Vesicular film and composition with phenoxy resin matrix
US4451550A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Jul 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/621
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel, coatable, highly long-chain branched, ungelled, most preferably endblocked, non-linear phenoxy resins of random structure devoid of regularly recurring units, with the average distance between the branch sites thereof being essentially of the same order of magnitude as the average branch length, such resins advantageously comprising the copolymerization product of: PA1 (i) at least one dihydric phenol, e.g., sulfonyl diphenol; PA1 (ii) an epoxy comonomer having two epoxy functional groups, e.g., resorcinol diglycidyl ether; PA1 (iii) a branching agent comprising an epoxy or phenolic compound having a functionality greater than 2, and preferably at least 3, wherein the amount of branching agent is sufficient to provide at least 10 mole percent branch sites in the polymer resin, and, most preferably; PA1 (iv) a monofunctional phenol or epoxide as an endblocker compound. The branched phenoxy resins are well adapted as matrices for enhanced film speed vesicular films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.