Polyacetal resin composition
US7772310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2009 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L59/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a polyacetal resin composition comprising (I) a polyacetal resin; and per 100 parts by weight thereof, (II) more than 5 parts by weight but less than 100 parts by weight of calcium carbonate, wherein the calcium carbonate has an average particle diameter of 0.1 to less than 1.5 μm and an average aspect ratio (L/D) which is a ratio of average major axis (L) of particles to average minor axis (D) of particles (D) of 3 or less; (III) 0.005 to 10 parts by weight of an organic acid; and (IV) 0 to less than 0.05 part by weight of a fatty acid ester, wherein the amount of Na relative to Ca is 250 ppm or less while the amount of Sr relative to Ca is 500 to 2500 ppm. The resin composition of the invention is excellent in a balance of thermal stability and mechanical properties, such as rigidity and toughness, also excellent in anti-creep life, fatigue resistance and acid resistance, so that it can be suitably used in various fields, such as automobile, electrical/electronic and other industries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.