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1. 发明授权

US5717056A Method for preparing polycarbonate by solid state polymerization 失效
标题翻译：通过固态聚合制备聚碳酸酯的方法
公开(公告)号：US5717056A
公开(公告)日：1998-02-10
申请号：US767740
申请日：1996-12-17
申请人： Godavarthi Satyanarayana Varadarajan , Swaminathan Sivaram , Bhaskar Bhairavnath Idage , Joseph Anthony King, Jr.
发明人： Godavarthi Satyanarayana Varadarajan , Swaminathan Sivaram , Bhaskar Bhairavnath Idage , Joseph Anthony King, Jr.
IPC分类号： C08G64/14 , C08G64/20 , C08G64/30 , C08G64/42 , C08G64/00
CPC分类号： C08G64/42 , C08G64/14 , C08G64/20 , C08G64/307
摘要： Solid state polycarbonate formation comprises an initial step of converting a precursor polycarbonate to an enhanced crystallinity precursor polycarbonate and a second step of polymerizing said enhanced crystallinity precursor polycarbonate in the solid state. Several options are employed. These include modifying the precursor polycarbonate by contact with a dihydroxy compound or diaryl carbonate, conversion of the precursor polycarbonate to the enhanced crystallinity polymer by contact with at least one compound selected from the group consisting of alkali metal hydroxides, tetraalkylammonium hydroxides, tetraalkylammonium carboxylates, tetraalkylphosphonium hydroxides and tetraalkylphosphonium carboxylates, and conducting the solid state polymerization in the presence of a catalytic amount of at least one tetralkylammonium or tetraalkylphosphonium carboxylate. The preferred tetralkylammonium compounds are tetramethylammonium maleate and tetramethylammonium hydroxide. Polymerization may be conducted in the presence of a solvent resistance-imparting monomer such as hydroquinone or resorcinol or a branching agent such as 1,1,1-tris(4-hydroxyphenyl)ethane.
摘要翻译：固体聚碳酸酯形成包括将前体聚碳酸酯转化为增强的结晶度前体聚碳酸酯的初始步骤和将固体状态的所述增强的结晶度前体聚碳酸酯聚合的第二步骤。采用了几个选项。这些包括通过与二羟基化合物或碳酸二芳基酯接触来改性前体聚碳酸酯，通过与至少一种选自碱金属氢氧化物，四烷基铵氢氧化物，四烷基铵羧酸盐，四烷基鏻盐的化合物接触，将前体聚碳酸酯转化为增强的结晶度聚合物氢氧化物和四烷基鏻羧酸盐，并在催化量的至少一种四烷基铵或四烷基鏻羧酸盐的存在下进行固态聚合。优选的四烷基铵化合物是马来酸四甲基铵和氢氧化四甲基铵。聚合可以在耐溶剂性单体如氢醌或间苯二酚或支化剂如1,1,1-三（4-羟基苯基）乙烷的存在下进行。

2. 发明授权

US6034142A Method for recycling aromatic polycarbonates 失效
标题翻译：芳烃聚碳酸酯的回收方法
公开(公告)号：US6034142A
公开(公告)日：2000-03-07
申请号：US989458
申请日：1997-12-12
申请人： Godavarthi Satyanarayana Varadarajan , Joseph Anthony King, Jr. , Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Vishnu Ramchandra Ranade
发明人： Godavarthi Satyanarayana Varadarajan , Joseph Anthony King, Jr. , Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Vishnu Ramchandra Ranade
IPC分类号： C08J11/08 , C08J11/04 , C08J11/20
CPC分类号： C08J11/08 , C08J2369/00 , Y02W30/701
摘要： Polycarbonates are recycled without the need for chemical modification by dissolution in a solvent followed by removal of any insoluble materials and precipitation by addition of a non-solvent. The precipitation step may be followed by solid state polymerization of the recycled polycarbonate. Particularly when solid state polymerization is to be performed, the use of a combination of solvent and non-solvent which produces a crystalline intermediate is performed, and use of a modifying reagent increasing the hydroxy end group concentration of the polycarbonate may be advantageous.
摘要翻译：聚碳酸酯被再循环，而不需要通过溶解在溶剂中进行化学改性，然后除去任何不溶物并通过加入非溶剂沉淀。沉淀步骤之后可以再循环聚碳酸酯的固态聚合。特别是当进行固态聚合时，进行使用产生结晶中间体的溶剂和非溶剂的组合，并且使用增加聚碳酸酯的羟基端基浓度的改性剂可能是有利的。

3. 发明授权

US6143859A Copolycarbonate preparation by solid state polymerization 有权
标题翻译：通过固态聚合制备共聚碳酸酯
公开(公告)号：US6143859A
公开(公告)日：2000-11-07
申请号：US370433
申请日：1999-08-09
申请人： Gautam Chatterjee , Godavarthi Satyanarayana Varadarajan , James Day , Patrick Joseph McCloskey , Bhaskar Bhairavnath Idage , Joseph Anthony King, Jr. , Arun Savalaram Jadhav
发明人： Gautam Chatterjee , Godavarthi Satyanarayana Varadarajan , James Day , Patrick Joseph McCloskey , Bhaskar Bhairavnath Idage , Joseph Anthony King, Jr. , Arun Savalaram Jadhav
IPC分类号： C08G64/06 , C08G64/18 , C08G64/20 , C08G64/00
CPC分类号： C08G64/20 , C08G64/06 , C08G64/183
摘要： Copolycarbonates containing such structural units as birefringence-reducing or "soft block" units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.
摘要翻译：通过在前体聚碳酸酯和单体，聚碳酸酯低聚物或高分子量聚碳酸酯之间进行诸如熔融聚合或平衡的反应来制备含有诸如双折射降低或“软嵌段”单元的结构单元的共聚碳酸酯结构单位。得到的前体共聚碳酸酯或其制备中使用的试剂之一的结晶度提高，前体共聚碳酸酯进行固态聚合。

4. 发明授权

US06333394B1 Copolycarbonate preparation by solid state polymerization 有权
标题翻译：通过固态聚合制备共聚碳酸酯
公开(公告)号：US06333394B1
公开(公告)日：2001-12-25
申请号：US09379234
申请日：1999-08-23
申请人： Christian Maria Emile Bailly , Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Nayaku Nivarati Chavan , Rein Mollerus Faber , Shamal Karunakaran Menon , Gautam Chatterjee , Godavarthi Satyana Varadarajan , James Day , Patrick Joseph McCloskey , Joseph Anthony King, Jr. , Arun Savalaram Jadhav
发明人： Christian Maria Emile Bailly , Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Nayaku Nivarati Chavan , Rein Mollerus Faber , Shamal Karunakaran Menon , Gautam Chatterjee , Godavarthi Satyana Varadarajan , James Day , Patrick Joseph McCloskey , Joseph Anthony King, Jr. , Arun Savalaram Jadhav
IPC分类号： C08G6400
CPC分类号： C08G64/20 , C08G64/06 , C08G64/14 , C08G64/183 , C08G64/307
摘要： Copolycarbonates containing such structural units as birefringence-reducing or “soft block” units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.
摘要翻译：通过在前体聚碳酸酯和单体，聚碳酸酯低聚物或高分子量聚碳酸酯之间进行诸如熔融聚合或平衡的反应来制备含有诸如双折射降低或“软嵌段”单元的结构单元的共聚碳酸酯结构单位。得到的前体共聚碳酸酯或其制备中使用的试剂之一的结晶度提高，前体共聚碳酸酯进行固态聚合。

5. 发明授权

US5905135A Method of preparing polycarbonates by solid state polymerization 失效
标题翻译：通过固态聚合制备聚碳酸酯的方法
公开(公告)号：US5905135A
公开(公告)日：1999-05-18
申请号：US986448
申请日：1997-12-08
申请人： Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Godavarthi Satyanaryana Varadarajan , Joseph Anthony King, Jr.
发明人： Bhaskar Bhairavnath Idage , Swaminathan Sivaram , Godavarthi Satyanaryana Varadarajan , Joseph Anthony King, Jr.
IPC分类号： C08G64/30 , C08G64/40 , C08G64/00
CPC分类号： C08G64/40 , C08G64/30
摘要： Crystallization of precursor polycarbonates prior to solid state polymerization is achieved by contact with a non-solvent comprising, at least in part, a dialkyl carbonate such as dimethyl carbonate. The non-solvent can be a mixture, typically of dimethyl carbonate with water or an alkanol such as methanol.
摘要翻译：在固态聚合之前，前体聚碳酸酯的结晶通过与至少部分由碳酸二烷基酯如碳酸二甲酯组成的非溶剂的接触来实现。非溶剂可以是通常为碳酸二甲酯与水或链烷醇如甲醇的混合物。

6. 发明授权

US5714567A Process for the preparation of aromatic polyesters 失效
标题翻译：芳香族聚酯的制备方法
公开(公告)号：US5714567A
公开(公告)日：1998-02-03
申请号：US602023
申请日：1996-02-15
申请人： Bhaskar Bhairavnath Idage , Sudhakar Sadashiv Mahajan , Swaminathan Sivaram
发明人： Bhaskar Bhairavnath Idage , Sudhakar Sadashiv Mahajan , Swaminathan Sivaram
IPC分类号： C08G63/19 , C08G63/80 , C08G63/88 , C08G63/00
CPC分类号： C08G63/80 , C08G63/19 , C08G63/88
摘要： An improved process for the preparation of aromatic polyesters, whereby dialkyl esters of aromatic dicarboxylic acids are melt-polymerized with aromatic bisphenol to furnish an amorphous poly(arylester) prepolymer. The amorphous poly(arylester) prepolymer is crystallized, separated, and dried to provide a crystallized poly(arylester) prepolymer, which is heated to yield the aromatic polyester.
摘要翻译：制备芳族聚酯的改进方法，其中芳族二羧酸的二烷基酯与芳族双酚熔融聚合以提供无定形聚（芳基酯）预聚物。无定形聚（芳基酯）预聚物结晶，分离和干燥，得到结晶的聚（芳基酯）预聚物，将其加热得到芳族聚酯。

7. 发明授权

US08633294B2 Lactic acid-isosorbide copolyesters and process for the preparation thereof 有权
标题翻译：乳酸 - 异山梨醇共聚酯及其制备方法
公开(公告)号：US08633294B2
公开(公告)日：2014-01-21
申请号：US13690877
申请日：2012-11-30
申请人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
发明人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
IPC分类号： C08G64/00 , C08G63/02
CPC分类号： C08G63/664 , C08G63/80 , C08G63/81 , C08G63/912
摘要： Copolyester with improved transition temperature, melting temperature and crystallinity including units derived from lactic acid and isosorbide, where the ratio of lactic acid to isosorbide ranges from 99:1 to 50:50.
摘要翻译：具有改进的转变温度，熔融温度和结晶度的共聚酯包括衍生自乳酸和异山梨醇的单元，其中乳酸与异山梨酸的比例为99:1至50:50。

8. 发明授权

US08895760B2 Process for the preparation of L-lactide of high chemical yield and optical purity 有权
标题翻译：制备高产率和光学纯度的L-丙交酯的方法
公开(公告)号：US08895760B2
公开(公告)日：2014-11-25
申请号：US13595627
申请日：2012-08-27
申请人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
发明人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
IPC分类号： C07D319/00 , C07D319/12
CPC分类号： C07D319/12
摘要： A process for the synthesis of 100% optically pure L(+)-lactide catalyzed by zinc and tin metal catalysts of less than 150 micron particle size is disclosed. The L-lactide obtained was further purified to obtain lactide of 100% optical purity and acid impurities less than 10 meq/kg.
摘要翻译：公开了一种由小于150微米粒度的锌和锡金属催化剂催化的合成100％光学纯的L（+） - 丙交酯的方法。获得的L-丙交酯进一步纯化，得到100％光学纯度和小于10meq / kg的酸性杂质的丙交酯。

9. 发明申请

US20130060051A1 Process For The Preparation Of L-Lactide Of High Chemical Yield And Optical Purity 有权
标题翻译：高效化学产物和光学纯度的L-丙交酯的制备方法
公开(公告)号：US20130060051A1
公开(公告)日：2013-03-07
申请号：US13595627
申请日：2012-08-27
申请人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
发明人： Bhaskar Bhairavnath Idage , Susheela Bhaskar Idage , Sivaram Swaminathan
IPC分类号： C07D319/12
CPC分类号： C07D319/12
摘要： A process for the synthesis of 100% optically pure L(+)-lactide catalyzed by zinc and tin metal catalysts of less than 150 micron particle size is disclosed. The L-lactide obtained was further purified to obtain lactide of 100% optical purity and acid impurities less than 10 meq/kg.
摘要翻译：公开了一种由小于150微米粒度的锌和锡金属催化剂催化的合成100％光学纯的L（+） - 丙交酯的方法。获得的L-丙交酯进一步纯化，得到100％光学纯度和小于10meq / kg的酸性杂质的丙交酯。

10. 发明授权

US06187895B1 Method for preparing polymers by solid state polymerization 有权
标题翻译：通过固态聚合制备聚合物的方法
公开(公告)号：US06187895B1
公开(公告)日：2001-02-13
申请号：US09370435
申请日：1999-08-09
申请人： Godavarthi Satyana Varadarajan , James Day , Bhaskar Bhairavnath Idage
发明人： Godavarthi Satyana Varadarajan , James Day , Bhaskar Bhairavnath Idage
IPC分类号： C08G6400
CPC分类号： C08G64/20 , C08G63/80
摘要： Solid state polymerization of polycarbonates and polyesters is preceded by a step of contacting particles of an amorphous precursor polymer with a particulate material, typically a crystallized polycarbonate, which prevents adherence of the precursor polymer particles to each other. It is then possible to perform the solid state polymerization step without crystallizing the precursor polymer.
摘要翻译：聚碳酸酯和聚酯的固态聚合之前是将无定形前体聚合物的颗粒与颗粒材料（通常为结晶的聚碳酸酯）接触的步骤，其阻止前体聚合物颗粒相互粘附。然后可以进行固态聚合步骤而不使前体聚合物结晶。

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