| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal-additive mold release agent composition for a hydraulic inorganic material, which is capable of providing an inorganic unhardened body formed from the hydraulic inorganic material with excellent releasability from a frame mold and also has good capabilities of preventing raw material deposition on the frame mold from being caused and preventing fuzzing on the surface of the inorganic unhardened body from being caused. SOLUTION: This release agent composition contains at least one kind of polyethylene which is selected from oxidized form polyethylene and acid- modified form polyethylene and has a viscosity-average molecular weight of 500-10,000, and also an emulsifying agent for emulsifying the polyethylene and is water-soluble or water-dispersible. The composition is mixed into a hydraulic inorganic material, in an amount sufficient to provide a 0.3-7 wt.% ratio of the polyethylene to the total solid content of the hydraulic inorganic material.
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