Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing rubber latex

A rubber latex and compound technology, applied in the field of rubber latex preparation, can solve the problem of incomplete seed shells and other problems

Active Publication Date: 2007-07-04
LG CHEM LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the monomers are added all at once, it can cause problems with incomplete shell formation on the seeds

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (preparation of seeds)

[0032]Add together 150 parts by weight of ion-exchanged water, 100 parts by weight of styrene as a monomer, 2.0 parts by weight of potassium oleate as an emulsifier, 3 parts by weight of Allyl methacrylate, and 0.3 parts by weight of potassium persulfate as an initiator. The reaction was performed at 70°C for 4 hours to prepare seeds.

[0033] The prepared seeds had a particle size of 1300 Ȧ.

[0034] (preparation of the shell)

[0035] 10 parts by weight of the above-prepared seeds, 70 parts by weight of ion-exchanged water, 90 parts by weight of 1,3-butadiene as a monomer, and 1.2 parts by weight of an emulsifier were added together into a polymerization reactor flushed with nitrogen. Potassium rosinate and 1.0 parts by weight of potassium oleate, 0.7 parts by weight of sodium carbonate and 0.8 parts by weight of potassium bicarbonate as electrolytes, 0.3 parts by weight of t-dodecanethiol (TDDM) as a molecular weight regulator, and 0.3 par...

Embodiment 2

[0038] 10 parts by weight of the seeds prepared above, 75 parts by weight of ion-exchanged water, 72 parts by weight of 1,3-butadiene as a monomer, and 1.2 parts by weight of an emulsifier were added together into a polymerization reactor flushed with nitrogen. Potassium rosinate and 1.0 parts by weight of potassium oleate, 0.7 parts by weight of sodium carbonate and 0.8 parts by weight of potassium bicarbonate as electrolytes, 0.3 parts by weight of t-dodecanethiol (TDDM) as a molecular weight regulator, and 0.3 parts by weight Potassium persulfate as initiator. As the polymerization started at 70°C, the condenser was started so that the 1,3-butadiene condensate condensed by the condenser was recycled to the polymerization reactor. The reaction was carried out at 70° C. for 13 hours, and then 18 parts by weight of the remaining monomer or 1,3-butadiene, and 0.03 parts by weight of t-dodecanethiol were added together. The reaction was further carried out at 75°C for 24 hours....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
degree of graftingaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for preparing rubber latex. The method of the present invention is characterized in that hard polymer seed is fed into a polymerization reactor equipped with a condenser before the commencement of polymerization and that the condenser is operated from the start of the polymerization, so that the condensate containing the conjugated diene compound is fed into the polymerization reactor with the commencement of the polymerization. In accordance with the method for preparing rubber latex of the present invention, it is possible to prepare core-shell type rubber latex capable of maximizing surface grafting ratio of rubber latex without sacrificing uniformity of polymerization system and particle stabilization and prepare resin having superior impact resistance, coloring property and appearance property(luster), when applied to ABS resins.

Description

technical field [0001] The present invention relates to a method for preparing rubber latex. Specifically, the present invention relates to a method for producing rubber latex by emulsion polymerization using a polymerization reactor equipped with a condenser. More specifically, the present invention relates to a process capable of making ABS (acrylonitrile-butadiene-styrene) Resin is a method of rubber polymer with excellent impact resistance, colorability and gloss. Background technique [0002] According to US 4,024,329, polymerization is started at a temperature 5-10° C. lower than the predetermined polymerization temperature, and the temperature in the polymerization reactor is gradually raised to the predetermined polymerization temperature by reaction heat. In case of excessive heating caused by the heat of reaction, the condenser was opened to remove the heat. However, this method is not ideal because the temperature at which polymerization starts greatly affects ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F2/44
CPCC08F2/22C08F2/44C08F285/00C08L55/02C08F257/02C08F265/04C08F279/04C08F265/08C08L51/003C08L2666/02C08L2666/24C08F2/18
Inventor 郑有城朴东镇俞根勋李灿弘
Owner LG CHEM LTD