Abstract:
Storage-stable, thermally-curable, one-part epoxy resin compositions comprising a curable opoxide resin; a curative amount of an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of said polyol being primary or secondary, and said polyol being free of strong acid groups, and free of electron-withdrawing substituents and large groups which cause steric hindrance in the .alpha.-position in relation to the carbon atoms attached to the methylol groups of the polyol; and a catalytic amount of an imidazole compound.
Abstract:
A friction surface sheet material which may be adherently bonded to the patterned surface of a substrate which permits the visual observation of such pattern when attached. The friction surface sheet material comprises a backing layer formed of a dimensionally stable polymeric film such as polyethylene terephthalate. A first and second coating of the first and second transparent binder material adherently bond a multitude of minute transparent glass particles uniformly dispersed over the upper major surface of the backing layer, with the tops of the glass particles projecting above the binder coating to provide a friction surface, and the bottom major surface of the backing layer has thereon a layer of transparent pressure-sensitive adhesive. The glass particles may be glass spheres or fragments obtained by fracturing larger particles of glass. The transparent sheet material of the invention is particularly suited for applying to the surface of skate boards, particularly those which have ornamental surfaces which the owners desire not to obscure.
Abstract:
A two-part composition useful as an adhesive comprises an epoxy resin, a chain extender selected from an amine or a phenolic compound, a base catalyst and a polymeric toughener wherein Part A contains the catalyst and Part B with the epoxy resin.
Abstract:
Storage-stable, thermally-curable, one-part epoxy resin compositions comprising a curable epoxide resin; a curative amount of an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of said polyol being primary or secondary, and said polyol being free of strong acid groups, and free of electron-withdrawing substituents and large groups which cause steric hindrance in the .alpha.-position in relation to the carbon atoms attached to the methylol groups of the polyol; and a catalytic amount of an imidazole compound.
Abstract:
Disclosed is a thermally-curable, one-part epoxy adhesive composition comprising: (1) a glycidyl ether epoxide having a048477475 n epoxy functionality grater than one and a molecular weight between about 150 and 10,000; (2) a catalyst comprising (i) an acid of the formula H.sup.+ SbF.sub.5 X.sup.- wherein X is halogen, hydroxy, or --OR where --OR is the residue of an aliphatic or aromatic alcohol having a molecular weight less than about 10,000 and (ii) N,N-diethyl-o-toluidine; (3) an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of which are primary or secondary, and being free of electron-withdrawing substituents, amine substituents, or large substituents that cause steric hindrance in the .alpha.-position in relation to the carbon attached to the methylol group of the polyol; and (4) a toughening agent that does not react with the epoxide during curing and has an epoxide compatible component and an epoxide incompatible component.
Abstract:
Storage-stable, thermally-curable, one-part epoxy resin compositions comprising a curable epoxide resin; a curative amount of an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of said polyol being primary or secondary, and said polyol being free of strong acid groups, and free of electron-withdrawing substituents and large groups which cause steric hindrance in the .alpha.-position in relation to the carbon atoms attached to the methylol groups of the polyol; and a catalytic amount of an imidazole compound.
Abstract:
A taping head for applying a film of pressure sensitive adhesive to a receptor surface has a drive means for driving the adhesive to the applicating roller by driving a liner supporting the adhesive, and a dancing roll positioned between the apparatus for stripping the liner from the adhesive and the applicating roller adjusts the speed of movement of the film of adhesive to match the same with the application of the adhesive. The applicator is pressed against the receptor surface under the control of a compression device and a cutting device for adhesive severs the adhesive below the applicating roller and an air nozzle maintains the cut end of the adhesive in a position for subsequent application.