# US 10,870,222 B2 · Release agent for vulcanized rubber molding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,222 B2 - Document ID: US10870222B2 - Status: Granted - Kind: B2 - Application number: 15/569,834 - Filed: 2016-01-18 - Published: 2018-05-10 - Granted: 2020-12-22 - Earliest claimed: 2015-05-15 - Assignees: Dai-Ichi Kogyo Seiyaku Co., Ltd. - Applicants: Dai-Ichi Kogyo Seiyaku Co., Ltd. - Inventors: Shigeru Kigasawa; Toshikazu Nabeshima; Takuya Horie - Web page: https://patentgrep.com/patent/US10870222B2 ## CPC - B29C 33/62: based on polymers or oligomers - C08G 65/08: Saturated oxiranes - C08G 65/2609: {containing aliphatic hydroxyl groups} - C08G 65/2615: {the other compounds containing carboxylic acid, ester or anhydride groups} - C08L 71/00: Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers - C08L 71/02: Polyalkylene oxides - C10M 173/02: not containing mineral or fatty oils - C08G 2125/00: Compositions for processes using internal mould release agents - C08L 2205/02: containing two or more polymers of the same C08L -group - C10M 2207/022: containing at least two hydroxy groups - C10M 2209/1045: used as base material - C10M 2209/1055: used as base material - C10M 2209/1075: used as base material - C10M 2209/109: esterified - C10M 2229/02: Unspecified siloxanes; Silicones - C10N 2020/04: Molecular weight; Molecular weight distribution - C10N 2040/36: Release agents {or mold release agents} - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## 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. ## Claims ### Claim 1 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). ### Claim 2 (depends on 1) The release agent according to claim 1, wherein the polyoxyalkylene glyceryl ether (A) has a number-average molecular weight of 2,000 to 20,000. ### Claim 3 (depends on 1) The release agent according to claim 1, wherein the polyoxyalkylene diol (B) has a number-average molecular weight of 2,000 to 20,000. ### Claim 4 (depends on 1) The release agent according to claim 1, wherein a content of the polyoxyalkylene dial (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A). ### Claim 5 (depends on 2) The release agent according to claim 2, wherein the polyoxyalkylene diol (B) has a number-average molecular weight of 2,000 to 20,000. ### Claim 6 (depends on 5) The release agent according to claim 5, wherein a content of the polyoxyalkylene dial (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A). ### Claim 7 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). ### Claim 8 (depends on 7) The release agent according to claim 7, wherein the polyoxyalkylene glyceryl ether (A) has a number-average molecular weight of 2,000 to 20,000. ### Claim 9 (depends on 7) The release agent according to claim 7, further comprising: a polyoxyalkylene diol (B). ### Claim 10 (depends on 9) The release agent according to claim 9, wherein a content of the polyoxyalkylene dial (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A). ### Claim 11 (depends on 8) The release agent according to claim 8, further comprising: a polyoxyalkylene diol (B). ### Claim 12 (depends on 11) The release agent according to claim 11, wherein a content of the polyoxyalkylene dial (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A). ### Claim 13 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). ### Claim 14 (depends on 13) The release agent according to claim 13, wherein the polyoxyalkylene glyceryl ether (A) has a number-average molecular weight of 2,000 to 20,000. ### Claim 15 (depends on 14) The release agent according to claim 14, wherein a content of the polyoxyalkylene diol (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A). ### Claim 16 (depends on 13) The release agent according to claim 13, wherein a content of the polyoxyalkylene diol (B) is 20 to 500 parts by mass relative to 100 parts by mass of the polyoxyalkylene glyceryl ether (A).