Method for preparing a latently reactive, pastly molding compoun

Details Method for preparing a latently reactive, pastly molding compoun Method for preparing a latently reactive, pastly molding compoun

1991-02-01

1992-08-18

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 67, 524733, 524729, 524839, 428290, 428 48, 150157, C08G 1810

Patent

active

051400898

ABSTRACT:
A pasty molding compound, which is reactive only above room temperature and is intended for manufacturing temperature-resistant, elasticized duromer molded components, consists of a dimerized trimethylol propane (melting point 109.degree. C., molecular weight 250, OH number 900) and of 1 to 625 parts by weight (per 100 parts of methylene diphenyldiisocyanate) of low-molecular weight and an isocyanate-limited polyesterpolyol-diisocyanate-prepolymer, prepared from polycaprolactone and an isomeric mixture of the toluenediisocyanate. This masterbatch, which has an NCO excess of up to 15% over the equivalent quantity of the free OH components can be fortified with fillers and is moldable at low pressures. Furthermore, its application as an impregnating agent for glass-fiber mats to be molded is provided.

REFERENCES:
patent: 4390678 (1983-06-01), LaBelle et al.

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