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Method for manufacturing foam rubber

A foam rubber and a manufacturing method technology, applied in the foam rubber manufacturing field, can solve problems such as poor elasticity and durability of the puff, and achieve the effect of excellent elasticity and durability

Active Publication Date: 2020-03-06
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the technique of this patent document 1, the puff obtained may be poor in elasticity and durability against moisture such as water-based cosmetics.

Method used

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  • Method for manufacturing foam rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Manufacture of polymer latex

[0113] In a pressure-resistant reaction vessel, add 200 parts of water, 1.5 parts of potassium oleate, 38 parts of acrylonitrile, 0.5 parts of tert-dodecyl mercaptan, 0.03 parts of sodium formaldehyde sulfoxylate, and 0.003 parts of sulfuric acid Ferrous iron, 0.008 parts of sodium edetate, and 45 parts of 1,3-butadiene and 17 parts of isoprene were added after fully degassing.

[0114]Next, 0.05 parts of cumene hydroperoxide was added as a polymerization initiator, and emulsion polymerization was initiated at a reaction temperature of 5°C. When the polymerization conversion rate reached 95%, a polymerization terminator solution containing 0.25 parts of diethylhydroxylamine and 5 parts of water was added to terminate the polymerization reaction to obtain an emulsion.

[0115] Then, after removing unreacted monomers from the obtained emulsion, 0.01 part of modified hydrocarbon oil (trade name "DF714S", manufactured by Seiko PMC Co., Ltd....

Embodiment 2

[0122] The usage amount of the antifoaming agent was changed from 0.01 part to 0.02 part, and the conditions of the particle size increasing treatment were changed to a rotation speed of 1200 rpm and a stirring time of 4.8 hours, except that it was carried out in the same manner as in Example 1 to produce a polymer latex The polymer latex and the foam rubber were evaluated in the same manner as the foam rubber. In addition, in Example 2, the solid content concentration of the polymer latex after the concentration treatment was 66.1% by weight. The results are shown in Table 1.

Embodiment 3

[0124] The usage amount of the antifoaming agent was changed from 0.01 part to 0.1 part, and the conditions of the particle size increasing treatment were changed to 900 rpm and stirring time of 4.5 hours, except that, the same procedure as in Example 1 was carried out to produce the polymer latex The polymer latex and the foam rubber were evaluated in the same manner as the foam rubber. In addition, in Example 3, the solid content concentration of the polymer latex after the concentration treatment was 66.0% by weight. The results are shown in Table 1.

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PUM

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Abstract

Provided is a method for manufacturing a foam rubber by foaming a polymer latex, wherein the method for manufacturing a foam rubber uses, as said polymer latex, a polymer latex in which the concentration of solid content is 60.0 wt% or more; the volume cumulative particle diameter d10 is greater than 140 nm in a volume-based particle diameter distribution; and the content of an antifoaming agent is 0.001-1.0 parts by weight with respect to 100 parts by weight of a polymer in said polymer latex.

Description

technical field [0001] The present invention relates to a method for producing foam rubber capable of appropriately controlling foaming and excellent in elasticity and durability. Background technique [0002] Foam rubber (rubber foam) produced using polymer latex is used in various applications such as mattresses, powder puffs (cosmetic sponges), rollers, and shock absorbers. In the use of such a foam rubber, especially as a foam rubber for puffs, it is required to have a good foam state, a uniform foam structure, and an excellent balance between elasticity and texture. [0003] For example, Patent Document 1 discloses a method of producing a puff using a copolymer latex whose solid content concentration, gel content, and Mooney viscosity are controlled within specific ranges. However, according to the technique of this patent document 1, the obtained puff may have poor elasticity and durability against moisture such as water-based cosmetics. [0004] prior art literature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/30C08F236/12
CPCC08F236/12C08J9/30C08J2201/026C08J2309/04C08J9/228
Inventor 谷山友哉羽根田英和
Owner ZEON CORP
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