Crosslinkable coating compositions cured by a specified blend of

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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4273883, 427409, 428458, 428460, 428461, 428463, 428464, 428502, 525162, C08L 6128, B32B 1508

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active

044529457

ABSTRACT:
Coating compositions capable of curing at or near to room temperature comprise 90-50% by weight of a specified hydroxyl group-containing addition polymer, 10-50% by weight of an alkylated melamine-formaldehyde crosslinking agent and an acid catalyst consisting of a blend of a C.sub.1-4 alkylated arylsulphonic acid and a C.sub.8-14 alkylated arylsulphonic acid in amounts such that the --SO.sub.3 H group content is 0.70-2.1% of the total weight of the addition polymer and the crosslinking agent. The compositions are particularly suitable for the refinishing of automobile bodies.

REFERENCES:
patent: 4276212 (1981-06-01), Khanna et al.

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