Polycarbonate composite having an increased pencil hardness
US11485830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2017 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a polycarbonate composite having an increased pencil hardness, comprising a polycarbonate substrate prepared from a thermoplastic aromatic (co)polycarbonate having a glass-transition temperature in the range of 160 to 210° C.; and a coating on said substrate, said coating being formed by curing a polysiloxane-based thermosetting coating material at a temperature in the range of 140 to 210° C. for 0.5 to 2 hours. The polycarbonate composite has a pencil hardness higher than H, as measured according to ASTM D3363. The present invention also relates to a method for producing said polycarbonate composite and an article comprising the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.