Process for polymer production
US4786690A · kind A · utility
3Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process is provided for the production of a polymer of reduced molecular weight by subjecting, in bulk form, a halogenated butyl polymer having at least 75 percent of the unsaturation in the EXO methylene configuration to mastication in an extruder while exposing the masticated polymer to an atmosphere containing ozone. Such reduced molecular weight polymers have an M.sub.n of from about 10,000 to about 40,000 and may be used in caulks and sealants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.