Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1980-12-17
1982-09-07
Robinson, Ellis P.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
20415923, 526261, 428412, 4284228, 428483, 428518, 428520, 428522, 4284735, 428411, 428510, 4284761, B32B 2730, B32B 2736
Patent
active
043484565
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a thermoplastic resin film laminate coated or laminated with a vinyl polymer composed mainly of a (meth)acrylate containing a cyanurate ring.
BACKGROUND OF THE INVENTION
It is well known that thermoplastic resin molded articles generally have poor abrasion resistance and are easily damaged with dust or by scratching, because of their soft surface. The minute surface scratches reduce the surface gloss, transparency, and smoothness, and deteriorate the appearance of the molded article. Such phenomena remarkably reduce the practical value of the molded article, especially the film of the thermoplastic resin, and the improvement of abrasion resistance of a thermoplastic resin molded article has long been desired.
Several means are proposed to improve the abrasion resistance of a thermoplastic resin molded article (for example, film, sheet, etc.). Examples of such means are, application of an inorganic coating layer to the surface, for example, by the vacuum deposition of inorganic glass, SiO.sub.2, metal oxides, etc., or by the coating of a condensate of a hydrolyzable silicon compound to the surface (as disclosed in the specifications of Japanese Patent Laid-open No. 52-25880, Japanese Patent Publication No. 53-39915, Japanese Patent Laid-open No. 53-97098, etc.), and application of an organic coating layer by coating the surface with a polyfunctional (meth)acrylate followed by curing the (meth)acrylate layer with electron rays, ultraviolet radiation or heat.
Although the inorganic coating layer gives a considerable abrasion resistance to the molded article, it has a drawback of cracking caused by stretching, compressing or bending because of its extremely low degree of elongation.
The application of the polyfunctional (meth)acrylate coating layer can be carried out, e.g. by the method disclosed in the specifications of Japanese Patent Laid-open Nos. 49-30466, 53-2567, and 53-102936, or by the use of a compound of the "NK-ester" series (Trade name of Shinnakamura Kagaku KK) known as a reactive crosslinking agent; however, the apparently incompatible requirements of high abrasion resistance and high elongation cannot be satisfied by the above methods because the high abrasion resistance inevitably results in the low elongation, and vice versa, in the above methods.
The isocyanurate ring-containing acrylate compounds disclosed in the Japanese Patent Laid-open No. 48-29880 are not yet satisfactory to give a laminate having sufficiently high abrasion resistance and elongation. The specification of the Japanese Patent Laid-open No. 49-125380 in which the method for the preparation of cyanurate ring-containing (meth)acrylates is disclosed, describes the film prepared by curing the cyanurate ring-containing (meth)acrylate thus obtained is either a "hard and rather brittle" film or a soft one.
DISCLOSURE OF THE INVENTION
As a result of the extensive investigation on the preparation and properties of cyanurate ring-containing (meth)acrylate conducted by the inventors for the purpose of obtaining a laminate having a high abrasion resistance as well as an excellent flexibility, the inventors have found that the thermosetting resin film laminate prepared by the use of a compound which is disclosed in the specification of the Japanese Patent Laid-open No. 49-125380 as the one giving a "hard and rather brittle" film, has a tough coating layer having a high elongation and an excellent abrasion resistance. The present invention provides a thermoplastic resin film laminate obtained by coating and laminating one or both sides of a thermoplastic resin film with a vinyl polymer composed mainly of at least one compound selected from the cyanurate ring-containing (meth)acrylate represented by the general formula I: ##STR1## wherein R.sup.1 -R.sup.5 each represents a hydrogen atom or a methyl group; R.sup.11 -R.sup.15 each represents an alkylene group having a carbon number of 2-4; R.sup.21 and R.sup.22 each represents a 2-4 valent saturated hydrocarbon group having a c
REFERENCES:
patent: 2934525 (1960-04-01), Feketo
patent: 3803088 (1974-04-01), Gardeski
patent: 3927695 (1975-12-01), Crockwell
Horike Akihiro
Imanaka Yoshihiko
Saito Yoichi
Robinson Ellis P.
Teijin Limited
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