Molding process using room temperature curing silicone...

Details Molding process using room temperature curing silicone... Molding process using room temperature curing silicone...

B - Operations, Transporting

29

C

18/1194

B29C 33/64 (2006.01) B29C 33/34 (2006.01)

Patent

CA 1245029

MOLDING PROCESS USING ROOM TEMPERATURE CURING SILICONE COATINGS TO PROVIDE MULTIPLE RELEASE OF ARTICLES ABSTRACT An improved molding process is provided which comprises treating a mold surface with certain curable silicone compositions to improve the release of molded articles from the mold. The silicone mold release composition is obtained by mixing predominately hydroxyl terminated polydimethylsiloxane, an alkoxysilane such as methyltrimethoxysilane, a metal alkoxide such as tetraalkyltitanate and a non-reactive, volatile solvent. The composition is stable if stored in containers that exclude moisture, but cures when exposed to moisture. Molds with surfaces coated by these compositions provide easy release of many successively molded articles such as high resiliency polyurethane foam cushions for automobiles.

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