公开(公告)号：US4024204A

公开(公告)日：1977-05-17

申请号：US591416

申请日：1975-06-30

申请人： Karl Schlichting ,  Ludwig Beer ,  Wolfgang Seydl

发明人： Karl Schlichting ,  Ludwig Beer ,  Wolfgang Seydl

IPC分类号： C08L67/02 ,  C08L77/00

CPC分类号： C08L67/02

摘要： Polybutylene terephthalate molding compositions containing from 0.5 to 20% by weight, based on the polyester, of an alkoxylated polyamide finely distributed therein to reduce the tendency of the polyester to electrification.

摘要翻译： 聚对苯二甲酸丁二醇酯模塑组合物含有基于聚酯的0.5至20重量％的精细分散在其中的烷氧基化聚酰胺以降低聚酯电气化倾向。

公开(公告)号：US06423817B1

公开(公告)日：2002-07-23

申请号：US08722048

申请日：1996-12-31

申请人： Klaus Weinerth ,  Karlheinz Mell ,  Paul Matthies ,  Ludwig Beer

发明人： Klaus Weinerth ,  Karlheinz Mell ,  Paul Matthies ,  Ludwig Beer

IPC分类号： C08G6908

CPC分类号： C08G69/48 ,  C08K5/3435 ,  Y10T428/29 ,  Y10T428/2913 ,  Y10T428/2967 ,  Y10T428/2969 ,  Y10T442/183 ,  Y10T442/30 ,  C08L77/00

摘要： A process for preparing inherently light- and heat-stabilized polyamides comprises polymerizing in the presence of at least one triacetonediamine compound of the formula where R is hydrogen or hydrocarbyl having from 1 to 20 carbon atoms, preferably alkyl having from 1 to 18 carbon atoms, or benzyl.

摘要翻译： 制备本发明的光稳定和热稳定的聚酰胺的方法包括在至少一种由式R所示的三丙酮二胺化合物或具有1至20个碳原子的烃基，优选具有1至18个碳原子的烷基的存在下聚合，或 苄基。

公开(公告)号：US4154970A

公开(公告)日：1979-05-15

申请号：US913643

申请日：1978-06-08

申请人： Ludwig Beer ,  Heinrich Mandel

发明人： Ludwig Beer ,  Heinrich Mandel

IPC分类号： C07C27/00 ,  C07C29/74 ,  C07C29/88 ,  C07C31/20 ,  C07C67/00 ,  C08G63/00 ,  C08G63/91 ,  C07C29/24

CPC分类号： C07C29/88 ,  C07C29/74

摘要： A process for treating butanediol obtained as a condensate during the manufacture of polybutylene terephthalate, wherein an alkali metal alcoholate or alkali metal hydride is added to the condensate at an elevated temperature. After purification, the butanediol obtained is re-used for the manufacture of polybutylene terephthalate.

摘要翻译： 在制备聚对苯二甲酸丁二醇酯期间作为冷凝物处理丁二醇的方法，其中在升高的温度下向冷凝物中加入碱金属醇盐或碱金属氢化物。 纯化后，所得的丁二醇被再次用于制造聚对苯二甲酸丁二醇酯。

公开(公告)号：US4056514A

公开(公告)日：1977-11-01

申请号：US668284

申请日：1976-03-18

申请人： Hugo Strehler ,  Ludwig Beer ,  Eduard Heil ,  Friedrich Urbanek ,  Hermann Fischer

发明人： Hugo Strehler ,  Ludwig Beer ,  Eduard Heil ,  Friedrich Urbanek ,  Hermann Fischer

IPC分类号： C08G63/00 ,  C08G63/78 ,  C08G63/85 ,  C08G63/16

CPC分类号： C08G63/78 ,  C08G63/85

摘要： A process for the continuous manufacture of linear, high molecular weight, polybutylene terephthalates, in which dimethyl terephthalate is trans-esterified with 1,4-butanediol, if desired in the presence of up to 40 mole% of other starting materials which form linear polyesters, in the molar ratio of from 1:1.2 to 1:1.5, in a plurality of successive stages at temperatures rising from 160.degree. to 230.degree. C, the mixture thus obtained is passed, at from 230.degree. to 270.degree. C and from 2 mm Hg to 20 mm Hg, upward through a bundle of stationary heated tubes, and immediately thereafter through a hold tank, with the proviso that the volume of the hold tank is at least 1/4 and at most 2.5 times the volume of the tube bundle and the mean residence time in the tube bundle and hold tank together is from 10 to 60 minutes, and the precondensate thus obtained is polycondensed at from 240.degree. to 260.degree. C and from 0.1 to 2 mm Hg. with continuous formation of thin films.The polybutylene terephthalates manufactured by the above process may be used for the manufacture of products such as fibers, films, sheeting and injection moldings.