Two-component mold release system and method
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United States of America Patent
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Jul 22, 1986
Grant Date -
N/A
app pub date -
Apr 25, 1983
filing date -
Apr 25, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-stage system can provide a water-soluble releasing interface which permits a plurality of cycles of the mold between applications with such reaction-injection molding materials as reinforced urethane. The two-coat release system provides on the mold surface a base coat, including a polymer release agent with groups capable of bonding to the mold surface (e.g., a carboxy-terminated silicone) and a bonding or cross-linking agent (e.g., tetraisopropyltitanate), which reacts with and cross links the polymer and provides bonding with the mold surface and for soap-like materials, and a top coat, which is a water-soluble soap-like material (e.g., a water-soluble metallic salt of long-chain fatty acid). Such a system can be particularly adapted for use with urethane RIM materials.
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