Process for the production of composite bodies

Details Process for the production of composite bodies Process for the production of composite bodies

1992-09-10

1994-04-05

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 451, 2642711, 264300, 2643286, B29C 6722

Patent

active

053002644

ABSTRACT:
A process for the production of composite bodies consisting of a polyurethane core and a polyurethane covering, with the core being positioned inside a mold so that an average distance of at least 0.5 mm exists between the surface of the core and the internal wall of the mold. The gap between the core and the internal wall of the mold is filled with a reaction mixture composed of a) a polyisocyanate component, and b) a polyol component. The polyol component b) must have a weight ratio of carbon to oxygen of at least 2.5:1.

REFERENCES:
patent: 3954926 (1976-05-01), Pahl et al.
patent: 4204051 (1980-05-01), Wellner et al.
patent: 4446293 (1984-05-01), Konig et al.
patent: 4539166 (1985-09-01), Richartz et al.
patent: 4571417 (1986-02-01), Thoma et al.
patent: 4956240 (1990-09-01), Williams et al.

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