Abstract: The invention relates to crosslinking isocyanates for polymeric adhesives containing a mixture of triisocyanatotriphenyl methane and trimerization products of 2,4-tolylene diisocyanate containing at least 50% triisocyanatomonoisocyanurate and less than 1% free tolylene diisocyanate.

Abstract: The present invention is directed to a mixture which can be used as an adhesive. The mixture broadly contains 1) a hydroxy group containing polyurethane, and 2) a polycarbonate and/or a polycaprolactone.

Abstract: This invention relates to new, substantially linear polyester polyurethanes containing hydroxyl end groups, based on selected starting materials, and their use as adhesives or for the production of adhesives.

Abstract: Mixtures of(A) from 20 to 99 parts by weight of a soluble polyurethane,(B) up to 50 parts by weight of an aromatic vinyl compound/diene block polymer,(C) from 0.5 to 50 parts by weight of a modified aromatic vinyl compound/diene polymer and(D) from 0 to 10 parts by weight of a polyisocyanate, optionally dissolved in an organic solvent,have proved to be excellent adhesives.

Abstract: The invention relates to a solvent-free hotmelt adhesive based on polyester polyurethanes which are suitable for the production of composite structures and, in particular, laminated parts for the interior finishing of motor vehicles. The hotmelt adhesive is based on polyester polyurethanes which are obtained by reacting organic polyester polyols and low molecular weight diols as chain-extending agents and which are modified by the incorporation of carboxyl and sulfonate groups. In addition to these modified polyester polyurethanes, the hotmelt adhesive may also contain unmodified polyester polyurethanes and crosslinking agents. The hotmelt adhesive is preferably in the form of a film or an in situ coating on a substrate. The hotmelt adhesive is produced by known processes of the type normally used for producing the known, unmodified polyester polyurethanes.

Abstract: A film is bonded to a substrate by applying a layer of adhesive to the film to be bonded, contacting the film with a substrate and subjecting the adhesive to high energy radiation either before, during or after the film and substrate are contacted. The adhesive layer is from 0.5 to 20 .mu.m thick. The adhesive employed is a mixture of at least one polyisocyanate and at least one compound containing both a (meth)acryloyl group and a hydroxyl group in which the equivalent ratio of hydroxyl to isocyanate groups is from 0.8 to 1 to 1.3 to 1. The substrate to which the film is to be bonded may also be a film. Composites formed in accordance with the present invention are characterized by high initial bond strengths.

Abstract: The instant invention is directed to a process for the preparation of dihydroxypolyurethanes containing carboxyl groups and chemically fixed ionic groups, comprising reacting(A) dihydroxypolyesters having molecular weights of from 600 to 8,000;(B) organic diisocyanates;(C) compounds containing carboxyl groups and groups having a higher isocyanate-reactivity than said carboxyl groups; and(D) compounds containing ionic groups and isocyanate-reactive groupswherein the products of said process contain from 0.01 to 1.0%, by weight of carboxyl groups and from 0.1 to 10 milliequivalents of ionic groups per 100 g of polyurethane.

Abstract: The instant invention relates to compositions comprising certain copolymers and/or graft polymers of styrene or .alpha.-methyl styrene in combination with certain polyurethanes useful as adhesives.