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Rubber composition containing butyl rubber, resol type phenol-formaldehyde co-condensed resin, and phenol

A technology of rubber composition and copolycondensation resin, applied in the field of phenolic rubber composition, can solve problems such as corrosion of metal molds, achieve improved processability and formability, avoid sticking, excellent swelling resistance and solvent resistance Effect

Active Publication Date: 2020-11-24
TAOKA CHEM COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the above-mentioned compound or resin having a halogen atom, or an organic acid is used as a crosslinking accelerator, problems such as corrosion of metal molds during crosslinking molding of butyl rubber arise.

Method used

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  • Rubber composition containing butyl rubber, resol type phenol-formaldehyde co-condensed resin, and phenol
  • Rubber composition containing butyl rubber, resol type phenol-formaldehyde co-condensed resin, and phenol
  • Rubber composition containing butyl rubber, resol type phenol-formaldehyde co-condensed resin, and phenol

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Embodiment

[0068] Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to the following Example at all. In addition, the softening point of the following resole type phenol formaldehyde polycondensation resin is the value measured by the method based on JISK2207.

manufacture example 1

[0070]

[0071] To a four-necked flask equipped with a reflux condenser and a thermometer, 300 g (2.00 moles) of p-tert-butylphenol, 130 g (4.00 moles) of 92% by weight paraformaldehyde, and 8.33 g (0.10 moles) of 48% by weight sodium hydroxide aqueous solution were added. and 150 g of toluene, and while stirring, the internal temperature was raised to 65° C., then stirred at this temperature for 1 hour, and then heated to 88° C., and then stirred at this temperature for 5 hours.

[0072] Thereafter, it was cooled to 65°C, 84 g of water, 90 g of toluene, and 16.4 g of 30% by weight sulfuric acid were added and stirred, then left still and liquid-separated to obtain a toluene layer. Thereafter, the water washing of the toluene layer was repeated three times.

[0073] Next, the toluene layer containing the resin was concentrated under normal pressure for 1 hour until the internal temperature reached 118°C, and then concentrated under reduced pressure for 1 hour until the degre...

Embodiment 1

[0075]

[0076] 50 g of Tackirol 201 (softening point: 88°C, manufactured by Tagoka Chemical Industry Co., Ltd., hereinafter sometimes referred to as resin 201) which is a copolycondensation resin of p-t-tert-octylphenol-formaldehyde) and 1,1,2,2- Add 4.0 g of tetrakis(4-hydroxyphenyl)ethane (hereinafter sometimes referred to as THPE) into a mortar, and mix while coarsely pulverizing with a pestle at 25° C. to obtain resin mixture A-1 containing THPE (THPE content 7.4% by weight) 54g.

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Abstract

Provided are: a rubber composition containing a butyl rubber, a resol type phenol-formaldehyde co-condensed resin, and a phenol, wherein the rubber composition contains, as the phenol, at least one phenol chosen from the group consisting of phenols represented by general formulas (1), (2), (3) and (4); a production method therefor; and a resin mixture containing a resol type phenol-formaldehyde co-condensed resin, and at least one phenol chosen from the group consisting of phenols represented by general formulas (1), (2), (3) and (4).

Description

technical field [0001] The present invention relates to a rubber composition comprising butyl rubber, resole type phenolic formaldehyde polycondensation resin and phenols with specific structure. Background technique [0002] Butyl rubber (IIR) has excellent heat aging resistance, chemical resistance, weather resistance and other environmental resistance and electrical properties, and is suitable for various rubber products. However, butyl rubber is a copolymer of isobutylene and a small amount of isoprene, and has few unsaturated bonds serving as crosslinking points, so the crosslinking speed is slow, and applicable crosslinking methods are also limited. [0003] As a crosslinking method of industrial butyl rubber, a method of using a resole type phenolic formaldehyde polycondensation resin as a crosslinking agent is generally used. [0004] On the other hand, when butyl rubber is cross-linked by a method using a resole-type phenolic formaldehyde polycondensation resin as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08G8/10C08K5/13C08K5/42C08L61/10
CPCC08L23/22C08K5/13C08J3/20C08G8/10C08K5/42C08L61/06C08K5/375C08J5/24
Inventor 尾崎文哉佐藤伸行
Owner TAOKA CHEM COMPANY
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