Title:
PROCESS FOR PRODUCING HARDENABLE LIQUID GRAFT COPOLYMERS CONTAINING EPOXIDE GROUPS AND PROCESS FOR PRODUCING COATED OR MOLDED SUBSTACES
Document Type and Number:
Japanese Patent JPS52108482
Kind Code:
A
Abstract:
Hardenable, liq. epoxide gp.-contg. graft copolymers, (C), are prepd. by a free radical-catalysed graft copolymerisation process in organic soln. A reaction batch is prepd. contg., by wt., (A) 30-80% liq. epoxide cpds. contg. over 1 epoxide gp. in molecule, having viscosity 15-14000 cP, measured at 25 degrees C, and epoxide equiv. wt. 120-450, dissolved in inert solvents having b. pt. 60-150 degrees C, and (B) 70-20% mixt. consisting of, by wt., (a) 2-10% 3-5C ethylenically unsatd. acid and/or unsatd. acid anhydride, (b) 70-90% acrylic acid ester of aliphatic, satd. 1-18C monohydric alcohols, (c) 5-25 % monohydroxy- 2-8C-alkyl ester of alpha, beta-ethylenically 3-5C unsatd. acid and (d) 5-30% styrene, vinyl toluene and/or alpha-methyl styrene. Components (a), (b), (c) and (d) added up to 100%. Components (A) and (B) also add up to 100%. Reaction batch is kept at 60-150 degrees C until graft copolymerisation is completed. Solvent is opt. distilled off below 130 degrees C, under reduced press. Use of (C) for preparing hardenable, solvent-free or low-solvent coating- and/or moulding compsns. is claimed. (C) can be used as casting resins in electrical industry, e.g. gor embedding switch elements. They may also be used as sealing compsns. and for prodn. of adhesives. (C) can be stored several months at 40 degrees C and are miscible with epoxide hardeners. Mixts. of (C) and epoxide hardeners can be used as solvent-free binders, which form solvent- and weather-resistant coatings at room temp. Hardened products have high impact strength, resistance to temp. changes and good plasticity at low temps. In an example, a pentaerythritol/epichlorohydrin epoxide was mixed with Bu acrylate, styrene, hydroxyethyl methacrylate and acrylic acid.
Inventors:
TEMISUTOKURISU KATSUIMUBASU
Application Number:
JP2325877A
Publication Date:
September 10, 1977
Filing Date:
March 03, 1977
Export Citation:
Assignee:
HOECHST AG
International Classes:
C08F2/00; C08F2/04; C08F2/44; C08F8/00; C08F8/14; C08F20/00; C08F20/26; C08F220/00; C08F220/04; C08F220/10; C08F283/10; C08F290/00; C08F299/00; C08G59/00; C08G59/34; C09D151/00; C09D151/08; (IPC1-7): C08F2/06; C08F2/44; C08F8/14; C08F212/06; C08F220/04; C08F220/12; C08F220/28; C08F299/02; C08G59/20; C09D3/58