EP0247765A2
Expired / Lapsed
EP
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Polyacetal composition and method of preparation thereof
Assignee: Polyplastics Co Ltd
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Filing: 1987-05-15
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Granted: —
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Expires: 2007-05-15
Abstract
Abstract A polyacetal resin composition contains 0.1-30% by weight of one or two or more members selected from among carbonaceous materials including carbon black, carbon fiber and graphite and 0.0005-2% by weight of one or two or more members selected from among alkali metal compounds and alkaline earth metal compounds in proportion to the total composition.
Inventors
- 👤 Susumu Okushiro
- 👤 Eitaro Ikegami
- 👤 Seiichi Higashiyama
- 👤 Hiroyuki Miyaji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 07:02
CPC Classifications
C; C08; C08L; C08L59/00; C08K; C08K3/00; C08K3/32; C08K3/02; C08K3/04; C08K3/10; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08K7/00; C08K7/02; C08K7/04; C08K7/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
-1- A polyacetal composition which comprises 68 to 99.8995 weight percent of a polyacetal, 0.1 to 30 weight percent of a carbon material selected from carbon black, carbon fibers and graphite and 0.0005 to 2 weight percent of a compound of an alkali metal or an alkaline earth metal.
Claim 2
Dependent Claim
22 words
-2- A composition as claimed in Claim 1, in which said compound is a carbonate, a phosphate, a hydroxide or an oxide.
Claim 3
Dependent Claim
17 words
-3- A composition as claimed in Claim 1, in which said compound is an alkali metal carbonate.
Claim 4
Dependent Claim
79 words
-4- A process for preparing a polyacetal composition, which comprises the steps of blending 0.0005 to 2 weight percent, based on the resulting composition, of a compound of an alkali metal or an alkaline earth metal with a polyacetal and then melting and blending, with 0.1 to 30 weight percent, based on the resulting composition, of a carbon material selected from carbon black, carbon fibers and graphite, the above obtained mixture, before the decomposition of the polyacetal has started.
References Cited (Backward Citations)
No citation records indexed.
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