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Method for preparing acrylonitrile-butadiene-styrene latex having high total solid content

A technology for polybutadiene rubber and acrylonitrile is applied in the field of preparing acrylonitrile-butadiene-styrene latex, and can solve problems such as yield reduction and the like

Inactive Publication Date: 2004-03-10
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In particular, although the yield of ABS resin can be increased by increasing the total solid content of the latex in laboratory tests, the yield decreases in real processing due to the shear stress of the stirrer to produce a solidified material, and during transportation or storage Takes time to remove the film that forms on the latex surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (preparation of polybutadiene rubber latex with small diameter)

[0057] 110 parts by weight of ion-exchanged water, 100 parts by weight of 1,3-butadiene monomer, 1.2 parts by weight of potassium rosinate, 2.0 parts by weight of potassium oleate, 0.5 parts by weight of sodium carbonate and 0.3 parts by weight of tertiary dodecyl mercaptan (TDDM) are all placed together in a reactor (autoclave) in order to react the reactants. The reaction was carried out for 10 hours, 0.05 parts by weight of t-dodecylmercaptan was added to the reactant, and the reactant was further reacted at 65° C. for 8 hours, so as to obtain a rubber latex.

[0058] The gel content, swelling index and particle diameter of the rubber latex were measured as follows.

[0059] a) Gel content and swelling index

[0060] After the rubber latex was coagulated by removing the acid or metal salt and washing, the washed rubber latex was dried in a vacuum oven at 60°C for 24 hours to obtain a rubber block, wh...

Embodiment 2

[0079] (preparation of graft polymerized acrylonitrile-butadiene-styrene)

[0080] In addition to the composition according to Table 1, 30 parts by weight of a large-diameter polybutadiene rubber latex with an average particle diameter of 3000 Å, a gel content of 85% and a swelling index of 17, and 25 parts by weight of a large-diameter polybutadiene rubber latex with an average particle diameter of 3000 Å °, gel content is 67% and swell index is 25 weight parts mixtures that the large-diameter polybutadiene rubber latex of 27 forms, prepares the acrylonitrile-butadiene of embodiment 2 in the same manner as embodiment 1 ene-styrene. The polymerization conversion rate of the obtained rubber latex was 99.1 wt%, the total solid content of the rubber latex was 46.3 wt%, and the content of coagulated material was 0.025 wt%. To the resulting material was added 2 parts by weight of aqueous sulfuric acid to coagulate the resulting material, and washed to obtain a powder.

Embodiment 3

[0082] (Preparation of large diameter polybutadiene rubber latex B with high gel content)

[0083] A large-diameter polybutadiene rubber latex having an average particle diameter of 3000 Å, a gel content of 85%, and a swelling index of 17 was prepared in the same manner as in Example 1.

[0084] (preparation of large diameter polybutadiene rubber latex with low gel content)

[0085] A polybutadiene rubber latex was prepared in the same manner as in Example 1 except that AQUARON HS-10 was not added. The average particle diameter of the rubber latex was 3000 Å, its gel content was 69% and its swelling index was 24.

[0086] (preparation of graft polymerized acrylonitrile-butadiene-styrene)

[0087]Except that 0.2 parts by weight of AQUARON HS-10 was added together with other reactants at the beginning of the reaction and also added in the second step reaction, in the same manner as in Example 1, 25 Parts by weight of a large-diameter polybutadiene rubber latex with an average...

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Abstract

The present invention relates to a method of acrylonitrile-butadiene-styrene (ABS) rubber latex, and the acrylonitrile-butadiene-styrene (ABS) rubber latex is prepared by graft-polymerizing butadiene rubber with the monomers of acrlylonitrile and styrene through emulsion-polymerization, so that the ABS rubber latex of the present invention has high solid content. The method of ABS rubber latex of the present invention comprises the step of emulsion-polymerizing i) polybutadiene rubber latex; ii) aromatic vinyl compound; and iii) vinyl cyanide with the addition of a reactive emulsifier. According to the method of the present invention, the ABS rubber latex has high solid content due to a decrease in the amount of coagulated materials and film which is formed on the rubber latex during polymerization, and an increase in the production volume.

Description

[0001] Cross-references to related applications [0002] This application is based on Application No. 2000-66791 filed with the Korean Industrial Property Office on November 10, 2000, the contents of which are incorporated herein by reference. Background of the invention [0003] (a) Technical field [0004] The present invention relates to the method for preparing acrylonitrile-butadiene-styrene (ABS) latex, more particularly, the present invention relates to by emulsion polymerization of styrene monomer, so that styrene monomer is graft-copolymerized, prepares high total solids content method of acrylonitrile-butadiene-styrene latex. [0005] (b) Description of relevant fields [0006] Since acrylonitrile-butadiene-styrene (ABS) resin has excellent properties such as impact strength, chemical resistance, workability and surface gloss, it is often used in monitoring rooms, computer gamers' activities, household appliances and office used in the device. As the use of ABS r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/06C08F279/02C08F279/04C08F285/00C08L51/04C08L55/02
CPCC08F279/04C08F285/00C08L55/02Y10S526/911C08L51/04Y10S525/942C08F279/02C08L2666/02C08F279/06
Inventor 金建洙李灿弘梁柄泰蔡周秉
Owner LG CHEM LTD
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