Heat-resistant liner-provided vessel closure and process for preparation thereof
US5060818A · kind A · utility
19Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1991 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Feb 11, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L91/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a vessel closure having a liner formed from a composition comprising (i) a hydrogenated styrene/butadiene block copolymer having a melt index smaller than 0.1 g/10 min as measured at a temperature of 200.degree. C. under a load of 5 kg, (ii) liquid paraffin and (iii) a propylene resin. In this liner, the compression permanent strain and permanent elongation under high temperature conditions are extremely small, and therefore, even if a divergence is produced between the liner and the mouth portion of a vessel by thermal deformation or thermal shrinkage, a good sealing property can be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.