Mold release agent for urethane molding


PURPOSE: To prevent occurrence of the bubbles or abnormal foaming in a product, while generated moisture is removed in the early stages by mixing an addition agent which has azeotropic effect with water and contains hydrophilic group, in a mold release agent composed of main agent and volatile solvent. CONSTITUTION: A mold release agent composed of main agent and volatile solvent is the mold release agent for urethane molding having at least azeotropic effect with water and containing addition agent with hydrophilic group. As the main agent paraffin-type silicone-type, fluorine resin-type and polyvinyl alcohol-type, etc. are used. As the typical volatile solvent, cyclohexane, mineral, toluene xylene, etc. are used. As the addition agent, for instance, a lower ketone with about 120 or more molecular weight suck as aceton and methyl ethyl ketone, and lower alcohol, benzene and chloroform, etc. with about 120 or less molecular weight such as ethanol, methanol and isopropanol, etc. are used. The moisture generated in the vaporization of the solvent is mixed with the addition agent, and the boiling points of both materials are lowered, thereby accelerating the vaporization of moisture. The bubble occurrence in the product which is injection molded or cast molded is prevented. COPYRIGHT: (C)1988,JPO&Japio




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Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    JP-S60190309-ASeptember 27, 1985Nippon Mektron LtdReleasing agent
    JP-S60193615-AOctober 02, 1985Nippon Mektron LtdMold releasing agent
    JP-S612514-AJanuary 08, 1986Daikin Ind LtdReleaser
    JP-S62259814-ANovember 12, 1987Daikin Ind LtdReleasing agent
    JP-S62275713-ANovember 30, 1987Daikin Ind LtdReleasant

NO-Patent Citations (0)


Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-103640130-AMarch 19, 2014江南大学Mold release agent and application of mold release agent in production of paraffin wax mold product