Method for the synthesis of environmentally degradable block copolymers
US5633342A · kind A · utility
22Cited by
17References
51Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 27, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/823
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is provided for the synthesis of environmentally degradable block copolymers which includes the sequential polymerization of polymer-forming materials in the presence of one or more polymerization reaction accelerants and catalysts. The accelerants are a class of hydrogen-labile compounds which act as polymerization initiators and accelerate the polymerization rate significantly. The environmentally degradable block copolymers produced include those comprising segments of polymers of alkylene oxides, trimethylene carbonates, lactones and cyclic esters of hydroxycarboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.