Title:
POLYMER COMPOSITION FOR OPTICAL MATERIAL
Document Type and Number:
Japanese Patent JP3500444
Kind Code:
B2
Abstract:
PURPOSE: To obtain a polymer composition composed of an oligomer having a specified structure, monomers selected from a specified group and an alkyl (meth)acrylate, having a low volume shrinkage factor, excellent in abrasion resistance and transparency and useful as an eyeglass lens, a prism, etc.
CONSTITUTION: This polymer composition contains (A) 20 to 80wt.% oligomer having a structure composed of terminal allyl ester groups and an inner unit derived from a polyvalent carboxylic acid and a polyvalent saturated alcohol and represented by formula I (A is an organic acid residue derived from a polyvalent carboxylic acid of formula II, formula III, etc., respectively having substituent groups at 1,2-, 1,3- or 1,4-sites; x is an integer of 1 to 10; Z is an organic residue derived from a 2 to 30C polyvalent saturated alcohol having X+1 hydroxyl groups), (B) O to 50 wt.% one or more monomers selected from diallyl 1,2-cyclohexanedicarboxylate, diallyl 4-cyclohexene-1,2-dicarboxylate, diallyl endate, etc., and (C) 5 to 40wt.% alkyl (meth)acrylate and exhibits preferably 10 to 20000 op viscosity at 30°C.
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Inventors:
Hiroshi Uchida
Yasuji Tanaka
Yasuji Tanaka
Application Number:
JP23925593A
Publication Date:
February 23, 2004
Filing Date:
September 01, 1993
Export Citation:
Assignee:
SHOWA DENKO K.K.
International Classes:
C08F220/26; C08F20/26; C08F218/16; C08F283/01; C08F290/00; C08F290/06; G02B1/04; G02C7/02; G11B7/24047; G11B7/2533; (IPC1-7): C08F290/06; C08F218/16; G02B1/04; G02C7/02
Domestic Patent References:
| JP673145A | ||||
| JP1201316A | ||||
| JP63122714A | ||||
| JP63221118A |
Attorney, Agent or Firm:
Teruo Akimoto