Preparation of multiply-branched aliphatic-aromatic polyesters and multiply-branched aliphatic-aromatic polyesters
US5227462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multiply-branched aliphatic-aromatic polyester and a method for producing that polymer. The method comprises condensing a branching reactant represented by the general formula ##STR1## Each j is 1 or 2, each Ar is independently selected from the group consisting of aromatic and heteroaromatic moieties having a total of ring carbons and heteroatoms of from 5 to about 20, each R.sup.1 is a linking group independently selected from alkyl having from 1 to about 6 carbons, fluoroalkyl having from 1 to about 6 carbons, --O--, --S--, --C.tbd.C--, and ##STR2## Z.sup.1 is selected from the group consisting of hydroxyl and --OSi(CH.sub.3).sub.3, and each Z.sup.2 is independently selected from groups having the structural formula ##STR3## wherein each R.sup.2 is independently selected from the group consisting of hydroxy, chloro, bromo, monovalent alkoxide having from 1 to about 6 carbons, and --O--(CH.sub.2).sub.g --OH, wherein g is an integer from 1 to 3, or Z.sup.1 has the structural formula ##STR4## wherein each R.sup.2 is independently selected from the group consisting of hydroxy, chloro, bromo, monovalent alkoxide having from 1 to about 6 carbons, and --O--(CH.sub.2).sub.g --OH, wher…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.