公开(公告)号：US5525706A

公开(公告)日：1996-06-11

申请号：US328550

申请日：1994-10-25

Applicant: Patrick R. Gruber ,  Jeffrey J. Kolstad ,  Christopher M. Ryan ,  Eric S. Hall ,  Robin S. Eichen Conn

Inventor： Patrick R. Gruber ,  Jeffrey J. Kolstad ,  Christopher M. Ryan ,  Eric S. Hall ,  Robin S. Eichen Conn

IPC: A61L15/26 ,  A61L31/06 ,  C08G63/08 ,  C08G63/90 ,  C08J5/18 ,  C08K5/1575 ,  C08L67/00 ,  C08L67/04 ,  C09D167/04 ,  D01F6/62 ,  D01F6/84 ,  D01F6/92 ,  D03D15/00 ,  D04H1/42 ,  D21H19/28 ,  D21H19/62

CPC classification number: C08J5/18 ,  A61L15/26 ,  A61L31/06 ,  C08G63/08 ,  C08G63/90 ,  C08L67/04 ,  C09D167/04 ,  D01F6/625 ,  D04H1/435 ,  D04H1/4382 ,  D21H19/28 ,  D21H19/62 ,  C08G2230/00 ,  C08J2367/04 ,  Y10T428/31786 ,  Y10T428/31808 ,  Y10T442/60 ,  Y10T442/622 ,  Y10T442/637 ,  Y10T442/642 ,  Y10T442/68

Abstract: A nonwoven fabric comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing a nonwoven fabric with the lactide polymer composition is also disclosed.

公开(公告)号：US5359026A

公开(公告)日：1994-10-25

申请号：US100550

申请日：1993-07-30

Applicant: Patrick R. Gruber

Inventor： Patrick R. Gruber

IPC: A61F13/15 ,  A61F13/49 ,  A61F13/551 ,  B29C45/00 ,  B29C49/00 ,  B29C51/00 ,  B29K67/00 ,  C08F290/00 ,  C08F299/04 ,  C08G18/42 ,  C08G59/40 ,  C08G63/08 ,  C08G63/78 ,  C08G63/91 ,  C08J3/24 ,  C08J5/18 ,  C08L67/04 ,  D04H1/42 ,  D21H19/24

CPC classification number: C08G63/08 ,  Y10T428/31786 ,  Y10T428/3179 ,  Y10T442/60

Abstract: A copolymerized poly(lactide) polymer. A lactide is copolymerized with an epoxidized fat, oil, or mixture thereof thereby resulting in poly(lactide) copolymers having improved processing properties over prior poly(lactide)s.

Abstract translation: 共聚聚（丙交酯）聚合物。 丙交酯与环氧化的脂肪，油或其混合物共聚，由此得到具有优于现有聚（丙交酯）的加工性能的聚（丙交酯）共聚物。

公开(公告)号：US5357035A

公开(公告)日：1994-10-18

申请号：US122145

申请日：1993-09-16

Applicant: Patrick R. Gruber ,  Eric S. Hall ,  Jeffrey J. Kolstad ,  Matthew L. Iwen ,  Richard D. Benson ,  Ronald L. Borchardt

Inventor： Patrick R. Gruber ,  Eric S. Hall ,  Jeffrey J. Kolstad ,  Matthew L. Iwen ,  Richard D. Benson ,  Ronald L. Borchardt

IPC: C08G63/06 ,  C08G63/08 ,  C07D319/12

CPC classification number: C08G63/08 ,  C08G63/06

Abstract: A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.

Abstract translation: 一种从乳酸连续生产聚丙交酯聚合物的方法，其中除去水或溶剂载体，以将乳酸进料浓缩，然后聚合成低分子量预聚物。 将该预聚物加入反应器中，在该反应器中加入催化剂以促进产生丙交酯，即聚乳酸的解聚产物。 生成的丙交酯以其中除去水和其它杂质的液体或蒸气连续供入蒸馏系统。 将所得纯化液体丙交酯直接进料至聚合过程。

公开(公告)号：US5274073A

公开(公告)日：1993-12-28

申请号：US935059

申请日：1992-08-24

Applicant: Patrick R. Gruber ,  Eric S. Hall ,  Jeffrey J. Kolstad ,  Matthew L. Iwen ,  Richard D. Benson ,  Ronald L. Borchardt

Inventor： Patrick R. Gruber ,  Eric S. Hall ,  Jeffrey J. Kolstad ,  Matthew L. Iwen ,  Richard D. Benson ,  Ronald L. Borchardt

IPC: C08G63/06 ,  C08G63/08 ,  C07D319/12

CPC classification number: C08G63/08 ,  C08G63/06

Abstract: A process for the continuous conversion of crude lactic acid to a substantially purified lactide or polylactide including the steps of polymerizing the lactic acid to form a prepolymer with subsequent depolymerization to form a crude lactide in the presence of a catalyst. The crude lactide is purified in an improved distillation system in which at least three fractions are formed with the substantially purified lactide removed as an intermediate boiling sidedraw stream. The substantially purified lactide may then be polymerized.

Abstract translation: 一种将粗乳酸连续转化成基本上纯化的丙交酯或聚丙交酯的方法，包括聚合乳酸以形成预聚物的步骤，随后在催化剂存在下解聚形成粗丙交酯。 粗丙交酯在改进的蒸馏系统中纯化，其中至少三个级分形成，基本上纯化的丙交酯作为中间沸腾的侧面流除去。 然后将基本上纯化的丙交酯聚合。