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    • 7. 发明授权
    • Process for the production of heat resistant methacrylic resin
    • 生产耐热甲基丙烯酸树脂的方法
    • US4661571A
    • 1987-04-28
    • US780903
    • 1985-09-27
    • Yasuyuki KatoMasahiro YuyamaMasahiko MoritaniSusumu Iijima
    • Yasuyuki KatoMasahiro YuyamaMasahiko MoritaniSusumu Iijima
    • C08F2/38C08F20/14C08F2/00
    • C08F20/14
    • An improved process for the production of a methacrylic polymer having excellent heat resistance, which comprises radical-polymerizing a monomer or monomer mixture consisting of 80 to 100% by weight of methyl methacrylate and 0 to 20% by weight of a copolymerizable vinyl monomer in the presence of a polymerization initiator and one or more of specific chain transfer agents selected from the group consisting of(A) 2-mercaptoethyl alkanecarboxylate of the formula: ##STR1## wherein R is an alkyl having 4 to 12 carbon atoms,(B) alkyl 3-mercaptopropionate of the formula: ##STR2## wherein R is an alkyl having 4 to 18 atoms. The methacrylic resin prepared by this invention has excellent heat resistance and can give formed products having excellent heat resistance (high heat distortion temperature) without increase of monomer content processing thereof.
    • 一种用于制备具有优异耐热性的甲基丙烯酸类聚合物的改进方法,其包括使由80至100重量%的甲基丙烯酸甲酯和0至20重量%的可共聚乙烯基单体组成的单体或单体混合物自由基聚合 存在聚合引发剂和一种或多种选自(A)下式的(A)2-巯基乙基链烷羧酸酯的特定链转移剂:其中R是具有4至12个碳原子的烷基(1) B)下式的3-巯基丙酸烷基酯:其中R是具有4-18个原子的烷基。 通过本发明制备的甲基丙烯酸树脂具有优异的耐热性,并且可以提供具有优异的耐热性(高热变形温度)的成型产品,而不增加其单体含量处理。
    • 10. 发明授权
    • Process for the continuous casting of liquid polymerizable compositions
    • 液体可聚合组合物的连续流延方法
    • US4089918A
    • 1978-05-16
    • US643631
    • 1975-12-23
    • Yasuyuki KatoMasahiko MoritaniSeiichi Suzuki
    • Yasuyuki KatoMasahiko MoritaniSeiichi Suzuki
    • C08F2/00B01J14/00B29C39/00B29C39/16C08F2/02
    • B29C39/16B29C39/006
    • A process and apparatus for the continuous casting of a liquid polymerizable composition comprising feeding the liquid polymerizable composition together with a pair of continuous gaskets into a spacing between a pair of moving endless belts arranged such that the lower run of the upper belt is disposed above the upper run of the lower belt and said runs are driven concurrently in the same direction at substantially the same speed, said gaskets being fed such that they circumscribe both side end portions of the spacing to form a cavity, while moving together with the moving belts and keeping in contact with the opposing surfaces of the belts. Passing the composition through a portion of the path of the belts to partially polymerize said composition to such a viscosity that a common logarithm of its viscosity in terms of poise at the temperature of polymerization is within the range of 2 to 5, then passing a portion of the path thereof arranged so as to be curved at least once to bring its degree of polymerization within the range of 40 to 60 weight per cent, and thereafter passing the composition through a straight portion of the path for complete polymerization, said path for polymerization being arranged such the lower and upper runs of the respective belts are brought closer together to follow shrinkage of the composition upon polymerization. Finally the resultant polymerized plate product with a good preciseness in thickness in the widthwise direction and with favorable surface qualities is removed, from the discharge end of the belts.
    • 一种用于液体可聚合组合物的连续铸造的方法和装置,包括将液体可聚合组合物与一对连续的垫片一起进给到一对移动的环形带之间的间隔中,所述间隔布置成使得上部带的下游位于 下皮带的上游和所述跑道以基本上相同的速度在相同的方向上同时被驱动,所述垫圈被进给,使得它们围绕间隔的两个侧端部分以形成空腔,同时与移动带一起移动, 保持与带的相对表面接触。 将组合物通过带的路径的一部分以部分地将所述组合物聚合到这样的粘度,使得其在聚合温度下的平均粘度的常用对数在2至5的范围内,然后通过一部分 其路径布置成至少弯曲一次以使其聚合度在40至60重量%的范围内,然后使组合物通过用于完全聚合的路径的直线部分,所述聚合路径 被布置成使得各个带的下部和上部运行更靠近在一起以跟随聚合时组合物的收缩。 最后,从带的排出端去除在宽度方向上具有良好的厚度精确度和良好的表面质量的所得聚合板产品。