JPS6219389B2 - - Google Patents
Info
- Publication number
- JPS6219389B2 JPS6219389B2 JP13116280A JP13116280A JPS6219389B2 JP S6219389 B2 JPS6219389 B2 JP S6219389B2 JP 13116280 A JP13116280 A JP 13116280A JP 13116280 A JP13116280 A JP 13116280A JP S6219389 B2 JPS6219389 B2 JP S6219389B2
- Authority
- JP
- Japan
- Prior art keywords
- curing
- resistance
- magnesium oxide
- silicate
- hours
- 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.)
- Expired
Links
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000000395 magnesium oxide Substances 0.000 claims description 16
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical class [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 11
- 235000010261 calcium sulphite Nutrition 0.000 claims description 11
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 10
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 7
- 239000011630 iodine Substances 0.000 claims description 7
- 229910052740 iodine Inorganic materials 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- 238000012360 testing method Methods 0.000 description 10
- 238000009835 boiling Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006253 efflorescence Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 235000019353 potassium silicate Nutrition 0.000 description 4
- 206010037844 rash Diseases 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 239000004111 Potassium silicate Substances 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229910052913 potassium silicate Inorganic materials 0.000 description 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- AUNAPVYQLLNFOI-UHFFFAOYSA-L [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O Chemical compound [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O AUNAPVYQLLNFOI-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 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
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- RGKMZNDDOBAZGW-UHFFFAOYSA-N aluminum calcium Chemical compound [Al].[Ca] RGKMZNDDOBAZGW-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- -1 various slates Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paints Or Removers (AREA)
Description
本発明は自己硬化性無機質組成物に関する。詳
細にはケイ酸アルカリをバインダーとし、硬化剤
として亜硫酸カルシウムおよびヨウ素吸着量が30
〜300mgI/g・MgOである活性酸化マグネシウムを
上記ケイ酸アルカリ中のSiO2量に対して15〜500
重量％含有させたことを特徴とする自己硬化性無
機質組成物に関する。
従来、被覆用無機質組成物としては水ガラスや
コロイダルシリカ等の水溶性あるいは水分散性の
ケイ酸質を主成分としたものが広く用いられてい
る。コロイダルシリカ、４級アンモニウムシリケ
ートやリチウムシリケートはケイ酸ソーダやケイ
酸カリに比較して耐水性に優れているが粘着性、
密着性に欠けているため一般には有機質エマルジ
ヨンを添加して使用されている。このために形成
された皮膜は耐熱性に乏しく燃焼の際には多少の
ガスを発生する。一方、ケイ酸ソーダやケイ酸カ
リは優れた密着性を示す反面、皮膜の耐水性が悪
く硬化剤を併用する必要がある。硬化剤としては
無機酸、リン酸塩、金属酸化物、水酸化物、塩化
物、ケイフツ化物、アルミン酸ソーダ、アルミノ
ケイ酸、アルミニウムカルシウム、アルミナセメ
ント、ポルトランドセメント、亜鉛末等が知られ
ている。しかしこれらの硬化剤の中で良好な耐水
性を付与するものはケイ酸ソーダやケイ酸カリと
の反応性が大きくてケイ酸塩のゲル化が速く作業
性が非常に悪い。逆に硬化時間の長いものは満足
な耐水性が得られない。最近適切な可使時間を有
し優れた密着性、接着性と共に良好な耐水性、耐
侯性、耐酸性、耐塩水性、耐有機溶剤性および機
械的強度を付与する硬化剤として亜硫酸カルシウ
ム、ケイ酸カルシウム、水酸化アルミニウム等の
混合物が提案されている（特公昭54―44285号）。
しかし上記の硬化剤を用いても皮膜の物性面にお
いて耐温水性、耐沸謄水性、耐アルカリ性、高温
高湿条件下での白華防止性に不満足な点が認めら
れた。
本発明の目的は無機質塗料等におけるこのよう
な諸欠点を改良するためのものであつてケイ酸ア
ルカリをバインダーとし、これに特定の活性酸化
マグネシウムおよび亜硫酸カルシウムの混合物を
硬化剤として加えることにより各種基材と優れた
密着性を持ち、耐沸騰水性、白華防止性など化学
的に安定な皮膜を形成し、この皮膜は機械的強
度、耐摩耗性に優れ、しかも適切な可使時間を有
する無機質組成物を提供するものである。
本発明で用いられる活性酸化マグネシウムは塩
基性炭酸マグネシウム、炭酸マグネシウム、水酸
化マグネシウム等を原料とし、これらを粒径100
μ以下に粉砕後ロータリーキルン等で300〜900℃
に加熱、軽焼しその生成物をさらにベブルミル等
で粉砕して粒度を調整して製造され、ヨウ素吸着
量が30mgI/g・MgO以上であることが必要であ
り、特に50〜200mgI/g・MgOの範囲が好ましい。
ヨウ素吸着量が30mgI/g・MgO未満の酸化マグネ
シウムはケイ酸アルカリに対して硬化作用が小さ
く満足できる耐水性が得られない。逆にヨウ素吸
着量300mgI/g・MgOをこえる活性酸化マグネシウ
ムはケイ酸アルカリとの反応速度が過大となり瞬
時にゲル化を起すのみならず、このような高活性
のものは製造が困難であつて安価に供給できな
い。ヨウ素吸着量が30〜300mgI/g・MgOの範囲の
活性酸化マグネシウムを単独でケイ酸アルカリの
硬化剤として用いた場合、皮膜の耐水性、耐沸騰
水性、耐アルカリ性、白華防止性はほぼ良好であ
るが常温硬化の場合硬化収縮、機械的強度、吸水
性、透水性、基材との付着力の点等で実用的に満
足すべき結果が得られない。しかしながら上記範
囲のヨウ素吸着量を示す活性酸化マグネシウムを
亜硫酸カルシウムを混合した硬化剤は上記の欠点
が解消され、適切な可使時間を有し、特に機械的
強度において改善されたケイ酸アルカリの常温硬
化皮膜を与える。
上記活性酸化マグネシウムと亜硫酸カルシウム
との混合硬化剤の使用量はケイ酸アルカリ中の
SiO2含量に対し15〜500重量％であり、好ましく
は20〜200重量％である。硬化剤量が500重量％を
こえると硬化速度が過大で可使時間が短く、ヘア
ラツクが生じて付着力が低下する傾向があり、15
重量％未満であると硬化不良のために耐水性、白
華防止性などの物性が劣化する。活性酸化マグネ
シウムと亜硫酸カルシウムとの混合比率は両者の
合計量に対して活性酸化マグネシウムの比率が10
〜85重量％の範囲が望ましく25〜75重量％の範囲
が一層望ましい。活性酸化マグネシウムが過剰に
なると皮膜の機械的強度が弱く各種基材との付着
力が弱くなり、また過少になると耐沸騰水性、耐
アルカリ性が悪化し可使時間が短くなる。
本発明の無機質組成物に必要に応じ添加される
他の成分は顔料、充填用、分散剤、増粘剤、消泡
剤、撥水剤、沈降防止剤等である。顔料としては
酸化チタン、酸化クロム、酸化コバルト、鉛白、
亜鉛華、リサージ、ベンガラ、群青、モリブデン
赤等の無機顔料および水分散性の有機顔料が挙げ
られ、充填剤としてはタルク、カオリン、炭酸カ
ルシウム等の無機質粉末、アスベスト、パルプ等
の繊維状物質等が挙げられる。これら顔料、充填
用、その他の添加剤の総添加量は全組成物中の約
85重量％以下が通常である。
本発明の無機質組成物を基材へ塗布するにはス
プレー、ローラー、刷毛等各種塗布方法が可能で
あり、また常温硬化性である故、塗装現場でケイ
酸アルカリ水溶液と硬化剤とを混合せしめる方法
が採用される。
すなわち、常温下で工業的に満足すべき物性を
有する塗膜が得られるが、硬化後の加熱により一
層の物性の良化、養生時間の短縮が可能である。
基材としては各種スレート、ケイ酸カルシウム
板、コンクリート等の無機材料またはアルミニウ
ム板、鉄板、ステンレス板等の金属板等が挙げら
れ塗料または接着剤として使用することができ
る。
以上述べたように本発明無機質組成物は従来提
案されていたケイ酸アルカリをバインダーとし活
性または低活性の酸化マグネシウム単独の硬化
剤、亜硫酸カルシウム単独の硬化剤、または亜硫
酸カルシウムとケイ酸カルシウム、水酸化アルミ
ニウム等との混合硬化剤を使用た無機質組成物に
比較して作業性が良好となり、硬化後の耐水性、
耐侯性、表面硬度、特に耐沸騰水性、耐熱性等に
おいて優れた効果を収めることができる。
次に実施例、比較例により本発明の自己硬化性
無機質組成物の効果を示す。下表中の部、％はい
づれも重量部、重量％である。
以下の例において試験方法は下記の通りであ
る。いずれの試験についても養生条件は20℃、60
％RHである。
(i)耐水性……養生24時間後240時間浸水し表面を
目視判定する。
(ii)性沸騰水性……養生24時間後２時間沸騰水中に
浸漬し表面を目視判定する。
(iii)耐アルカリ性……養生24時間後５％NaOH中に
24時間浸漬し表面を目視判定する。
(iv)透水性……養生24時間後、表面に直径75mmの漏
斗を逆にし、高さ250mmの水柱を立て24時間
放置後、透水量を測定する。
(v)耐洗浄性……養生24時間後、JISA6909に準じ
ブラツシング1000回後の表面を目視判定す
る。
(vi)寒熱繰返し試験……養生24時間後80℃の恒温槽
中で16時間、−20℃恒温槽中で８時間放置の
サイクルを10回繰り返し表面を目視判定す
る。
(vii)耐侯性……サンシヤイン型ウエザオメータ中に
放置500時間後表面を目視判定する。
(viii)鉛筆硬度……JISK5400により養生24時間後の
試験片を耐水試験直後の試験片について測定
する。
(ix)圧縮強度……JISA1108に準じ直径50mm、高さ
100mmの円柱形の試験体を成型７日後に測定
する。
(x)付着性……養生24時間後の試験片をそのまま、
および耐水試験直後、建研式引張り強度試験
機により引張り強度を測定する。
()可使時間……20℃の恒温室中で混合後30分
毎にJISK5402の塗料用フオードカツプで流
下時間を測定、試料がカツプより流出しなく
なるまでの時間を可使時間とする。
(i)〜(viii)および(x)の項目には厚さ４mmの石綿スレ
ート板を基材とし塗膜厚み100μの試験体を用い
た。加工方法は吹付け塗装硬化温度は20℃であ
る。
The present invention relates to self-curing inorganic compositions. In detail, alkali silicate is used as a binder, calcium sulfite is used as a hardening agent, and the amount of iodine adsorbed is 30%.
~300 mgI/g・MgO of active magnesium oxide is added to the amount of SiO2 in the alkali silicate at a concentration of 15 to 500 mgI/g・MgO.
% by weight of a self-curing inorganic composition. Conventionally, as inorganic compositions for coating, those containing water-soluble or water-dispersible silicic acid substances such as water glass and colloidal silica as a main component have been widely used. Colloidal silica, quaternary ammonium silicate, and lithium silicate have superior water resistance compared to sodium silicate and potassium silicate, but are sticky and
Since it lacks adhesion, it is generally used with the addition of an organic emulsion. The film formed for this purpose has poor heat resistance and generates some gas when burned. On the other hand, although sodium silicate and potassium silicate exhibit excellent adhesion, their films have poor water resistance and require the use of a curing agent. Known hardening agents include inorganic acids, phosphates, metal oxides, hydroxides, chlorides, silicate, sodium aluminate, aluminosilicate, aluminum calcium, alumina cement, Portland cement, and zinc powder. However, among these curing agents, those that impart good water resistance have a high reactivity with sodium silicate and potassium silicate, resulting in rapid gelation of the silicate, resulting in very poor workability. On the other hand, if the curing time is long, satisfactory water resistance cannot be obtained. Recently, calcium sulfite and silicic acid have been used as hardening agents that have appropriate pot life and provide excellent adhesion and adhesion as well as good water resistance, weather resistance, acid resistance, salt water resistance, organic solvent resistance, and mechanical strength. A mixture of calcium, aluminum hydroxide, etc. has been proposed (Special Publication No. 44285, 1983).
However, even when the above curing agent was used, it was found that the physical properties of the film were unsatisfactory in terms of hot water resistance, boiling water resistance, alkali resistance, and efflorescence prevention under high temperature and high humidity conditions. The purpose of the present invention is to improve the above-mentioned drawbacks of inorganic paints, etc. By using alkali silicate as a binder and adding a specific mixture of activated magnesium oxide and calcium sulfite as a hardening agent, various types of paints can be produced. It has excellent adhesion to the substrate and forms a chemically stable film with boiling water resistance and efflorescence resistance.This film has excellent mechanical strength and abrasion resistance, and has an appropriate pot life. The present invention provides an inorganic composition. The activated magnesium oxide used in the present invention is made from basic magnesium carbonate, magnesium carbonate, magnesium hydroxide, etc.
After grinding to below μ, 300 to 900℃ in a rotary kiln, etc.
It is manufactured by heating and lightly calcining the product, and then grinding the product in a bevel mill etc. to adjust the particle size.It is necessary that the iodine adsorption amount is 30mgI/g・MgO or more, especially 50 to 200mgI/g・A range of MgO is preferred.
Magnesium oxide with an iodine adsorption amount of less than 30 mgI/g・MgO has a small hardening effect on alkali silicate, and satisfactory water resistance cannot be obtained. On the other hand, activated magnesium oxide with an iodine adsorption amount exceeding 300 mgI/g・MgO not only reacts with an alkali silicate at an excessive rate and gels instantaneously, but it is also difficult to manufacture such highly active magnesium oxide. It cannot be supplied cheaply. When activated magnesium oxide with an iodine adsorption amount in the range of 30 to 300 mgI/g・MgO is used alone as a curing agent for alkali silicate, the film has almost good water resistance, boiling water resistance, alkali resistance, and efflorescence resistance. However, when curing at room temperature, practically satisfactory results cannot be obtained in terms of curing shrinkage, mechanical strength, water absorption, water permeability, adhesion to substrates, etc. However, a curing agent made by mixing activated magnesium oxide with calcium sulfite, which exhibits an iodine adsorption amount in the above range, overcomes the above drawbacks, has an appropriate pot life, and has improved mechanical strength, especially at room temperature. Gives a hardened film. The amount of the above mixed hardening agent of activated magnesium oxide and calcium sulfite is
It is 15 to 500% by weight, preferably 20 to 200% by weight, based on the SiO 2 content. If the amount of curing agent exceeds 500% by weight, the curing speed will be excessive, the pot life will be shortened, hair sagging will occur, and adhesion will tend to decrease.
If the amount is less than % by weight, physical properties such as water resistance and efflorescence resistance deteriorate due to poor curing. The mixing ratio of active magnesium oxide and calcium sulfite is such that the ratio of active magnesium oxide to the total amount of both is 10.
A range of 85% by weight is desirable, and a range of 25 to 75% by weight is more desirable. If activated magnesium oxide is in excess, the mechanical strength of the film will be weak and the adhesion to various substrates will be weak, and if it is too little, boiling water resistance and alkali resistance will deteriorate and pot life will be shortened. Other components that may be added to the inorganic composition of the present invention as necessary include pigments, fillers, dispersants, thickeners, antifoaming agents, water repellents, antisettling agents, and the like. Pigments include titanium oxide, chromium oxide, cobalt oxide, lead white,
Examples include inorganic pigments such as zinc white, litharge, red iron, ultramarine, and molybdenum red, and water-dispersible organic pigments.Fillers include inorganic powders such as talc, kaolin, and calcium carbonate, and fibrous substances such as asbestos and pulp. can be mentioned. The total amount of these pigments, fillers, and other additives is approximately
85% by weight or less is normal. The inorganic composition of the present invention can be applied to a substrate by various methods such as spray, roller, or brush, and since it is curable at room temperature, an aqueous alkali silicate solution and a curing agent can be mixed at the painting site. method is adopted. That is, a coating film having industrially satisfactory physical properties at room temperature can be obtained, but by heating after curing, the physical properties can be further improved and the curing time can be shortened.
Examples of the base material include inorganic materials such as various slates, calcium silicate plates, and concrete, and metal plates such as aluminum plates, iron plates, and stainless steel plates, which can be used as paints or adhesives. As described above, the inorganic composition of the present invention uses alkali silicate as a binder and active or low-activity magnesium oxide as a curing agent alone, calcium sulfite as a curing agent alone, calcium sulfite and calcium silicate, water, etc. Compared to inorganic compositions that use a mixed curing agent with aluminum oxide, etc., workability is better, and water resistance after curing is improved.
Excellent effects can be achieved in terms of weather resistance, surface hardness, especially boiling water resistance, heat resistance, etc. Next, the effects of the self-curing inorganic composition of the present invention will be shown by Examples and Comparative Examples. All parts and percentages in the table below are parts by weight and percentages by weight. In the examples below, the test method is as follows. The curing conditions for both tests were 20°C and 60°C.
%RH. (i) Water resistance: After 24 hours of curing, the surface is submerged in water for 240 hours and visually evaluated. (ii) Boiling water-based: After 24 hours of curing, immerse in boiling water for 2 hours and visually evaluate the surface. (iii) Alkali resistance...in 5% NaOH after 24 hours of curing
Soak for 24 hours and visually evaluate the surface. (iv) Water permeability: After 24 hours of curing, a funnel with a diameter of 75 mm is inverted on the surface, a water column with a height of 250 mm is placed on the surface, and the water permeability is measured after leaving it for 24 hours. (v) Washing resistance: Visually evaluate the surface after 24 hours of curing and 1000 brushings according to JISA6909. (vi) Cold/heat cycling test: After 24 hours of curing, the surface is visually judged by repeating a cycle of 16 hours in a constant temperature bath at 80°C and 8 hours in a constant temperature bath at -20°C 10 times. (vii) Weather resistance: Visually evaluate the surface after leaving it in a sunshine weather meter for 500 hours. (viii) Pencil hardness: Measure the test piece after 24 hours of curing and the test piece immediately after the water resistance test according to JISK5400. (ix) Compressive strength...Diameter 50mm, height according to JISA1108
A 100 mm cylindrical test piece is measured 7 days after molding. (x) Adhesion... After 24 hours of curing, the test piece was
Immediately after the water resistance test, the tensile strength is measured using a Kenken tensile strength testing machine. () Pot life: After mixing in a constant temperature room at 20°C, the flow time is measured every 30 minutes using a JISK5402 paint food cup, and the pot life is defined as the time until the sample no longer flows out of the cup. For items (i) to (viii) and (x), test specimens with a 4 mm thick asbestos slate board as a base material and a coating film thickness of 100 μm were used. The processing method is spray painting and the curing temperature is 20℃.
【表】【table】
【表】【table】
Claims (1)
して亜硫酸カルシウムおよびヨウ素吸着量が30〜
300mgI/g・MgOである活性酸化マグネシウムを上
記ケイ酸アルカリ中のSiO2量に対して15〜500重
量％含有させたことを特徴とする自己硬化性無機
質組成物。 ２ 亜硫酸カルシウムと活性酸化マグネシウムと
の合計量に対し亜硫酸カルシウムが90〜15重量
％、活性酸化マグネシウムが10〜85重量％である
特許請求の範囲第１項記載の自己硬化性無機質組
成物。[Claims] 1. Alkali silicate as a binder, calcium sulfite as a hardening agent, and an iodine adsorption amount of 30 to 30%.
A self-curing inorganic composition characterized in that it contains activated magnesium oxide of 300 mgI/g.MgO in an amount of 15 to 500% by weight based on the amount of SiO 2 in the alkali silicate. 2. The self-hardening inorganic composition according to claim 1, wherein the calcium sulfite content is 90 to 15% by weight and the active magnesium oxide content is 10 to 85% by weight based on the total amount of calcium sulfite and active magnesium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13116280A JPS5756364A (en) | 1980-09-19 | 1980-09-19 | Self-hardening inorganic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13116280A JPS5756364A (en) | 1980-09-19 | 1980-09-19 | Self-hardening inorganic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5756364A JPS5756364A (en) | 1982-04-03 |
| JPS6219389B2 true JPS6219389B2 (en) | 1987-04-28 |
Family
ID=15051446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13116280A Granted JPS5756364A (en) | 1980-09-19 | 1980-09-19 | Self-hardening inorganic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5756364A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175768A (en) * | 1981-04-20 | 1982-10-28 | Osaka Soda Co Ltd | Water-soluble powder composition |
| JPS5925843A (en) * | 1982-07-16 | 1984-02-09 | Osaka Soda Co Ltd | Seawater-resistant antifouling coating composition |
| JPS6050066U (en) * | 1983-09-16 | 1985-04-08 | 尾崎 鎗次 | parking device |
| EP1254083B1 (en) * | 2000-01-27 | 2011-08-03 | Tececo Pty Ltd | Process for preparing reactive magnesium oxide cements |
| WO2014052072A1 (en) * | 2012-09-26 | 2014-04-03 | 3M Innovative Properties Company | Coatable composition, soil-resistant composition, soil-resistant articles, and methods of making the same |
-
1980
- 1980-09-19 JP JP13116280A patent/JPS5756364A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5756364A (en) | 1982-04-03 |
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