Process for the production of reinforced moldings and the result

Details Process for the production of reinforced moldings and the result Process for the production of reinforced moldings and the result

1993-01-21

1993-09-14

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 51, 264 54, 2643281, 2643286, 2643288, 521 54, 521 99, 521128, 521137, 521112, C08J 932

Patent

active

052446131

ABSTRACT:
It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.

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