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    • 3. 发明授权
    • Process for producing a low gloss thermoplastic resin
    • 低光泽热塑性树脂的制造方法
    • US4877844A
    • 1989-10-31
    • US135470
    • 1987-12-21
    • Kazuo KishidaYutaka ToyookaYoshiyuki Mikami
    • Kazuo KishidaYutaka ToyookaYoshiyuki Mikami
    • C08F236/12C08F279/02
    • C08F236/12C08F279/02
    • A process for producing a low gloss thermoplastic resin which comprises polymerizing in two steps from 20 to 70 parts by weight of a butadiene polymer, at least 70% by weight of which is constituted by butadiene, with from 30 to 80 parts by weight of a total of from 15 to 40% by weight of a vinyl cyanide monomer and from 60 to 85% by weight of an aromatic vinyl monomer, characterized in that for the polymerization of the first step, the butadiene polymer, the vinyl cyanide monomer and the aromatic vinyl monomer were charged in amounts corresponding to from 20 to 80% by weight of the entire butadiene polymer, from 20 to 80% by weight of the entire vinyl cyanide monomer and from 20 to 80% by weight of the entire aromatic vinyl monomer, respectively, and after the completion of the polymerization of the first step, the rest of the butadiene polymer, the vinyl cyanide monomer and the aromatic vinyl monomer were charged for the polymerization of the second step.
    • 一种低光泽性热塑性树脂的制造方法,其特征在于,将20〜70重量份的丁二烯聚合物,其中至少70重量%由丁二烯构成,其中20〜70重量份, 总计为15至40重量%的乙烯基氰单体和60至85重量%的芳族乙烯基单体,其特征在于,对于第一步骤的聚合,丁二烯聚合物,乙烯基氰单体和芳族化合物 乙烯基单体的量相当于整个丁二烯聚合物的20至80重量%,全部乙烯基氰单体的20至80重量%和芳族乙烯基单体总量的20至80重量% ,在第一步聚合完成后,加入其余的丁二烯聚合物,乙烯基氰单体和芳族乙烯基单体进行第二步的聚合反应。
    • 4. 发明授权
    • Process for the preparation of maleimide copolymers and thermoplastic
resin composition using the same
    • 用于制备马来酰亚胺共聚物和使用其的热塑性树脂组合物的方法
    • US4804706A
    • 1989-02-14
    • US25628
    • 1987-03-02
    • Kazuo KishidaYutaka ToyookaAtsushi Kimura
    • Kazuo KishidaYutaka ToyookaAtsushi Kimura
    • C08F212/04C08F222/40C08L25/02C08L51/04C08L77/00C08L51/00
    • C08F222/40
    • The present invention provides a process for the preparation of maleimide copolymers by emulsion polymerization of an aromatic vinyl monomer, a vinyl cyanide monomer and a maleimide monomer in specific proportions wherein the polymerization is carried out by charging not less than a specific proportion of the aromatic vinyl monomer and optionally not more than a specific proportion of the vinyl cyanide monomer into the polymerization system before initiation of the polymerization; adding, continuously or dividedly, a mixture composed of the total amount of the maleimide monomer and the remainder of the other monomers to the polymerization system after initiation of the polymerization; maintaining the pH of the aqueous phase of the polymerization system in the range of 3 to 9 at the initiation of said polymerization; and using a redox catalyst containing an oil-soluble organic peroxide. According to this polymerization process, maleimide copolymers having excellent thermal resistance and resistance to thermal decomposition can be prepared in high yield.The present invention also provides a resin composition having excellent thermal resistance, resistance to thermal decomposition, and impact resistance which is formed by blending, in a specific proportion, a maleimide copolymer prepared by the aforesaid process with a rubber-reinforced resin obtained by grafting a vinyl cyanide monomer or the like onto a specific elastomer; and optionally blending the resulting thermoplastic resin composition with a thermoplastic resin that is hard at room temperature.
    • 本发明提供了一种通过芳香族乙烯基单体,乙烯基氰单体和马来酰亚胺单体以特定比例的乳液聚合制备马来酰亚胺共聚物的方法,其中聚合通过将不少于特定比例的芳族乙烯基 单体,并且任选地不超过特定比例的乙烯基氰单体在聚合开始之前进入聚合体系; 在聚合开始后,向马来酰亚胺单体和剩余的其它单体组成的混合物连续地或分开地加入到聚合体系中; 在所述聚合开始时,将聚合体系的水相的pH保持在3〜9的范围内; 并使用含有油溶性有机过氧化物的氧化还原催化剂。 根据该聚合方法,可以高产率制备具有优异的耐热性和耐热分解性的马来酰亚胺共聚物。 本发明还提供一种具有优异的耐热性,耐热分解性和耐冲击性的树脂组合物,其通过以特定比例将通过上述方法制备的马来酰亚胺共聚物与通过将上述方法获得的橡胶增强树脂 乙烯基氰单体等涂覆在特定的弹性体上; 任选地将得到的热塑性树脂组合物与在室温下硬的热塑性树脂共混。
    • 5. 发明授权
    • Process for producing an .alpha.-alkyl-substituted aromatic vinyl
copolymer and a thermoplastic resin composition comprising the copolymer
    • US5057574A
    • 1991-10-15
    • US523269
    • 1990-05-14
    • Makoto UchidaYutaka ToyookaKazuo KishidaAkira NakataNaoki Yamamoto
    • Makoto UchidaYutaka ToyookaKazuo KishidaAkira NakataNaoki Yamamoto
    • C08F212/12C08L25/16
    • C08F212/12C08L25/16
    • A process for producing an .alpha.-alkyl-substituted aromatic vinyl copolymer constituted of 60 to 85 parts by weight of the .alpha.-alkyl-substituted aromatic vinyl monomer, 15 to 35 parts by weight of a vinyl cyanide monomer, and 0 to 40 parts by weight of another vinyl monomer copolymerizable with these monomers, which process is characterized in thatall the amount of the aromatic vinyl monomer necessary for the entire polymerization and such partial amounts of the vinyl cyanide monomer and another copolymerizable vinyl monomer as to give a predetermined copolymer composition with respect to the content of the aromatic vinyl monomer, are first charged and emulsified andthe emulsion polymerization is then initiated and carried out by adding dropwise continuously the residual amounts of the vinyl cyanide monomer and another copolymerizable vinyl monomer in such a manner that the range of change in the content of the aromatic vinyl monomer in the copolymer during the polymerization reaction will not vary more than 2% in the range of conversion of 0 to 90%; and a thermoplastic resin composition comprising[A] 50 to 90% by weight of a copolymer constituted of 60 to 85 parts by weight of an .alpha.-alkyl-substituted aromatic vinyl monomer, 15 to 35 parts by weight of a vinyl cyanide monomer, and 0 to 40 parts by weight of another vinyl monomer copolymerizable with these monomers, the copolymer being produced in such a manner that the range of change in the content of the aromatic vinyl monomer in the copolymer during the polymerization reaction will not vary more than 2% in the range of conversion of 0 to 90, and[B] 10 to 50% by weight of a graft copolymer constituted of 30 to 85 parts by weight of a rubber polymer and 15 to 70 parts by weight of a grafted polymer consisting of a monovinyl aromatic monomer, vinyl cyanide monomer, and another monomer copolymerizable with them in respective proportions of 85-40:0-40:0-80,where the total amount of polymers [A] and [B] is 100% by weight.
    • 10. 发明授权
    • Thermoplastic resin composition of a polycarbonate and vinyl
aromatic-vinyl cyanide comonomers/diene rubber graft copolymer
    • 聚碳酸酯和乙烯基芳族乙烯基氰化物共聚单体/二烯橡胶接枝共聚物的热塑性树脂组合物
    • US4665125A
    • 1987-05-12
    • US798431
    • 1985-11-15
    • Kazuo KishidaHiroshi KawasakiHideyuki Shigemitsu
    • Kazuo KishidaHiroshi KawasakiHideyuki Shigemitsu
    • C08L25/12C08L51/00C08L69/00
    • C08L51/00C08L25/12C08L69/00
    • A thermoplastic resin composition having excellent heat resistance, impact resistance, moldability and platability, which comprises:(i) from 10 to 90% by weight of a thermoplastic polycarbonate;(ii) from 10 to 90% by weight of a graft copolymer obtained by firstly polymerizing a monomer mixture comprising more than 30 and not more than 50% by weight of acrylonitrile and at least 50 and less than 70% by weight of styrene, as monomers for the first stage of graft polymerization, in the presence of a rubber-like polymer, and then polymerizing a monomer mixture comprising from 15 to 40% by weight of acrylonitrile and from 60 to 85% by weight of .alpha.-methylstyrene, as monomers for the second stage of graft polymerization, in the presence of the polymer obtained in the first stage; and(iii) from 0 to 60% by weight of a copolymer obtained by co-polymerizing from 50 to 80% by weight of an aromatic vinyl monomer and from 20 to 50% by weight of a vinyl cyanide monomer;the total amount of components (i), (ii) and (iii) being 100% by weight. The composition is useful for making molded products having excellent heat resistance, impact resistance and platability.
    • 具有优异的耐热性,耐冲击性,成型性和可镀性的热塑性树脂组合物,其包含:(i)10〜90重量%的热塑性聚碳酸酯; (ii)10至90重量%的接枝共聚物,其通过首先将包含大于30重量%至50重量%的丙烯腈和至少50重量%且小于70重量%的苯乙烯的单体混合物聚合而获得,其为 在第一阶段接枝聚合的单体中,在橡胶状聚合物的存在下,然后将包含15-40%(重量)丙烯腈和60-85%(重量)α-甲基苯乙烯的单体混合物聚合成单体 在第一阶段获得的聚合物存在下进行接枝聚合的第二阶段; 和(iii)0至60重量%的通过共聚合50-80重量%的芳族乙烯基单体和20至50重量%的乙烯基氰单体得到的共聚物; 组分(i),(ii)和(iii)的总量为100重量%。 该组合物可用于制备具有优异的耐热性,耐冲击性和可镀性的成型产品。