Process for the preparation of storage-stable polyamidoimide...

Details Process for the preparation of storage-stable polyamidoimide... Process for the preparation of storage-stable polyamidoimide...

2005-07-28

2010-10-26

Woodward, Ana L (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S420000, C525S424000, C525S434000, C525S436000, C525S452000

Reexamination Certificate

active

07820768

ABSTRACT:
Process for the preparation of polyamidoimide resins, in which the centers of the polyamidoimide resins which are reactive toward moisture are reacted with one or more compounds of the following general H—X—R1, in which, where X=oxygen, R1is a straight-chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aralkyl group and, where X═NR2, R1is a straight-chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aralkyl group or an aryl group and R2is a straight-chain or branched alkyl group having 1 to 6 carbon atoms, an aralkyl group or an aryl group, or R1and R2together form a cycloalkyl radical having 4 or 5 methylene groups, it being possible for a methylene group to be replaced by oxygen or an NR3group, and R3being a straight-chain or branched alkyl group having 1 to 3 carbon atoms, and polyamidoimide coating materials which are prepared by the process.

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