Toray Fine Chemicals Co., Ltd.

Yukiko Hamada

Kazunori Matsumoto

Koki Echigoya

Yasukazu Suga

Rika Umano

Tomohiro Oba

A thiol group-containing polymer represented by:HS&#x2014;(R&#x2014;S)&#x2014;R&#x2014;SHwherein R is an organic group including a &#x2014;O&#x2014;CH&#x2014;O&#x2014; bond and a branched alkylene group, n is an integer of from 1 to 200, r is an integer of from 1 to 5, an average value of r is 1.1 or more and lower than 1.8, and the thiol group-containing polymer is a liquid at room temperature and has a specific gravity at 23&#xb0; C. of 1.20 to 1.27.

Thiol group-containing polymer and curable composition thereof

A method of producing a thiol group-containing polymer includes reacting bis(2-chloroethyl) formal with sodium hydrosulfide, wherein the thiol group-containing polymer is represented by general formula:HS&#x2014;(R&#x2014;S)&#x2014;R&#x2014;SHwhere R is an organic group including a &#x2014;CH&#x2014;O&#x2014;CH&#x2014;O&#x2014;CH&#x2014; structure, n is an integer of from 1 to 200, r is an integer of from 1 to 5, and the average value of r is 1.1 or more and lower than 1.8, and wherein the thiol group-containing polymer is a liquid polymer.

Thiol group-containing polymer, curable composition thereof and method of producing same

A thiol group-containing polymer is represented by HS&#x2014;(R&#x2014;S)&#x2014;R&#x2014;SH, wherein R is an organic group including a &#x2014;O&#x2014;CH&#x2014;O&#x2014; bond and/or a branched alkylene group, n is an integer of from 1 to 200, r is an integer of from 1 to 5, and the average value of r is 1.1 or more and 1.8 or less. A curable composition using the thiol group-containing polymer can be used in sealants, adhesives, paints and the like, which require properties such as a low specific gravity, a low viscosity and a low glass transition temperature.

The curable composition is a curable composition including a liquid polysulfide polymer containing 8% by weight or more of thiol groups in one molecule, an epoxy resin, and an amine, in which the liquid polysulfide polymer isHS&#x2014;(R&#x2014;S)&#x2014;R&#x2014;SHwherein R is a two valent or three valent organic group containing a &#x2014;O&#x2014;CH&#x2014;O&#x2014; bond, the average of n is less than 10, x is an integer of 1 to 5, and the average of x is 1 to 2.5.

Curable composition

A halogen-terminated sulfur-containing polymer is represented by:X&#x2014;(R&#x2014;S)&#x2014;R&#x2014;Xwherein R is an ether bond-containing alkyl group having 3 to 26 carbon atoms, X is a halogen atom, n is an integer of 1 to 200, and r has an average of 1 to 5.

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Ichihara, Japan

Yukiko Hamada