脂フィルム、ラミネート紙、合成紙、金属箔、あるいはこれらを組み合わせた複合シートを目的に応じて任意に用いることができる。感熱記録層は単一の層で構成されていても複数で構成されていてもよい。例えば、各発色成分を一層ずつに含有させ、多層構造としてもよい。また、この感熱記録層上に、1層又は複数の層からなる保護層を設けてもよいし、支持体と感熱記録層の間に、1層又は複数の層からなる中間層を設けてもよい。この感熱記録層は、各発色成分あるいはその他の成分を微粉砕して得られる各々の水性分散液とバインダー等を混合し、支持体上に塗布、乾燥することにより得ることができる。塗布量は塗布液が乾燥した状態で1から15g/m2 が好ましい。
【0079】
記録材料が感圧記録材料である場合は、例えば、米国特許第2505470号公報、同2712507号公報、同2730456号公報、同2730457号公報、同3418250号公報等に開示されているような形態をとることができる。すなわち、染料前駆体を単独、または、混合して、アルキル化ナフタレン、アルキル化ジフェニル、アルキル化ジフェニルメタン、アルキル化ジアリールエタン、塩素化パラフィン等の合成油、また、植物油、動物油、鉱物油等の単独または混合物からなる溶媒に溶解し、これをバインダー中に分散するか、またはマイクロカプセル中に含有させた分散液を支持体上にバインダー等と共に塗布することにより得る上用紙と、ウレアウレタン化合物(およびアミノ化合物あるいは/および顕色剤等)の分散体を塗布した下用紙の塗布面どうしを重ね合わせた感圧記録紙や、さらに片面にウレアウレタン化合物の分散体を塗布し、もう一面に染料前駆体を塗布した中用紙を、上記の上用紙と下用紙の間に挟んだ感圧記録紙、または、支持体の同一面に上記ウレアウレタン化合物および(およびアミノ化合物あるいは/および顕色剤)の分散体組成物と上記染料前駆体を含む分散体組成物を混合、あるいは多層に塗布したセルフタイプ、または、染料前駆体、ウレアウレタン化合物、(およびアミノ化合物あるいは/および顕色剤等)の何れをもマイクロカプセル化して混合塗布したセルフタイプ等種々の形態が可能である。
【0080】
本発明の分散体組成物を感圧記録材料として使用する場合も、酸性顕色剤を加えることによって画像濃度が向上し鮮明な発色の感圧記録材料が得られるようになる。
その酸性顕色剤としては、やはり電子受容性の物質が用いられるが、その例としては、酸性白土、活性白土、アタパルジャイト、ベンナイト、ゼオライト、コロイダルシリカ、ケイ酸マグネシウム、タルク、ケイ酸アルミニウム等の無機化合物、あるいはフェノール、クレゾール、ブチルフェノール、オクチルフェノール、フェニルフェノール、クロロフェノール、サリチル酸等、またはこれから誘導されるアルデヒド縮合ノボラック樹脂およびそれらの金属塩、3−イソプロピルサリチル酸、3−フェニルサリチル酸、3−シクロヘキシルサリチル酸、3,5−ジ−t−ブチルサリチル酸、3,5−ジ(α−メチルベンジル)サリチル酸、3,5−ジ−t−オクチルサリチル酸、3−メチル−5−ベンジルサリチル酸、3,5−ジ(α、α−ジメチルベンジル)サリチル酸、3−フェニル−5−(α、α−ジメチルベンジル)サリチル酸等のサリチル酸誘導体及びこれらの金属塩等があげられる。
【0081】
さらに本発明に係わる記録材料においては、ヒンダードフェノール化合物に代表される紫外線吸収剤、画像保存剤、退色防止剤、光安定剤等を記録層に含んでもよい。例えば1,1,3−トリス(3’−シクロヘキシル−4’−ヒドロキシフェニル)ブタン、1,1,3−トリス(2−メチル−4−ヒドロキシ−5−シクロヘキシルフェニル)ブタン、1,1,3−トリス(2−メチル4−ヒドロキシ−5−tert−ブチルフェニル)ブタン、トリス(2,6−ジメチル−4−tert−ブチル−3−ヒドロキシベンジル)イソシアヌレート、4,4’−チオビス(3−メチル−6−tert−ブチルフェノール)、4,4’−ブチリデンビス(3−メチル−6−tert−ブチルフェニル)、1,3,5−トリメチル−2,4,6−トリス(3、5−ジ−tert−ブチル−4−ヒドロキシベンジル)ベンゼン、2,2’−ジヒドロキシ−4、4’−ジメトキシベンゾフェノン、p−オクチルフェニルサリシレート、2−(2’−ヒドロキシ−5’−メチルフェニル)ベンゾトリアゾール、エチル−2−シアノ−3,3’−ジフェニルアクリレート、テトラ(2,2,6,6−テトラメチル−4−ピペリジル)1,2,3,4−ブタンテトラカルボエート、ナトリウム−2,2’−メチレンビス(4,6−ジ−tert−ブチルフェニル)ホスファイト等が挙げられる。
【0082】
【発明の実施の形態】
以下実施例によって本発明を更に詳しく説明する。
なお、各物性の評価は以下の方法で行った。
<耐湿地肌被り性>
感熱記録紙に印可重圧24Vパルス幅1.5msecで印字し、その試料を40℃×90%RH雰囲気下に24時間放置後に未印字部(地肌)の光学濃度をマクベス濃度計RD918で測定することにより評価した。評価はOD値の低いもの(白色度の高いもの)を耐湿地肌被り性良好とした。
OD値の評価基準 ◎:0.07未満、○:0.07以上0.1未満、△:0.1以上0.15未満、×:0.15以上0.20未満、××:0.20以上
【0083】
<分散体組成物の白色度測定>
染料分散体(染料の含有率10wt%)5g、顕色剤分散体(顕色剤の含有率20wt%)5gを混合し、混合分散体(分散体組成物)の白色度をタッチパネル式カラーコンピューターSM−T(スガ試験機製)で測定した。この混合分散体を、着色現象加速のために40℃条件下で3h放置後に白色度を再度測定し、熱処理前後の白色度の差(Δ白色度値)を求めることにより評価した。
Δ白色度の評価基準 ◎:5未満、○:5以上7未満、△:7以上15未満、×:15以上20未満、××:20以上
【0084】
<粒度分布の測定>
平均粒径は、SALD−7000 LASER DIFFRACTION PARTICLE SIZE ANALYZER(島津製作所製)で測定した。
製造例1(ウレアウレタン化合物の合成)
2,4−トルエンジイソシアナート105.6g、フェノール68.4gに溶媒として酢酸エチル112.4gを加えた。これに4,4’−ジアミノジフェニルスルホンを9.41gづつ8回に分割して添加しながら1時間で一段目の反応を終了させると、反応液は白色スラリー状になった。次に、反応混合物に361.8gの酢酸エチルを添加して希釈した。希釈した反応混合物を30℃から60℃まで10℃/hで昇温しながら0.375wt%のトリエチルアミンの酢酸エチル溶液18.1gを30分かけて添加した。60℃に到達後は、60℃でさらに15時間反応を継続した。この反応混合物を60℃から30℃まで冷却し、2,4−トルエンジイソシアナート15.8gを添加して、30℃で1時間攪拌し、反応を終了させた。次に減圧条件下で酢酸エチルを除去し、窒素雰囲気下65℃、約130torrで8時間減圧乾燥を行なうことにより、265gの白色結晶のウレアウレタン化合物(以下UUと記述)が得られた。
【0085】
【実施例1】
顕色剤UU 52.5g、固形分5.38%のメトローズ60SH03(ヒドロキシプロピリメチルセルロース、信越化学工業製)48.75g、固形分5.38%のデモールT(β−ナフタレンスルホン酸ホルマリン縮合物ナトリウム塩、花王製)48.75g及びガラスビーズ(φ0.6mm)をメスシリンダーで150ml量りとって400mlのベッセル容器に入れ、回転数2000rpmで3時間サンドグラインダー(アイメックス社製)で粉砕・分散して固形分38.5%のUU分散体を140g得た。このUU分散体は、200mlフラスコに入れ、ウォーターバスを用いてフラスコ内温が60℃になるように維持し、スリーワンモーターを用い250rpmで12時間撹拌することにより加熱処理を行った。熱処理後のUU分散体の平均粒径は0.46μmであった。
【0086】
また、染料の3−ジブチルアミノ−6−メチル−7−アニリノフルオラン(以下ODB2と記述)52.5g、固形分5.38%のゴーセランL3266(スルホン酸変性PVA,日本合成化学製)水溶液97.5g及びガラスビーズ(φ0.6mm)をメスシリンダーで150ml量りとって400mlのベッセル容器に入れ、回転数2000rpmで3時間サンドグラインダー(アイメックス社製)で粉砕・分散して固形分38.5%のODB2分散体を得た。このODB2分散体は、200mlフラスコに入れ、ウォーターバスを用いてフラスコ内温が40℃になるように維持し、スリーワンモーターを用い250rpmで24時間撹拌することにより加熱処理を行った。熱処理後のODB2分散体の平均粒径は0.49μmであった。
【0087】
また、増感剤ジフェニルスルホン(以下DPと記述)52.5g、固形分5.38%のゴーセランL3266(スルホン酸変性PVA,日本合成化学製)水溶液97.5g及びガラスビーズ(φ0.6mm)をメスシリンダーで150ml量りとって400mlのベッセル容器に入れ、回転数2000rpmで3時間サンドグラインダー(アイメックス社製)で粉砕・分散して固形分38.5%のDP分散体を得た。このとき得られたDP分散体の平均粒径は0.60μmであった。
また、炭酸カルシウム10gを水30gと混合してスターラーで撹拌分散して、分散体を得た。
【0088】
感熱紙の耐湿地肌被り性の評価は、以下のような手順で行った。
これらの分散体を上記UU分散体の乾燥固形分30重量部、ODB2分散体の乾燥固形分15重量部、DP分散体の乾燥固形分30重量部、炭酸カルシウム分散体の乾燥固形分20重量部、さらに固形分濃度16重量%のステアリン酸亜鉛分散体の乾燥固形分10重量部、さらに15重量%ポリビニルアルコールの乾燥固形分10重量部の割合(乾体基準)で撹拌混合して塗工液を得た。
【0089】
この塗工液を50g/m2 の秤量をもつ原紙上にバコーターで塗布し、乾燥後スーパーカレンダーで処理して感熱記録紙を得た。このときの塗布量は、ODB2換算で、0.40g/m2であった。
こうして作製した感熱紙に印可重圧24Vパルス幅1.5msecで印字し、40℃×90%RH雰囲気下に24時間放置後のOD値を測定することにより耐湿地肌の被り性を評価した。測定の結果、OD値は0.06と良好であった。
【0090】
また、分散体組成物の白色度については以下のような手順で評価した。
ODB2分散体を10%(ODB2の重量%)に希釈し、UU分散体は20%(UUの重量%)に希釈して、2つの混合分散液中の含有重量比がODB2/UU=1/2になるように混合して評価試料を調整した。この白色度を測定後、40℃で3時間放置し、再度白色度を測定し、熱処理前後の白色度の差(Δ白色度)を算出した。その結果、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0091】
【実施例2】
実施例1において、UUの分散体作製時に分散剤としてメトローズ60SH03のかわりにデモールSSL(特殊芳香族スルホン酸ホルマリン縮合物ナトリウム塩、花王製)水溶液48.75gを用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.49μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は2であり良好であった。結果はまとめて表1に示した。
【0092】
【実施例3】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のメトローズ60SH03水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0093】
【実施例4】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のデモールT水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0094】
【実施例5】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のデモールEP(特殊ポリカルボン酸型高分子界面活性剤、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は4であり良好であった。結果はまとめて表1に示した。
【0095】
【実施例6】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のメトローズSM15(メチルセルロース、信越化学工業製)水溶液97.5gを単独で用い、UU分散体の熱処理を行なわなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0096】
【実施例7】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のHPC−L(ヒドロキシプロピルセルロース、日本曹達製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.08、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0097】
【実施例8】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のセロゲン6A(カルボキシメチルセルロースナトリウム塩、第一工業製薬製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.48μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0098】
【実施例9】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%のクラレポバールPVA−103(完全鹸化タイプ、重合度 300、クラレ製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0099】
【実施例10】
実施例3において、UUの分散体作製時に分散剤として固形分5.38%の界面活性剤DKSディスコートN−14(特殊ポリカルボン酸NH4塩、第一工業製薬製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は8であり良好であった。結果はまとめて表1に示した。
【0100】
【実施例11】
実施例1において、増感剤をDPのかわりにBONを用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたBON分散体の平均粒径は0.50μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0101】
【実施例12】
実施例1において、増感剤をDPのかわりにHS3520を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたHS3520分散体の平均粒径は0.53μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0102】
【実施例13】
実施例1において、増感剤をDPのかわりにパラベンジルビフェニル(以下PBBPと記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたPBBP分散体の平均粒径は0.51μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0103】
【実施例14】
実施例1において、染料をODB2のかわりに3−ジエチルアミノ−6−メチル−7−アニリノフルオラン(以下ODBと記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたODB分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.10、Δ白色度は9であり良好であった。結果はまとめて表1に示した。
【0104】
【実施例15】
実施例1において、染料をODB2のかわりに3−イソアミルエチルアミノ−6−メチル−7−アニリノフルオラン(以下S205と記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたS205分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0105】
【実施例16】
実施例1において、染料をODB2のかわりに3−ジペンチルアミノ−6−メチル−7−アニリノフルオラン(以下BLACK305と記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたBLACK305分散体の平均粒径は0.49μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0106】
【実施例17】
実施例1において、染料をODB2のかわりに3−エチル−p−トリルアミノ−6−メチル−7−アニリノフルオラン(以下ETACと記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたETAC分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0107】
【実施例18】
実施例1において、染料をODB2のかわりに3−ジブチルアミノ−7−(o−フルオロ)−アニリノフルオラン(以下TG21と記述)を用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたTG21分散体の平均粒径は0.48μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は6であり良好であった。結果はまとめて表1に示した。
【0108】
【実施例19】
実施例1において、UUの分散体作製時に分散剤としてメトローズ60SH03のかわりにゴーセランL3266(スルホン酸変性PVA、日本合成化学製)水溶液48.75gを用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.49μmであった。耐湿地肌被り性の評価結果は、OD値0.09、Δ白色度は7であり良好であった。結果はまとめて表1に示した。
【0109】
【実施例20】
実施例1において、UUの分散体作製時に分散剤としてデモールTのかわりにDKSディスコートN−14(特殊ポリカルボン酸アンモニウム塩、第一工業製薬製)水溶液48.75gを用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.49μmであった。耐湿地肌被り性の評価結果は、OD値0.06、Δ白色度は5であり良好であった。結果はまとめて表1に示した。
【0110】
【実施例21】
実施例1において、UUの分散体を加熱処理しなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.09、Δ白色度は9であった。結果はまとめて表1に示した。
【0111】
【実施例22】
実施例2において、UUの分散体を加熱処理しなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.49μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は9であった。結果はまとめて表1に示した。
【0112】
【実施例23】
実施例5において、UUの分散体を加熱処理しなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.48μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は9であった。結果はまとめて表1に示した。
【0113】
【実施例24】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のL3266水溶液97.5gを単独で用い、UU分散体の熱処理を行なわず、ODB2分散液のみ熱処理を行ったこと以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.45μmであった。耐湿地肌被り性の評価結果は、OD値0.13、Δ白色度は15であった。
【0114】
【実施例25】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のL3266水溶液97.5gを単独で用い、UU分散体、ODB2分散体ともに熱処理を行なった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.45μmであった。耐湿地肌被り性の評価結果は、OD値0.12、Δ白色度は11であった。
【0115】
【実施例26】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%の60SH03水溶液97.5gを単独で用い、UU分散体、ODB2分散体ともに熱処理を行わなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.09、Δ白色度は10であった。
【0116】
【実施例27】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のSM15水溶液97.5gを単独で用い、UU分散体、ODB2分散体ともに熱処理を行わなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.09、Δ白色度は9であった。
【0117】
【実施例28】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のL3266水溶液97.5gを単独で用い、ODB2の分散体作成時に分散剤として固形分5.38%のメトローズ60SH03を48.75g、固形分5.38%のデモールTを48.75gを用い、UU分散体、ODB2分散体ともに熱処理を行わなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.14、Δ白色度は14であった。
【0118】
【実施例29】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のL3266水溶液97.5gを単独で用い、ODB2の分散体作成時に分散剤として固形分5.38%のメトローズ60SH03を48.75g、固形分5.38%のデモールT 48.75gを用い、UU分散体は60℃×12h、ODB2分散体は40℃×24h熱処理を行った以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.07、Δ白色度は6であった。
【0119】
【実施例30】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のL3266水溶液97.5gを単独で用い、ODB2の分散体作成時に分散剤として固形分5.38%のメトローズ60SH03を48.75g、固形分5.38%のデモールTを48.75g用い、UU分散体、ODB2分散体ともに熱処理を行わなかった以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.10、Δ白色度は9であった。
【0120】
【実施例31】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のネオコールSWC(ジ−アルキルスルホコハク酸エステルナトリウム、第一工業製薬製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行い感熱紙性能、分散体組成物の白色度評価を行なった。このとき得られたUU分散体の平均粒径は0.45μmであった。耐湿地肌被り性の評価結果は、OD値0.09、Δ白色度は14であった。
【0121】
【実施例32】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のレベノールWX(ポリオキシエチレンアルキルエーテル硫酸ナトリウム、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行った。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.10、Δ白色度は11であった。
【0122】
【実施例33】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のエマルゲン106(ポリオキシエチレンラウリルエーテル、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行った。このとき得られたUU分散体の平均粒径は0.46μmであった。耐湿地肌被り性の評価結果は、OD値0.10、Δ白色度は11であった。
【0123】
【実施例34】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のエマノーン4110(ポリエチレングリコールモノオレエート、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行った。このとき得られたUU分散体の平均粒径は0.47μmであった。耐湿地肌被り性の評価結果は、OD値0.11、Δ白色度は11であった。
【0124】
【表1】
【0125】
【表2】
【0126】
【表3】
【0127】
【表4】
【0128】
【比較例1】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のコータミン24P(ラウリルトリメチルアンモニウムクロライド、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行おうとしたが、ODB2分散体との混合の際に凝固し、良好な分散体組成物が得られなかった。
【0129】
【比較例2】
実施例1において、UUの分散体作製時に分散剤として固形分5.38%のサニゾールC(アルキルベンジルメチルアンモニウムクロライド、花王製)水溶液97.5gを単独で用いた以外は同一の方法で分散体の調製を行おうとしたが、ODB2分散体との混合の際に凝固し、良好な分散体組成物が得られなかった。
【0130】
【発明の効果】
染料及びウレアウレタン化合物を含有する分散体組成物を作製する際に用いる分散剤として水溶性高分子の中でもセルロース誘導体、陰イオン性界面活性剤のなかでもナフタレンスルホン酸誘導体、ポリカルボン酸誘導体から選ばれる1種以上の分散剤を単独または併用することにより、分散体組成物の経時的白色度低下およびその分散体組成物を用いて作製した感熱記録材料の地肌被り性、特に高湿条件下での地肌被り性を改良することができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for reducing the whiteness of a dispersion composition over time and the covering property of a heat-sensitive recording material produced by applying a coating liquid using the dispersion composition, particularly the covering under high humidity conditions. The present invention relates to a dispersion composition capable of improving the recording property and a recording material using the same, particularly a heat-sensitive recording material.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, many chemical coloring systems using recording energy such as heat and pressure are known. Among them, a color forming system composed of a two-component color developing system of a colorless or pale-colored dye precursor and a developer that forms a color in contact with the dye precursor has been known for a long time, and as a typical one, And a pressure-sensitive recording material using pressure energy, a heat-sensitive recording material using heat energy, and a photosensitive recording material using light energy.
[0003]
2. Description of the Related Art In recent years, in various information devices such as a facsimile, a printer, a recorder, and the like, a thermal recording method in which recording is performed using thermal energy has been often used. These heat-sensitive recording materials have many excellent characteristics such as high whiteness, good appearance and feel close to plain paper, good recording suitability such as color development sensitivity, and the like. It has advantages such as maintenance-free and no noise generation, and its use has been expanded to a wide range of fields such as measurement recorders, facsimile machines, printers, computer terminals, labels, and automatic ticket vending machines such as tickets. Among them, those using a colorless or pale-color electron-donating dye precursor (especially leuco dye) and an acidic developer such as a phenolic compound as the color-developing agent have a reactivity of the electron-donating compound dye precursor. High, by contact with a color developer which is an electron accepting compound, a color image with high density can be obtained instantaneously, but on the other hand, the obtained color image is inferior in chemical resistance. The record is easily lost when it comes into contact with the plasticizer contained in the eraser or the chemical contained in food or cosmetics, and because the light resistance of the recorded part is inferior, the record fades due to relatively short exposure to sunlight, Further, it has a disadvantage that the storage stability of the record is poor, such as disappearance.
[0004]
To meet these demands, urea urethane compounds have been proposed as color developers (International Publication No. WO 00/14058, etc.). The urea urethane compound is a product obtained by reacting an isocyanate compound, a hydroxyl compound and an amino compound, and is a developer having excellent image storability.However, a urea urethane compound and a colorless or pale color dye precursor are used. The coating solution contains a time-dependent change in the coating solution, especially a decrease in the whiteness of the coating solution due to coloring, under high humidity conditions compared to a coating solution containing a general-purpose developer such as bisphenol A. There is a problem that the background is large.
[0005]
[Problems to be solved by the invention]
The present invention improves the temporal decrease in whiteness of a dispersion composition or a coating solution prepared using the dispersion composition, and also covers the heat-sensitive recording material produced using the dispersion composition. In particular, it is an object of the present invention to provide a dispersion composition that can improve background fogging (wet ground fogging) under high humidity conditions.
[0006]
[Means for Solving the Problems]
The present inventors have conducted intensive studies on various dispersion compositions. As a result, when producing a dispersion composition containing a urea urethane compound and a colorless or pale-colored dye precursor, at least one dispersion among them was prepared. The above object is achieved by using at least one dispersant selected from a water-soluble polymer, an aromatic sulfonic acid derivative-based anionic surfactant and a polycarboxylic acid derivative-based anionic surfactant during the preparation. They have found that they can do this and have completed the present invention.
[0007]
The dispersant composition and the mechanism for suppressing the coloring of the coating liquid prepared thereby are not clear. However, it is thought that this is because the dispersing agent has a large stabilizing effect on the fine particles which are considered to be involved in color formation. In preparing a dispersion composition, at least one of the dispersions is prepared, and at least one dispersant selected from cellulose derivatives, aromatic sulfonic acid derivatives as anionic surfactants, and polycarboxylic acid derivatives. By using the dispersion composition prepared by using, the dispersion composition or the aging of the coating liquid, especially the dispersion composition due to coloring, the whiteness of the coating liquid decreases, under high humidity conditions It could not be expected that anyone could significantly improve the background.
[0008]
That is, the present invention is as follows.
Invention 1 is a dispersion composition containing the following components a) and b).
a) one or more compounds selected from urea urethane compounds and colorless and pale color dye precursors
b) One or more compounds selected from anionic and nonionic water-soluble polymers and anionic, nonionic and amphoteric surfactants.
Invention 2 is the dispersion composition according to Invention 1, wherein a) the urea urethane compound is at least one of the compounds represented by any of the following formulas (I) to (VI).
[0009]
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[0010]
(Here, X, Y, and Z each represent an aromatic compound residue, a heterocyclic compound residue, or an aliphatic compound residue. Each residue may have a substituent.)
[0011]
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[0012]
(X and Y represent an aromatic compound residue, a heterocyclic compound residue, or an aliphatic compound residue. Each residue may have a substituent.)
[0013]
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[0014]
(Where X and Y represent an aromatic compound residue, a heterocyclic compound residue, or an aliphatic compound residue. Α represents a residue having a valence of 2 or more, and n represents an integer of 2 or more. And each residue may have a substituent.)
[0015]
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[0016]
(Where Z and Y represent an aromatic compound residue, a heterocyclic compound residue, or an aliphatic compound residue. Β represents a residue having a valence of 2 or more, and n represents an integer of 2 or more. And each residue may have a substituent.)
[0017]
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[0018]
(Here, the hydrogen atom of the benzene ring may be substituted with an aromatic compound residue, an aliphatic compound residue, or a heterocyclic compound residue. Each residue may have a substituent. γ is -SO 2 -, -O-,-(S) n -,-(CH 2 ) n -, -CO-, -CONH-, any one of the formulas (a),
[0019]
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[0020]
Or it shows the case where it does not exist. n is 1 or 2. )
[0021]
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[0022]
(Here, the hydrogen atom of the benzene ring may be substituted with an aromatic compound residue, an aliphatic compound residue, or a heterocyclic compound residue. Each residue may have a substituent. δ is -SO 2 -, -O-,-(S) n -,-(CH 2 ) n -, -CO-, -CONH-, -NH-, -CH (COOR 1 )-, -C (CF 3 ) 2 -, -CR 2 R 3 Indicates either-or does not exist. R 1 , R 2 , R 3 Represents an alkyl group, and n is 1 or 2. )
[0023]
Invention 3 is the dispersion composition of invention 2, wherein component b) is one or more compounds selected from anionic and nonionic water-soluble polymers, and anionic surfactants.
Invention 4 is the dispersion composition of invention 2, wherein component b) is one or more compounds selected from anionic and nonionic water-soluble polymers and anionic surfactants.
Invention 5 is characterized in that the cellulose derivative is hydroxypropylmethylcellulose, the aromatic sulfonic acid derivative is a sodium salt of a naphthalenesulfonic acid formalin condensate, and the polycarboxylic acid derivative is a polycarboxylic acid type. Is a dispersion composition.
[0024]
Invention 6 is the dispersion composition according to any one of Inventions 1 to 5, wherein one or more water-soluble polymers and one or more surfactants are used in combination as component a).
Invention 7 relates to a composition containing one or more compounds selected from colorless and light-colored dye precursors, and a composition containing a urea urethane compound, using either or both compositions with the component b). A method for producing a dispersion composition according to any one of Inventions 1 to 6, wherein the dispersion composition is dispersed.
Invention 8 heat-treats only one of the composition containing at least one compound selected from colorless and light-colored dye precursors or the composition containing a urea urethane compound at 40 ° C. or more for 3 hours or more. After that, the two compositions are mixed, or a method for producing the dispersion composition of the seventh aspect.
[0025]
Invention 9 provides a composition containing one or more compounds selected from colorless and light-colored dye precursors, and a composition containing a urea urethane compound, which are individually heat-treated at 40 ° C. or more for 3 hours or more, and then mixed. 20 is a method for producing the dispersion composition of Invention 7.
Invention 10 is a recording material in which a color-forming layer containing the dispersion composition according to any one of Inventions 1 to 6 or the dispersion composition produced according to any one of Inventions 7 to 9 is provided on a support.
Invention 11 is the recording material according to Invention 10, wherein the recording material is a thermosensitive recording material.
[0026]
Hereinafter, the present invention will be described in detail.
The urea urethane compound according to the present invention refers to a compound in which at least one urea group (—NHCONH—) and at least one urethane group (—NHCOO—) are present in the molecule.
The urea urethane compound according to the present invention may be any compound as long as it has a urea group (—NHCONH— group) and a urethane group (—NHCOO— group) in the molecule, and preferably has formulas (I) to (VI). ) Is a urea urethane compound represented by any one of the above. More preferably, it is an aromatic compound or a heterocyclic compound. More preferably, in addition to a urea group (-NHCONH- group) and a urethane group (-NHCOO- group), a sulfone group (-SO2- group) or an anilide group (-NHCO- group) is directly bonded to the urea group in the molecule. It is desirable to be present without any. The details of these urea urethane compounds are described in, for example, International Publication No. WO 00/14058, and can be synthesized according to the method described therein.
[0027]
The urea urethane compounds represented by the formulas (I) to (VI) according to the present invention are compounds obtained according to, for example, the following synthesis examples.
The urea urethane compound of the formula (I) is obtained by, for example, converting an OH group-containing compound of the general formula (VII), an isocyanate compound of the general formula (VIII) and an amine compound of the general formula (IX) into the following reaction formula (A) Therefore, it can be obtained by reacting.
[0028]
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[0029]
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[0030]
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[0031]
(Here, X, Y, and Z each represent an aromatic compound residue, a heterocyclic compound residue, or an aliphatic compound residue. Each residue may have a substituent.)
[0032]
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[0033]
The urea urethane compound of the formula (II) is obtained, for example, by reacting an OH group-containing compound of the general formula (VII) with an isocyanate compound of the general formula (VIII) and water according to the following reaction formula (B). Can be.
[0034]
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[0035]
The urea urethane compound of the formula (III) is obtained by, for example, converting an OH group-containing compound of the general formula (VII), an isocyanate compound of the general formula (VIII) and an amine compound of the general formula (X) into the following reaction formula (C). Therefore, it can be obtained by reacting.
[0036]
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[0037]
(Here, α represents a residue having a valence of 2 or more, and n represents an integer of 2 or more.)
[0038]
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[0039]
The urea urethane compound of the formula (IV) is obtained by, for example, converting an amine compound of the general formula (IX), an isocyanate compound of the general formula (VIII) and an OH group-containing compound of the general formula (XI) into the following reaction formula (D). Therefore, it can be obtained by reacting.
[0040]
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[0041]
(Here, β represents a residue having a valence of 2 or more, and n represents an integer of 2 or more.)
[0042]
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[0043]
The ureaurethane compound of the formula (V) can be obtained, for example, by reacting a monophenol compound with a diisocyanatophenyl compound and a diamine compound of the general formula (XII) according to the following reaction formula (E).
[0044]
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[0045]
(Here, the hydrogen atom of the benzene ring may be substituted with an aromatic compound residue, an aliphatic compound residue, or a heterocyclic compound residue. Each residue may have a substituent. γ is -SO 2 -, -O-,-(S) n -,-(CH 2 ) n -, -CO-, -CONH-, any one of the formulas (a),
[0046]
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[0047]
Or it shows the case where it does not exist. n is 1 or 2. )
[0048]
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[0049]
The urea urethane compound of the formula (VI) can be obtained, for example, by reacting an aniline derivative with a diisocyanatophenyl compound and a dihydroxy compound of the general formula (XIII) according to the following reaction formula (F).
[0050]
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[0051]
(Here, the hydrogen atom of the benzene ring may be substituted with an aromatic compound residue, an aliphatic compound residue, or a heterocyclic compound residue. Each residue may have a substituent. δ is -SO 2 -, -O-,-(S) n -,-(CH 2 ) n -, -CO-, -CONH-, -NH-, -CH (COOR 1 )-, -C (CF 3 ) 2 -, -CR 2 R 3 Indicates either-or does not exist. R 1 , R 2 , R 3 Represents an alkyl group, and n is 1 or 2. )
[0052]
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[0053]
Among these urea urethane compounds of the formulas (I) to (VI), preferred are the compounds of the formulas (II) to (IV), and particularly preferred are the compounds of the formula (V).
The ureaurethane compound according to the present invention is a colorless or pale-colored compound which is usually a solid at room temperature, and preferably has a molecular weight of 5,000 or less, more preferably 2,000 or less.
[0054]
In the heat-sensitive recording material, a compound having a melting point is preferable, and the melting point is preferably in the range of 40 ° C to 500 ° C, particularly preferably in the range of 60 ° C to 300 ° C.
In preparing the dispersion composition, one kind of the urea urethane compound may be used, or two or more kinds thereof may be used in combination as needed.
The leuco dye used as an example of the colorless or light-colored dye precursor used in preparing the dispersion composition of the present invention is a known compound already used in pressure-sensitive recording materials and heat-sensitive recording materials, and is particularly limited. However, for example, the following may be mentioned.
[0055]
(1) Triarylmethane compounds
3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide (crystal violet lactone), 3,3-bis (p-dimethylaminophenyl) phthalide, 3- (p-dimethylaminophenyl) -3 -(1,2-dimethylindol-3-yl) phthalide, 3- (p-dimethylaminophenyl) -3- (2-methylindol-3-yl) phthalide, 3- (p-dimethylaminophenyl) -3 -(2-phenylindol-3-yl) phthalide, 3,3-bis (1,2-dimethylindol-3-yl) -5-dimethylaminophthalide, 3,3-bis (1,2-dimethylindole -3-yl) -6-dimethylaminophthalide, 3,3-bis (9-ethylcarbazol-3-yl) -5-dimethylaminophthalide, 3,3 -Bis (2-phenylindol-3-yl) -5-dimethylaminophthalide, 3-p-dimethylaminophenyl-3- (1-methylpyrrol-2-yl) -6-dimethylaminophthalide and the like.
[0056]
(2) Diphenylmethane compounds
4,4-bis-dimethylaminophenylbenzhydryl benzyl ether, N-halophenyl leuco auramine, N-2,4,5-trichlorophenyl leuco auramine and the like.
[0057]
(3) Xanthene compounds
Rhodamine B anilinolactam, rhodamine Bp-chloroanilinolactam, 3-diethylamino-7-dibenzylaminofluoran, 3-diethylamino-7-octylaminofluoran, 3-diethylamino-7-phenylfluoran, 3 -Diethylamino-7-chlorofluoran, 3-diethylamino-6-chloro-7-methylfluoran, 3-diethylamino-7- (3,4-dichloroanilino) fluoran, 3-diethylamino-7- (2-chloroanilino ) Fluorane, 3-diethylamino-6-methyl-7-anilinofluoran, 3- (N-ethyl-N-tolyl) amino-6-methyl-7-anilinofluoran, 3-piperidino-6-methyl- 7-anilinofluoran, 3- (N-ethyl-N-tolyl) amino-6-methyl 7-phenethylfluoran, 3-diethylamino-7- (4-nitroanilino) fluoran, 3-dibutylamino-6-methyl-7-anilinofluoran, 3- (N-methyl-N-propyl) amino-6 Methyl-7-anilinofluoran, 3- (N-ethyl-N-isoamyl) amino-6-methyl-7-anilinofluoran, 3- (N-methyl-N-cyclohexyl) amino-6-methyl- 7-anilinofluoran, 3- (N-ethyl-N-tetrahydrofuryl) amino-6-methyl-7-anilinofluoran and the like.
[0058]
(4) Thiazine compounds
Benzoyl leucomethylene blue, p-nitrobenzoyl leucomethylene blue and the like.
(5) Spiro compounds
3-methylspirodinaphthopyran, 3-ethylspirodinaphthopyran, 3,3-dichlorospirodinaphthopyran, 3-benzylspirodinaphthopyran, 3-methylnaphtho- (3-methoxybenzo) spiropyran, 3-propylspiro Benzopyran and the like.
[0059]
Also, 3,6-bis (dimethylamino) fluorene-9-spiro-3 ′-(6′-dimethylaminophthalide), 3-diethylamino-6-dimethylaminofluorene-9-spiro-3 ′-(6 ′ -Dimethylaminophthalide), 3,6-bis (diethylamino) fluorene-9-spiro-3 ′-(6′-dimethylaminophthalide), 3-dibutylamino-6-dimethylaminofluorene-9-spiro-3 '-(6'-dimethylaminophthalide), 3-dibutylamino-6-diethylaminofluorene-9-spiro-3'-(6'-dimethylaminophthalide), 3,6-bis (dimethylamino) fluorene- 9-spiro-3 '-(6'-diethylaminophthalide), 3-diethylamino-6-dimethylaminofluorene-9-spiro-3'-(6'-diethylamino Talide), 3-dibutylamino-6-dimethylaminofluorene-9-spiro-3 ′-(6′-diethylaminophthalide), 3,6-bis (diethylamino) fluorene-9-spiro-3 ′-(6 ′ -Diethylaminophthalide), 3,6-bis (dimethylamino) fluorene-9-spiro-3 '-(6'-dibutylaminophthalide), 3-dibutylamino-6-diethylaminofluorene-9-spiro-3'-(6'-diethylaminophthalide), 3-diethylamino-6-dimethylaminofluorene-9-spiro-3 '-(6'-dibutylaminophthalide), 3,3-bis [2- (4-dimethylamino Phenyl) -2- (4-methoxyphenyl) ethenyl] -4,5,6,7, -tetrachlorophthalide and the like having a near infrared absorption region.
[0060]
The urea urethane compound is preferably used in an amount of 5 to 500% by mass, more preferably 20 to 300% by mass, based on the colorless or pale color dye precursor. When the urea urethane compound is at least 5% by mass, it is sufficient to develop the color of the dye precursor, and the coloring density is high. Also, the urea urethane compound is economically preferable because an excess amount of the urea urethane compound hardly remains at 500 mass% or less.
In preparing the dispersion composition, one kind of the colorless or light-colored dye precursor may be used, or two or more kinds thereof may be used in combination as needed.
[0061]
The dispersant which is an essential processing agent used for preparing each dispersion of the urea urethane compound and / or the colorless or pale color dye precursor used as the color developer used in the dispersion composition of the present invention is a water-soluble polymer and Selected from surfactants. Specific examples of these dispersants are described below. Specific examples of the water-soluble polymer include, for example, PVA, sulfonic acid-modified PVA, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyethylene oxide, polypropylene oxide, polyvinylpyrrolidone, and copolymers thereof. Synthetic polymers, cellulose-based polymers such as methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose sodium salt and the like can be mentioned. As specific examples of the surfactant, anionic surfactants include fatty acid salts, alkyl sulfate salts, alkyl sulfosuccinate salts, alkyl phosphate salts, polyoxyethylene alkyl sulfate salts, and polyoxyethylene alkyl allyl sulfate salts. Salts, aromatic sulfonic acid derivatives (eg, alkylbenzene sulfonic acid salts, alkyl diphenyl ether disulfonic acid salts, alkyl naphthalene sulfonic acid salts, naphthalene sulfonic acid formalin condensate salts), polycarboxylic acid derivatives (eg, containing various carboxyl groups) Polymerization or copolymerization of monomers, or mixtures thereof), polyoxyethylene alkyl phosphates, and the like, and nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl. D Tere, oxyethylene / oxypropylene block copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerin fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene alkylamine, alkylalkanolamide. Examples of the amphoteric surfactant include alkyl betaine, amine oxide, imidazolinium betaine, other polyoxyethylene alkyl ether triethanolamine sulfate (for example, Emal 20T, manufactured by Kao), and reactive anionic surfactant (for example, latemul). S-180, latemul S-180A, manufactured by Kao) and special polymer surfactants (for example, homogenol L-95, homogenol L-100, manufactured by Kao). It is. Among them, the water-soluble polymer is preferably a cellulose derivative, more preferably hydroxypropylmethylcellulose, and the surfactant is preferably an anionic surfactant, and more preferably an aromatic sulfonic acid derivative and a polycarboxylic acid. Derivatives (e.g., Kao's Demol EP, Poise 520, Poise 521, Poise 530, Homogenol L-18, Homogenol L-1820, Latemul ASK, Daikoh Industries Pharmaceutical Discoat N-14) are preferred, and aromatic sulfonic acids are preferred. As for the derivative, more preferably, a salt of a naphthalenesulfonic acid formalin condensate (for example, Demol N, Demol RN, Demol T, Demol NL, Demol RN-L, Demol MS, Demol SN-B, Demol C, Demol of Kao products) SS-L, Demol A like C-30), it has excellent moisture background fog effect of improving whiteness lowering improving effect, and / or recording materials of the dispersion composition. These dispersants may be used alone or in combination of two or more kinds. If necessary, a conventional water-soluble polymer other than the dispersant specified in the present application, an anionic surfactant, a nonionic surfactant Agents, cationic surfactants and amphoteric surfactants such as alkylamine salts, quaternary ammonium salts and amine oxides. Particularly, a combined use of a dispersant selected from cellulose derivatives and a salt of a naphthalenesulfonic acid formalin condensate and a dispersant selected from polycarboxylic acid derivatives among water-soluble polymers exhibits excellent effects.
[0062]
The use ratio of the dispersant specified in the present application is determined based on the colorless or pale color dye precursor or the urea urethane compound from the viewpoint of the effect of improving the reduction in whiteness of the dispersion composition and / or the effect of improving the wet coverage of the recording material. It is preferably used in an amount of 0.5 to 50% by mass, more preferably 1 to 20% by mass, and still more preferably 5 to 15% by mass.
[0063]
The method for preparing the dispersion composition of the present invention is performed, for example, as follows. The urea urethane compound is preliminarily dispersed in an aqueous solution together with a water-soluble polymer having a dispersing ability and an anionic surfactant, and the predispersion is optionally used in a paint shaker, a ball mill, a vibration ball mill, an attritor. The urea urethane compound dispersion is adjusted by pulverizing the mixture with a pulverizer such as a sand mill, a dyno mill, a colloid mill, a sand grinder or the like to an appropriate particle size. When preparing a colorless or light color dye precursor dispersion, the same preliminary dispersion is performed, and the colorless or light color dye precursor dispersion is prepared by pulverizing the dispersion to an appropriate particle size with a pulverizer.
[0064]
The dispersion of the urea urethane compound and the dispersion of the dye precursor may or may not be subjected to a heat treatment, but the heat treatment further improves the whiteness and the wet land coverage. The heat treatment at this time is preferably performed at 40 ° C. or more for 3 hours or more. More preferably, heat treatment is performed at an appropriate temperature between 40 ° C. and 70 ° C. for 3 hours or more. More preferably, the heat treatment is performed at 40 ° C. for 12 hours or more, and at 60 ° C. for 6 hours or more. When the temperature is less than 3 hours at 40 ° C., the effect of improving the whiteness of each dispersion by the heat treatment is small. When heat treatment is performed at 70 ° C. or higher, the stability of the dispersion may be impaired. The method of heat treatment is not particularly limited, but usually, the dispersion is placed in a container, heated, and stirred with a stirring blade.
[0065]
The dispersion composition of the present invention is prepared by mixing the urea urethane compound dispersion and the dye precursor dispersion in an appropriate ratio.
The dispersion composition of the present invention is generally a dispersion of a colorless or pale-colored dye precursor, a urea urethane compound dispersion as a developer, and, if necessary, a developer other than the urea urethane compound, and sensitization. It is prepared using a dispersion of an agent or a pigment as an optional component.
[0066]
In preparing the dispersion composition of the present invention, known optional additives are effectively used as necessary. These are described below.
In order to improve the color development sensitivity of the dispersion composition of the present invention, a heat fusible substance can be contained in the dispersion composition. The heat-fusible substance preferably has a melting point of 60C to 180C, and particularly preferably has a melting point of 80C to 140C. For example, stearamide, palmitamide, N-methylol stearamide, β-naphthylbenzyl ether, N-stearyl urea, N, N′-distearyl urea, β-naphthoic acid phenyl ester, 1-hydroxy-2- Naphthoic acid phenyl ester, β-naphthol (p-methylbenzyl) ether, 1,4-dimethoxynaphthalene, 1-methoxy-4-benzyloxynaphthalene, N-stearoylurea, p-benzylbiphenyl, 1,2-di (m -Methylphenoxy) ethane, 1-phenoxy-2- (4-chlorophenoxy) ethane, 1,4-butanediol phenyl ether, dimethyl terephthalate, metaterphenyl, dibenzyl oxalate, oxalic acid (Pchlorobenzyl) ester, 4 -Hydroxybenzoic acid Butyl, benzyl 4-hydroxybenzoate, 4-hydroxybenzoic acid (4′-chlorobenzyl), 1,2-bis (4′-hydroxybenzoic acid) ethyl, 1,5-bis (4′-hydroxybenzoic acid) Pentyl, 1,6-bis (4'-hydroxybenzoic acid) hexyl and the like. Furthermore, 4,4'-dimethoxybenzophenone, 4,4'-dichlorobenzophenone, 4,4'-difluorobenzophenone, diphenylsulfone, 4,4'-dichlorodiphenylsulfone, 4,4'-difluorodiphenylsulfone, 4,4 '-Dichlorodiphenyl disulfide, diphenylamine, 2-methyl-4-methoxydiphenylamine, N, N'-diphenyl-p-phenylenediamine, 1- (N-phenylamino) naphthalene, benzyl, 1,3-diphenyl-1, 3-propanedione or the like may be used.
[0067]
The heat fusible substance may be used alone or as a mixture of two or more kinds, and in order to obtain a sufficient heat responsiveness, 10 to 500 mass with respect to a colorless or pale color dye precursor. %, More preferably 20 to 300% by mass.
In the dispersion composition of the present invention, by further adding an acidic developer, the coloring sensitivity is improved, and a dispersion composition having clear coloring performance can be obtained.
[0068]
The acidic developer to be further added to the dispersion composition of the present invention is a commonly used electron-accepting substance, such as a phenol derivative, an aromatic carboxylic acid derivative or a metal compound thereof, a salicylic acid derivative or a metal salt thereof. , N, N-diarylthiourea derivatives, sulfonylurea derivatives and the like are preferred. Particularly preferred are phenol derivatives, specifically, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (hydroxyphenyl) butane, 2,2-bis (hydroxyphenyl) pentane, , 2-Bis (hydroxyphenyl) heptane, 1,1-bis (4-hydroxyphenyl) cyclohexane, butyl bis (4-hydroxyphenyl) acetate, benzyl bis (4-hydroxyphenyl) acetate, bis (4-hydroxyphenyl) Sulfone, bis (3-methyl-4-hydroxyphenyl) sulfone, 4-hydroxyphenyl-4′-methylphenylsulfone, 3-chloro-4-hydroxyphenyl-4′-methylphenylsulfone, 3,4-dihydroxyphenyl- 4'-methylphenylsulfone, 4-isopropylphenyl- '-Hydroxyphenylsulfone, 4-isopropyloxyphenyl-4'-hydroxyphenylsulfone, bis (2-allyl-4-hydroxyphenyl) sulfone, 4-hydroxyphenyl-4'-benzyloxyphenylsulfone, 4-isopropylphenyl- 4'-hydroxyphenylsulfone, bis (2-methyl-3-tert.-butyl-4-hydroxyphenyl) sulfide, methyl 4-hydroxybenzoate, benzyl 4-hydroxybenzoate, 4-hydroxybenzoic acid (4'- Chlorobenzyl), 1,2-bis (4'-hydroxybenzoic acid) ethyl, 1,5-bis (4'-hydroxybenzoic acid) pentyl, 1,6-bis (4'-hydroxybenzoic acid) hexyl, -Dimethyl hydroxyphthalate, stearyl gallate, lauryl gallate And the like. Examples of the salicylic acid derivatives include methyl salicylate, ethyl salicylate, isoamyl salicylate, isopentyl salicylate, phenyl salicylate, benzyl salicylate, 4-n-octyloxysalicylic acid, 4-n-butyloxysalicylic acid, 4-n-pentyloxysalicylic acid, and 3-n -Dodecyloxysalicylic acid, 3-n-octoctanoyloxysalicylic acid, 4-n-octyloxycarbonylaminosalicylic acid, 4-n-octanoyloxycarbonylaminosalicylic acid, salicylamide, salicylanilide and the like. Examples of the sulfonylurea derivative include 4,4-bis (p-toluenesulfonylaminocarbonylamino) diphenylmethane and 4,4-bis (o-toluenesulfonylaminocarbonylamino) diphenylmethane 4,4-bis (p-toluenesulfonylaminocarbonyl) Compounds containing one or more arylsulfonylaminoureido groups such as amino) diphenylsulfide, 4,4-bis (p-toluenesulfonylaminocarbonylamino) diphenylether, N- (p-toluenesulfonyl) -N′-phenylurea Can be
[0069]
The acid developer is preferably used in an amount of 5 to 500% by mass, more preferably 20 to 300% by mass, based on the colorless or pale color dye precursor. When the amount of the acidic developer is 5% by mass or more, the coloring of the dye precursor is good, and the coloring density is high. When the amount of the acidic developer is 500% by mass or less, the acidic developer hardly remains, which is economically advantageous and preferable.
Preservability is improved by further adding an isocyanate compound to the dispersion composition of the present invention. The isocyanate compound that can be added to the dispersion composition of the present invention is a colorless or pale-colored aromatic isocyanate compound or heterocyclic isocyanate compound which is a solid at room temperature, and is, for example, an isocyanate compound described in International Publication No. WO00 / 14058. One or more of the above can be added. These isocyanates may be used, if necessary, in the form of so-called block isocyanates, which are addition compounds with phenols, lactams, oximes, etc., and diisocyanate dimers such as 1- It may be used in the form of isocyanurate, which is a dimer or trimer of methylbenzene-2,4-diisocyanate, or may be used as a polyisocyanate adducted with various polyols or the like. is there. Also, water adduct isocyanates such as 2,4-toluene diisocyanate, diphenylmethane diisocyanate, phenol adduct isocyanate, amine adduct isocyanate, etc. are described in Japanese Patent Application Nos. 8-225445 and 8-250623. The isocyanate compound and the isocyanate adduct compound described in this document may be used.
[0070]
The isocyanate compound is preferably used in an amount of 5 to 500% by mass, more preferably 20 to 200% by mass, based on the colorless or pale color dye precursor. When the amount of the isocyanate compound is 5% by mass or more, the effect of improving the storage stability is sufficient, and the coloring density is high. When the content of the isocyanate compound is 500% by mass or less, an excess of the isocyanate compound hardly remains, which is economically advantageous and preferable.
In addition, storage stability is further improved by adding an imino compound to the dispersion composition of the present invention.
[0071]
The imino compound that can be added to the dispersion composition of the present invention is a room-temperature solid colorless or light-colored compound having at least one imino group, and two or more imino compounds can be used in combination depending on the purpose. is there. Specific examples thereof include those described in International Publication No. WO00 / 14058.
Among these, an iminoisoindoline derivative is particularly preferable, and 1,3-diimino-4,5,6,7-tetrachloroisoindoline and 3-imino-4,5,6,7-tetrachloroisoindoline- 1-one, 1,3-diimino-4,5,6,7-tetrabromoisoindoline are preferred.
[0072]
The imino compound is preferably used in an amount of 5 to 500% by mass, more preferably 20 to 200% by mass, based on the colorless or pale color dye precursor. When the amount of the imino compound is 5% by mass or more, the effect of improving storage stability is exhibited. In addition, when the imino compound content is 500% by mass or less, excess imino compound hardly remains, which is economically advantageous and preferable.
[0073]
Further, by adding an amino compound to the dispersion composition of the present invention, the storability of the background and printing can be improved. The amino compound that can be added is a colorless or pale-colored substance having at least one primary, secondary, or tertiary amino group, for example, as described in International Publication No. WO00 / 14058. An aniline derivative, a heterocyclic compound, a hindered amine compound, etc. are mentioned.
The amino compound may be used alone or as a mixture of two or more kinds. In order to improve the print preservability in the plasticizer resistance, 1 to 500% by mass of the colorless or pale color dye precursor is used. It is preferable that When the content of the amino compound is 1% by mass or more with respect to the urea urethane compound, improvement in print preservability can be obtained. Further, if it is used at 500 mass% or less, the performance is sufficiently improved and the cost is advantageous.
[0074]
Furthermore, in order to improve the background fogging and the heat responsiveness, N-stearyl-N ′-(2-hydroxyphenyl) urea, N-stearyl-N ′-(3-hydroxyphenyl) urea, N-stearyl-N '-(4-hydroxyphenyl) urea, p-stearoylaminophenol, o-stearoylaminophenol, p-lauroylaminophenol, p-butyrylaminophenol, m-acetylaminophenol, o-acetylaminophenol, p-acetyl Aminophenol, o-butylaminocarbonylphenol, o-stearylaminocarbonylphenol, p-stearylaminocarbonylphenol, 1,1,3-tris (3-tert.-butyl-4-hydroxy-6-methylphenyl) butane, 1,1,3-tris (3-te t-butyl-4-hydroxy-6-ethylphenyl) butane, 1,1,3-tris (3,5-di-tert.-butyl-4-hydroxyphenyl) butane, 1,1,3-tris ( 3-tert.-butyl-4-hydroxy-6-methylphenyl) propane, 1,2,3-tris (3-tert.-butyl-4-hydroxy-6-methylphenyl) butane, 1,1,3- Tris (3-phenyl-4-hydroxyphenyl) butane, 1,1,3-tris (3-cyclohexyl-4-hydroxy-5-methylphenyl) butane, 1,1,3-tris (3-cyclohexyl-4-) Hydroxy-6-methylphenyl) butane, 1,1,3-tetra (3-phenyl-4-hydroxyphenyl) propane, 1,1,3,3-tetra (3-cyclohexyl 4-hydroxy-6-methylphenyl) propane, 1,1-bis (3-tert.-butyl-4-hydroxy-6-methylphenyl) butane, 1,1-bis (3-cyclohexyl-4-hydroxy-6) It is also possible to add phenolic compounds such as-(methylphenyl) butane.
[0075]
A recording material can be obtained by forming a color-forming layer on any support by a method such as coating with a coating liquid containing the dispersion composition of the present invention. The configuration differs depending on the type of recording material.
The dispersion composition of the present invention can be used as various recording materials such as a heat-sensitive recording material and a pressure-sensitive recording material, and is particularly suitable as a heat-sensitive recording material.
When the recording material is a heat-sensitive recording material, it is necessary to provide a heat-sensitive recording layer for heating and coloring on a support. Specifically, the above urea urethane compound, a colorless or pale-colored dye precursor such as a leuco dye, a dispersion composition containing a heat-fusible substance, and other components necessary for forming a heat-sensitive recording layer are dispersed. It is prepared as a body and mixed to prepare a coating solution, and the coating solution is further coated on a support to form a heat-sensitive recording layer. Each dispersion is prepared by finely mixing one or more kinds selected from the various compounds mentioned above in an aqueous solution containing a compound having a dispersing ability such as a water-soluble polymer or a surfactant by a sand grinder or the like. Obtained by grinding. Here, it is essential to use at least one of the dispersants specified in the present invention for one or both of the urea urethane compound and the colorless or pale color dye precursor, and the particle size of each dispersion is 0.1%. The thickness is preferably about 10 μm to about 1 μm.
[0076]
Other components necessary for forming the heat-sensitive recording layer include the following.
As the pigment, for example, diatomaceous earth, talc, kaolin, calcined kaolin, calcium carbonate, magnesium carbonate, titanium oxide, zinc oxide, silicon oxide, aluminum hydroxide, urea-formalin resin and the like can be contained. For the purpose of preventing head abrasion and preventing sticking, higher fatty acid metal salts such as zinc stearate and calcium stearate, waxes such as paraffin, paraffin oxide, polyethylene, polyethylene oxide, stearic amide, caster wax, and dioctyl. A dispersing agent such as sodium sulfosuccinate, a benzophenone-based or benzotriazole-based ultraviolet absorber, an image preservative, a fading inhibitor, a surfactant, a fluorescent dye, and the like can be contained as necessary.
[0077]
Examples of the binder that can be used for forming the heat-sensitive recording layer include starches, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, polyvinyl alcohol, modified polyvinyl alcohol, sodium polyacrylate, and acrylamide / acrylate copolymer. Water-soluble binders such as acrylamide / acrylic acid ester / methacrylic acid terpolymer, alkali salt of styrene / maleic anhydride copolymer, alkali salt of ethylene / maleic anhydride copolymer, and styrene / butadiene copolymer. Latex-based water-insoluble binders such as polymers, acrylonitrile / butadiene copolymers, and methyl acrylate / butadiene copolymers, and the like are included.
[0078]
Paper is mainly used as a support for the heat-sensitive recording layer. In addition to paper, various woven fabrics, non-woven fabrics, synthetic resin films, laminated paper, synthetic paper, metal foil, or composite sheets obtained by combining these are used according to the purpose. Can be used arbitrarily. The thermal recording layer may be composed of a single layer or a plurality of layers. For example, each color forming component may be contained one layer at a time to form a multilayer structure. Further, a protective layer consisting of one or more layers may be provided on the heat-sensitive recording layer, or an intermediate layer consisting of one or more layers may be provided between the support and the heat-sensitive recording layer. Good. This heat-sensitive recording layer can be obtained by mixing each aqueous dispersion obtained by finely pulverizing each color-forming component or other components, a binder and the like, applying the mixture on a support, and drying. The coating amount is 1 to 15 g / m when the coating liquid is dried. 2 Is preferred.
[0079]
When the recording material is a pressure-sensitive recording material, for example, the forms disclosed in U.S. Pat. Nos. 2,505,470, 2,712,507, 2,730,456, 2,730,457, 3,418,250 and the like can be used. Can be taken. That is, the dye precursors are used alone or as a mixture, and synthetic oils such as alkylated naphthalene, alkylated diphenyl, alkylated diphenylmethane, alkylated diarylethane, and chlorinated paraffin, and vegetable oils, animal oils, and mineral oils are used alone. Alternatively, an upper paper obtained by dissolving in a solvent composed of a mixture and dispersing the same in a binder, or by applying a dispersion liquid contained in microcapsules together with a binder or the like on a support, and a urea urethane compound (and Pressure-sensitive recording paper with the coated surfaces of the lower paper coated with a dispersion of an amino compound and / or a developer) or a dispersion of a urea urethane compound on one surface and a dye precursor on the other surface Pressure-sensitive recording paper with the medium coated with the body sandwiched between the upper paper and the lower paper, or the same A self-type in which a dispersion composition containing the above urea urethane compound and (and an amino compound or / and a developer) and a dispersion composition containing the above-mentioned dye precursor, or a multi-layer coating, or a dye precursor, Various forms such as a self-type in which both the urea urethane compound and (and the amino compound and / or the developer) are microencapsulated and mixed and applied are possible.
[0080]
Also when the dispersion composition of the present invention is used as a pressure-sensitive recording material, the addition of an acidic developer improves the image density and enables a clear color-developing pressure-sensitive recording material to be obtained.
As the acidic developer, an electron-accepting substance is also used. Examples thereof include acidic clay, activated clay, attapulgite, benite, zeolite, colloidal silica, magnesium silicate, talc, and aluminum silicate. Inorganic compounds, or phenol, cresol, butylphenol, octylphenol, phenylphenol, chlorophenol, salicylic acid, or aldehyde condensed novolak resins derived therefrom and their metal salts, 3-isopropylsalicylic acid, 3-phenylsalicylic acid, 3-cyclohexylsalicylic acid 3,5-di-t-butylsalicylic acid, 3,5-di (α-methylbenzyl) salicylic acid, 3,5-di-t-octylsalicylic acid, 3-methyl-5-benzylsalicylic acid, 3,5-di (Α, α- Methylbenzyl) salicylic acid, 3-phenyl-5-(alpha, alpha-dimethylbenzyl) salicylic acid derivatives and metal salts thereof, such as salicylic acid and the like.
[0081]
Further, in the recording material according to the present invention, an ultraviolet absorber represented by a hindered phenol compound, an image preservative, an anti-fading agent, a light stabilizer and the like may be contained in the recording layer. For example, 1,1,3-tris (3′-cyclohexyl-4′-hydroxyphenyl) butane, 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane, 1,1,3 -Tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, tris (2,6-dimethyl-4-tert-butyl-3-hydroxybenzyl) isocyanurate, 4,4'-thiobis (3- Methyl-6-tert-butylphenol), 4,4′-butylidenebis (3-methyl-6-tert-butylphenyl), 1,3,5-trimethyl-2,4,6-tris (3,5-di- (tert-butyl-4-hydroxybenzyl) benzene, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, p-octylphenyl salicylate , 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, ethyl-2-cyano-3,3'-diphenylacrylate, tetra (2,2,6,6-tetramethyl-4-piperidyl) 1 , 2,3,4-butanetetracarboate, sodium-2,2'-methylenebis (4,6-di-tert-butylphenyl) phosphite and the like.
[0082]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in more detail by way of examples.
In addition, each physical property was evaluated by the following methods.
<Wetland resistance>
Print on thermal recording paper with 24V applied pressure and 1.5 msec pulse width, leave the sample for 24 hours in a 40 ° C. × 90% RH atmosphere, and measure the optical density of the unprinted portion (background) with a Macbeth densitometer RD918. Was evaluated. In the evaluation, a material having a low OD value (a material having a high whiteness) was regarded as having good wetland covering property.
Evaluation criteria of OD value ◎: less than 0.07, :: 0.07 or more and less than 0.1, Δ: 0.1 or more and less than 0.15, x: 0.15 or more and less than 0.20, xx: 0. 20 or more
[0083]
<Measurement of whiteness of dispersion composition>
5 g of a dye dispersion (10% by weight of dye) and 5 g of a developer dispersion (20% by weight of developer) are mixed, and the whiteness of the mixed dispersion (dispersion composition) is measured by a touch panel color computer. It was measured by SM-T (manufactured by Suga Test Instruments). This mixed dispersion was evaluated by measuring the whiteness again after standing for 3 hours at 40 ° C. for accelerating the coloring phenomenon, and calculating the difference in whiteness before and after the heat treatment (Δ whiteness value).
Evaluation criteria of Δ whiteness :: less than 5, :: 5 or more and less than 7, Δ: 7 or more and less than 15, X: 15 or more and less than 20, XX: 20 or more
[0084]
<Measurement of particle size distribution>
The average particle size was measured by SALD-7000 LASER DIFFRACTION PARTICLE SIZE ANALYZER (manufactured by Shimadzu Corporation).
Production Example 1 (Synthesis of urea urethane compound)
To 105.6 g of 2,4-toluene diisocyanate and 68.4 g of phenol, 112.4 g of ethyl acetate was added as a solvent. When the first-stage reaction was completed in 1 hour while adding 9,41 g of 4,4'-diaminodiphenylsulfone in eight portions, the reaction solution became a white slurry. Next, the reaction mixture was diluted by adding 361.8 g of ethyl acetate. While the temperature of the diluted reaction mixture was raised from 30 ° C. to 60 ° C. at 10 ° C./h, 18.1 g of a 0.375 wt% triethylamine solution in ethyl acetate was added over 30 minutes. After reaching 60 ° C., the reaction was continued at 60 ° C. for another 15 hours. The reaction mixture was cooled from 60 ° C. to 30 ° C., 15.8 g of 2,4-toluene diisocyanate was added, and the mixture was stirred at 30 ° C. for 1 hour to terminate the reaction. Next, ethyl acetate was removed under reduced pressure, and the resultant was dried under reduced pressure at 65 ° C. and about 130 torr for 8 hours under a nitrogen atmosphere, to obtain 265 g of a urea urethane compound having white crystals (hereinafter referred to as UU).
[0085]
Embodiment 1
52.5 g of developer UU, 48.75 g of Metrolose 60SH03 (hydroxypropylmethylcellulose, manufactured by Shin-Etsu Chemical Co., Ltd.) having a solid content of 5.38%, and Demol T (β-naphthalenesulfonic acid formalin condensate having a solid content of 5.38%) 48.75 g of sodium salt (manufactured by Kao) and glass beads (0.6 mm in diameter) are weighed in 150 ml with a measuring cylinder, placed in a 400 ml vessel, crushed and dispersed by a sand grinder (manufactured by Imex Co.) at 2,000 rpm for 3 hours. Thus, 140 g of a UU dispersion having a solid content of 38.5% was obtained. This UU dispersion was placed in a 200-ml flask, heated using a water bath so as to maintain the temperature inside the flask at 60 ° C., and stirred using a three-one motor at 250 rpm for 12 hours to perform a heat treatment. The average particle size of the heat-treated UU dispersion was 0.46 μm.
[0086]
Also, an aqueous solution of Gohselan L3266 (sulfonic acid-modified PVA, manufactured by Nippon Synthetic Chemical) having a dye content of 52.5 g of 3-dibutylamino-6-methyl-7-anilinofluoran (hereinafter referred to as ODB2) and a solid content of 5.38%. 97.5 g and glass beads (φ0.6 mm) were weighed in 150 ml with a measuring cylinder, placed in a 400 ml vessel, crushed and dispersed by a sand grinder (manufactured by Imex Co., Ltd.) at 2,000 rpm for 3 hours, and solidified to 38.5. % ODB2 dispersion was obtained. This ODB2 dispersion was placed in a 200 ml flask, heated using a water bath at 40 ° C. and stirred at 250 rpm for 24 hours using a three-one motor to perform a heat treatment. The average particle size of the heat-treated ODB2 dispersion was 0.49 μm.
[0087]
Further, 52.5 g of a sensitizer diphenylsulfone (hereinafter referred to as DP), 97.5 g of an aqueous solution of Gohselan L3266 (sulfonic acid-modified PVA, manufactured by Nippon Synthetic Chemical Industry) having a solid content of 5.38%, and glass beads (φ0.6 mm) were used. 150 ml was weighed with a measuring cylinder, placed in a 400 ml vessel, crushed and dispersed by a sand grinder (manufactured by Imex Co., Ltd.) at 2,000 rpm for 3 hours to obtain a DP dispersion having a solid content of 38.5%. The average particle size of the obtained DP dispersion was 0.60 μm.
Further, 10 g of calcium carbonate was mixed with 30 g of water, and the mixture was stirred and dispersed with a stirrer to obtain a dispersion.
[0088]
The following procedure was used to evaluate the wet paper's resistance to thermal skin covering.
These dispersions were dried at 30 parts by weight of the UU dispersion, 15 parts by weight of the ODB2 dispersion, 30 parts by weight of the DP dispersion, and 20 parts by weight of the calcium carbonate dispersion. Further, the mixture is stirred and mixed at a ratio of 10 parts by weight of a dry solid content of a zinc stearate dispersion having a solid concentration of 16% by weight and 10 parts by weight of a dry solid content of 15% by weight of polyvinyl alcohol (dry basis). Got.
[0089]
This coating solution was applied on a base paper having a weighing of 50 g / m 2 with a ba coater, dried and treated with a super calender to obtain a thermosensitive recording paper. The coating amount at this time is 0.40 g / m2 in terms of ODB2. 2 Met.
Printing was performed on the heat-sensitive paper thus produced at a load of 24 V with a pulse width of 1.5 msec, and the OD value after standing for 24 hours in an atmosphere of 40 ° C. × 90% RH was evaluated to evaluate the covering property of the wet ground skin. As a result of the measurement, the OD value was as good as 0.06.
[0090]
The whiteness of the dispersion composition was evaluated according to the following procedure.
The ODB2 dispersion was diluted to 10% (% by weight of ODB2), the UU dispersion was diluted to 20% (% by weight of UU), and the content ratio by weight of the two mixed dispersions was ODB2 / UU = 1 /. 2 to prepare an evaluation sample. After measuring the whiteness, it was left at 40 ° C. for 3 hours, the whiteness was measured again, and the difference in whiteness before and after the heat treatment (Δ whiteness) was calculated. As a result, Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0091]
Embodiment 2
Example 1 A dispersion was prepared in the same manner as in Example 1, except that 48.75 g of an aqueous solution of Demol SSL (a sodium salt of a special aromatic sulfonic acid formalin condensate, manufactured by Kao) was used instead of Metrolose 60SH03 as a dispersant when preparing a UU dispersion. The dispersion was prepared and evaluated for thermal paper performance and whiteness of the dispersion composition. The average particle size of the UU dispersion obtained at this time was 0.49 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 2, which was good. The results are summarized in Table 1.
[0092]
Embodiment 3
A dispersion was prepared in the same manner as in Example 1 except that 97.5 g of Metroose 60 SH03 aqueous solution having a solid content of 5.38% was used alone when a UU dispersion was prepared. The whiteness of the composition was evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0093]
Embodiment 4
In Example 3, a dispersion was prepared by the same method except that 97.5 g of an aqueous solution of Demol T having a solid content of 5.38% was used alone as a dispersant when preparing a dispersion of UU. The whiteness of the composition was evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.07 and a Δ whiteness of 6. The results are summarized in Table 1.
[0094]
Embodiment 5
Example 3 is the same as Example 3, except that 97.5 g of an aqueous solution of Demol EP (special polycarboxylic acid type polymer surfactant, manufactured by Kao) having a solid content of 5.38% was used as a dispersant when preparing a UU dispersion. The dispersion was prepared in the same manner as described above, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. The evaluation result of the wetland covering property was good, as the OD value was 0.06 and the Δ whiteness was 4. The results are summarized in Table 1.
[0095]
Embodiment 6
In Example 3, except that 97.5 g of an aqueous solution of Metroose SM15 (methylcellulose, manufactured by Shin-Etsu Chemical Co., Ltd.) having a solid content of 5.38% was used alone when the UU dispersion was prepared, and the UU dispersion was not heat-treated. Prepared a dispersion in the same manner and evaluated thermal paper performance and whiteness of the dispersion composition. The average particle size of the UU dispersion obtained at this time was 0.47 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.06 and a Δ whiteness of 6. The results are summarized in Table 1.
[0096]
Embodiment 7
In the same manner as in Example 3, except that 97.5 g of an aqueous solution of HPC-L (hydroxypropylcellulose, manufactured by Nippon Soda) having a solid content of 5.38% was used alone as a dispersant at the time of preparing a dispersion of UU. Was prepared and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. The evaluation result of the wetland covering property was good, with an OD value of 0.08 and a Δ whiteness of 6. The results are summarized in Table 1.
[0097]
Embodiment 8
In Example 3, the same method was used except that 97.5 g of an aqueous solution of cellogen 6A (sodium salt of carboxymethylcellulose, manufactured by Daiichi Kogyo Seiyaku) having a solid content of 5.38% was used alone as a dispersant at the time of preparing a dispersion of UU. The dispersion was prepared, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. At this time, the average particle size of the obtained UU dispersion was 0.48 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0098]
Embodiment 9
Example 3 is the same as Example 3, except that 97.5 g of an aqueous solution of Kuraray Povar PVA-103 (completely saponified type, polymerization degree 300, manufactured by Kuraray) having a solid content of 5.38% was used alone as a dispersant at the time of preparing a UU dispersion. The dispersion was prepared in the same manner as described above, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.06 and a Δ whiteness of 6. The results are summarized in Table 1.
[0099]
Embodiment 10
In Example 3, 97.5 g of an aqueous solution of a surfactant DKS Discoat N-14 (special polycarboxylic acid NH4 salt, manufactured by Daiichi Kogyo Seiyaku) having a solid content of 5.38% was used alone as a dispersant when preparing a UU dispersion. A dispersion was prepared by the same method except that the dispersion was used, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. The evaluation result of the wetland covering property was good, as the OD value was 0.07 and the Δ whiteness was 8. The results are summarized in Table 1.
[0100]
Embodiment 11
A dispersion was prepared in the same manner as in Example 1 except that BON was used as the sensitizer instead of DP, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the BON dispersion obtained at this time was 0.50 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0101]
Embodiment 12
A dispersion was prepared in the same manner as in Example 1 except that HS3520 was used instead of DP as the sensitizer, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the HS3520 dispersion obtained at this time was 0.53 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0102]
Embodiment 13
A dispersion was prepared in the same manner as in Example 1 except that parabenzylbiphenyl (hereinafter referred to as PBBP) was used instead of DP as a sensitizer, and the thermal paper performance and the whiteness evaluation of the dispersion composition were evaluated. Done. At this time, the average particle size of the obtained PBBP dispersion was 0.51 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0103]
Embodiment 14
A dispersion was prepared in the same manner as in Example 1 except that the dye used was 3-diethylamino-6-methyl-7-anilinofluoran (hereinafter referred to as ODB) instead of ODB2. The whiteness of the dispersion composition was evaluated. The average particle size of the ODB dispersion obtained at this time was 0.47 μm. The evaluation result of the wetland covering property was favorable, with an OD value of 0.10 and a Δ whiteness of 9, which were good. The results are summarized in Table 1.
[0104]
Embodiment 15
A dispersion was prepared in the same manner as in Example 1, except that 3-isoamylethylamino-6-methyl-7-anilinofluoran (hereinafter referred to as S205) was used as the dye in place of ODB2. The performance and the whiteness of the dispersion composition were evaluated. The S205 dispersion obtained at this time had an average particle size of 0.47 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.07 and a Δ whiteness of 6. The results are summarized in Table 1.
[0105]
Embodiment 16
A dispersion was prepared in the same manner as in Example 1, except that 3-dipentylamino-6-methyl-7-anilinofluoran (hereinafter referred to as BLACK305) was used as the dye in place of ODB2, and the thermal paper performance was improved. And the whiteness of the dispersion composition was evaluated. The average particle size of the BLACK305 dispersion obtained at this time was 0.49 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0106]
Embodiment 17
A dispersion was prepared in the same manner as in Example 1, except that 3-ethyl-p-tolylamino-6-methyl-7-anilinofluoran (hereinafter referred to as ETAC) was used as the dye instead of ODB2. The thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the obtained ETAC dispersion was 0.47 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.07 and a Δ whiteness of 6. The results are summarized in Table 1.
[0107]
Embodiment 18
A dispersion was prepared in the same manner as in Example 1 except that 3-dibutylamino-7- (o-fluoro) -anilinofluoran (hereinafter referred to as TG21) was used as the dye in place of ODB2, and heat-sensitive. The paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the TG21 dispersion obtained at this time was 0.48 μm. The evaluation result of the wet-land covering property was good, with an OD value of 0.07 and a Δ whiteness of 6. The results are summarized in Table 1.
[0108]
Embodiment 19
Example 1 A dispersion was prepared in the same manner as in Example 1, except that 48.75 g of an aqueous solution of Gohselan L3266 (sulfonic acid-modified PVA, manufactured by Nippon Synthetic Chemical Industry) was used instead of Metroose 60SH03 as a dispersant when preparing a UU dispersion. The thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.49 μm. The evaluation result of the wet-land coverability was good, as the OD value was 0.09 and the Δ whiteness was 7. The results are summarized in Table 1.
[0109]
Embodiment 20
Example 1 is the same as Example 1 except that 48.75 g of an aqueous solution of DKS Discoat N-14 (special ammonium polycarboxylate, manufactured by Daiichi Kogyo Seiyaku) was used as a dispersant instead of Demol-T as a dispersant when preparing a UU dispersion. The dispersion was prepared by the method, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.49 μm. The evaluation result of the wet-skin resistance was 0.06 and the Δ whiteness was 5, which was good. The results are summarized in Table 1.
[0110]
Embodiment 21
A dispersion was prepared in the same manner as in Example 1 except that the UU dispersion was not subjected to heat treatment, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. As a result of evaluating the wetland covering property, the OD value was 0.09 and the Δ whiteness was 9. The results are summarized in Table 1.
[0111]
Embodiment 22
A dispersion was prepared in the same manner as in Example 2 except that the UU dispersion was not subjected to heat treatment, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.49 μm. As a result of evaluating the wetland cover property, the OD value was 0.07 and the Δ whiteness was 9. The results are summarized in Table 1.
[0112]
Embodiment 23
A dispersion was prepared in the same manner as in Example 5 except that the UU dispersion was not subjected to heat treatment, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. At this time, the average particle size of the obtained UU dispersion was 0.48 μm. As a result of evaluating the wetland cover property, the OD value was 0.07 and the Δ whiteness was 9. The results are summarized in Table 1.
[0113]
Embodiment 24
Except that in Example 1, 97.5 g of an aqueous solution of L3266 having a solid content of 5.38% was used alone as a dispersant at the time of preparing a UU dispersion, and only the ODB2 dispersion was heat-treated without performing the heat treatment on the UU dispersion. Prepared a dispersion in the same manner and evaluated thermal paper performance and whiteness of the dispersion composition. The average particle size of the obtained UU dispersion was 0.45 μm. The evaluation result of the wet-land covering property was that the OD value was 0.13 and the Δ whiteness was 15.
[0114]
Embodiment 25
In Example 1, 97.5 g of an aqueous solution of L3266 having a solid content of 5.38% was used alone as a dispersant during the preparation of a UU dispersion, and both the UU dispersion and the ODB2 dispersion were heat-treated. The dispersion was prepared and evaluated for thermal paper performance and whiteness of the dispersion composition. The average particle size of the obtained UU dispersion was 0.45 μm. As a result of evaluating the wetland skin covering property, the OD value was 0.12, and the Δ whiteness was 11.
[0115]
Embodiment 26
In the same manner as in Example 1 except that 97.5 g of a 60SH03 aqueous solution having a solid content of 5.38% was used alone as a dispersant at the time of preparing a UU dispersion, and no heat treatment was performed for both the UU dispersion and the ODB2 dispersion. The dispersion was prepared, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. The result of evaluation of the wetland skin covering resistance was an OD value of 0.09 and a Δ whiteness of 10.
[0116]
Embodiment 27
In the same manner as in Example 1, except that 97.5 g of an aqueous solution of SM15 having a solid content of 5.38% was used alone as a dispersant at the time of preparing a dispersion of UU, heat treatment was not performed for both the UU dispersion and the ODB2 dispersion. The dispersion was prepared, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. As a result of evaluating the wetland covering property, the OD value was 0.09 and the Δ whiteness was 9.
[0117]
Embodiment 28
In Example 1, 97.5 g of an aqueous solution of L3266 having a solid content of 5.38% was used alone as a dispersant when preparing a dispersion of UU, and Metroose 60SH03 having a solid content of 5.38% was used as a dispersant when preparing a dispersion of ODB2. Using 48.75 g of 48.75 g of Demol T having a solid content of 5.38%, a dispersion was prepared by the same method except that heat treatment was not performed for both the UU dispersion and the ODB2 dispersion. The body composition was evaluated for whiteness. The average particle size of the UU dispersion obtained at this time was 0.47 μm. As a result of evaluating the wet-skin coverage, the OD value was 0.14 and the Δ whiteness was 14.
[0118]
Embodiment 29
In Example 1, 97.5 g of an aqueous solution of L3266 having a solid content of 5.38% was used alone as a dispersant when preparing a dispersion of UU, and Metroose 60SH03 having a solid content of 5.38% was used as a dispersant when preparing a dispersion of ODB2. Preparation of dispersion by the same method except that 48.75 g, 48.75 g of Demol T having a solid content of 5.38% were used, and the UU dispersion was subjected to heat treatment at 60 ° C. × 12 h, and the ODB2 dispersion was subjected to heat treatment at 40 ° C. × 24 h. To evaluate the thermal paper performance and the whiteness of the dispersion composition. The average particle size of the UU dispersion obtained at this time was 0.47 μm. As a result of evaluating the wetland covering property, the OD value was 0.07 and the Δ whiteness was 6.
[0119]
Embodiment 30
In Example 1, 97.5 g of an aqueous solution of L3266 having a solid content of 5.38% was used alone as a dispersant when preparing a dispersion of UU, and Metroose 60SH03 having a solid content of 5.38% was used as a dispersant when preparing a dispersion of ODB2. Using 48.75 g of Demol T having a solid content of 5.38% and 48.75 g of the UU dispersion and the ODB2 dispersion, heat treatment was not performed for both the UU dispersion and the ODB2 dispersion, and the thermal paper performance and the dispersion were prepared in the same manner. The whiteness of the composition was evaluated. The average particle size of the UU dispersion obtained at this time was 0.47 μm. As a result of evaluating the wetland covering property, the OD value was 0.10 and the Δ whiteness was 9.
[0120]
Embodiment 31
Example 1 is the same as Example 1, except that 97.5 g of an aqueous solution of Neocol SWC (sodium di-alkylsulfosuccinate, manufactured by Daiichi Kogyo Seiyaku) having a solid content of 5.38% was used alone when preparing the UU dispersion. The dispersion was prepared in the same manner as described above, and the thermal paper performance and the whiteness of the dispersion composition were evaluated. The average particle size of the obtained UU dispersion was 0.45 μm. As a result of evaluating the wetland cover property, the OD value was 0.09 and the Δ whiteness was 14.
[0121]
Embodiment 32
In the same manner as in Example 1, except that 97.5 g of Levenol WX (sodium polyoxyethylene alkyl ether sulfate, manufactured by Kao) aqueous solution having a solid content of 5.38% was used alone at the time of preparing a UU dispersion. A dispersion was prepared. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. As a result of evaluating the wetland covering property, the OD value was 0.10 and the Δ whiteness was 11.
[0122]
Embodiment 33
Example 1 A dispersion was prepared in the same manner as in Example 1 except that 97.5 g of an aqueous solution of Emulgen 106 (polyoxyethylene lauryl ether, manufactured by Kao) having a solid content of 5.38% was used alone when a UU dispersion was prepared. Was prepared. The average particle diameter of the UU dispersion obtained at this time was 0.46 μm. As a result of evaluating the wetland covering property, the OD value was 0.10 and the Δ whiteness was 11.
[0123]
Embodiment 34
Example 1 A dispersion was prepared in the same manner as in Example 1 except that 97.5 g of an aqueous solution of Emanone 4110 (polyethylene glycol monooleate, manufactured by Kao) having a solid content of 5.38% was used alone when a UU dispersion was prepared. Was prepared. The average particle size of the UU dispersion obtained at this time was 0.47 μm. As a result of evaluating the wet land cover property, the OD value was 0.11, and the Δ whiteness was 11.
[0124]
[Table 1]
[0125]
[Table 2]
[0126]
[Table 3]
[0127]
[Table 4]
[0128]
[Comparative Example 1]
In the same manner as in Example 1, except that 97.5 g of an aqueous solution of Cotamine 24P (lauryltrimethylammonium chloride, manufactured by Kao) having a solid content of 5.38% was used alone at the time of preparing a UU dispersion, the dispersion was used. An attempt was made to prepare it, but it coagulated during mixing with the ODB2 dispersion, failing to obtain a good dispersion composition.
[0129]
[Comparative Example 2]
A dispersion was prepared in the same manner as in Example 1, except that 97.5 g of an aqueous solution of sanizole C (alkylbenzylmethylammonium chloride, manufactured by Kao) having a solid content of 5.38% was used alone when a UU dispersion was prepared. Was tried, but coagulated during mixing with the ODB2 dispersion, and a good dispersion composition could not be obtained.
[0130]
【The invention's effect】
As a dispersant used in preparing a dispersion composition containing a dye and a urea urethane compound, a cellulose derivative among water-soluble polymers, a naphthalene sulfonic acid derivative, and a polycarboxylic acid derivative among anionic surfactants are selected. By using one or more dispersants alone or in combination, the whiteness of the dispersion composition decreases over time, and the heat-sensitive recording material prepared using the dispersion composition has underground covering properties, particularly under high humidity conditions. Can be improved.
Claims (11)
a)ウレアウレタン化合物、ならびに無色および淡色の染料前駆体から選ばれる1種以上の化合物
b)陰イオン性および非イオン性の水溶性高分子、ならびに陰イオン性、非イオン性、および両性界面活性剤から選ばれる1種以上の化合物A dispersion composition containing the following components a) and b).
a) one or more compounds selected from urea urethane compounds and colorless and pale color dye precursors b) anionic and nonionic water-soluble polymers, and anionic, nonionic and amphoteric surfactants One or more compounds selected from agents
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007026451A1 (en) | 2005-08-30 | 2007-03-08 | Kuraray Co., Ltd | Thermal recording material |
JP2013063536A (en) * | 2011-09-16 | 2013-04-11 | Oji Holdings Corp | Photosensitive recording body and it manufacturing method |
CN114890917A (en) * | 2022-05-25 | 2022-08-12 | 沈阳感光化工研究院有限公司 | Asymmetric branched non-phenolic color developing agent and synthesis method thereof |
-
2003
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007026451A1 (en) | 2005-08-30 | 2007-03-08 | Kuraray Co., Ltd | Thermal recording material |
US8101546B2 (en) | 2005-08-30 | 2012-01-24 | Kuraray Co., Ltd. | Thermal recording material |
JP2013063536A (en) * | 2011-09-16 | 2013-04-11 | Oji Holdings Corp | Photosensitive recording body and it manufacturing method |
CN114890917A (en) * | 2022-05-25 | 2022-08-12 | 沈阳感光化工研究院有限公司 | Asymmetric branched non-phenolic color developing agent and synthesis method thereof |
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