Methacrylic composition for obtaining a coating having a rough texture and a matt appearance
US8475915B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2007 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Jan 28, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a methacrylic composition comprising (100-x-y) parts of at least one methacrylic polymer comprising a MMA homo- or copolymer containing dispersed therein: x parts of particles of a thermoplastic polymer A containing MMA as a majority monomer which is crosslinked or has a weight-average mass Mw>300,000 g/mol, (in relation to a PMMA standard), with a weight-average diameter (ASTM D1921)>100 μm, and <500 μm; and y parts of particles of a crosslinked thermoplastic polymer comprising MMA as a majority monomer, with a weight-average diameter (ASTM D1921) ranging from 15 to 70 μm; such that x varies between 2 to 20 and y varies between 10 to 25. Preferably, x+y<33. The invention also relates to a multilayer structure consisting of: a layer (I) comprising the inventive methacrylic composition; a layer (II) comprising at least one thermoplastic polymer, and an optional intermediate layer between layers (I) and (II).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.