No drop films or plates consisting of acrylic polymers and process for their preparation
US5547750A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Nov 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns films or plates of acrylic polymers, in particular polymethylmethacrylate, that have no drop properties. The films or plates are coated with a monomeric composition, polymerized and reticulated by ultraviolet light, consisting of: PA1 a) from 50 to 70% by weight of acrylic or methacrylic esters of C.sub.2 -C.sub.18 aliphatic glycols or of (poly)alkylenoxides formed by 1 to 6 of C.sub.2 -C.sub.4 alkyleneoxide units; PA1 b) from 10 to 30% by weight of C.sub.2 -C.sub.4 hydroxyalkyl acrylate or methacrylate; PA1 c) from 10 to 30% by weight of acrylic or methacrylic acid or their derivatives; PA1 d) from 1 to 10% by weight of a reticulation agent consisting of a polyfunctional acrylic monomer containing at least three double bonds, the components of class a) excluded the sum of Components (a)-(d) being 100%, and; PA1 e) from 0.01 to 3 parts by weight for 100 parts by weight of a+b+c+d of hydrophilic colloidal metal oxides and; PA1 f) from 0 to 0.06% parts for 100 parts by weight of a+b+c+d of a U.V. polymerization initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.