Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-11-21
1993-01-26
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
523139, 523141, 523145, 525504, 525506, 528129, C08G 828, C08F28300, B22C 100, B22C 122
Patent
active
051823462
ABSTRACT:
There are disclosed methods and compositions for accelerating the hardening of phenolic resole resins having a pH of about 4.5 to 9.5 with lightburned magnesium oxide or magnesium hydroxide, with or without the addition of an ester functional hardening agent. Acceleration of hardening is achieved by incorporating into said compositions an effective quantity of a material which: increases the solubility of magnesium in the hardenable mixture; by certain amines; or by certain chelating agents. Accelerator compounds include those which provide chloride, sulfamate, nitrate, formate, and phosphite anions as well as selected tertiary amines.
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Soviet Union Abst. 1316994z 870615 which is assigned to Maghezit Corp.
Borden Inc.
Jones Richard
Kight III John
Maskas George P.
Rainear Dennis H.
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