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公开(公告)号：US3979479A
公开(公告)日：1976-09-07
申请号：US533267
申请日：1974-12-16
CPC分类号： C08G2/38 , C08G63/6852 , C08G69/44
摘要： A novel block copolymer HO--D--A--B--D--H, whereinA is a polylactonic block of recurring units ##EQU1## B is a polylactamic block of recurring units ##EQU2## C is a polyoxymethylene block of recurring units--CH.sub.2 O--is prepared by catalytic polymerization of at least one lactone ##EQU3## with at least one lactam ##EQU4## wherein: PM.sub.1 and PM.sub.2 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.
摘要翻译： 一种新的嵌段共聚物HO-DABDH，其中A是重复单元的聚乳酸嵌段-C（PM1）-O-- PARALLEL OB是重复单元的聚乳酸嵌段-C-（PM2）-N-- PARALLEL | OH C是重复单元-CH 2 O-的聚甲醛嵌段，其通过至少一种内酯（PM1）|| CO-O |与至少一种内酰胺（PM2），|| || | CO- -NH|其中：
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公开(公告)号：US4160789A
公开(公告)日：1979-07-10
申请号：US734932
申请日：1976-10-22
申请人： Pierino Radici , Gaudenzio Bianchi , Paolo Colombo
发明人： Pierino Radici , Gaudenzio Bianchi , Paolo Colombo
IPC分类号： C08G2/00 , C08G2/38 , C08G63/664
CPC分类号： C08G2/38 , C08G63/664
摘要： Block copolymer of the structure A-B wherein:A is a polylactone block of recurring units: ##STR1## wherein PM is a linear polymethylene chain having from 2 to 13 carbon atoms,B is a polyoxymethylene block of recurring units --CH.sub.2 O--. The block copolymer contains at least 2 wt.% of block B and at least 0.1 wt.% of block A.The block copolymer can be used as modified polyacetal when rich in block B, or as special additive for plastics materials when rich in block A.
摘要翻译： 结构A-B的嵌段共聚物，其中：
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公开(公告)号：US4003960A
公开(公告)日：1977-01-18
申请号：US642810
申请日：1975-12-22
CPC分类号： C08G2/38
摘要： Block copolymer of the structure A-B, wherein: ##STR1##A is a polylactamic block of recurring units: t,0010 WHEREIN PM is a linear polymethylene chain having from 3 to 13 carbon atoms,B is a polyoxymethylene block of recurring units [CH.sub.2 O]. The block copolymer contains at least 2 wt.% of block B and at least 0.05 wt.% of block A.The block copolymer can be used as technopolymer when rich in block B, or in the field of yarns and molded products when rich in block A.
摘要翻译： 结构A-B的嵌段共聚物，其中：A是重复单元的聚乳酸嵌段：
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公开(公告)号：US3979481A
公开(公告)日：1976-09-07
申请号：US533269
申请日：1974-12-16
申请人： Pierino Radici , Gaudenzio Bianchi , Paolo Colombo
发明人： Pierino Radici , Gaudenzio Bianchi , Paolo Colombo
IPC分类号： C08G69/00 , C08G69/44 , C08L23/00 , C08L51/00 , C08L51/02 , C08L59/00 , C08L59/02 , C08L67/00 , C08L77/00 , C08L77/12 , C08L101/00 , C08L77/02
摘要： 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: ##EQU1## B is a block of recurring units: ##EQU2## D is a block of recurring units: ##EQU3## R is an ester, ether or urethane group wherein PM.sub.1 and PM.sub.2 are linear polymethylene chains having 2 to 13 and 3 to 13 carbon atoms, respectively, 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 an acetal polymer.
摘要翻译： 一种稳定的聚合物组合物，其包含缩醛聚合物和作为稳定剂的共聚物R-D-A-B-D-R，其中：
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