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US 11,028,263 B2Granted
Polyoxymethylene resin composition
AssigneeKorea Engineering Plastics Co., Ltd.
InventorsSeung Hwan Joo, Chang Ho Lee, Kwan Yong Choi
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Abstract
A polyoxymethylene resin composition including a polyoxymethylene homopolymer, a polyhydric alcohol, and a calcium phosphate compound, which has excellent thermal stability and a low weight-reduction rate and thus can be favorably used in various industrial fields and used as an engineering plastic in fields of machine parts and the like.
Claims8
A polyoxymethylene resin composition comprising:
- a polyoxymethylene homopolymer, a polyhydric alcohol containing three or more hydroxy groups in a molecule in an amount of 0.001 to 1 part by weight based on 100 parts by weight of the polyoxymethylene homopolymer;
- a calcium phosphate compound in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the polyoxymethylene homopolymer;
- and
- an ethylene urea in an amount of 0.001 to 1 part by weight based on 100 parts by weight of the polyoxymethylene homopolymer;
- wherein the polyoxymethylene homopolymer is obtained by polymerizing formaldehyde or trioxane in the presence of a polymerization catalyst and then adding a melamine-based polymerization terminator,
- wherein the polyoxymethylene resin composition has a weight-reduction rate of 9% or less and a CH2O generation amount of 100 ppm or less.
3 more elements
Dependencies are inferred from the claim text.