Patent ID: 6197866
Filing Date: 2001-03-06
Classification: C08L,C09D

Abstract:
Aqueous painting composition containing from 55 to 70% by weight of fluoropolymers belonging to the fluoroelastomers class, wherein said composition comprises a partially fluorinated non ionic polymeric compound as a thickening additive having the following general formula (I) ##STR7##in whichn is a number ranging from 4 to 60; L and L' are equal or different and are selected from: ##STR8##in whichP is 0 or 1, Y is F or CF.sub.3 and R' is an alkyl radical C.sub.1 -C.sub.5 ;R.sub.1 and R.sub.2 are both H or one is H and the other of R.sub.1 and R.sub.2 is CH.sub.3 ;R.sub.f and R.sub.f"" are equal or different and are perfluoropolyether radicals having a number average molecular weight ranging from 250 to 1500 and they comprise a T terminal and repetitive units statistically distributed along the polymer chain selected from: ##STR9##wherein X is F or --CF.sub.3 ;--CF.sub.2 (CF.sub.2).sub.z O wherein z is a number equal to 2 or 3;--CF.sub.2 CF(OR.sub.f')O-- or --CF(OR.sub.f')O-- wherein R.sub.f' is --CF.sub.3, --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7, said T terminal being selected from: --CF .sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7, ClCF.sub.2 CF(CF.sub.3)--, CF.sub.3 CFClCF.sub.2 --, ClCF.sub.2 CF.sub.2 -- and ClCF.sub.2 --.