| 摘要 |
<p>1,239,514. Laminating plastics to glass and metal. HERCULES Inc. 22 Sept., 1969 [23 Sept., 1968], No. 46679/69. Heading B5N. [Also in Divisions B2, C3 and D1] The adhesion of polymers to glass (including fibrous glass), metal or metal oxide substrates is improved by contacting the substrate with (i) a coupling agent selected from organosilanes, ethylenically unsaturated carboxylic acid-CrCl 3 complexes, unsaturated carboxylic acids and anhydrides, and unsaturated organophosphorus compounds, and (ii) a polyfunctional azide of formula (N 3 COO) y R(SO 2 N 3 ) z where R is an organic radical, y is 0-10, z is 0-10 and y+z=2-10. The azide is activated by heating to its decomposition temperature, e.g. 70- 350‹ C. Mixed azides, requiring two-step activation, can be used. Either (a) the substrate is separately treated with the coupling agent and the azide, or treated with a mixture of these, prior to contacting with the polymer (optionally after storage), or (b) the substrate is treated with the coupling agent and then with an azidepolymer mixture, or (c) the coupling agent, azide and polymer are deposited together on the substrate. The coupling agents and/or azides are applied as solutions or dispersions; if the polymer is included, the mixture is applied as a coating. The polymer can also be applied as a preformed film. Examples (1) to (17) describe the formation of 12-ply laminates of woven glass cloth and films of polypropylene, polyethylene, styreneacrylonitrile copolymer, polystyrene, polyethylene (terephthalate / hexahydroterephthalate), polyoxymethylene and polyvinyl chloride, the cloth having been treated as above, by compression at elevated temperature. In some examples, the treating solutions include a polymer, which can be the same as or different from the polymer of the film. Examples (18) to (20) describe the lamination of glass, aluminium and steel plates to polyethylacrylate and polypropylene films, the treating solution for the plates including the same polymer as the film, so that coated plates are first obtained; these are bonded to the films by heat and pressure. Long lists of suitable polymers, coupling agents and azides are given. In the examples, specified coupling agents areγ-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, acrylic acid, triphenylphosphine oxide, phthalic anhydride, methacrylato chromium chloride, dichlorophenyl phosphine, phenylphosphinic acid,γ-aminopropyltrimethoxysilane, allyldiethylphosphonate, amyltrichlorosilane and phenyltrimethoxysilane. Specified azides are tetramethylene bis (azodiformate), 1,9-nonane bis (sulphonylazide) and 3-azodicarbonyloxypropyl sulphonylazide.</p> |
