Isobutylene copolymers, method for making isobutylene copolymers and isobutylene copolymer products
US11326004B2 · kind B2 · utility
1Cited by
23References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2018 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Oct 12, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Isobutylene copolymer includes repeat units derived from isobutylene and one or more comonomers selected from isoprene, butadiene, cyclopentadiene, dicyclopentadiene, limonene, substituted styrenes, and C4 to C10 dienes other than isoprene, butadiene, limonene, cyclopentadiene, or dicyclopentadiene, wherein the molar ratio of isobutylene derived repeat units to the comonomer derived repeat units is from 75:1 to 1.5:1. The copolymers have a molecular weight, Mn, of from 200 to 20,000 Daltons and typically have a high double bond content and a high vinylidene double bond content when diene monomers are utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.