Clarity of low density polyethylene compositions containing anti-block agents by addition of polyethylene glycol
US4629749A · kind A · utility
1Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1985 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jul 24, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is disclosed for improving the clarity of polyethylene film containing silica or diatomaceous earth as an anti-blocking agent. The method comprises treating the anti-blocking agent with polyethylene glycol such that sufficient polyethylene glycol is deposited on said anti-blocking agents so that the weight ratio of said polyethylene glycol to said anti-blocking agent is at least about 1:30. Next, the treated anti-blocking agent is added to the polyethylene resin and this blend is formed into a film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.