Cast polymerization process with improved mold release

Details Cast polymerization process with improved mold release Cast polymerization process with improved mold release

1974-03-20

1976-01-27

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

106 3822, 264 1, 264331, 264341, B29C 104

Patent

active

039352927

ABSTRACT:
A process for producing cast polymer is carried out by using a mold treated by the following steps: coating the glass surface of the mold with polysiloxane; heating the coated glass surface at a temperature in the range of from more than about 150.degree. C. to a temperature at which the coated polysiloxane is not hardened yet; and wiping the coated surface of baked polysiloxane. Not only is easy mold release attained, but also repeated use of the same mold becomes possible.

REFERENCES:
patent: 2426402 (1947-08-01), Magrane et al.
patent: 2593827 (1952-04-01), Anspon et al.
patent: 2817878 (1957-12-01), Anspon
patent: 3492394 (1970-01-01), Heine
patent: 3755262 (1973-08-01), Slagel

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