Process for the preparation of filled urethane-based reinforced moldings and the resultant products
US5538786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249986
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a reaction injection molding process for preparing a molded product by reaction of a mixture of PA1 (a) an organic polyisocyanate; PA1 (b) one or more compounds containing at least two isocyanate-reactive groups; PA1 (c) about 2 to about 20% by weight, based on the weight of the molded product, of rigid fibers having a diameter of from about 5 to about 10 micrometers and a length ranging from the diameter of the fiber up to about 2 millimeters, preferably in admixture with component (b); and, optionally, PA1 (d) an inert gas dissolved in at least one of components (a) or (b) in an amount sufficient to produce a molded product having a density of at least 0.80 g/cm.sup.3 ; and PA1 (e) up to 15% by weight, based upon the weight of the molded product, of a filler other than rigid fibers (c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.