Reaction injection molding method

Details Reaction injection molding method Reaction injection molding method

1983-09-16

1985-06-18

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432813, 26432817, B29F 100

Patent

active

045240442

ABSTRACT:
A molded article is formed by a reaction injection molding method wherein a starting material, e.g., an .omega.-lactam, is injected into a mold, the inner pressure of which is maintained at 0.5 to 20 kg/cm.sup.2 .multidot.G with an inert gas; and the inner pressure of the mold is maintained at a level higher than the pressure increased by injection of the starting material until the polymerization molding of the starting material is completed.

REFERENCES:
patent: 3268635 (1966-08-01), Kraus et al.
patent: 4107258 (1978-08-01), Angell, Jr. et al.
patent: 4229395 (1980-10-01), Nagumo et al.
The Development of Non-Urethane Materials for the Rim Process, R. Kubiak and R. Harper, 45th Annual Tech. Conference, Society of Plastics Ind. Inc., 1980, pp. 1-7.
Ionically Polymerized Lactams (Polyamides), Dr. Kurt Schneider, Kunststoffe, vol. 55, May 1965, pp. 315-316.

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