Moulding materials
    3.
    发明专利

    公开(公告)号:GB995122A

    公开(公告)日:1965-06-16

    申请号:GB906464

    申请日:1964-03-04

    Applicant: BASF AG

    Abstract: A moulding material which is capable of being shaped and cured by press moulding in the temperature range 70 DEG to 250 DEG C. contains (1) at least one filler and/or reinforcing material (I); (2) at least one polymerizable ethylenically unsaturated polyester having a molecular weight of from 750 to 3000 and a softening point within the range 35 DEG to 250 DEG C. (II); (3) at least one organic peroxide having a decomposition point with the range 50 DEG to 250 DEG C. (III); (4) di - methallyl - terephthalate (IV); and optionally (5) one or more polymerizable ethylenically unsaturated monomeric compounds (V) other than di-methallyl-terephthalate; in the weight ratios of (I): (II + III + IV + V) of from 0.1 to 4, (II): (IV + V) of from 0.2 to 9, (III): (II + IV + V) of from 0.005 to 0.09, and (V): (IV) of less than 1. Lists of components I, II, III, and V are given and conventional additives may also be added to the moulding material. In the examples: (1) A polyester formed from maleic acid and propane-diol-1,2 is copolymerized with di - methallyl - terephthalate using dibenzoyl peroxide in dibutyl phthalate, there being present asbestos powder and optionally glass fibre cuttings having a length of 13 mm.; (2) a polyester formed from isophthalic and maleic acids and propane-diol-1,2 is copolymerized with dimethallyl-terephthalate and diallyl phthalate in the presence of chalk; (3) the polyester of Example (2) is copolymerized with di-methallyl-terephthalate using tertiary-butyl perbenzoate and the mixture is used to impregnate glass fibre fabric.

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