Methacrylic resin composition
US5236911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Apr 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a methacrylic resin composition which comprises a mixture of 20-99% by weight of a methacrylic resin and 1-80% by weight of a methacrylic two-layer polymer comprising the following inner layer (a) and outer layer (b) and having the following requirements (c)-(e): PA0 (a) the inner layer being obtained by polymerizing 90-99.9% by weight of a monofunctional monomer which is mainly composed of methyl methacrylate and 0.1-10% by weight of a polyfunctional monomer having at least two carbon-carbon double bonds in one molecule, PA0 (b) the outer layer being obtained by polymerizing a monofunctional monomer mainly composed of methyl methacrylate in the presence of the inner layer, PA0 (c) the weight ratio of the inner layer and the outer layer being 1:9-9:1, PA0 (d) the glass transition temperature being 50-120.degree. C., and PA0 (e) the average particle size being 200-5000 .cuberoot.. This composition is excellent in processability, heat distortion resistance, mechanical properties and solvent resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.