Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1994-09-12
1995-11-28
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
26432817, B29C 4500
Patent
active
054705231
ABSTRACT:
The present invention relates to the use of organic compounds which contain epoxide groups and which are subjected to a heat treatment at 30.degree. to 150.degree. C. in the presence of an alkylating agent, as auxiliary substances to increase the weather resistance of molded plastic parts. These molded parts are produced by the reaction injection molding technique and the process comprises reacting reaction mixtures based on polyioscyanate addition products.
REFERENCES:
patent: 3406140 (1968-10-01), Polestak et al.
patent: 4737564 (1988-04-01), Goel
patent: 4788224 (1988-11-01), Muller et al.
patent: 5021536 (1991-06-01), Muller et al.
patent: 5173559 (1992-12-01), Muller et al.
Becker, W. E. Reaction Injection Molding. New York, Van Nostrand Reinhold Co., 1979. Pp. 5, 59-92.
Gronen Jurgen
Jansen Bernhard
Muller Hanns P.
Bayer Aktiengesellschaft
Brown N. Denise
Gil Joseph C.
Tentoni Leo B.
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