Scrap rim polyurethane modified extender polyols
US4439546A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1983 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Aug 5, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mixtures of aromatic polyols containing ester functionalities suitable for use as polyol extenders in polyurethane foams prepared by reacting dibasic acid residues with an alkylene glycol residue, the reaction product of which is reacted with recycled polyethylene terephthalate into which scrap RIM is dissolved, are described. Scrap RIM is recycled reaction injection molded polyurethane material which has been chopped or pulverized. From about 10 to 50 wt. % of the resulting modified extender polyol mixture may be scrap RIM. Surprisingly, the process is non-catalytic. These novel polyols may be blended with conventional polyols to yield excellent rigid foams, thus serving as useful polyol extenders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.