Flexible articles formed from polyurethanes by RIM processes

Details Flexible articles formed from polyurethanes by RIM processes Flexible articles formed from polyurethanes by RIM processes

1990-03-30

1991-11-05

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264240, 528 85, B29C 4546

Patent

active

050630172

ABSTRACT:
A wide variety of products are formed by compression molding of silicone materials. Although such articles are used in numerous applications, compression molding is expensive and exudation of unreacted monomers and oligomers tend to cause electrical contact failures. By employing specific polyurethanes formed from polyols and isocyanates, it is possible to form articles by reaction injection molding. This process is substantially cheaper than compression molding and yet the same properties obtainable with silicones are attained.

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Woods, Polyurethane, Modern Plastics Enc.; p. 122, McGraw-Hill Inc., 1988.
F. Melvin Sweeney in Introduction to Reaction Injection Molding, Technomic Publishing Company, 1979.

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