Engineering thermoplastic polyurethane reinforced with glass mat
US6803096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jul 13, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/674
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a glass mat thermoplastic comprising a glass mat impregnated with an engineering thermoplastic polyurethane (ETPU) having a Tg of at least 50° C. The glass mat thermoplastic can be prepared, for example, by a) contacting a continuous glass mat with ETPU film or sheet, or between ETPU films or sheets, with sufficient pressure and heat to form a multilayered structure which contains a wetted out glass mat layer sandwiched between an ETPU layer and a glass mat layer, b) thermoforming or compression molding the multilayered structure with sufficient heat to substantially completely wet out the glass mat with the ETPU; and c) cooling the substantially wetted out thermoformed glass mat to a temperature below the Tg of the ETPU. The efficiency with which the depolymerizable and repolymerizable ETPU can be impregnated into the glass mat matrix results in a GMT with excellent physical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.