Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1984-04-13
1989-08-15
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
264174, 26421124, 264236, 264347, 264349, 425 71, 425113, 425206, 425207, 425208, 4253823, B29C 4750
Patent
active
048572500
ABSTRACT:
Method of and apparatus for making a shaped crosslinked extruded polymeric product by extruding compacted, melted polymer, e.g., polyethylene, into a mixer formed on or fitted to the discharge end of an extruder, injecting proportionate amounts of a mixture of compounding ingredients including olefinically unsaturated hydrolyzable silane, free-radical generator and, preferably, a silanol condensation catalyst into the compacted, melted polymer. The polymer and compounding ingredients are blended in the mixer until the silane is grafted to said polymer, and the resulting grafted polymer mixed with the silanol condensation catalyst is extruded thruugh a die to form the product of the required final shape. The resulting product is subjected to the action of H.sub.2 O until the grafted polymer is crosslinked.
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Gale George M.
Sorio Aldo A.
Thurlow Jeffery
Trautlein Eugene C.
Union Carbide Corporation
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