Rim method of molding thermoplastic resin

Details Rim method of molding thermoplastic resin Rim method of molding thermoplastic resin

1993-11-19

1996-05-07

Acquah, Samuel A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Separately introducing reacting materials into mold

528220, 528222, 528224, 528310, 528361, 528401, 525420, 524701, 524730, 524755, 524777, 524788, 524795, 264299, 2643281, 2643288, 26433111, 264540, C08G 6916, B29C 6900

Patent

active

055143229

ABSTRACT:
An RIM method of thermoplastic resin comprises a process for preparing materials in which one compound (i) is mixed with a material for thermoplastic resin to prepare one mixture (I), and the other compound (ii) is mixed with a material for thermoplastic resin to prepare the other mixture (II), each of two compounds (i) and (ii) being inactive to the material for thermoplastic resin but producing a high-active anionic polymerization catalyst by their reaction, a process for polymerization in which the mixture (I) and the mixture (II) are mixed, injected into a mold, and polymerized by the anionic polymerization catalyst, an ejecting process in which a solidified thermoplastic resin molded body is ejected from the mold. Therefore, a polymerization reaction cannot be started before the material for thermoplastic resin is injected into the mold, and it begins soon after the material for thermoplastic resin is injected into the mold.

REFERENCES:
patent: 4778875 (1988-10-01), Stewart
patent: 4853459 (1989-08-01), Stewart
"Fabrication Of Thermoplastic Matrix Structural Composites By Resin Transfer Molding Of Cyclic Bisphenol-A Polycarbonate Oligomers", Salem et al., Sampe Journal, vol. 27, No. 1, pp. 1 & 17-22, Jan./Feb. 1991.

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