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    3.
    发明专利
    未知

    公开(公告)号：DE3929386A1

    公开(公告)日：1991-03-07

    申请号：DE3929386

    申请日：1989-09-05

    Applicant: BASF AG

    Inventor： EISENBARTH PHILIPP DR ,  PETER ROLAND DR ,  FOLDA THOMAS DR

    IPC: C08F222/40 ,  C08G73/12 ,  C08J5/24 ,  C08L79/08

    Abstract: Heat-curable bismaleimide resins containing an aromatic alkenyl compound, preferably o,o'-diallylbisphenol A, and a Lewis acid as an additive for prolonging the pot life at elevated temperatures are suitable for impregnating reinforcing fibers, rovings so impregnated having a prolonged gel time and being usable for fabrication of wound structures.

    6.
    发明专利
    未知

    公开(公告)号：DE3876053D1

    公开(公告)日：1992-12-24

    申请号：DE3876053

    申请日：1988-09-09

    Applicant: BASF AG

    Inventor： HESSE ANTON DR ,  HOLOCH JAN DR ,  PETER ROLAND DR

    IPC: C08G18/62 ,  C08F283/00 ,  C08G18/32 ,  C08G18/50 ,  C08G18/63 ,  C08G18/65 ,  C08G18/67 ,  C08G18/68 ,  C08L75/02

    Abstract: 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.

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