Stabilization of acetal polymers

Details Stabilization of acetal polymers Stabilization of acetal polymers

C - Chemistry, Metallurgy

08

G

400/3012

C08G 2/00 (2006.01) C08K 5/13 (2006.01) C08L 59/02 (2006.01) C08L 77/02 (2006.01)

Patent

CA 1046685

ABSTRACT OF THE DISCLOSURE A stabilized composition comprising an acetal polymer and from 0.02 to 12 parts by weight to 100 parts by weight of acetal polymer of a block copolymer of the general structure A-B-R, wherein: A is a polylactamic block of recurring units: Image wherein PM is a linear polymethylene chain having from 3 to 13 carbon atoms, B is a polyoxymethylene block of recurring units Image R is a terminal ester, ether or urethane Group.With respect to the conventional polyamides, the A-B-R stabilizer shows a greater stabilizing effect, a greater compatibility with the acetal polymer and is not extractable by aqueous or organic solutions. The composition of this invention, stabilized against oxidation and thermal degradation, may by used for the production of molded articles, and especially for the manufacture of mechanical components and of containers for pharmaceutical products and foodstuffs.

241983

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