Lactonic-lactamic-oxymethylene block copolymers

Details Lactonic-lactamic-oxymethylene block copolymers Lactonic-lactamic-oxymethylene block copolymers

C - Chemistry, Metallurgy

08

G

400/2011

C08G 2/38 (2006.01) C08G 63/685 (2006.01) C08G 69/44 (2006.01)

Patent

CA 1051579

ABSTRACT OF THE DISCLOSURE A novel block copolymer HO-D-A-B-D-H, wherein A is a polylactonic block of recurring units ??-(PM1)-O? B is a polylactamic block of recurring units ??-(PM2)-?? C is a polyoxymethylene block of recurring units ?CH2O? is prepared by catalytic polymerization of at least one lactone Image with at least one lactam Image , wherein: PM1 and PM2 are polymethylene linear chains having from 2 to 13 and 3 to 13 carbon atoms, respectively, and being either non-substituted or having at least one hydrogen atom replaced by an alkyl, aryl, alkylaryl or cycloalkyl radical, and reaction of the resulting A-B copolymer with monomeric formaldehyde. The block copolymer HO-D-A-B-D-H having a preponderant percentage in blocks A,B or D, respectively, behaves as a polylactone, polylactam or polyformaldehyde, respectively, having improved properties.

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