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    • 6. 发明授权
    • Low shrinkable unsaturated polyester resin composition
    • 低收缩不饱和聚酯树脂组合物
    • US4593067A
    • 1986-06-03
    • US686145
    • 1984-12-26
    • Masaharu NakayamaKyosuke FukushiYasuo MoriyaNobuyoshi Suzuki
    • Masaharu NakayamaKyosuke FukushiYasuo MoriyaNobuyoshi Suzuki
    • C08L53/00C08F283/01C08F287/00C08F293/00C08F295/00C08F299/04C08L23/00C08L51/00C08L51/02C08L67/00C08L67/06C08L77/00C08L101/00
    • C08F299/04C08F287/00C08L67/06
    • Disclosed herein is a low shrinkable unsaturated polyester resin composition consisting of (A) 20-70% by weight of an unsaturated polyester, (B) 28-60% by weight of a monomer polymerizable with the above unsaturated polyester, and (C) 2-20% by weight of a block copolymer mixture. The mixtures of the monomer (B) and the block copolymer mixture (C), and a mixture of the polyester (A), the monomer (B), and the block copolymer mixture (C) are in a non-aqueous dispersion state. The block copolymer mixture is obtained by polymerizing either one of the monomers defined below in (a) and (b) with a polymerization initiator a polymeric perioxide represented by the formula: ##STR1## in which R.sub.1 represents a divalent branched hydrocarbon group having 10-30 carbons, and R.sub.2 and R.sub.3 represent a hydrogen atom, a hydroxyl group or an alkali metal, and the average polymerization degree n is 2-40, and is used to obtain a first polymer having peroxy bonds in its molecule, and block-polymerizing the first polymer with the remaining monomer (a) or (b) which has not been used in the first polymerization reaction wherein, (a) is a monomer or a monomer mixture consisting of 70-100% by weight of styrene monomer and 30-0% by weight of a monomer polymerizable therewith.(b) is a monomer or a mixture of monomers consisting of 70-100% by weight of C.sub.1-4 alkyl ester of acrylic acid or methacrylic acid and 0-30% by weight of a monomer polymerizable therewith.
    • 本发明公开了一种低收缩不饱和聚酯树脂组合物,其包含(A)20-70重量%的不饱和聚酯,(B)28-60重量%的可与上述不饱和聚酯聚合的单体和(C)2 -20重量%的嵌段共聚物混合物。 单体(B)和嵌段共聚物混合物(C)的混合物以及聚酯(A),单体(B)和嵌段共聚物混合物(C)的混合物处于非水分散状态。 嵌段共聚物混合物是通过将下列(a)和(b)中定义的单体之一与聚合引发剂一起聚合而得到的,所述聚合引发剂是下式表示的聚合二氧化物:其中R 1表示二价支链烃基 具有10-30个碳,R2和R3表示氢原子,羟基或碱金属,平均聚合度n为2-40,用于获得分子中具有过氧键的第一聚合物,以及 将第一聚合物与在第一聚合反应中未使用的剩余单体(a)或(b)嵌段聚合,其中(a)是由70-100重量%的苯乙烯单体组成的单体或单体混合物 和30-0重量%的可与其聚合的单体。 (b)是由70-100重量%的丙烯酸或甲基丙烯酸的C 1-4烷基酯和0-30重量%的与其可聚合的单体组成的单体或单体混合物。