WO2022255095A1 - ポリビニルアルコール系重合体組成物、及びガラスペーパー用バインダー - Google Patents
ポリビニルアルコール系重合体組成物、及びガラスペーパー用バインダー Download PDFInfo
- Publication number
- WO2022255095A1 WO2022255095A1 PCT/JP2022/020586 JP2022020586W WO2022255095A1 WO 2022255095 A1 WO2022255095 A1 WO 2022255095A1 JP 2022020586 W JP2022020586 W JP 2022020586W WO 2022255095 A1 WO2022255095 A1 WO 2022255095A1
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- WO
- WIPO (PCT)
- Prior art keywords
- polyvinyl alcohol
- mass
- polymer composition
- alcohol polymer
- parts
- Prior art date
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- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 114
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 47
- 229920000642 polymer Polymers 0.000 title claims abstract description 40
- 239000011230 binding agent Substances 0.000 title claims description 22
- 239000011521 glass Substances 0.000 title claims description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 60
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 63
- 238000007127 saponification reaction Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 18
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 13
- 239000001632 sodium acetate Substances 0.000 claims description 13
- 235000017281 sodium acetate Nutrition 0.000 claims description 13
- 238000004383 yellowing Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 description 46
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 230000000903 blocking effect Effects 0.000 description 19
- 229920001567 vinyl ester resin Polymers 0.000 description 16
- 230000001070 adhesive effect Effects 0.000 description 15
- 230000008961 swelling Effects 0.000 description 15
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 15
- 239000000853 adhesive Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 13
- 239000000178 monomer Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000006116 polymerization reaction Methods 0.000 description 11
- 239000004809 Teflon Substances 0.000 description 10
- 229920006362 Teflon® Polymers 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000003365 glass fiber Substances 0.000 description 6
- 229920001290 polyvinyl ester Polymers 0.000 description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- -1 2-ethylhexyl Chemical group 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 4
- 230000000379 polymerizing effect Effects 0.000 description 4
- 229920002689 polyvinyl acetate Polymers 0.000 description 4
- 239000011118 polyvinyl acetate Substances 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000011088 calibration curve Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003505 polymerization initiator Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000007870 radical polymerization initiator Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical compound CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 1
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- RHSCFNJCBGIZAS-UHFFFAOYSA-N CC(=C)C(=O)OCCCOP(=O)=O Chemical compound CC(=C)C(=O)OCCCOP(=O)=O RHSCFNJCBGIZAS-UHFFFAOYSA-N 0.000 description 1
- 241001050985 Disco Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 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 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- ITZXULOAYIAYNU-UHFFFAOYSA-N cerium(4+) Chemical compound [Ce+4] ITZXULOAYIAYNU-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- YOQPKXIRWPWFIE-UHFFFAOYSA-N ctk4c8335 Chemical compound CC(=C)C(=O)OCCOP(=O)=O YOQPKXIRWPWFIE-UHFFFAOYSA-N 0.000 description 1
- YCUBDDIKWLELPD-UHFFFAOYSA-N ethenyl 2,2-dimethylpropanoate Chemical compound CC(C)(C)C(=O)OC=C YCUBDDIKWLELPD-UHFFFAOYSA-N 0.000 description 1
- CMDXMIHZUJPRHG-UHFFFAOYSA-N ethenyl decanoate Chemical compound CCCCCCCCCC(=O)OC=C CMDXMIHZUJPRHG-UHFFFAOYSA-N 0.000 description 1
- GLVVKKSPKXTQRB-UHFFFAOYSA-N ethenyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC=C GLVVKKSPKXTQRB-UHFFFAOYSA-N 0.000 description 1
- AFSIMBWBBOJPJG-UHFFFAOYSA-N ethenyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC=C AFSIMBWBBOJPJG-UHFFFAOYSA-N 0.000 description 1
- BLZSRIYYOIZLJL-UHFFFAOYSA-N ethenyl pentanoate Chemical compound CCCCC(=O)OC=C BLZSRIYYOIZLJL-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- BDAWXSQJJCIFIK-UHFFFAOYSA-N potassium methoxide Chemical compound [K+].[O-]C BDAWXSQJJCIFIK-UHFFFAOYSA-N 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007717 redox polymerization reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F16/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
- C08F16/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an alcohol radical
- C08F16/04—Acyclic compounds
- C08F16/06—Polyvinyl alcohol ; Vinyl alcohol
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/12—Hydrolysis
Definitions
- the present invention relates to a polyvinyl alcohol polymer composition.
- the present invention also relates to a binder for glass paper containing the composition.
- Polyvinyl alcohol polymers are suitable for use as adhesives, binders, etc. due to their excellent adhesive properties.
- a binder for glass paper is one of them, and a polyvinyl alcohol polymer is used.
- the polyvinyl alcohol polymer used as a binder for glass paper is used in the form of a slurry dispersed in water or an aqueous solution dissolved in water. Therefore, the glass paper is manufactured by heating and drying. At this time, the polyvinyl alcohol polymer may turn yellow due to heating, which is a problem.
- Patent Documents 1 and 2 describe a polyvinyl alcohol-based polymer used as a binder for glass paper.
- one object of the present invention is to provide a polyvinyl alcohol polymer composition having improved resistance to yellowing.
- Another object of the present invention is to provide a binder for glass paper containing such a polyvinyl alcohol polymer composition.
- a polyvinyl alcohol polymer composition having improved yellowing resistance is provided by adding citric acid to the polyvinyl alcohol polymer.
- polyvinyl alcohol-based polymer composition with improved yellowing resistance. Further, by using the polyvinyl alcohol-based polymer composition, an excellent binder for glass paper is provided.
- the polyvinyl alcohol-based polymer composition according to the present invention must contain a polyvinyl alcohol-based polymer and citric acid.
- the higher the content of citric acid, the easier it is to exhibit the effect of improving yellowing resistance. Therefore, the lower limit of the content of citric acid in the polyvinyl alcohol polymer composition is preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the polyvinyl alcohol polymer. and more preferably 0.5 parts by mass or more.
- the content of citric acid is preferably as small as possible.
- the upper limit of the content of citric acid in the polyvinyl alcohol polymer composition is preferably 10 parts by mass or less, more preferably 5.0 parts by mass or less, and More preferably, it is 3.0 parts by mass or less. Therefore, the range of the content of citric acid in the polyvinyl alcohol polymer composition is, for example, preferably 0.01 to 10 parts by mass, more preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol polymer. 5.0 parts by weight, more preferably 0.5 to 3.0 parts by weight.
- the polyvinyl alcohol-based polymer in the present invention is prepared by saponifying all or part of polyvinyl esters obtained by polymerizing vinyl esters. good.
- Polyvinyl esters may be homopolymers of one or more vinyl esters, and may be copolymers of vinyl esters and monomers other than vinyl esters that are copolymerizable with vinyl esters. may From the viewpoint of adhesive performance of the polyvinyl alcohol polymer, homopolymers of vinyl esters are preferred.
- Vinyl esters may be, for example, vinyl acetate, vinyl propionate, vinyl valerate, vinyl caprate, vinyl laurate, vinyl stearate, vinyl benzoate, vinyl pivalate, etc., from the viewpoint of ease of polymerization. Therefore, vinyl acetate is preferred. Vinyl esters may be used individually by 1 type, and may be used in combination of 2 or more types.
- Monomers other than vinyl esters that can be copolymerized with vinyl esters include, for example, ⁇ -olefin monomers such as ethylene and propylene, methyl (meth)acrylate, ethyl (meth)acrylate, (meth)acrylic Butyl acid, (meth)acrylic acid alkyl ester monomers such as 2-ethylhexyl (meth)acrylate, unsaturated amide monomers such as (meth)acrylamide and N-methylolacrylamide, (meth)acrylic acid, crotonic acid , Maleic acid, itaconic acid, fumaric acid and other unsaturated carboxylic acid monomers, unsaturated carboxylic acid alkyl (methyl, ethyl, propyl, etc.) ester monomers, unsaturated carboxylic acid anhydrides such as maleic anhydride , Salts of unsaturated carboxylic acids with sodium, potassium, ammonium, etc., allyl glycidyl ether
- a polymerization initiator may be used when polymerizing vinyl esters.
- the polymerization initiator may be, for example, a radical polymerization initiator.
- Radical polymerization initiators include azo compounds such as azobisisobutyronitrile and azobisdimethylvaleronitrile, organic peroxides such as benzoyl peroxide and dicumyl peroxide, inorganic peroxides such as potassium persulfate, cerium (IV) may be a redox polymerization initiator such as a salt-alcohol system.
- the method of polymerizing vinyl esters may be known polymerization methods such as solution polymerization, suspension polymerization, bulk polymerization, etc. Solution polymerization is preferred because of ease of operation. Moreover, since the same solvent as the solvent for the saponification reaction to be carried out subsequently can be used, the method for polymerizing vinyl esters is preferably solution polymerization in alcohol. In the case of solution polymerization, the polymerization reaction temperature is preferably 30° C. or higher and may be 90° C. or lower.
- polyvinyl esters obtained by polymerization are dissolved in alcohol to prepare an alcohol solution, and the ester in the molecule is transesterified with alcohol as a solvent in the presence of an alkaline catalyst or an acid catalyst. (By disassembling).
- alcohols used as solvents for saponification include methanol, ethanol, propanol, and butanol. From the standpoint of ease of reaction, etc., it is preferable to use methanol.
- concentration of the polyvinyl ester in the alcohol solution may be, for example, 10 parts by mass or more and 80 parts by mass or less.
- the reaction temperature during the saponification reaction is preferably 10 to 70°C, more preferably 30 to 50°C.
- the saponification reaction time is preferably 10 minutes to 10 hours, more preferably 30 minutes to 3 hours.
- alkali metal hydroxides such as sodium hydroxide and potassium hydroxide
- alcoholates such as sodium methylate, sodium ethylate and potassium methylate
- acid catalysts include aqueous inorganic acid solutions such as hydrochloric acid and sulfuric acid, and organic acids such as p-toluenesulfonic acid. It is preferable to use sodium hydroxide from the viewpoints of ease of reaction control, production cost, and the like.
- the amount of these catalysts used is preferably, for example, 0.1 to 100 mmol equivalents with respect to the vinyl ester monomer units of the polyvinyl ester.
- the degree of saponification of the polyvinyl alcohol polymer is not particularly defined, it is preferably 95.0 mol% or more, more preferably 97.0 mol% or more, and even more preferably 97.0 mol% or more from the viewpoint of water resistance and adhesion performance. It is 99.0 mol% or more.
- the upper limit of the degree of saponification of the polyvinyl alcohol-based polymer is not particularly set, and may be 100 mol %.
- the "degree of saponification” in this specification indicates a value calculated by measuring according to JIS K 6726-1994 "3.5 Degree of saponification”.
- the method for saponifying the polyvinyl ester may be, for example, a belt saponification method, a kneader saponification method or the like, and from the viewpoint of ease of production, the belt saponification method is preferable.
- the content of sodium acetate in the polyvinyl alcohol-based polymer composition is preferably based on 100 parts by mass of the polyvinyl alcohol-based polymer, from the viewpoint of maintaining the effect of improving yellowing resistance when citric acid is added. is 1.0 parts by mass or less, more preferably 0.7 parts by mass or less, and even more preferably 0.5 parts by mass or less.
- the sodium acetate content in the polyvinyl alcohol polymer composition is typically 0 per 100 parts by mass of the polyvinyl alcohol polymer.
- the sodium acetate content in the polyvinyl alcohol polymer composition is measured by the dissolution conductivity method described in JIS K 6726-1994.
- the content of methanol in the polyvinyl alcohol polymer composition is preferably 0.1 to 3.0 parts by mass, for example, with respect to 100 parts by mass of the polyvinyl alcohol polymer. More preferably, it is 0.1 to 1.0 parts by mass.
- the methanol content can be adjusted by the drying time of the polyvinyl alcohol polymer. Also, the methanol content is determined by an absolute calibration curve method using gas chromatography. First, a calibration curve is created using a mixture of methanol and water whose methanol content is known. Next, 1 g of the polyvinyl alcohol-based polymer composition is added to 49 mL of water and dissolved by heating in an incubator at 80°C.
- the lower limit of Y/X is preferably 0.3 or more, more preferably 0.5 or more, and even more preferably 1.0 or more.
- the smaller Y/X is, the easier it is to improve the adhesion performance.
- the upper limit of Y/X is 5.0 or less, preferably 4.0 or less, and still more preferably 3.0 or less.
- the range of Y/X is preferably 0.3 to 5.0, more preferably 0.5 to 4.0, still more preferably 1.0, from the viewpoint of achieving both blocking suppression effect and adhesion performance. 0 to 3.0.
- the particle size of the polyvinyl alcohol-based polymer can be adjusted by adjusting the pulverization time and sieving in the pulverization step. Blocking can be suppressed by adjusting the particle size of the polyvinyl alcohol-based polymer to fall within the above range.
- the mass fraction of the polyvinyl alcohol polymer having a particle size of 1000 ⁇ m or more was obtained by sieving the polyvinyl alcohol polymer to be measured using a test sieve (nominal opening 1000 ⁇ m) described in JIS Z 8801-1:2006. It means the mass-based ratio of the polyvinyl alcohol-based polymer (screened product) remaining on the sieve when the measurement is performed (mass of the sieve product/total mass of the polyvinyl alcohol-based polymer to be measured).
- the mass fraction of the polyvinyl alcohol polymer having a particle size of 500 ⁇ m or less is measured using a test sieve (nominal opening 500 ⁇ m) described in JIS Z 8801-1: 2006. It means the mass-based ratio of the polyvinyl alcohol polymer (unsieved product) that passed through the sieve when sieved (mass of unsieved product/total mass of polyvinyl alcohol polymer to be measured).
- the viscosity average degree of polymerization of the polyvinyl alcohol-based polymer may be, for example, 100 or more, for example, 700 or more, for example, 1,000 or more, and is, for example, 10,000 or less, 6,000 or less, or 4,000 or less.
- the total content of the polyvinyl alcohol-based polymer and citric acid is 90% by mass or more, preferably 95% by mass or more. % by mass.
- a binder for glass paper containing the polyvinyl alcohol polymer composition of the present invention.
- the binder for glass paper may be composed of the polyvinyl alcohol-based polymer composition of the present invention itself, or may be appropriately added with known additives.
- Glass paper is a type of nonwoven fabric made from short glass fibers (glass wool), and is produced by bonding the short glass fibers with a binder.
- a polyvinyl alcohol-based polymer is one of typical binders.
- the polyvinyl alcohol-based polymer composition according to the present invention includes a primary binder that is used in the form of a slurry in which the polyvinyl alcohol-based polymer is swollen and dispersed in water, and a secondary binder that uses the polyvinyl alcohol-based polymer as an aqueous solution.
- the primary binder serves to bond the short glass fibers together with the short glass fibers by being strained into a sheet on a wire mesh and then heated in a dryer.
- the secondary binder is applied to the short glass fiber sheet bonded by the primary binder and dried by heating to exhibit the effect of improving the adhesive force.
- the polyvinyl alcohol-based polymer composition of the present invention can be used as both a primary binder and a secondary binder, and is particularly suitable as a secondary binder.
- Example 1 A reactor equipped with a reflux condenser, a dropping funnel and a stirrer was charged with 100 parts by mass of vinyl acetate, 28.2 parts by mass of methanol and 0.03 parts by mass of azobisisobutyronitrile, and the mixture was stirred under nitrogen flow. Polymerization was carried out at the boiling point for 6.7 hours. Next, unreacted vinyl acetate was removed from the polymerization system to obtain a methanol solution of polyvinyl acetate with a degree of polymerization of 2150 (solid content concentration: 54% by mass). About 3 g of the obtained methanol solution of polyvinyl acetate was weighed in an aluminum cup, dried at 150° C. for 30 minutes, and then the solid content concentration was measured from the change in mass.
- the obtained polyvinyl alcohol has a viscosity average degree of polymerization, a degree of saponification, a content of sodium acetate with respect to 100 parts by mass of polyvinyl alcohol, a content of methanol with respect to 100 parts by mass of polyvinyl alcohol, a mass ratio of large particle size to small particle size (polyvinyl
- the viscosity average degree of polymerization was 1700
- the saponification The concentration was 99.3 mol %
- the content of sodium acetate was 0.5 parts by mass
- the content of methanol was 1.0 parts by mass
- the mass ratio of large particles to small particles was 2.0. Table 1 shows the results.
- ⁇ Yellowing resistance test> 3.0 parts by mass of powdered citric acid was added to 100 parts by mass of the powdered polyvinyl alcohol obtained above, and the mixture was uniformly mixed to obtain a polyvinyl alcohol polymer composition. Thereafter, a polyvinyl alcohol film having a thickness of about 100 ⁇ m was produced by a solution casting method using this polyvinyl alcohol polymer composition. The film was cut into 50 mm squares and heat-treated at 150° C. for 30 minutes. Also, a film prepared in the same manner was heat-treated at 200° C. for 30 minutes.
- the degree of yellowness of the film before and after heat treatment was measured by the following method.
- a film having a thickness of about 100 ⁇ m is subjected to humidity conditioning under an atmosphere of 20 ° C. and 60% RH for 24 hours, and XYZ in the XYZ color system is measured with a transmission type color difference meter (model ZE 2000 manufactured by Nippon Denshoku Industries Co., Ltd.), Yellowness index (YI) was calculated.
- YI 100*(1.28X-1.06Z)/Y
- the yellowness index was respectively 0.5 (before heat treatment), 3.0 (after heat treatment at 150°C) and 25.4 (after heat treatment at 200°C). Table 1 shows the results.
- Adhesion tests were conducted on the polyvinyl alcohol-based polymer composition prepared above according to the following procedure. 50 mL of pure water was weighed into a 100 mL disco cup, and 0.438 g of polyvinyl alcohol polymer composition was added little by little while stirring with a stirrer to swell the cup. 450 mL of pure water was weighed into a mixer, 1.750 g of short glass fibers with a length of 6 mm were added little by little, and the mixture was gently stirred with a Teflon (registered trademark) rod. The swollen polyvinyl alcohol-based polymer-containing slurry was put into a mixer and stirred for 2 minutes.
- the slurry liquid after stirring was poured into a Nutsche set with an 80-mesh Teflon net (manufactured by Shimadzu Corporation), lightly stirred with a Teflon rod to make it uniform, and then the rubber stopper was removed so as not to tilt the Nutsche.
- Teflon net When the slurry liquid passing through the Teflon net stops, the Teflon net and the filtered matter on the Teflon net are pulled up together with tweezers, placed on the recording plate, and placed on a 10-mesh Teflon net (manufactured by Shimadzu Corporation), industrial
- the filter paper was placed on top of the filter in order.
- the 80-mesh Teflon net was removed, and a 10-mesh Teflon net and industrial filter paper were placed on the filter in this order.
- the pressure roller was reciprocated 5 times on the laminate thus produced, and the upper and lower industrial filter papers were replaced with different industrial filter papers. Further, 0.49 MPa was applied for 5 minutes with a press, and after taking out, the industrial filter paper was replaced with another industrial filter paper. It was subjected to an electric heat press at 110° C. for 2 minutes, taken out once, the pressure was released, and left in the atmosphere for 10 minutes to evaporate moisture. After that, it was again taken out from the electric heat press at 110° C. for 1 minute. After that, the Teflon mesh and the industrial filter paper were peeled off.
- the glass paper prepared in this way is cut into 20 mm ⁇ 80 mm pieces, and a tensile test is performed using a tensile tester (manufactured by Shimadzu Corporation, model AG-X 5 kN) at a tensile speed of 1 mm / min at 20 ° C. and evaluated the adhesive strength. As a result, the adhesive strength was 13N. Table 1 shows the results.
- ⁇ Blocking test> A sample obtained by heat-sealing 30 g of a polyvinyl alcohol-based polymer composition to a size of 95 mm ⁇ 50 mm with a polyethylene film and hermetically sealing the sample was subjected to a load of 210 g/cm 2 and left at 40° C. for 12 hours. After 12 hours at -20°C, the blocking status was evaluated. If the blocked mass was less than 5% with respect to 30 g of the polyvinyl alcohol-based polymer composition, it was rated as ⁇ , if it was 5 to 30%, it was rated as ⁇ , and if it exceeded 30%, it was rated as ⁇ . As a result, the blocking test evaluation was ⁇ . Table 1 shows the results.
- the blocked mass is obtained by taking out the polyvinyl alcohol polymer composition (30 g) from the sample prepared above and using a test sieve (nominal opening 2 mm) described in JIS Z 8801-1:2006.
- the mass A (g) of the polyvinyl alcohol-based polymer composition remaining on the sieve after sieving (the sieve product) was weighed and calculated by the following formula.
- Blocked mass (%) (A/30) x 100
- Example 2 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the citric acid content was changed to 1.0 part by mass, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 5.2 (after heat treatment at 150°C) and 76.4 (after heat treatment at 200°C).
- the adhesion strength was 12N
- the degree of swelling was 4%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 3 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the citric acid content was changed to 0.5 parts by mass, and various tests were conducted.
- the yellowness index was respectively 0.5 (before heat treatment), 6.5 (after heat treatment at 150°C) and 112 (after heat treatment at 200°C).
- the adhesive strength was 13N
- the degree of swelling was 5%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 4 A polyvinyl alcohol-based polymer composition was obtained in the same manner as in Example 1, except that the citric acid content was changed to 0.1 part by mass, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 7.1 (after heat treatment at 150°C) and 140 (after heat treatment at 200°C). Further, the adhesion strength was 14N, the degree of swelling was 4%, and the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 5 A polyvinyl alcohol-based polymer composition was obtained in the same manner as in Example 1, except that the citric acid content was changed to 11 parts by mass, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.1 (after heat treatment at 150°C) and 26.3 (after heat treatment at 200°C).
- the adhesion strength was 7N
- the degree of swelling was 3%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 6 A polyvinyl alcohol polymer composition was obtained and subjected to various tests in the same manner as in Example 1, except that the amount of methanol for washing was changed to 20 parts by mass and the content of sodium acetate was changed to 0.7 parts by mass.
- the yellowness index was respectively 0.7 (before heat treatment), 3.5 (after heat treatment at 150°C) and 28.9 (after heat treatment at 200°C).
- the adhesive strength was 13N
- the degree of swelling was 3%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 7 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1 except that the amount of methanol for washing was changed to 0 parts by mass and the content of sodium acetate was changed to 1.0 parts by mass, and various tests were performed.
- the yellowness index was respectively 0.7 (before heat treatment), 4.6 (after heat treatment at 150°C) and 30.5 (after heat treatment at 200°C).
- the adhesive strength was 13N
- the degree of swelling was 5%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 8 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1 except that the amount of sodium hydroxide added was changed to 19 mmol and the degree of saponification was changed to 95.0 mol %, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.5 (after heat treatment at 150°C) and 27.8 (after heat treatment at 200°C).
- the adhesive strength was 10N
- the degree of swelling was 8%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 9 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the amount of sodium hydroxide added was changed to 18.5 mmol and the degree of saponification was changed to 93.0 mol %, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.2 (after heat treatment at 150°C) and 26.1 (after heat treatment at 200°C).
- the adhesive strength was 8N
- the degree of swelling was 12%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 10 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the drying time was changed to 40 minutes and the methanol content was changed to 3.0 parts by mass, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.1 (after heat treatment at 150°C) and 26.2 (after heat treatment at 200°C).
- the adhesive strength was 13N
- the degree of swelling was 4%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 11 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the pulverization time was changed to 15 minutes and the mass ratio of the large particle size to the small particle size was changed to 0.2, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.4 (after heat treatment at 150°C) and 26.6 (after heat treatment at 200°C). Further, the adhesion strength was 12N, the degree of swelling was 4%, and the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 12 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that the pulverization time was changed to 5 minutes and the mass ratio of the large particle size to the small particle size was changed to 4.0, and various tests were performed.
- the yellowness index was respectively 0.5 (before heat treatment), 3.2 (after heat treatment at 150°C) and 24.1 (after heat treatment at 200°C).
- the adhesive strength was 8N
- the degree of swelling was 3%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
- Example 1 A polyvinyl alcohol polymer composition was obtained in the same manner as in Example 1, except that no citric acid was added, and various tests were conducted.
- the yellowness index was respectively 0.5 (before heat treatment), 7.6 (after heat treatment at 150°C) and 171 (after heat treatment at 200°C).
- the adhesive strength was 13 N
- the degree of swelling was 4%
- the blocking test evaluation was ⁇ . Table 1 shows the results.
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Abstract
Description
log(P)=1.613×log([η]×104/8.29)・・・式(1)
一次バインダーは、ガラス短繊維とともに金網上にシート状に漉かれた後、乾燥機中で加熱されることでガラス短繊維を接着する役目をする。二次バインダーは、一次バインダーにより接着されたガラス短繊維のシートに塗布し、加熱乾燥することで接着力を向上させる効果を示す。本発明のポリビニルアルコール系重合体組成物は、一次バインダー、二次バインダーともに使用可能であるが、特に二次バインダーとして好適に使用可能である。
還流冷却器、滴下漏斗、攪拌機を備えた反応器に、酢酸ビニル100質量部、メタノール28.2質量部、及びアゾビスイソブチロニトリル0.03質量部を仕込み、窒素気流化で攪拌しながら沸点下で6.7時間重合を行った。次いで、未反応の酢酸ビニルを重合系外に除去し、重合度2150のポリ酢酸ビニルのメタノール溶液(固形分濃度54質量%)を得た。固形分濃度については、得られたポリ酢酸ビニルのメタノール溶液約3gをアルミカップに計量し150℃、30分間乾燥させた後の質量変化から測定した。
上記で得た粉末状のポリビニルアルコール100質量部に対し、粉末状のクエン酸を3.0質量部添加して、均一に混合することによりポリビニルアルコール系重合体組成物を得た。その後、このポリビニルアルコール系重合体組成物を用いて溶液キャスト法によって、厚さ約100μmのポリビニルアルコールフィルムを作製した。当該フィルムを50mm四方にカッティングし、150℃で30分間加熱処理を行った。また、同様に作成したフィルムに対して200℃で30分間加熱処理を行った。
厚さ約100μmのフィルムを20℃、60%RH雰囲気下で24時間調湿を行い、透過型色差計(日本電色工業株式会社製型式ZE 2000)でXYZ表色系におけるXYZを測定し、黄色度(YI)を計算した。
(計算式:YI=100*(1.28X-1.06Z)/Y)
黄色度はそれぞれ、0.5(加熱処理前)、3.0(150℃加熱処理後)及び25.4(200℃加熱処理後)であった。結果を表1に示す。
上記で作製したポリビニルアルコール系重合体組成物について、以下の手順により接着試験を行った。
100mLのディスコカップに50mLの純水を計量し、攪拌子を入れて攪拌しながらポリビニルアルコール系重合体組成物0.438gを少しずつ入れ、膨潤させた。
ミキサーに450mLの純水を計量し、長さ6mmのガラス短繊維1.750gを少しずつ入れ、テフロン(登録商標)棒で軽く攪拌した。
膨潤させたポリビニルアルコール系重合体含有スラリー液をミキサーに入れて、ミキサーで2分間攪拌した。
攪拌後のスラリー液を80メッシュのテフロン網(株式会社島津製作所製)をセットしたヌッチェに流し込み、テフロン棒で軽く攪拌させて均等にした後、ヌッチェを傾けないようゴム栓を外した。
テフロン網を通過するスラリー液が途絶えたら、ピンセットでテフロン網と該テフロン網上の濾物とを一緒に引き上げて記録板の上に置き、10メッシュのテフロン網(株式会社島津製作所製)、工業用濾紙の順に濾物の上に置いた。上下反対にして、80メッシュのテフロン網を取り外し、10メッシュのテフロン網、工業用濾紙の順に濾物の上に置いた。
このようにして作製した積層体の上で圧着ロールを5往復させ、上下の工業用濾紙を別の工業用濾紙に交換した。
更にプレス機で0.49MPaを5分間掛け、取り出し後、工業用濾紙を別の工業用濾紙に交換した。
110℃の電熱プレスに2分間掛け、一度取り出して圧力を開放し、10分間大気中に放置して水分を飛ばした。その後、もう一度、110℃の電熱プレスに1分間掛けて取り出した。その後、テフロン網及び工業用濾紙を剥がした。
このようにして作製したガラスペーパーを20mm×80mmにカッティングして、引張試験機(株式会社島津製作所製、型式AG-X 5kN)を用い、20℃の条件で引張速度1mm/minにて引張試験を行い、接着強度の評価を行った。その結果、接着強度は13Nであった。結果を表1に示す。
上記で作製したポリビニルアルコール系重合体組成物の初期質量を測定した。次に、20℃の水中に5分浸漬後、No.5A濾紙を装着したブフナー漏斗で濾取し、ポリビニルアルコール系重合体組成物の膨潤状態での質量を測定した。以下の式により膨潤度を算出することにより、耐水性の評価を行った。その結果、膨潤度は3%であった。結果を表1に示す。
膨潤度(%)=[濾取したポリビニルアルコール系重合体組成物の膨潤状態での質量]/[ポリビニルアルコール系重合体組成物の初期質量]×100
ポリビニルアルコール系重合体組成物30gを95mm×50mmの大きさにポリエチレンフィルムでヒートシールし密閉して得られた試料に、210g/cm2の加重をかけ、40℃で12時間置いた後に、更にマイナス20℃で12時間置いた後、ブロッキング状況を評価した。ポリビニルアルコール系重合体組成物30gに対し、ブロッキングした質量が5%未満であれば◎とし、5~30%であれば○とし、30%超であれば△とした。その結果、ブロッキング試験の評価は◎であった。結果を表1に示す。ここで、ブロッキングした質量は、上記で作製した試料からポリビニルアルコール系重合体組成物(30g)を取り出して、JIS Z 8801-1:2006に記載の試験用ふるい(公称目開き2mm)を用いて篩った際に篩の上に残るポリビニルアルコール系重合体組成物(篩上品)の質量A(g)を秤量して、以下の式により算出した。
ブロッキングした質量(%)=(A/30)×100
クエン酸含有量を1.0質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、5.2(150℃加熱処理後)及び76.4(200℃加熱処理後)であった。また、接着強度は12N、膨潤度は4%、ブロッキング試験の評価は◎であった。結果を表1に示す。
クエン酸含有量を0.5質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、6.5(150℃加熱処理後)及び112(200℃加熱処理後)であった。また、接着強度は13N、膨潤度は5%、ブロッキング試験の評価は◎であった。結果を表1に示す。
クエン酸含有量を0.1質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、7.1(150℃加熱処理後)及び140(200℃加熱処理後)であった。また、接着強度は14N、膨潤度は4%、ブロッキング試験の評価は◎であった。結果を表1に示す。
クエン酸含有量を11質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.1(150℃加熱処理後)及び26.3(200℃加熱処理後)であった。また、接着強度は7N、膨潤度は3%、ブロッキング試験の評価は◎であった。結果を表1に示す。
洗浄用メタノール量を20質量部にして、酢酸ナトリウム含有量を0.7質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.7(加熱処理前)、3.5(150℃加熱処理後)及び28.9(200℃加熱処理後)であった。また、接着強度は13N、膨潤度は3%、ブロッキング試験の評価は◎であった。結果を表1に示す。
洗浄用メタノール量を0質量部にして、酢酸ナトリウム含有量を1.0質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.7(加熱処理前)、4.6(150℃加熱処理後)及び30.5(200℃加熱処理後)であった。また、接着強度は13N、膨潤度は5%、ブロッキング試験の評価は◎であった。結果を表1に示す。
水酸化ナトリウム添加量を19mmolにして、ケン化度を95.0mol%に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.5(150℃加熱処理後)及び27.8(200℃加熱処理後)であった。また、接着強度は10N、膨潤度は8%、ブロッキング試験の評価は◎であった。結果を表1に示す。
水酸化ナトリウム添加量を18.5mmolにして、ケン化度を93.0mol%に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.2(150℃加熱処理後)及び26.1(200℃加熱処理後)であった。また、接着強度は8N、膨潤度は12%、ブロッキング試験の評価は◎であった。結果を表1に示す。
乾燥時間を40分間にして、メタノール含有量を3.0質量部に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.1(150℃加熱処理後)及び26.2(200℃加熱処理後)であった。また、接着強度は13N、膨潤度は4%、ブロッキング試験の評価は〇であった。結果を表1に示す。
粉砕時間を15分間にして、小粒径に対する大粒径の質量比を0.2に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.4(150℃加熱処理後)及び26.6(200℃加熱処理後)であった。また、接着強度は12N、膨潤度は4%、ブロッキング試験の評価は〇であった。結果を表1に示す。
粉砕時間を5分間にして、小粒径に対する大粒径の質量比を4.0に変えた以外は実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、3.2(150℃加熱処理後)及び24.1(200℃加熱処理後)であった。また、接着強度は8N、膨潤度は3%、ブロッキング試験の評価は◎であった。結果を表1に示す。
クエン酸の添加を行わなかったことを除き、実施例1と同様にしてポリビニルアルコール系重合体組成物を得て各種試験を行った。黄色度はそれぞれ、0.5(加熱処理前)、7.6(150℃加熱処理後)及び171(200℃加熱処理後)であった。また、接着強度は13N、膨潤度は4%、ブロッキング試験の評価は◎であった。結果を表1に示す。
Claims (7)
- ポリビニルアルコール系重合体とクエン酸とを含有するポリビニルアルコール系重合体組成物。
- クエン酸の含有量がポリビニルアルコール系重合体100質量部に対し0.01~10質量部である請求項1に記載のポリビニルアルコール系重合体組成物。
- 酢酸ナトリウムの含有量がポリビニルアルコール系重合体100質量部に対し1.0質量部以下である請求項1又は2に記載のポリビニルアルコール系重合体組成物。
- ポリビニルアルコール系重合体のケン化度が95.0mol%以上である請求項1~3の何れか一項に記載のポリビニルアルコール系重合体組成物。
- メタノールの含有量がポリビニルアルコール系重合体100質量部に対し0.1~3.0質量部である請求項1~4の何れか一項に記載のポリビニルアルコール系重合体組成物。
- ポリビニルアルコール系重合体の粒径500μm以下の質量分率に対する前記ポリビニルアルコール系重合体の粒径1000μm以上の質量分率の比が0.3~5.0である請求項1~5の何れか一項に記載のポリビニルアルコール系重合体組成物。
- 請求項1~6の何れか一項に記載のポリビニルアルコール系重合体組成物を含むガラスペーパー用バインダー。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1193075A (ja) * | 1997-09-16 | 1999-04-06 | Kuraray Co Ltd | ポリビニルアルコール系組成物およびその用途 |
JPH11199740A (ja) * | 1998-01-09 | 1999-07-27 | Kuraray Co Ltd | アミノ基変性ポリビニルアルコール組成物 |
JPH11222546A (ja) * | 1997-06-11 | 1999-08-17 | Kuraray Co Ltd | 水溶性フィルム |
WO2014192773A1 (ja) * | 2013-05-31 | 2014-12-04 | 株式会社クラレ | ポリビニルアルコール及びそれを含有する紙用コーティング剤 |
US20170044407A1 (en) | 2015-08-12 | 2017-02-16 | Denki Kagaku Kogyo Kabushiki Kaisha | Binder for Glass Paper |
WO2019012581A1 (ja) | 2017-07-10 | 2019-01-17 | デンカ株式会社 | ポリビニルアルコールの製造方法 |
WO2020050255A1 (ja) * | 2018-09-05 | 2020-03-12 | 株式会社クラレ | ポリビニルアルコール樹脂の製造方法、及びポリビニルアルコール樹脂 |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11222546A (ja) * | 1997-06-11 | 1999-08-17 | Kuraray Co Ltd | 水溶性フィルム |
JPH1193075A (ja) * | 1997-09-16 | 1999-04-06 | Kuraray Co Ltd | ポリビニルアルコール系組成物およびその用途 |
JPH11199740A (ja) * | 1998-01-09 | 1999-07-27 | Kuraray Co Ltd | アミノ基変性ポリビニルアルコール組成物 |
WO2014192773A1 (ja) * | 2013-05-31 | 2014-12-04 | 株式会社クラレ | ポリビニルアルコール及びそれを含有する紙用コーティング剤 |
US20170044407A1 (en) | 2015-08-12 | 2017-02-16 | Denki Kagaku Kogyo Kabushiki Kaisha | Binder for Glass Paper |
WO2019012581A1 (ja) | 2017-07-10 | 2019-01-17 | デンカ株式会社 | ポリビニルアルコールの製造方法 |
WO2020050255A1 (ja) * | 2018-09-05 | 2020-03-12 | 株式会社クラレ | ポリビニルアルコール樹脂の製造方法、及びポリビニルアルコール樹脂 |
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