Tertiary carboxyl-functional polyester derived from cyclohexane dicarboxylic acid and dihydroxymono carboxylic acid
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United States of America Patent
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Mar 13, 2001
Grant Date -
N/A
app pub date -
Nov 25, 1997
filing date -
Dec 2, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Linear, tertiary carboxyl functional polyester resins are obtained by reaction of (a) at least one 1,4-dicarboxylcyclohexane (A), optionally mixed with a minor weight fraction of an alkane dicarboxylic acid containing in the range of from 8 to 16 carbons atoms (A'), (b) at least one dihydroxymonocarboxylic acid compound (B) containing a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, (c) optionally, one diol compound (C) containing two aliphatic hydroxyl groups, each independently being a primary or a secondary hydroxyl group, and (d) optionally, a compound (D') containing one monofunctional primary or secondary hydroxyl group and/or a compound (D') containing one primary or secondary hydroxyl group and one tertiary aliphatic carboxyl group, the molar ratio of the compounds (A+A'):B:C:D':D' being X+Y+1:Y:X:M:N wherein M+N is in the range of from 0 to 2, wherein X ranges from 2 to 8, and Y ranges from [2-(M+N)] to 8, at a temperature of from 100 to 225 .degree. C., until essentially all the non-tertiary carboxyl groups as initially present in the reaction mixture have been reacted; polyglycidylesters derived from said polyester resins; and coating compositions comprising at least one polyester resin and/or at least one polyglycidylester resin.
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