Resin composition for injection molding and injection-molded article
AssigneeKaneka Corporation
InventorYoshiaki Matsuoka
Life of this patent
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Abstract
A resin composition for injection molding contains a poly(3-hydroxyalkanoate) resin. The poly(3-hydroxyalkanoate) resin includes at least one copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units. The average content of the 3-hydroxybutyrate units in the poly(3-hydroxyalkanoate) resin is from 92 to 99 mol %. The polystyrene-equivalent weight-average molecular weight of the poly(3-hydroxyalkanoate) resin, as measured by gel permeation chromatography using a chloroform solvent, is from 21×104 to 38×104. In a weight molecular weight distribution of the poly(3-hydroxyalkanoate) resin, the proportion of a component having a weight molecular weight of 20×104 or less is from 35 to 60 wt %.
Claims20
A resin composition for injection molding, comprising a poly(3-hydroxyalkanoate) resin, wherein
- the poly(3-hydroxyalkanoate) resin consists of at least one copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units, and optionally a homopolymer of 3-hydroxybutyrate,
- an average content of the 3-hydroxybutyrate units in the poly(3-hydroxyalkanoate) resin is from 92 to 99 mol %,
- a polystyrene-equivalent weight-average molecular weight of the poly(3-hydroxyalkanoate) resin, as measured by gel permeation chromatography using a chloroform solvent, is from 21×104 to 38×104, and
- in a weight molecular weight distribution of the poly(3-hydroxyalkanoate) resin, a proportion of a poly(3-hydroxyalkanoate) having a weight molecular weight of 20×104 or less is from 35 to 60 wt %.
Dependencies are inferred from the claim text.