Resin composition

By adding an aluminum pigment with specific particle size characteristics to a polyacetal resin composition, the issues of formaldehyde generation, product appearance, and mold contamination are addressed, resulting in a composition that produces less formaldehyde, has excellent appearance and weather resistance, and suppresses mold contamination.

JP7682028B2Active Publication Date: 2025-05-23ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information

Application Number
JP2021093192
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-06-03
Filing Date
2021-06-02
Publication Date
2025-05-23
Estimated Expiration
2041-06-02

AI Technical Summary

Technical Problem

Existing polyacetal resin compositions fail to adequately suppress formaldehyde generation, maintain product appearance such as glossiness, and prevent mold contamination during molding.

Method used

Incorporating an aluminum pigment with a specific range of particle diameters, including 1 μm or less, and a volume average particle diameter of 3 to 40 μm, into a polyacetal resin composition, along with optional additives like lubricants and formaldehyde inhibitors.

Benefits of technology

The resulting polyacetal resin composition significantly reduces formaldehyde generation, enhances the appearance and weather resistance of molded products, and minimizes mold contamination during the molding process.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a resin composition which generates less formaldehyde, enables production of a molding excellent in appearance and weather resistance and further suppresses mold contamination in molding.SOLUTION: A polyacetal resin composition contains (A) 100 pts.mass of a polyacetal resin, and (B) 0.1-10 pts.mass of an aluminum pigment, in which (B) the aluminum pigment contains 0.1-2.0 mass% of particles having a particle diameter of 1 μm or less with respect to the total amount of (B) the aluminum pigment, and a volume average particle diameter of (B) the aluminum pigment is 3-40 μm.SELECTED DRAWING: None
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Claims

1. (A) 100 parts by mass of a polyacetal resin; (B) 0.1 to 10 parts by mass of an aluminum pigment; the aluminum pigment (B) contains 0.1 to 2.0 mass % of particles having a particle diameter of 1 μm or less, based on a total amount of the aluminum pigment (B), and the aluminum pigment (B) has a volume average particle diameter of 3 to 40 μm.

2. The polyacetal resin composition according to claim 1 , further comprising (C) a lubricant.

3. 3. The polyacetal resin composition according to claim 1, comprising 1 to 4 parts by mass of the aluminum pigment (B) relative to 100 parts by mass of the polyacetal resin (A).

Citation Information

Patent Citations

  • Resin molding

    JP1986159453A

  • Metallic pigment to be incorporated into synthetic resin

    JP1987020574A

  • Polyacetal resin composition

    JP2009155418A

  • Polyacetal resin composition

    JP2010065210A

  • Polyacetal resin composition and molded product

    JP2011140577A