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Process for vulcanizing rubber at a low temperature
| Details |
Inventors: Maeda, Isamu; Aoshima, Masashi;
Assignee: Sumitomo Chemical Company, Limited (Osaka, JP)
Primary Examiner: Bleutge; John C.
Assistant Examiner:
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher
A process for vulcanizing a rubber base comprising at least one halogen-containing amorphous polymer at a low temperature ranging from 5.degree. to 85.degree. C., which comprises carrying out the vulcanization in the presence of 0.01 to 20 parts by weight of an organic hydroperoxide and/or ketone peroxide per 100 parts by weight of the rubber base. In the above process, at least one member selected from the group consisting of (I) the oxides of metals, such as zinc, lead, chromium, cobalt, nickel, magnesium, manganese, copper and iron, or the metallic salts of said metals with aliphatic or cycloaliphatic carboxylic acid having 8 to 24 carbon atoms; (II) methacrylic esters; (III) maleimides; and (IV) oximes, may be used as a vulcanization activator or a vulcanization accelerator in an amount of 0.01 to 20 parts by weight per 100 parts by weight of the rubber base. |
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DETAILED DESCRIPTION What is claimed is: 1.
A process for vulcanizing a non-aqueous chloroprene rubber base comprising chloroprene rubber at a low temperature consisting essentially of vulcanizing said non-aqueous chloroprene rubber base at a temperature ranging from 5.
degree.
to 85.
degree.
C.
in the presence of 0.
01 to 20 parts by weight of at least one vulcanizing agent selected from the group consisting of an organic hydroperoxide and ketone peroxide per 100 parts by weight of said chloroprene rubber, and 0.
01 to 20 parts by weight of at least one vulcanization activator or accelerator selected from the group consisting of oxides of zinc, lead, chromium, cobalt, nickel, magnesium, manganese, copper, and iron per 100 parts by weight of said chloroprene rubber.
2.
A process as defined in claim 1, wherein the amount of the vulcanizing agent is in a range of 0.
5 to 15 parts by weight.
3.
A process as defined in claim 1, wherein the vulcanizing agent is selected from the group consisting of alpha-cumyl hydroperoxide, tertiary-butyl hydroperoxide, p-menthane hydroperoxide, m,p-diisopropylbenzene monohydroperoxide, methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide and acetylacetone peroxide.
4.
A process as defined in claim 1, wherein the vulcanizing agent is alpha-cumyl hydroperoxide.
5.
The process of claim 1 wherein said vulcanization activator or accelerator is zinc oxide.
Description:
The present invention relates to a process for vulcanizing at least one halogen-containing amorphous polymer at a low temperature.
More particularly, it pertains to a process for vulcanizing at least one halogen-containing amorphous polymer at a low temperature, in which an organic hydroperoxide and/or ketone peroxide as a vulcanizing agent is used alone or in combination with a specific vulcanization activator or accelerator to achieve the vulcanization at a temperature as low as from 5.
degree.
to 85.
degree.
C.
As the known literature references concerning a low temperature vulcanization process using an organic hydroperoxide as a vulcanizing agent, there are Japanese Pat
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