Release agent for vulcanized rubber molding
AssigneeDai-Ichi Kogyo Seiyaku Co., Ltd.
InventorsShigeru Kigasawa, Toshikazu Nabeshima, Takuya Horie
Life of this patent
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Abstract
Provided is a release agent for vulcanized rubber molding, the release agent exhibiting good mold releasability between a mold and a rubber after vulcanization and capable of being easily removed after production. The release agent for vulcanized rubber molding contains a polyoxyalkylene glyceryl ether (A). The polyoxyalkylene glyceryl ether (A) contains 50% to 95% by mass of oxyethylene groups in 100% by mass of oxyalkylene groups. The polyoxyalkylene glyceryl ether (A) preferably has a number-average molecular weight of 2,000 to 20,000.
Claims16
A release agent, comprising:
- a polyoxyalkylene glyceryl ether (A), which contains 50% to 95% by mass of oxyethylene groups based on a total content of oxyalkylene groups in the release agent, wherein the oxygen atom(s) at the end(s) of the polyoxyalkylene chain(s) of the polyoxyalkylene glyceryl ether is(are) connected with H;
- and
- a polyoxyalkylene diol (B).
A release agent, comprising:
- a polyoxyalkylene glyceryl ether (A), which contains 50% to 95% by mass of oxyethylene groups based on a total content of oxyalkylene groups in the release agent, wherein the polyoxyalkylene glyceryl ether is a reaction product of a glycerin mainly with only alkylene oxide(s).
A release agent, comprising:
- a polyoxyalkylene glyceryl ether (A), which contains 50% to 95% by mass of oxyethylene groups based on a total content of oxyalkylene groups in the release agent, and
- a polyoxyalkylene diol (B).
Dependencies are inferred from the claim text.