Vinyl chloride resin composition for powder molding
US5994439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a vinyl chloride resin composition for powder molding comprising: PA1 (1) 100 parts by weight of a vinyl chloride resin powder having an average polymerization degree p of 600 to 3000 and an internal pore volume of 0.20 ml/g or more, PA1 (2) 80 to 150 parts by weight of a trimellitic ester having an alkyl group with a principal chain having an average carbon number n of 6 to 9, and PA1 (3) 5 to 25 parts by weight of a fine vinyl chloride resin having an average polymerization degree q of 400 to 1300 and a primary grain size distribution of two modes in which a smaller mode falls in a grain size range of 0.1 to 0.4 .mu.m and a larger mode falls in a grain size range of 0.9 to 1.4 .mu.m, wherein the parts by weight L of the trimellitic ester shown in (2), p and n each described above have the relation satisfying an equation (I): EQU 5<[{(n-8).times.5+L}/p].times.100<12 (I) This vinyl chloride resin composition is improved in a coldproof property and a thermal degradation resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.