Hyperbranched polyol macromolecule, method of making same, and coating composition including same
US6649705B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 7, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jan 7, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/754
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hyperbranched polyester polyol macromolecule, having a plurality of both embedded and exterior hydroxyl groups thereon, may be synthesized in a polymerization reaction having several steps. The hyperbranched polyol includes a central nucleus, a first chain extension, an intermediate substituent and a second chain extension. The central nucleus is a hydrocarbon structure with a plurality of oxygen atoms. The first chain extender is attached to the central nucleus and includes a carboxylic ester group and a plurality of hydroxyl groups. The intermediate substituent is attached to the first chain extender, and is a polyfunctional carboxylic acid or anhydride thereof. The preferred intermediate substituent is a cyclic compound. The second chain extension is attached to the intermediate substituent. The preferred second chain extension includes a glycidyl ester or epoxy. Methods of making a hyperbranched polyester polyol are also disclosed. Coating compositions in which the hyperbranched polyol is reacted with an aminoplast or with an isocyanate are also encompassed by the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.