Composition And Process For Making Fine Denier Polyamide Fiber

Patent metadata

Field	Value
Publication number	US-2016115316-A1
Application number	US-201414896164-A
Country	US
Kind code	A1
Filing date	May 27, 2014
Priority date	Jun 6, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

A composition for making polyamide fiber comprises: (a) about 85 to about 99.9% by weight, preferably about 90 to about 99.5% by weight, more preferably about 95 to about 99.5%, such as about 95 to about 99% by weight of a polyamide, based on the total weight of the composition; (b) about 0.1% to about 15% by weight, preferably about 0.1% to about 10% by weight, more preferably about 0.5% to about 5%, such as about 1 to about 5% by weight of one or more thermoplastic polymers, based on the total weight of the composition, wherein the thermoplastic polymer in the composition is miscible with component (a). A process for making a polyamide fiber uses the composition of the invention.

First claim

1 . A composition for making polyamide fiber, comprising:
(a) about 85 to about 99.9% by weight, of a polyamide, based on the total weight of the composition, (b) about 0.1% to about 15% by weight, of one or more thermoplastic polymers, based on the total weight of the composition, wherein the thermoplastic polymer in the composition is miscible with component (a); and wherein the thermoplastic polymer is a copolymer of a vinyl aromatic monomer and a (meth)acrylate.

2 . The composition of claim 1 , wherein the weight average molecular weight of the thermoplastic polymer is in the range of 1,000 to 20,000.

3 . The composition of claim 1 , wherein the vinyl aromatic monomer is an non-substituted styrene or styrene substituted with one or more groups selected from the group consisting of methyl, ethyl and propyl; and the alcohol moiety in the (meth)acrylate is derived from C 1 -C 10 alkyl alcohol.

4 . The composition of claim 3 , wherein the molar ratio of the vinyl aromatic monomer to the (meth)acrylate polymerized into the copolymer is in the range of about 1:100 to about 100:1.

5 . The composition of claim 3 , wherein the copolymer comprises monomeric units from the (meth)acrylate in amount of 0 to 60 percent by weight.

6 . (canceled)

7 . The composition of claim 1 , further comprising one or more of an additive comprising: an antioxidant, an antistatic agent, and an UV-absorbing agent.

8 . The composition of claim 7 , wherein the antioxidant is selected from the group consisting of: phosphorus based antioxidants, phenolic antioxidants, sulfur based antioxidants and Antioxidant 163.

9 . The composition of claim 7 , wherein the amount of the additive in the composition is in the range of 0-10 percent by weight, based on the total weight of the composition.

10 . A process for making a polyamide fiber, comprising the step of spinning a composition comprising:
(a) about 85 to about 99.9% by weight of a polyamide, based on the total weight of the composition, (b) about 0.1% to about 15% by weight of one or more thermoplastic polymers, based on the total weight of the composition, wherein the thermoplastic polymer in the composition is miscible with component (a); and wherein the thermoplastic polymer is a copolymer of a vinyl aromatic monomer and a (meth)acrylate.

11 . The process of claim 10 , comprising steps of:
A. obtaining an additive masterbatch comprising the component (b) and the component (a), wherein in the additive masterbatch, the amount of the component (b) is less than 25%, based on the total weight of the additive masterbatch, B. melt-blending the additive masterbatch and additional component (a) to obtain the composition, and C. spinning the composition of step B.

12 . The process of claim 11 , wherein before step B, the process further comprises the step of: (A 1 ) drying the additive masterbatch of step A.

13 . A polyamide fiber made from the composition defined according to claim 1 .

14 . (canceled)

15 . The process of claim 10 comprising a high shear rate during the process, with the shear rate being at least 2000 s −1 .

16 . An article, prepared from the polyamide fiber of claim 13 .

17 . A blend, comprising the polyamide fiber of claim 13 .

Assignees

• Basf Se
• Basf Aux Y Chemicals Co Ltd

Inventors

• Yin Gary
• Wang Yanping
• Ni Jianhua

Classifications

• D01F1/10 Primary

  Other agents for modifying properties · CPC title

• D01D1/04

  Melting filament-forming substances · CPC title

• C08L77/00 Primary

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• D01D5/08

  Melt spinning methods {(D01D5/0023 takes precedence)} · CPC title

• D01D1/02

  Preparation of spinning solutions · CPC title