Stabilization of acetal polymers

Details Stabilization of acetal polymers Stabilization of acetal polymers

C - Chemistry, Metallurgy

08

L

400/3018

C08L 59/00 (2006.01) C08L 59/02 (2006.01) C08L 77/12 (2006.01)

Patent

CA 1043037

ABSTRACT OF THE DISCLOSURE A stabilized polymeric composition comprising an acetal polymer and as stabilizer a copolymer R-D-A-B-D-R, in which: - A is a block of recurring units: Image - B is a block of recurring units: Image - D is a block of recurring units: Image - R is an ester, ether or urethane group where PM1 and PM2 are linear polymerthylene chains having 2 to 13 and 3 to 13 carbon atoms, non substituted or having at least one hydrogen atom replaced by an alkyl, aryl, alkylaryl or cycloalkyl radical; the said stabilizer being used in a proportion of from 0.02 to 12 parts by weight to 100 parts by weight acetal polymer. The composition con be used for the manufacture of mechanical components and containers for pharmaceuticals.

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