Abstract Organic solvent-soluble thermosetting acrylic interpolymers uniquely adapted for coil coating application are provided by interpolymerizing from 6%-15% acrylamide or methacrylamide with from 10%-35% of polyethylenically unsaturated polyester having an hydroxy value of 150-350, from 30%-60% of isobutyl acrylate, from 10%-22% of styrene or vinyl toluene, and from 2%-15% methyl methacrylate. The amide component is methylolated and the interpolymer is provided with an acid number of from 3-20 in order to provide a rapid curing system which will have the gloss, flexibility, hardness and solvent resistance required for coil coating application and which will, nonetheless, provide superior flow and wetting characteristics.
Inventors
👤 Kazys Sekmakas
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 04:31
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
An interpolymer as recited in claim 1 in which the total of styrene, vinyl toluene and methyl methacrylate does not exceed 25%.
Claim 2
Dependent Claim
18 words
An interpolymer as recited in claim 1 in which said interpolymer includes from 0.3%-1.5% of unsaturated carboxylic acid.
Claim 3
Dependent Claim
25 words
An interpolymer as recited in claim 1 in which said interpolymer includes from 9%-13% of acrylamide or methacrylamide and from 15%-25% of said hydroxy-functional polyester.
Claim 4
Dependent Claim
17 words
An interpolymer as recited in claim 4 in which said interpolymer includes from 40%-55% of isobutyl acrylate.
Claim 5
Dependent Claim
26 words
An interpolymer as recited in claim 5 in which said interpolymer includes from 0.6%-1.0% of unsaturated carboxylic acid and has an acid number of from 8-15.
Claim 6
Dependent Claim
18 words
An interpolymer as recited in claim 6 in which said hydroxy-functional polyester has an hydroxy value of 200-300.
Claim 7
Dependent Claim
32 words
An interpolymer as recited in claim 1 in which said hydroxy-functional polyester has a viscosity in n-butanol at 80% solids in the range of T to Z2 measured on the Gardner scale.
Claim 8
Dependent Claim
19 words
A thermosetting organic solvent solution coil coating composition comprising organic solvent having dissolved therein the interpolymer of claim 1.