EINGEDICKTE FORMMASSEN.

摘要

Thickened, uncured moulding compsn., which is stable at 23 deg.C and cures at temps. above 50 deg.C, contains a liq. reactive system (I), which can be polymerised by free radicals, 1-80 (wt.)%, w.r.t. (I), of a thickener (II) contg. NCO gps., 0.01-5%, w.r.t. (I), of a polymerisation initiator (III), which decomposes above 50 deg.C, and opt. conventional additives. The novelty is that (II) consists of a combination of 0.001-0.5 amine equiv. of an aminobenzoic acid deriv. (IIA), w.r.t. 1000 g (I)+(IIA), and 0.001-1.5 NCO equiv. of an isocyanate (IIB) w.r.t. one equiv. of all NCO-reactive gps. in the moulding compsn. (IIA) is pref. of the formula (H2N-Ar-CO-)nX where Ar = a (substd.) divalent aromatic gp.; n = 1 or 2; X = -O-R1, -NH-R1, -N(R1)2, -O-R-O-, -NH-R-NH-, -NH-R-O-, -NH-R-NR1-, -NR1-R-NR1- or -NR1-R-O-; pref. -O-R-O-or -NH-R-NH-; R = an alkylene, arylene, polyether, polyester, polyamido or polycarbamate gp.; pref. a polyether gp. with a deg. of polymerisation of 1-300 or a 2-20C alkylene gp.; R1 = alkyl or aryl. (I) is a monomer (IA); or a mixt. of min. 5% (IA) and max. 95% satd. or unsatd. oligomer or polymer (IB) dissolved or dispersed in (IA). (IB) pref. is an unsatd. polyester, vinyl ester, vinyl ether urethane, allylated prepolymer, bismaleimide resin or hydrocarbon resin; or a satd. polyester, polyester polyol, polyether polyol, epoxide resin, thermoplastics or elastomer. Suitable additives are 10-400% fibrous reinforcements or 25-300% filler powder or granules w.r.t. (I). When filled with 150 pts. CaCO3 w.r.t. 100 pts. (I)+(II), the compsn. has a viscosity of min. 500000 mPa.s at 23 deg.C. Without fillers and reinforcing fibres, it is soluble in suitable organic solvents, e.g. DMF, and esp. is still practically completely in these solvents, e.g. DMF, after keeping at 23 deg.C for at least 1 day.