VINYL CHLORIDE RESIN COMPOSITION FOR POWDER MOLDING, MOLDED OBJECT OBTAINED THEREFROM, LAMINATE, VEHICLE INTERIOR MATERIAL, AND METHOD FOR PRODUCING VINYL CHLORIDE RESIN COMPOSITION FOR POWDER MOLDING

• US 20100272984A1
• Filed: 02/03/2009
• Published: 10/28/2010
• Est. Priority Date: 02/29/2008
• Status: Active Application

• Current Assignee: ZEON Corporation
• Original Assignee: ZEON Corporation
• Inventors: Yanai, Koichi, Hada, Hiroyuki
• Application Number:
  US12/746,126
• Publication Number:
  US 20100272984A1
• Time in Patent Office: Days
• US Class Current: 428/319.300
• CPC Class Codes: C08J 2327/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08J 3/124 Treatment for improving the free-flowing characteristics
• CPC Class Codes: C08J 3/18 Plasticising macromolecular compounds plasticisers C08K
• CPC Class Codes: C08J 3/203 Solid polymers with solid and/or liquid additives
• CPC Class Codes: C08K 5/12 of cyclic polycarboxylic acids
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: Y10T 428/249991 Synthetic resin or natural rubbers

Abstract

A vinyl chloride resin composition for powder molding of the present invention includes: 100 parts by mass of vinyl chloride resin particles made of vinyl chloride resin whose average degree of polymerization is 1500 or more, the vinyl chloride resin particles having an average particle size ranging from 50 to 500 μm; and 110 to 150 parts by mass of a particular trimellitate plasticizer. The vinyl chloride resin composition has excellent powder flowability and results in a molded object having excellent heat aging resistance and low-temperature resistance.

Claims

1. A vinyl chloride resin composition for powder molding, comprising:

100 parts by mass of vinyl chloride resin particles made of vinyl chloride resin whose average degree of polymerization is 1500 or more, the vinyl chloride resin particles having an average particle size ranging from 50 to 500 μ

m; and

110 to 150 parts by mass of a trimellitate plasticizer represented by general formula (1)

2. The vinyl chloride resin composition for powder molding as set forth in claim 1, comprising:

100 parts by mass of vinyl chloride resin particles made of vinyl chloride resin whose average degree of polymerization is 1500 or more, the vinyl chloride resin particles having an average particle size ranging from 50 to 500 μ

m; and

110 to 150 parts by mass of a trimellitate plasticizer represented by general formula (1) wherein R₁ to R₃ represent an alkyl group and may be identical with each other or different from

3. The vinyl chloride resin composition for powder molding as set forth in claim 1, wherein the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin particles ranges from 1500 to 3000.

4. The vinyl chloride resin composition for powder molding as set forth in claim 1, wherein the average particle size of the vinyl chloride resin particles ranges from 50 to 250 μ

m.

5. The vinyl chloride resin composition for powder molding as set forth in claim 1, wherein the average particle size of the vinyl chloride resin particles ranges from 100 to 200 μ

m.

6. The vinyl chloride resin composition for powder molding as set forth in claim 1, further comprising 1 to 30 parts by mass of a dusting agent with respect to 100 parts by mass of the vinyl chloride resin particles, the dusting agent being made of vinyl chloride resin fine particles of 0.1 to 10 in average particle size.

7. The vinyl chloride resin composition for powder molding as set forth in claim 6, wherein an average degree of polymerization of vinyl chloride resin constituting the vinyl chloride resin fine particles ranges from 500 to 2000.

8. The vinyl chloride resin composition for powder molding as set forth in claim 6, wherein an average degree of polymerization of vinyl chloride resin constituting the vinyl chloride resin particles ranges from 800 to 1500.

9. The vinyl chloride resin composition for powder molding as set forth in claim 6, wherein the dusting agent made of the vinyl chloride resin fine particles is in a range of 10 to 25 parts by mass with respect to 100 parts by mass of the vinyl chloride resin particles.

10. A vinyl chloride resin molded object, obtained by powder molding the vinyl chloride resin composition for powder molding as set forth in claim 1.

11. A laminate, including a surface of the vinyl chloride resin molded object as set forth in claim 10 and polyurethane foam.

12. A vehicle interior material, having a surface made of the vinyl chloride resin molded object as set forth in claim 10.

13. A method for producing the vinyl chloride resin composition for powder molding as set forth in claim 1, comprising the step of mixing (i) 100 parts by mass of vinyl chloride resin particles made of vinyl chloride resin whose average degree of polymerization is 1500 or more, the vinyl chloride resin particles having an average particle size ranging from 50 to 500 μ

m, with (ii) 110 to 150 parts by mass of a trimellitate plasticizer represented by general formula (1)

14. The method for producing the vinyl chloride resin composition for powder molding as set forth in claim 13, wherein a dusting agent made of vinyl chloride resin fine particles of 0.1 to 10 μ

m in average particle size is mixed in such a manner that the dusting agent is in a range of 1 to 30 parts by mass with respect to 100 parts by mass of the vinyl chloride resin particles.

15. The method for producing the vinyl chloride resin composition for powder molding as set forth in claim 13, wherein mixing is performed by dry blending.