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Method for preparing diene-based rubber polymer, diene-based rubber polymer prepared thereby, core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising same

A technology of diene rubber and graft copolymer, which is applied in the field of acrylonitrile-butadiene-styrene graft copolymer, can solve the problems of reduced impact resistance, reduced transparency, reduced swelling index, etc., to achieve improved impact Strength properties, improvement of swelling index, effect of low gel content

Active Publication Date: 2017-08-01
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in order to increase the polymerization conversion rate, polymerization is carried out at a relatively high temperature, and therefore, as the polymerization conversion rate increases, the gel content increases rapidly, but the swelling index decreases greatly
When the gel content is higher, clarity increases due to lower swell index, but impact resistance decreases
On the contrary, when the gel content is too low and the swelling index is too high, the impact resistance will increase, but the transparency will decrease

Method used

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  • Method for preparing diene-based rubber polymer, diene-based rubber polymer prepared thereby, core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising same
  • Method for preparing diene-based rubber polymer, diene-based rubber polymer prepared thereby, core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising same
  • Method for preparing diene-based rubber polymer, diene-based rubber polymer prepared thereby, core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising same

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preparation example Construction

[0027] The present invention provides a kind of preparation method of diene rubber polymer, and described diene rubber polymer can have lower gel content and higher swelling index, has higher conversion rate simultaneously, therefore, described The polymer can be easily used as a rubber component of an acrylonitrile-butadiene-styrene graft copolymer of a core-shell structure.

[0028] The method for preparing a diene rubber polymer according to one embodiment of the present invention is characterized by comprising:

[0029] Add 50 parts by weight to 75 parts by weight of conjugated diene monomer, 1 part by weight to 4 parts by weight of emulsifier and 0.1 part by weight to 0.5 parts by weight of molecular weight control agent, and then make them undergo the first the step of aggregation (step 1);

[0030] At the point in time when the polymerization conversion rate in (step 1) is 10% to 40%, 25 parts by weight to 50 parts by weight of conjugated diene monomers are continuousl...

Embodiment 1

[0072] 1) Preparation of diene rubber polymer

[0073] Add 65 parts by weight of ion-exchanged water, 70 parts by weight of 1,3-butadiene, potassium rosinate of 1.5 parts by weight, potassium oleate of 0.8 parts by weight, 0.8 parts by weight of potassium carbonate (K 2 CO 3 ), 0.3 parts by weight of tertiary dodecyl mercaptan (TDDM) and 0.3 parts by weight of potassium persulfate (K 2 S 2 o 8 ), and then reacted at 70° C. until the polymerization conversion reached 30% (the first polymerization). Then, 30 parts by weight of 1,3-butadiene was continuously added over 6 hours, and then, from the time point of continuous addition, the reaction temperature was slowly raised over 10 hours until the reaction temperature reached 80° C. (second polymerization ). In this case, when the polymerization conversion rate reached 55%, 0.05 parts by weight of t-dodecylmercaptan was further added thereto and reacted. Then, when the polymerization conversion rate reached 93%, the reactio...

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Abstract

The present invention relates to a method for preparing a diene-based rubber polymer having a relatively low gel content and a high swelling index while having a high polymerization conversion ratio, to a diene-based rubber polymer prepared thereby, and to a core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising the diene-based rubber polymer as a core. The method for preparing a diene-based rubber polymer and the core-shell structured acrylonitrile-butadiene-styrene graft copolymer comprising the diene-based rubber polymer prepared by the method can be easily applied in an industry in need thereof, especially, an industry of an impact modifier.

Description

technical field [0001] [Cross Reference to Related Application] [0002] This application claims priority from Korean Patent Application No. 10-2014-0181126 filed on December 16, 2014, which is incorporated herein by reference in its entirety. [0003] [technical field] [0004] The present invention relates to a method for preparing a diene rubber polymer having a relatively low gel content and a high swelling index while having a high polymerization conversion rate, a diene rubber polymer prepared therefrom, and a method comprising The diene-based rubber polymer is a core-shell structured acrylonitrile-butadiene-styrene graft copolymer as a core. Background technique [0005] Generally, acrylonitrile-butadiene-styrene (hereinafter referred to as "ABS") resins are widely used in electric power, Electronic parts, office equipment, auto parts, etc. [0006] The properties of the diene-based rubber latex as a rubber component (eg, average particle diameter, etc.) have a...

Claims

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Application Information

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IPC IPC(8): C08F36/06C08F2/22C08F2/38C08F279/02C08F279/04
CPCC08F2/22C08F2/38C08F36/06C08F279/02C08F279/04C08F36/04C08F2/44C08F2/24Y10S525/942
Inventor 金由彬金英玟李镇衡韩受静郑荣焕郑先幸石宰旼
Owner LG CHEM LTD
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