Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1982-09-30
1984-12-25
Lieberman, Paul
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
20415913, 264 83, 2642096, 264347, B29C 2500
Patent
active
044903146
ABSTRACT:
A process for making radiation cured silicone rubber articles is disclosed wherein a hydroxyl-terminated polysilaxane having a molecular weight from about 50,000 to about 2,000,000, optionally modified by mixing with up to 85% of an end-stopped silicone rubber, is mixed with from about 10 to about 70 parts per hundred of rubber of a finely divided silica filler with a particle size in the reinforcing range and other inert fillers as determined by desired final properties; the composition so prepared is formed into the desired shape at room temperature; the article so formed is precured to improve the mechanical properties of the material with which it is made by exposure to ammonia gas, ammonium hydroxide, or to the vapors or solutions of a volatile amine at room temperature; and the precured article is irradiated with high energy electrons or gamma radiation to effect a permanent cure of the material from which the article is formed.
REFERENCES:
patent: 2763609 (1956-09-01), Lewis et al.
patent: 3065158 (1962-11-01), Zack, Jr.
DuPont John G.
Goodwin Paul A.
High Voltage Engineering Corporation
Lieberman Paul
Nields Henry C.
Thompson W.
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