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Diene-based rubber latex, manufacturing method thereof, and core-shell structured graft copolymer comprising same

A diene rubber and latex technology, applied in the field of graft copolymers, can solve the problems of economy and time loss, reduce latex temperature, long reaction time, etc., achieve excellent tensile strength and melt flow index, and improve impact strength. and gloss, the effect of small solid coagulum parts

Active Publication Date: 2020-12-04
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve these limitations, a method of mixing and using diene rubber latex having a large diameter and a small diameter has been proposed, but the effect of sufficiently improving both impact strength and gloss has not been exhibited, and the physical performance issues
[0007] In order to solve these problems, it has been proposed to use two kinds of diene rubber latexes with different average particle diameters to polymerize the ABS grafted resin, and then mix them with a particle size larger than that of the above two kinds of diene rubber latexes in the process of extruding the resin. Diene-based rubber latex with average particle diameter, or a method of mixing three kinds of diene-based rubber latex with different average particle diameters during extrusion, but this method causes serious economical and time loss because it is necessary to prepare each diene rubber latex
[0008] In addition, generally, a diene-based rubber latex having a large diameter is prepared by: 1) a polymerization method using an acid, an alkali, or the like; 2) a polymerization method by increasing the amount of an inorganic electrolyte or greatly reducing the amount of an emulsifier; 3) A method of preparing latex and then lowering the temperature of the latex to aggregate; 4) a method of preparing latex and then increasing the latex by mechanical or chemical aggregation, etc., by these methods, the reaction time is very long, a large amount of solid coagulum is generated, and post-processing is required. Processing to make the latex bigger, reducing productivity

Method used

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  • Diene-based rubber latex, manufacturing method thereof, and core-shell structured graft copolymer comprising same
  • Diene-based rubber latex, manufacturing method thereof, and core-shell structured graft copolymer comprising same
  • Diene-based rubber latex, manufacturing method thereof, and core-shell structured graft copolymer comprising same

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preparation example Construction

[0062] In addition, the present invention provides a method for preparing the diene rubber latex.

[0063] The preparation method according to one embodiment of the present invention is characterized in that it includes: performing the first polymerization of the first conjugated diene monomer in the presence of an emulsifier and a fat-soluble polymerization initiator to prepare a polymerization conversion rate of 30%. to 40% of the first polymerization reactant (step a); injecting a water-soluble polymerization initiator into said first polymerization reactant, and increasing the temperature to prepare a second polymerization reaction having a polymerization conversion rate of 60% to 70% A reactant (step b); injecting a second conjugated diene-based monomer into said second polymerized reactant, and performing a third polymerization to prepare a third polymerized reactant having a polymerization conversion rate of 85% to 93% (step c); and injecting polymer aggregates with an ...

preparation Embodiment 1

[0104] Into the polymerization reactor (autoclave) that nitrogen replaces, inject the ion-exchanged water of 62 weight parts, the dioctyl sodium sulfosuccinate of 0.06 weight part, the ethyl acrylate of 30 weight parts, the methyl acrylate of 1 weight part Acrylic acid, 0.15 parts by weight of ethylene glycol dimethacrylate, 0.15 parts by weight of tert-dodecyl mercaptan (TDDM), and 0.3 parts by weight of potassium persulfate were used for emulsion polymerization at 70°C. During the polymerization, when the polymerization conversion rate reached 90%, 62 parts by weight of butyl acrylate, 7 parts by weight of methacrylamide and 0.3 parts by weight of tert-dodecyl mercaptan were mixed and heated for 4 hours. It was injected at a constant rate, and at the same time, respectively, 1.3 parts by weight of potassium persulfate and 0.06 parts by weight of dioctyl sodium sulfosuccinate were injected at a constant rate over 5 hours, and emulsion polymerization was performed at 70°C. The...

preparation Embodiment 2

[0106] Into the polymerization reactor (autoclave) of nitrogen replacement, inject the ion-exchanged water of 62 parts by weight, the dioctyl sodium sulfosuccinate of 0.05 parts by weight, the ethyl acrylate of 30 parts by weight, the methyl acrylate of 1 part by weight Acrylic acid, 0.15 parts by weight of ethylene glycol dimethacrylate, 0.15 parts by weight of tert-dodecyl mercaptan (TDDM), and 0.3 parts by weight of potassium persulfate were used for emulsion polymerization at 70°C. During the polymerization, when the polymerization conversion rate reached 90%, 62 parts by weight of butyl acrylate, 7 parts by weight of methacrylamide and 0.3 parts by weight of tert-dodecyl mercaptan were mixed and heated for 4 hours. It was injected at a constant rate, and at the same time, respectively, 1.3 parts by weight of potassium persulfate and 0.06 parts by weight of dioctyl sodium sulfosuccinate were injected at a constant rate over 5 hours, and emulsion polymerization was performed...

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Abstract

The present invention relates to diene-based rubber latex having an ultra large diameter containing a polymer aggregate, a method for manufacturing same, and a graft copolymer having a core-shell structure having excellent impact strength and surface properties comprising same. The present invention provides diene-based rubber latex in which based on 100% by weight of the total rubber particles, 14% to 26% by weight exhibits a particle diameter of 100 nm or more and less than 300 nm, 62% to 81% by weight exhibits a particle size of 300 nm or more and less than 800 nm, and 5% to 14% by weight exhibits a particle size of 800 nm or more and less than 1,000 nm.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit and priority of Korean Patent Application No. 10-2018-0166285 filed on December 20, 2018 and Korean Patent Application No. 10-2019-0099410 filed on August 14, 2019, both of which The entire content of this patent application is incorporated into this specification by reference. technical field [0003] The present invention relates to a diene-based rubber latex containing polymer aggregates and having an ultra-large diameter, a method for preparing the same, and a graft copolymer having a core-shell structure comprising the diene-based rubber latex and Has excellent impact strength and surface properties. Background technique [0004] Generally, acrylonitrile-butadiene-styrene graft resins (hereinafter referred to as ABS graft resins) have relatively good physical properties such as impact resistance, mechanical strength, moldability and gloss, and are widely use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/04C08F220/56C08F279/04C08F6/18
CPCC08F6/22C08F279/06C08F220/1804C08L9/04C08L9/08C08L9/10C08L11/02C08L51/00C08F220/1802C08F220/56C08F220/02C08F222/102C08F212/08C08F220/44C08F236/04C08F279/04C08F6/18C08F236/06
Inventor 朴昶弘郑荣焕金英旼
Owner LG CHEM LTD
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