Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1980-05-14
1982-02-09
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
264236, 264314, 264333, 425389, 425405R, 425417, 425DIG14, B28B 2120, B28B 2194, B28B 2136
Patent
active
043149570
ABSTRACT:
A polymer-impregnated concrete product is obtained by placing a concrete mix in a frame capable of withstanding high temperature and high pressure in such a manner as to form therein a hollow portion, molding the concrete mix to obtain a concrete article containing a hollow portion therein, causing the concrete article as held in a tightly closed state in the frame to be cured by application of heat, subjecting the concrete article, as retained in the frame, to treatments for drying and deaeration, then supplying a monomer preparation to the hollow portion of the concrete article, applying pressure to bear upon the concrete article thereby causing the monomer preparation to be diffused into the fine voids in the concrete article, and heating the concrete article in situ thereby allowing the diffused monomer to be polymerized.
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Anderson Philip
Kelman Kurt
Ozawa Concrete Industry Co., Ltd.
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