公开(公告)号：US3781400A

公开(公告)日：1973-12-25

申请号：US78140071

申请日：1971-09-28

Applicant: RHODIACETA

Inventor： COUCHOUD PAUL ,  ROCHINA VINCENT

IPC: C08L83/04 ,  D01D5/12

CPC classification number: C08L83/04 ,  C08G77/06 ,  C08G77/16 ,  C08G77/20

Abstract: THE INVENTION COMPRISES FILAMENTS AND BRISTLES HAVING A BASIS OF A DIORGANOPOLYSILOXANE WHICH COMBINE A KILOMETRIC BREAKING STRENGTH ABOVE 1.25 WITH AN ELONGATION AT BREAK OF AT LEAST 300%. THEY ARE MADE FROM DIORGANOPOLYSILOXANES IN WHICH AT LEAST 60% OF THE ORGANIC SUBSTITUENT GROUPS ARE METHYL AND A SMALL PROPORTION (0.32%) ARE VINYL, BY EXTRUSION FOLLOWED BY STRETCHING, A HEAT TREATMENT TO "VULCANIZE" THE PRODUCTS, A FURTHER STRETCH AND PREFERABLY A FURTHER HEAT TREATMENT. THE PRODUCTS MAY ALSO BE GIVEN A THIRD HEAT TREATMENT WHILE WOUND UP ON A SUPPORT. THE COMPOSITION WHICH IS EXTRUDED CONTAINS, BESIDES THE DIORGANOPOLYSILOXANE, A FILLER, A CROSSLINKING CATALYST, PREFERABLY OF THE FREE RADICAL TYPE, AND OPTIONALLY A PLASTICIZER, ESPECIALLY AN ORGANISICON COMPOUND.

公开(公告)号：US3717696A

公开(公告)日：1973-02-20

申请号：US71769671

申请日：1971-02-09

Applicant: RHODIACETA

Inventor： ROCHINA VINCENT ,  ALLARD PIERRE

IPC: D01F6/74 ,  A61H33/10 ,  D01F20060101 ,  D01F6/60 ,  D01F6/76 ,  D01F6/80 ,  D01D5/04 ,  D01F7/04 ,  D02J13/00

CPC classification number: A61H33/10 ,  D01F6/74

Abstract: This invention provides a process for producing polyamide-imide filaments which are heat-stable and have high tensile strength by solvent spinning under specified conditions. In a preferred embodiment the polyamide-imide polymers in solution are extruded into filaments and fibers through a spinneret maintained at a temperature between 60* C. and 180* C. heated at a temperature higher than 160* C. up to about 240* C. at a constant length for 2 to 6 hours, and subsequently drawn at a drawing ratio of at least 3:1 at a temperature generally in the range of about 220* C. up to about 420* C.

Abstract translation: 本发明提供一种通过特定条件下的溶剂纺丝制备热稳定性和拉伸强度高的聚酰胺 - 酰亚胺长丝的方法。 在优选的实施方案中，将溶液中的聚酰胺 - 酰亚胺聚合物通过保持在60℃至180℃之间的温度的喷丝头挤出成长丝和纤维，在高于160℃至约240℃的温度下加热 在恒定长度下进行2至6小时，然后在通常在约220℃至约420℃的温度下以至少3:1的拉伸比拉伸。