Vinyl chloride resin composition for powder molding, vinyl chloride resin molded article and laminate

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

100 parts by mass of (a) vinyl chloride resin particles having an average polymerization degree of 2300 to 4100; and

100 parts by mass to 200 parts by mass of (b) a plasticizer containing a trimellitate plasticizer and a pyromellitate plasticizer, wherein the plasticizer (b) contains 65 parts by mass to 165 parts by mass of the trimellitate plasticizer, and 35 parts by mass to 135 parts by mass of the pyromellitate plasticizer, provided that a total amount of the plasticizer (b) remains in a range of 100 to 200 parts by mass,

wherein a plasticizer other than the trimellitate plasticizer and the pyromellitate plasticizer is contained in the plasticizer (b) in a total amount of not more than 3.6% by mass.

2. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein (a) the vinyl chloride resin particles have an average polymerization degree of 3100 to 4100.

3. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein (a) the vinyl chloride resin particles having the average polymerization degree of 2300 to 4100 have an average particle size of 50 μm to 500 μm.

4. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein (b) the plasticizer contains epoxidized soybean oil.

5. The vinyl chloride resin composition for powder molding as set forth in claim 1 , further comprising 0.1 parts by mass to 3 parts by mass of saturated fatty acid having a hydroxyl group and/or metallic soap with respect to 100 parts by mass of (a) the vinyl chloride resin particles having the average polymerization degree of 2300 to 4100.

6. The vinyl chloride resin composition for powder molding as set forth in claim 1 , further comprising 0.5 part by mass to 10 parts by mass of hydrotalcite with respect to 100 parts by mass of (a) the vinyl chloride resin particles having the average polymerization degree of 2300 to 4100.

7. The vinyl chloride resin composition for powder molding as set forth in claim 1 , further comprising 0.1 part by mass to 5 parts by mass of zeolite with respect to 100 parts by mass of (a) the vinyl chloride resin particles having the average polymerization degree of 2300 to 4100.

8. The vinyl chloride resin composition for powder molding as set forth in claim 1 , further comprising 0.1 part by mass to 5 parts by mass of a β-diketone with respect to 100 parts by mass of (a) the vinyl chloride resin particle having the average polymerization degree of 2300 to 4100.

9. The vinyl chloride resin composition for powder molding as set forth in claim 1 , further comprising not more than 35 parts by mass of a dusting agent with respect to 100 parts by mass of (a) the vinyl chloride resin particles having the average polymerization degree of 2300 to 4100.

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

11. An automobile instrument panel skin comprising the vinyl chloride resin molded article as set forth in claim 10 .

12. A laminate in which a polyurethane foam molded article and the vinyl chloride resin molded article as set forth in claim 10 are stacked.

13. An automobile instrument panel comprising the laminate as set forth in claim 12 .

14. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein: the plasticizer (b) contains 65 parts by mass to 160 parts by mass of the trimellitate plasticizer, provided that the total amount of the (b) plasticizer remains in a range of 100 to 200 parts by mass.

15. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein the plasticizer other than the trimellitate plasticizer and the pyromellitate plasticizer is contained in the plasticizer (b) in an amount of not more than 5% by mass.

16. The vinyl chloride resin composition for powder molding as set forth in claim 1 , wherein the plasticizer other than the trimellitate plasticizer and the pyromellitate plasticizer is contained in the plasticizer (b) in an amount of not less than 1% and not more than 3.6% by mass.

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

100 parts by mass of (a) vinyl chloride resin particles having an average polymerization degree of 2300 to 4100; and

100 parts by mass to 200 parts by mass of (b) a plasticizer containing a trimellitate plasticizer and a pyromellitate plasticizer, wherein the plasticizer (b) contains 65 parts by mass to 165 parts by mass of the trimellitate plasticizer, and 35 parts by mass to 135 parts by mass of the pyromellitate plasticizer, provided that a total amount of the plasticizer (b) remains in a range of 100 to 200 parts by mass,

wherein a plasticizer other than the trimellitate plasticizer and the pyromellitate plasticizer is contained in the plasticizer (b) in a total amount of not more than 10% by mass,

wherein the pyromellitate plasticizer is a pyromellitic acid tetra alkyl ester having 8 carbons.