Vinyl chloride resin composition containing polymeric processing aid
US4206292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1979 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Mar 7, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L27/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A vinyl chloride resin composition having surface smoothness comprises: PA1 (1) 100 parts of vinyl chloride polymer; and PA1 (2) 0.1 to 30 parts of a polymer processing aid comprising: PA2 (A) 10 to 100 parts of a copolymer comprising 20 to 99% of an alkyl methacrylate, 1 to 70% of a dialkyl itaconate, and 0 to 60% of a monomer copolymerizable therewith; and PA2 (B) 0 to 90 parts of a copolymer comprising 80 to 100% of an alkyl methacrylate, and 0 to 20% of a monomer copolymerizable therewith, the sum of the quantities of the copolymers (A) and (B) producing 100 parts of the polymer processing aid, all quantities expressed in parts and percentages being by weight. This vinyl chloride resin composition comprising a novel polymer processing aid not only shows an increased gelation rate, yields less ungelled particles and possesses excellent processability such as an increased elongation at a high temperature, but particularly affords a formed product of notably improved surface smoothness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.