Highly branched polyesters through one-step polymerization process
US6525170B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Aug 4, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/914
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerization process for producing highly branched polyesters is disclosed comprising reacting functional groups A and B of multi-functional branching monomer reactants of the formula A—L—Bn, where one of A and B represents an epoxide group, the other of A and B represents an acid chloride group, L represents a linking group between A and B, and n is at least 2. In accordance with a specific embodiment of the invention, branched polyesters are obtained which have a number average molecular weight of at least 1000 and a ratio of weight average molecular weight to number average molecular weight of less than 2. The invention provides a process for producing highly branched polyesters in one reaction step. The invention has the capability of making highly branched structures of high molecular weight and low polydispersity and has the advantages of not requiring multi-step reactions and purification. The invention yields highly branched polyesters having a multiplicity of very reactive epoxy or acid chloride or both on the outside surface which can be further converted to other functional groups, including polymerizable groups and initiating groups, which can undergo fu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.