Aqueous dispersion of polyamide rubber elastic body and method of producing the same

Inactive Publication Date: 2010-09-16
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]As the amount of the surfactant in the aqueous dispersion of polyamide rubber elastic body is controlled relative to the polyamide rubber elastic body, the aqueous dispersion can produce a

Problems solved by technology

However, molded articles obtained from the aqueous dispersion of a styrene rubber elastic body are generally inferior in abrasion resistance, flex resistance, oil resistance, and w

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

Example 1

[0052]A 500-ml separable flask was charged with 16 g of a polyether ester block amide copolymer (trade name: Pebax 2533SA01, melting point 134° C., manufactured by Arkema, Ltd.), 123 g of toluene and 61 g of isopropyl alcohol, and the copolymer was dissolved at 80° C. under stirring for 4 hours. To the resulting organic phase solution was added an aqueous solution prepared by dissolving 5.3 g of sodium polyoxyalkylene lauryl ether sulfate (trade name: Trax ET-314, 30 wt % active ingredient, manufactured by NOF Corporation) in 100 g of water. The resulting mixture was stirred and mixed for 2 minutes by means of a homomixer (trade name: TK Homomixer Type M, manufactured by Tokushu Kika Kogyo Co., Ltd.) to give an emulsion. The number of revolutions and temperature during stirring and mixing were set at 12,000 rpm and 40° C., respectively. The resulting emulsion was heated to 40 to 70° C. at a reduced pressure of 40 to 90 kPa thereby distilling off toluene and isopropyl alcoho...

Example

Example 2

[0053]An aqueous dispersion of polyamide rubber elastic body was obtained in the same manner as in Example 1 except that an aqueous solution prepared by dissolving 4.3 g of sodium polyoxyalkylene lauryl ether sulfate (trade name: Trax ET-314, wt % active ingredient, manufactured by NOF Corporation) and 0.3 g of polyvinyl alcohol (trade name: Gosenol GH-20, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) in 100 g of water was added to the organic phase solution.

Example

Example 3

[0054]An aqueous dispersion of polyamide rubber elastic body was obtained in the same manner as in Example 1 except that 2.0 g of sodium dioctylsulfosuccinate (trade name: Rapisol A-80, 80 wt % active ingredient, manufactured by NOF Corporation) was used in place of 5.3 g of sodium polyoxyalkylene lauryl ether sulfate (trade name: Trax ET-314, 30 wt % active ingredient, manufactured by NOF Corporation).

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Abstract

An aqueous dispersion of polyamide rubber elastic body, which contains an aqueous medium and a polyamide rubber elastic body emulsified and dispersed in the aqueous medium in the presence of a surfactant. The surfactant is used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the polyamide rubber elastic body, and is for example at least one member selected from the group consisting of a polyoxyalkylene alkyl ether sulfate, a dialkyl sulfosuccinate, a fatty acid salt and an ethylene oxide/propylene oxide copolymer. This aqueous dispersion can produce a molded article having the characteristics of the polyamide rubber elastic body, particularly a molded article which hardly suffers from bleeding of the surfactant and is excellent in transparency.

Description

TECHNICAL FIELD[0001]The present invention relates to an aqueous dispersion of rubber elastic body and a method of producing the same and in particular to an aqueous dispersion of polyamide rubber elastic body and a method of producing the same.BACKGROUND ART[0002]A polymeric rubber elastic body essentially has either a soft polymer structure or a structure consisting of a rigid polymer system combined with a soft polymer system, and is used in a wide variety of industrial fields because it has rubber elasticity at ordinary temperatures and it can be mechanically molded due to its plasticization at high temperatures similar to thermoplastics. Typical polymeric rubber elastic bodies include those based on styrene, olefin, polyester, polyurethane, polyvinyl chloride, and polyamide. These polymeric rubber elastic bodies are usually provided as molded articles produced by mechanical operation such as extrusion molding, and when used in coating agents for various materials, adhesives, bi...

Claims

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Application Information

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IPC IPC(8): C08K5/41C08K5/101C08L77/00C08G69/48
CPCC08G69/40C08J3/05C08L77/12C08L77/06C08J2377/12
Inventor SUGIHARA, NORIHIROSAKATA, JUNFUJITA, HIROFUMI
Owner SUMITOMO SEIKA CHEM CO LTD
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