Patent EP0180960A2 successfully refreshed from Google Patents.
EP0180960A2
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Melt spinning process
Assignee: Japan Exlan Co Ltd
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Filing: 1985-11-05
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Granted: —
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Expires: 2005-11-05
Abstract
Abstract A process for melt spinning an aromatic polyester showing anisotropy in the molten state in the presence of at least one stabilizer selected from phosphorus compounds and phenol compounds, by which occurrence of foaming due to the reactions such as decomposition, polymerization and cross-linking during the spinning can be prevented.
Inventors
- 👤 Hiroaki Sugimoto
- 👤 Kazuo Hayatsu
- 👤 Toshiyuki Kobashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:21
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/527; D01F1/00; D01F1/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
407 words
A process for producing aromatic polyester fibers which comprises mixing 100 parts by weight of an aromatic polyester showing optical anisotropy in the molten state with 0.03 to 0.5 part by weight of at least one compound selected from the group consisting of phosphorus compounds of the formulae: and wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 7 , R 8 , R 9 and R 11 are independently a monovalent aliphatic hydrocarbon group having 6 or more carbon atoms, a monovalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a monovalent aromatic hydrocarbon group having 6 or more carbon atoms; R 6 is a divalent aliphatic hydrocarbon group having 1 or more carbon atoms, a divalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a divalent aromatic hydrocarbon group having 6 or more carbon atoms; and R 10 is a tetravalent aliphatic hydrocarbon group having 5 or more carbon atoms, a tetravalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a tetravalent aromatic hydrocarbon group having 6 or more carbon atoms, and phenolic compounds of the formulae; and wherein n in an integer of 1 to 4; p is zero or an integer of 1; R 12 and R 13 are independently hydrogen, a hydroxyl group, a monovalent hydrocarbon group having 1 or more carbon atoms, an alkoxy group having 1 or more carbon atoms, a monovalent alicyclic hydrocarbon group having 6 or more carbon atoms, a monovalent aromatic hydrocarbon group having 6 or more carbon atoms, a cycloalkoxy group gaving 6 or more carbon atoms, or an aryloxy group having 6 or more carbon atoms; R 14 is an aliphatic hydrocarbon group having a valence of n and 1 or more carbon atoms, an alicyclic hydrocarbon group having a valence of n and 6 or more carbon atoms, an aromatic hydrocarbon group having a valence of n and 6 or more carbon atoms, -0-, -CO-, -S-, or -NR 12 -(provided that when R 14 is -0-, -CO-, -S- or -NR 12 -, n is 2); R 15 is a divalent aliphatic hydrocarbon group, having 1 or more carbon atoms, a divalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a divalent aromatic hydrocarbon group having 6 or more carbon atoms; and X is -O-, -CO-, -S-, -NR 12 -, -CO-O-, or -O-CO-, and melt spinning the resulting mixture.
Claim 2
Dependent Claim
407 words
A process for producing aromatic polyester fibers which comprises mixing 100 parts by weight of an aromatic polyester showing optical anisotropy in the molten state with 0.03 to 0.5 part by weight of at least one compound selected from the group consisting of phosphorus compounds of the formulae: and wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 7 , R 8 , R 9 and R 11 are independently a monovalent aliphatic hydrocarbon group having 6 or more carbon atoms, a monovalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a monovalent aromatic hydrocarbon group having 6 or more carbon atoms; R 6 is a divalent aliphatic hydrocarbon group having 1 or more carbon atoms, a divalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a divalent aromatic hydrocarbon group having 6 or more carbon atoms; and R 10 is a tetravalent aliphatic hydrocarbon group having 5 or more carbon atoms, a tetravalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a tetravalent aromatic hydrocarbon group having 6 or more carbon atoms, and phenolic compounds of the formulae; and wherein n in an integer of 1 to 4; p is zero or an integer of 1; R 12 and R 13 are independently hydrogen, a hydroxyl group, a monovalent hydrocarbon group having 1 or more carbon atoms, an alkoxy group having 1 or more carbon atoms, a monovalent alicyclic hydrocarbon group having 6 or more carbon atoms, a monovalent aromatic hydrocarbon group having 6 or more carbon atoms, a cycloalkoxy group gaving 6 or more carbon atoms, or an aryloxy group having 6 or more carbon atoms; R 14 is an aliphatic hydrocarbon group having a valence of n and 1 or more carbon atoms, an alicyclic hydrocarbon group having a valence of n and 6 or more carbon atoms, an aromatic hydrocarbon group having a valence of n and 6 or more carbon atoms, -0-, -CO-, -S-, or -NR 12 -(provided that when R 14 is -0-, -CO-, -S- or -NR 12 -, n is 2); R 15 is a divalent aliphatic hydrocarbon group, having 1 or more carbon atoms, a divalent alicyclic hydrocarbon group having 6 or more carbon atoms, or a divalent aromatic hydrocarbon group having 6 or more carbon atoms; and X is -O-, -CO-, -S-, -NR 12 -, -CO-O-, or -O-CO-, and melt spinning the resulting mixture.
Claim 3
Dependent Claim
16 words
A process according to Claim 1, wherein the melt spinning is conducted at 280° to 420°C.
Claim 4
Dependent Claim
87 words
A process according to Claim 1, wherein the aromatic polyester is a copolyester comprising 40 to 70 mole % of p-hydroxybenzoic acid residue, 15 to 30 mole % of an aromatic dicarboxylic acid residue and 15 to 30 mole % of an aromatic diol residue, a copolyester prepared by reacting terephthalic acid and/or isophthalic acid with at least one of chlorohydroquinone, phenylhydroquinone and hydroquinone, or a copolyester comprising 20 to 80 mole % of p-hydroxybenzoic acid residue and 20 to 80 mole % of 2-hydroxynaphthalene-6-carboxylic acid residue.
Claim 5
Dependent Claim
13 words
A process according to Claim 1, wherein the phosphorus compound is cyclic neopentanetetrayl-bis-(octadecylphosphite).
Claim 6
Dependent Claim
12 words
A process according to Claim 1, wherein the phosphorus compound is 4,4'-diphenylene-bis[2,4-di-tert-butylphenyl)phosphite].
Claim 7
Dependent Claim
12 words
A process according to Claim 1, whrein the phosphorus compound is tris(p-nonylphenyl)phosphite.
Claim 8
Dependent Claim
12 words
A process according to Claim 1, wherein the phenolic compound is p-phenylphenol.
Claim 9
Dependent Claim
12 words
A process according to Claim 1, wherein the phenolic compound is 2-acryloxy-3,3'-di-tert-butyl-2'-hydroxy-5,5'-dimethyldiphenylmethane.
Claim 10
Dependent Claim
12 words
A process according to Claim 1, wherein the phenolic compound is 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.
References Cited (Backward Citations)
No citation records indexed.
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