External lubricant and stabilizer compositions for rigid vinyl polymers
US5426144A · kind A · utility
3Cited by
9References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Aug 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides an external lubricant composition for lead stabilized vinyl polymer. The external lubricant functions as both an external lubricant and a processing aid by speeding fusion and thus, obviates the need for a separate processing aid. The external lubricant comprises an effective amount for lubricating vinyl polymer of polyethylene having a Brookfield viscosity at a temperature of 150.degree. C. of between about 1000 and about 100000 centipoises and an acid number as determined by standardized titration of KOH of between about 1 and about 40.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.