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公开(公告)号:US5317064A
公开(公告)日:1994-05-31
申请号:US989048
申请日:1992-12-11
申请人: Maria Spinu
发明人: Maria Spinu
摘要: Polylactide stereocomplex is formed by mixing poly-D-lactide and L-lactide or poly-L-lactide and D-lactide and a lactide polymerization catalyst, and heating to polymerize the monomeric lactide, preferably under pressure. The parts are useful in medical devices such as bone screws.
摘要翻译: 聚丙交酯立体络合物通过混合聚-D-丙交酯和L-丙交酯或聚-L-丙交酯和D-丙交酯和丙交酯聚合催化剂形成,并且加热以优选在压力下聚合单体丙交酯。 这些部件在诸如骨螺钉的医疗装置中是有用的。
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公开(公告)号:US5210108A
公开(公告)日:1993-05-11
申请号:US922269
申请日:1992-07-29
申请人: Maria Spinu , Thomas M. Ford
发明人: Maria Spinu , Thomas M. Ford
CPC分类号: C08G63/08 , C08J9/12 , C08J9/146 , Y10S521/916
摘要: Environmentally benign closed cell compositions made by foaming star-shaped polymers with a plurality of poly(hydroxy acid) chains attached to a central polyfunctional compound having a plurality of hydroxyl and/or amino groups.
摘要翻译: 通过将具有多个连接到具有多个羟基和/或氨基的中心多官能化合物的多个(羟基酸)链发泡的星形聚合物制成的环境良性闭孔组合物。
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公开(公告)号:US20060159907A1
公开(公告)日:2006-07-20
申请号:US11295804
申请日:2005-12-07
申请人: Simona Percec , Maria Spinu , Irene Plotzker
发明人: Simona Percec , Maria Spinu , Irene Plotzker
CPC分类号: D01D5/11 , D06M15/00 , D06M16/00 , Y10T428/249953 , Y10T428/249955 , Y10T428/249978 , Y10T428/249987
摘要: This invention relates to ultramicrocellular structures that incorporate fillers such as functional fillers.
摘要翻译: 本发明涉及掺入填充剂如功能填料的超微细胞结构。
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公开(公告)号:US06555631B1
公开(公告)日:2003-04-29
申请号:US09672612
申请日:2000-09-28
申请人: Lin Wang , Maria Spinu , Joel David Citron
发明人: Lin Wang , Maria Spinu , Joel David Citron
IPC分类号: C08F464
CPC分类号: C08F10/02 , C08F4/61904 , C08F4/65912 , C08F4/65916 , C08F4/65927 , C08F10/00 , C08F110/02 , C08L23/0815 , C08L2205/02 , C08L2314/06 , C08F4/025 , C08L2666/04 , C08F2500/10 , C08F2500/04 , C08F4/7042
摘要: Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms &agr;-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and &agr;-olefins, and the other of which under process conditions does not readily copolymerize ethylene and &agr;-olefins. The blends may have improved physical properties and/or processing characteristics.
摘要翻译: 两种或更多种聚乙烯的共混物是通过乙烯与形成α-烯烃的低聚催化剂反应制得的,两种聚合催化剂,其中一种在工艺条件下共聚乙烯和α-烯烃,另一种在工艺条件下不是 容易使乙烯和α-烯烃共聚。 共混物可具有改善的物理性能和/或加工特性。
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公开(公告)号:US5270400A
公开(公告)日:1993-12-14
申请号:US816433
申请日:1991-12-31
申请人: Maria Spinu
发明人: Maria Spinu
IPC分类号: C08G63/08 , C08G63/664
CPC分类号: C08G63/664 , C08G63/08
摘要: Linear block copolymers are disclosed. The polymers comprise a plurality of alternating polymeric blocks of amorphous copolymers of L-lactide and D-lactide with semicrystalline blocks of either L-lactide homopolymer or D-lactide homopolymer. The molecular weight can be built up by either of two techniques. The first technique is to use a chain extending agent such as a diacyl chloride or a diisocyanate to link a plurality of the preformed block copolymers. The second technique is to polymerize additional alternating amorphous and semicrystalline onto the original alternating block copolymers.
摘要翻译: 公开了线性嵌段共聚物。 聚合物包含多个交替的L-丙交酯和D-丙交酯与L-丙交酯均聚物或D-丙交酯均聚物的半结晶嵌段的无定形共聚物的聚合物嵌段。 分子量可以通过两种技术之一来构建。 第一种技术是使用双链酰氯或二异氰酸酯等增链剂连接多个预制嵌段共聚物。 第二种技术是将另外的交替的无定形和半结晶聚合到原始的交替嵌段共聚物上。
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公开(公告)号:US06921795B2
公开(公告)日:2005-07-26
申请号:US10359336
申请日:2003-02-06
申请人: Lin Wang , Maria Spinu , Joel David Citron
发明人: Lin Wang , Maria Spinu , Joel David Citron
IPC分类号: C08F4/602 , C08F4/619 , C08F4/645 , C08F4/659 , C08F4/6592 , C08F4/70 , C08F10/00 , C08F10/02 , C08F110/02 , C08L23/08 , C08L23/06
CPC分类号: C08F10/02 , C08F4/61904 , C08F4/65912 , C08F4/65916 , C08F4/65927 , C08F10/00 , C08F110/02 , C08L23/0815 , C08L2205/02 , C08L2314/06 , C08F4/025 , C08L2666/04 , C08F2500/10 , C08F2500/04 , C08F4/7042
摘要: Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms α-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and α-olefins, and the other of which under process conditions does not readily copolymerize ethylene and α-olefins. The blends may have improved physical properties and/or processing characteristics.
摘要翻译: 两种或更多种聚乙烯的共混物是通过乙烯与形成α-烯烃的低聚催化剂反应制得的,两种聚合催化剂,其中一种在工艺条件下共聚乙烯和α-烯烃,另一种在工艺条件下不是 容易使乙烯和α-烯烃共聚。 共混物可具有改善的物理性能和/或加工特性。
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公开(公告)号:US5331045A
公开(公告)日:1994-07-19
申请号:US17234
申请日:1993-02-12
申请人: Maria Spinu
发明人: Maria Spinu
CPC分类号: C08F8/14
摘要: Polyvinyl alcohol esterified by lactic is produced by dissolving polyvinyl alcohol and lactic acid in water, and removing the water by volatilization at a temperature of 75.degree. C. to 175.degree. C. The lactic acid esterified polyvinyl alcohol is useful as a molding resin, and in films, fibers and adhesives.
摘要翻译: 用乳酸酯化的聚乙烯醇是通过将聚乙烯醇和乳酸溶于水中制得的,并在75℃至175℃的温度下通过挥发除去水分。乳酸酯化的聚乙烯醇可用作模制树脂,和 在薄膜,纤维和粘合剂中。
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公开(公告)号:US5202413A
公开(公告)日:1993-04-13
申请号:US816201
申请日:1991-12-31
申请人: Maria Spinu
发明人: Maria Spinu
IPC分类号: C08G63/06 , C08G20060101 , C08G18/42 , C08G18/46 , C08G18/60 , C08G18/61 , C08G63/08 , C08G63/60 , C08G63/66 , C08G63/664 , C08G63/685 , C08G63/695 , C08G77/445 , C08L101/16
CPC分类号: C08G18/428 , C08G18/4286 , C08G63/08 , C08G63/60 , C08G63/664 , C08G77/445
摘要: Polymers of the general formula R--(A-B-A-I)-.sub.x A-B-A-R and their preparation are disclosed. In the general formula, -A- is a polyhydroxy acid residue preferably a polymer of either 98 to 100% L-lactide or 98 to 100% D-lactide having a molecular weight of 500 to 40,000 and preferably 2,000 to 20,000, -B- is an oligomeric diol or diamine residue, having a number average molecular weight of 500 to 20,000 and preferably 2,000 to 8,000. The polymers are prepared by polymerizing a lactone onto the diol or diamine followed by reacting the resulting polymeric H-A-B-A-H with an diisocyanate or diacyl chloride to form the -L- chain extending units in the general formula.
摘要翻译: 公开了通式R-(A-B-A-I)-xA-B-A-R的聚合物及其制备方法。 在通式中,-A-是多羟基酸残基,优选分子量为500至40,000,优选2,000至20,000,-B-的交联剂的98至100%的L-丙交酯或98至100%的D-丙交酯的聚合物, 是数均分子量为500〜20,000,优选为2,000〜8,000的低聚二醇或二胺残基。 通过将内酯聚合到二醇或二胺上制备聚合物,然后使得到的聚合物H-A-B-A-H与二异氰酸酯或二酰氯反应,形成通式中的-L-延伸单元。
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公开(公告)号:US20060157882A1
公开(公告)日:2006-07-20
申请号:US11296177
申请日:2005-12-07
申请人: Simona Percec , Maria Spinu
发明人: Simona Percec , Maria Spinu
IPC分类号: B29C44/04
CPC分类号: C08J9/40 , B29C67/202
摘要: This invention relates to ultramicrocellular structures that incorporate fillers such as functional fillers.
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公开(公告)号:US06297330B1
公开(公告)日:2001-10-02
申请号:US09347840
申请日:1999-07-02
IPC分类号: C08G6378
CPC分类号: C08G63/78 , C08G63/181 , C08G63/84 , C08G63/85
摘要: This invention concerns a process for polymerizing cyclic oligomers to homopolymers or copolymers, conducted in the presence of one or more linear polymers.
摘要翻译: 本发明涉及将环状低聚物聚合成均聚物或共聚物的方法,其在一种或多种线性聚合物的存在下进行。
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