KR960022775A - Method for producing a thermoplastic resin composition excellent in impact resistance and surface gloss - Google Patents

Abstract

The present invention relates to a method for producing a thermoplastic resin composition which greatly improves the appearance and glossiness of a resin surface and always obtains uniform properties while maintaining the physical properties of impact resistance and fluidity as much as possible. And 0.28 ~ 0.38㎛ rubber at the same time, and the total butadiene rubber polymer latex 30 to 50 parts by weight and the monomer mixture 70 to 50 parts by weight, but the average particle diameter of 0.08 ~ 0.15㎛ rubber latex and monomer A part of the mixture was added to prepare a first graft latex by emulsion polymerization method, and in the presence of the prepared first graft latex, a rubber latex having an average particle diameter of about 0.28 to 0.38 μm was added at a time, and then a residual amount of monomer was added. It is characterized by consisting of a secondary graft reaction to complete the graft reaction by the method of continuous input.

Description

Method for producing a thermoplastic resin composition excellent in impact resistance and surface gloss

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Claims (8)

30 to 50 parts by weight of the total butadiene rubbery polymer latex and the monomer mixture 70 to 50 weight in preparing a graft copolymer in which a rubber having an average particle diameter of about 0.08 to 0.15 μm and a rubber of about 0.28 to 0.38 μm are mixed together 1) 140 parts of ion-exchanged water, emulsifier and redox composition are added in the state where 30-50% by weight of the rubbery latex has a particle size of 0. After the temperature was raised to ˜75 ° C., when the temperature of the mixture reached 60 ° C. to 75 ° C., some of the styrene and acrylonitrile monomer mixtures, molecular weight modifiers, and polymerization initiators were continuously added over 30 minutes to 2 hours, and the polymerization conversion rate was 90% or more. 1 step reaction to prepare the first graft latex, and 2) a residual amount of rubber (70-50% by weight) having an average particle diameter of 0.28 to 0.38 µm in the presence of the prepared first graft latex at a time. Ha After the mixture temperature is 50 ~ 65 ℃, put the remaining amount of monomer mixture and molecular weight control agent into a container which can be stirred and stir for 10 minutes, and then continuously add it for 1 to 5 hours, and also add the polymerization initiator continuously to the secondary. Method for producing a thermoplastic resin composition excellent in surface gloss and impact resistance, characterized in that consisting of a two-step reaction to produce graft latex. The monomer composition ratio of styrene and acrylonitrile according to claim 1, wherein the monomer input ratio during the first and second graft polymerization is 10 to 40% for the first and 50 to 60% for the second to 100 parts by weight of the total graft monomer mixture. A method for producing a thermoplastic resin composition excellent in surface gloss and impact resistance, characterized in that the polymerization is carried out at 73:27. The method according to claim 1, wherein when the secondary graft latex is manufactured, a rubber having a polymerization conversion rate of 0.28-0.38 µm at a polymerization conversion rate of 90% or more is added at a time, and the temperature of the mixture is 50-65 ° C. A method for producing a thermoplastic resin composition having excellent surface gloss and impact resistance. The method of manufacturing a thermoplastic resin composition having excellent surface gloss and impact resistance according to claim 1, wherein the polymerization temperature is 65 to 75 ° C. when preparing the first graft latex. The method of manufacturing a thermoplastic resin composition having excellent surface gloss and impact resistance according to claim 1, wherein the polymerization temperature is 60 to 80 ° C. when preparing the second graft latex. The method according to claim 1, wherein cumene hydroperoxide is used as a polymerization initiator in the preparation of the first and second graft latex, and 30 to 2 hours for the first graft latex and 1 to 5 hours for the second graft latex. Method of producing a thermoplastic resin composition excellent in surface gloss and impact resistance characterized in that the continuous injection over. The method according to claim 1, wherein in the preparation of the first and second graft latexes, a tiserydodecylmercaptan is used as a molecular weight control agent and mixed with styrene and an acrylonitrile monomer in the first 30 minutes to 2 hours and the second 1 to 5 hours. Method of producing a thermoplastic resin composition excellent in surface gloss and impact resistance characterized in that the continuous injection over. The thermoplastic resin composition having excellent surface gloss and impact resistance according to claim 1, wherein the final polymerization conversion rate is 90 to 98% and the final solid content is 38 to 44% after the completion of the reaction of the first and second graft latexes. Manufacturing method. ※ Note: The disclosure is based on the initial application.