Method of making pore-free molding with thick section

Details Method of making pore-free molding with thick section Method of making pore-free molding with thick section

1990-03-12

1992-04-07

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264237, 264327, 2643282, 2643286, 26432814, 26432816, 26432817, 26432818, 26433112, 26433113, 26433117, 525290, 526283, B29C 4578, C08F 3200

Patent

active

051025892

ABSTRACT:
A method of producing a pore-free polynorbornene article having thick-walled portions is provided. The method comprises providing a monomer charge containing at least one norbornene monomer having a tricyclic or higher cyclic structure; introducing the monomer charge into a mold at a temperature greater than the inside mold temperature; polymerizing the monomer charge under pressure via a ring-opening catalyst system; cooling the molded article; and removing the molded article from the mold.

REFERENCES:
patent: 2376655 (1945-05-01), Brotz
patent: 2889441 (1959-06-01), McMinn et al.
patent: 4309379 (1982-01-01), Dannels et al.
patent: 4380617 (1983-04-01), Minchak et al.
patent: 4426502 (1984-01-01), Minchak
patent: 4469809 (1984-09-01), Klosiewicz
patent: 4696985 (1987-09-01), Martin
patent: 4952348 (1990-08-01), Ishimaru et al.

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