# US 2014/0194592 A1 · Polyarylene sulfide resin with excellent luminosity and preparation method thereof

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- Number: US 2014/0194592 A1
- Document ID: US20140194592A1
- Status: Published application
- Kind: A1
- Application number: 14/179,909
- Filed: 2014-02-13
- Published: 2014-07-10
- Earliest claimed: 2007-01-04
- Assignees: SK Chemicals Co., Ltd.
- Applicants: SK Chemicals Co., Ltd.
- Inventors: Young-Rok Lee; Il-Hoon Cha; Yong-Jun Shin; Jun-Sang Cho
- Web page: https://patentgrep.com/patent/US20140194592A1

## CPC

- C08G 75/14: Polysulfides
- C08G 75/0209: derived from monomers containing one aromatic ring
- C08G 75/0231: containing chain-terminating or chain-branching agents
- C08G 75/0263: using elemental sulfur
- C08L 81/02: Polythioethers; Polythioether-ethers
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285° C., and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity.

## Claims

### Claim 1

A process of a polyarylene sulfide comprising the steps of:
a) melting and mixing a composition comprising 100 part by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur; and
b) polymerizing the molten mixture of step a) for 1 to 30 hours while increasing the temperature and decreasing the pressure from initial reaction conditions of a temperature 180 to 250° C. and a pressure 50 to 450 Torr to final reaction conditions of a temperature 270 to 350° C. and a pressure 0.001 to 20 Torr,
wherein the sulfur-containing polymerization terminator is at least one selected from the group consisting of 2,2′-dithiobisbenzothiazole, benzothiazolesulfenamide, and dithiocarbamate.

### Claim 2 (depends on 1)

The process of a polyarylene sulfide according claim 1,
wherein the benzothiazolesulfenamide is at least one selected from the group consisting of N-cyclohexylbenzothiazole-2-sulfenamide, 2-morpholinothiobenzothiazole, and N-N-dicyclohexylbenzothiazole-2-sulfenamide, and
the dithiocarbamate, is at least one selected from the group consisting of zinc dimethyldithiocarbamate and zinc diethyldithiocarbamate.

### Claim 3 (depends on 1)

The process of a polyarylene sulfide according claim 1,
wherein the composition further comprises at least a polymerization catalyst selected from the group consisting of 1,3-diiodo-4-nitrobenzene (mDINB), 1-iodo-4-nitrobenzene, 2,6-diiodo-4-nitrophenol, and 2,6-diiodo-4-nitrobenzene in a amount of 0.01 to 20 parts by weight based on 100 parts by weight of the solid sulfur.