POLYACETAL RESIN COMPOSITION

• Main Authors: OKA, MIKIO, HATA, TADASHIGE
• Format: Patent
• Language: English; French; German
• Published: 15.07.1998
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

Disclosed is a polyacetal resin composition comprising a terminal-stabilized polyacetal resin, and at least one aliphatic carboxylic acid metal salt added to the terminal-stabilized polyacetal resin, the at least one aliphatic carboxylic acid metal salt having occluded therein at least one metal compound selected from the group consisting of a metal hydroxide and a metal chloride, and having attached to a surface thereof at least one metal compound selected from the group consisting of a metal hydroxide and a metal chloride, wherein the at least one occluded metal compound and the at least one surface-attached metal compound are, respectively, present in an amount of from 1 to 300 ppm by weight and in an amount of from 0 to 20 ppm by weight, each based on the total weight of the at least one aliphatic carboxylic acid metal salt, the at least one occluded metal compound and the at least one surface-attached metal compound. The polyacetal resin composition of the present invention has not only excellent thermal aging resistance, but also excellent aging discoloration resistance and excellent anti-mold deposit properties.