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    • 10. 发明授权
    • Impact-resistant thermoplastic polyorganosiloxane-based graft copolymer
and process for producing same
    • 耐冲击热塑性聚有机硅氧烷基接枝共聚物及其制备方法
    • US4690986A
    • 1987-09-01
    • US904463
    • 1986-09-08
    • Isao SasakiAkira YanagaseYasunori KawachiTetsuya MayuzumiToshio ObaFumio Okada
    • Isao SasakiAkira YanagaseYasunori KawachiTetsuya MayuzumiToshio ObaFumio Okada
    • C08F30/00C08F30/08C08F283/00C08F283/12C08F290/00C08F299/08C09D151/08
    • C08F283/124C09D151/085
    • A polyorganosiloxane-based high-impact thermoplastic graft copolymer superior in impact resistance, light resistance, surface gloss and color fastness produced by the emulsion graft polymerization of at least one vinyl monomer on an emulsion-polymerized polyorganosiloxane which consists of90 to 99.8 mole % of an organosiloxane unit represented by the formulaR'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl,0.1 to 10 mole % of a unit derived from a graft-linking agent, said unit being represented by the formula ##STR1## wherein; R.sup.2 denotes methyl, ethyl, propyl, or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and0.1 to 10 mole % of a unit derived from a tetrafunctional silane crosslinking agent, said unit being represented by the formulaSiO.sub.4/2 (III),said polyorganosiloxane showing a degree of swelling of 5 to 15 in toluene, andsaid graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight; and a process for producing the said graft copolymer.
    • 通过在乳液聚合的聚有机硅氧烷上由至少一种乙烯基单体的乳液接枝聚合产生的抗冲击性,耐光性,表面光泽和色牢度优异的基于聚有机硅氧烷的高冲击热塑性接枝共聚物,其由90-99.8摩尔% 由式R'2SiO2 / 2(I)表示的有机硅氧烷单元,其中R'相同或不同,表示甲基,乙基,丙基或苯基,0.1-10摩尔%衍生自接枝交联剂的单元, 所述单元由式(II)表示,其中: R2表示甲基,乙基,丙基或苯基; n表示0,1和2的数; p表示1〜6的数,0.1〜10摩尔%的来自四官能性硅烷交联剂的单元,所述单元由式SiO 4/2(III)表示,所述聚有机硅氧烷的膨胀度为5 至15,并且所述含有所述聚有机硅氧烷的接枝共聚物的量为10-70重量%; 以及所述接枝共聚物的制造方法。