Invention Grant
- Patent Title: Polymerizable compositions containing ethylenically unsaturated monomers having episulfide functional groups and related methods
- Patent Title (中): 含有具有环硫官能团的烯属不饱和单体和相关方法的可聚合组合物
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Application No.: US13864785Application Date: 2013-04-17
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Publication No.: US09051426B2Publication Date: 2015-06-09
- Inventor: Charles R. Hickenboth , Federico Menta , Nina V. Bojkova
- Applicant: PPG INDUSTRIES OHIO, INC.
- Applicant Address: US OH Cleveland
- Assignee: PPG Industries Ohio, Inc.
- Current Assignee: PPG Industries Ohio, Inc.
- Current Assignee Address: US OH Cleveland
- Agency: The Webb Law Firm
- Main IPC: C08F128/06
- IPC: C08F128/06 ; C08F134/04 ; C08F228/06 ; C08F234/04 ; C08F28/06 ; C08F34/04 ; C08F220/38 ; C08F222/10 ; G02B1/04 ; C08G63/68 ; C08G75/00
Abstract:
Provided is a polymerizable composition of (a) a monomer composition including ethylenically unsaturated monomer having a β-epithiopropyl functional group; (b) optionally, a compound having two or more β-epithiopropyl functional groups but no polymerizable ethylenically unsaturated groups; (c) an isourea functional polymerization initiator; and (d) a catalyst for reaction between the β-epithiopropyl functional groups. Also provided is a method of reducing the yellowness index of a sulfur-containing polymerizate prepared by addition polymerization, the method including reacting in the presence of an isourea functional polymerization initiator and a catalyst for reaction between β-epithiopropyl functional groups, a polymerizable composition of: (a) a monomer composition including ethylenically unsaturated monomer having a β-epithiopropyl functional group; and, optionally, (b) a compound having two or more β-epithiopropyl functional groups but no polymerizable ethylenically unsaturated groups.
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