EP0237997A1
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EP
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Thermosetting resins and electrodeposition coating compositions containing the same
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1987-03-14
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Granted: —
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Expires: 2007-03-14
Abstract
Abstract A thermosetting resin which contains therein:(a) groups represented by the formula of(b) hydroxyl groups; and(c) quaternary ammonium salt groups which solubilize the resin in water;the blocked NCO groups being stable in the presence of water, but reactive with the hydroxyl groups at elevated temperatures.The resin is suitably used for cationic electrodeposition coating composition, which is especially low temperature curable, and provides coatings excellent in weatherability and corrosion resistance.
Inventors
- 👤 Kohji Nasu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/18; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4496; C08F; C08F8/00; C08F8/44; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/40; C08G18/58; C08G18/584; C08G18/64; C08G18/6415; C08G18/643; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7628; C08G18/765; C08G18/80; C08G18/8061; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A thermosetting resin which contains therein: (a) groups represented by the formula of (b) hydroxyl groups; and (c) quaternary ammonium salt groups which solubilize the resin in water; the blocked NCO groups being stable in the presence of water, but reactive with the hydroxyl groups at elevated temperatures.
Claim 2
Dependent Claim
48 words
A thermosetting resin which contains therein: (a) groups represented by the formula of (b) hydroxyl groups; and (c) quaternary ammonium salt groups which solubilize the resin in water; the blocked NCO groups being stable in the presence of water, but reactive with the hydroxyl groups at elevated temperatures.
Claim 3
Independent Claim
100 words
A method for producing a thermosetting resin which comprises: (a) reacting half-blocked α, α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group with an epoxy group containing compound having at least one hydroxyl group; (b) reacting the reaction product with an amine having active hydrogens to form a product which has amino groups therein; and (c) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 4
Independent Claim
100 words
A method for producing a thermosetting resin which comprises: (a) reacting half-blocked α, α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group with an epoxy group containing compound having at least one hydroxyl group; (b) reacting the reaction product with an amine having active hydrogens to form a product which has amino groups therein; and (c) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 5
Independent Claim
93 words
A method for producing a thermosetting resin which comprises: (a) reacting an epoxy group containing compound with an amine having active hydrogens to form a product which has amino groups therein; (b) reacting the product with half-blocked α, α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group; and (c) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 6
Independent Claim
93 words
A method for producing a thermosetting resin which comprises: (a) reacting an epoxy group containing compound with an amine having active hydrogens to form a product which has amino groups therein; (b) reacting the product with half-blocked α, α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group; and (c) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 7
Independent Claim
107 words
A method for producing a thermosetting resin which comprises: (a) reacting half-blocked α,α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group with an unsaturated monomer having hydroxyl groups; (b) copolymerizing the resultant reaction product with an unsaturated monomer having epoxy groups; (c) reacting the resulting copolymer with an amine having active hydrogens to form a product which has amino groups therein; and (d) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 8
Independent Claim
107 words
A method for producing a thermosetting resin which comprises: (a) reacting half-blocked α,α, αʹ, αʹ-tetramethylxylylene diisocyanate or a prepolymer of α, α, αʹ, αʹ-tetramethylxylylene diisocyanate having at least one half-blocked isocyanate group and at least one free isocyanate group with an unsaturated monomer having hydroxyl groups; (b) copolymerizing the resultant reaction product with an unsaturated monomer having epoxy groups; (c) reacting the resulting copolymer with an amine having active hydrogens to form a product which has amino groups therein; and (d) reacting the product with an acid to convert at least part of the amino groups to quaternary ammonium salts, thereby to solubilize the product in water.
Claim 9
Dependent Claim
64 words
A cationic electrodeposition coating composition which comprises a thermosetting resin containing therein: (a) groups represented by the formula of (b) hydroxyl groups; and (c) quaternary ammonium salt groups which solubilize the resin in water; the blocked NCO groups being stable in the presence of water, but reactive with the hydroxyl groups at elevated temperatures, solubilized in water, hydrophilic organic solvents or mixtures of these.
Claim 10
Dependent Claim
64 words
A cationic electrodeposition coating composition which comprises a thermosetting resin containing therein: (a) groups represented by the formula of (b) hydroxyl groups; and (c) quaternary ammonium salt groups which solubilize the resin in water; the blocked NCO groups being stable in the presence of water, but reactive with the hydroxyl groups at elevated temperatures, solubilized in water, hydrophilic organic solvents or mixtures of these.
References Cited (Backward Citations)
FR2211542A1
Cited
EP0000029B1
Cited
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