Polyhydroxy oligomers for high solids coatings II

专利名称：Polyhydroxy oligomers for high solids

coatings II

发明人：Mohinder S. Chattha申请号：US06/334801申请日：19811228公开号：US04465815A公开日：19840814

摘要：A novel polyhydroxy oligomer crosslinkable with amine-aldehyde to form acoating composition adapted for use as an automotive topcoat which upon curing forms ahard, glossy, durable coating with outstanding weatherability and excellent resistance tosolvents and water. The coating composition comprises:

(A) a polyhydroxy oligomer having a number average (M.sub.n) molecular weight ofbetween about 300-2000 and being the reaction product of:

(i) an acid ester made by reacting

(a) a C.sub.3 -C.sub.10 aliphatic branched diol, and

(b) an alkyl hexahydrophthalic anhydride, wherein (a) and (b) are combined in thereaction mixture in amounts and under conditions sufficient to result in reaction in amolar ratio of greater than 1:1 up to 1:2; and

< P>(ii) a monoepoxide C.sub.2 -C.sub.10 monomer, the monomer is included in anamount sufficient to provide reaction of about 1.0 epoxide groups for each acid group ofthe acid ester;

(B) an amine-aldehyde crosslinking agent; and

(C) optionally a hydroxy functional additive.

The amine-aldehyde crosslinking agent is included in the composition in an amountsufficient to provide at least about 0.60 equivalents of nitrogen crosslinking functionalityfor each equivalent of hydroxyl functionality included in the composition either on thepolyhydroxy oligomer or as a hydroxyl group of the hydroxy functional additive.

申请人：FORD MOTOR COMPANY

代理人：Lorraine S. Melotik,Roger L. May

更多信息请下载全文后查看