Melt-stable recyclable carbon black-laden polyacetal resin moldi

Details Melt-stable recyclable carbon black-laden polyacetal resin moldi Melt-stable recyclable carbon black-laden polyacetal resin moldi

1992-01-29

1993-05-18

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523204, 523210, 523215, 524291, 524495, 524496, 524493, C08K 1306

Patent

active

052122220

ABSTRACT:
Melt-stable polyacetal molding compositions include a polyacetal base resin, and a carbon black-impregnated ethylenic carrier polymer in amounts to yield between about 0.1 to 30 parts by weight of carbon black. The ethylenic carrier polymer is preferably present in an amount between 0.3 to 8 times by weight of the carbon black impregnated therewithin. The compositions of this invention further contain a co-stabilization package which includes a first stabilizer selected from nitrogen-containing compounds, fatty acid ester compounds, and metal-containing compounds which contain a hydroxide, an inorganic acid salt or a carboxylic acid salt of an alkali metal or an alkaline earth metal, and a second stabilizer which is a hindered phenolic compound. Preferably, the first and second stabilizers are each used in amounts between 0.01 to 5 parts by weight, based on 100 parts by weight of the polyacetal base resin.

REFERENCES:
patent: 3442850 (1969-05-01), O'Brien et al.
patent: 3484399 (1969-12-01), Kakos
patent: 4379871 (1983-04-01), Werle et al.
patent: 4391741 (1983-07-01), Masamoto et al.
patent: 4564647 (1986-01-01), Hayashi et al.
patent: 4670508 (1987-06-01), Ohdaira et al.
patent: 5086095 (1992-02-01), Katsumata et al.
World Patents Index, Wee 2579, Derwent Publications Ltd., London, GB; AN 76-87888X & JP-8-54 013 269 (Asahi Chem Ind. KK) May 29, 1979.

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