Briefly, the present disclosure provides a film, tape or outer layer of a composite part comprising: a) at least one layer comprising a crosslinked polymer selected from the group consisting of crosslinked polyurethane, crosslinked polyurea, and crosslinked mixed polyurethane/polyurea polymer; and in some embodiments b) an adhesive layer. In some embodiments the layer additionally comprises a non-crosslinked polymer forming a semi-IPN with the crosslinked polymer. In some embodiments the non-crosslinked polymer may be selected from the group consisting of polyurethane, polyurea, and mixed polyurethane/polyurea polymer. In some embodiments the crosslinked polymer may additionally comprise an acrylate-containing component.

The present invention relates to a polyurea system, the use of such a polyurea system for sealing, linking, gluing, or covering of cellular tissue, and a dosing system having two chambers for a polyurea system such as this. The polyurea system comprises as components: A) an isocyanate-functioning prepolymer, which can be derived by reacting aliphatic isocyanates with polyoles, and B) an amino-functioning ester of aspartic acid. According to the invention, water and/or tertiary amine is added to the system, in order to increase the reacting speed of the prepolymer with the amino-functioning ester of aspartic acid while decreasing the setting time at the same time.

The present invention relates to a polyurea system, the use of such a polyurea system for sealing, linking, gluing, or covering of cellular tissue, and a dosing system having two chambers for a polyurea system such as this. The polyurea system comprises as components: A) an isocyanate-functioning prepolymer, which can be derived by reacting aliphatic isocyanates with polyoles, and B) an amino-functioning ester of aspartic acid. According to the invention, water and/or tertiary amine is added to the system, in order to increase the reacting speed of the prepolymer with the amino-functioning ester of aspartic acid while decreasing the setting time at the same time.

Disclosed are silane modified copolymers that are moisture curable; curable adhesive compositions comprising the silane modified copolymers; and methods of making the silane modified copolymers.

A process comprising a) mixing i) an isocyanate reactive component that contains from 2 to 100 weight percent of an aminobenzoate terminated composition wherein the isocyanate reactive component does not contain a solvent; and ii) an isocyanate terminated component having an isocyanate functionality of from 2 to 6 wherein the isocyanate terminated component does not contain a solvent; at a stoichiometric ratio of NCO to reactive hydrogen in the range of from 0.9 to 2.5; to form an adhesive composition; b) applying the adhesive composition to a primary substrate; and c) laminating the primary substrate with a secondary film to form a laminate structure, is disclosed. The laminate structure can be used as a laminating adhesive.

A process comprising a) mixing i) an isocyanate reactive component that contains from 2 to 100 weight percent of an aminobenzoate terminated composition wherein the isocyanate reactive component does not contain a solvent; and ii) an isocyanate terminated component having an isocyanate functionality of from 2 to 6 wherein the isocyanate terminated component does not contain a solvent; at a stoichiometric ratio of NCO to reactive hydrogen in the range of from 0.9 to 2.5; to form an adhesive composition; b) applying the adhesive composition to a primary substrate; and c) laminating the primary substrate with a secondary film to form a laminate structure, is disclosed. The laminate structure can be used as a laminating adhesive.

An adhesive kit 1 separately includes a main agent layer 2 containing a polyamine component, and a curing agent layer 3 containing a polyisocyanate component. When the main agent layer 2 is reacted with the curing agent layer 3, the reactive parameter Pr exceeds 40% and the diffusion parameter Pd exceeds 15%.

The present invention relates to an aqueous polyurethane-urea dispersion and a preparation process thereof, an adhesive containing the same, and an adhesion article obtained by adhering with said adhesive. The aqueous polyurethane-urea dispersion comprises a polyurethane-urea dispersed therein, said polyurethane-urea is obtained from a reaction of a system comprising the following components: a polyisocyanate mixture; a polyester polyol having a melting temperature of greater than 32° C., wherein the melting temperature is measured by using a DSC-7 from Perkin-Elmer at 20-100° C. according to DIN 65467, and taken from the first temperature-rising curve; an emulsifier; an optional monohydroxy polyether and an optional diamine; the polyisocyanate mixture contains hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, the amount of hexamethylene diisocyanate is 0.01 wt %-25 wt %, the amount of dicyclohexylmethane diisocyanate is 0.01 wt %-6 wt %, based on the amount of the system as 100 wt %. The adhesive containing the aqueous polyurethane-urea dispersion of the present invention has a low activation temperature and a good mechanical property.

The present invention relates to an aqueous polyurethane-urea dispersion and a preparation process thereof, an adhesive containing the same, and an adhesion article obtained by adhering with said adhesive. The aqueous polyurethane-urea dispersion comprises a polyurethane-urea dispersed therein, said polyurethane-urea is obtained from a reaction of a system comprising the following components: a polyisocyanate mixture; a polyester polyol having a melting temperature of greater than 32° C., wherein the melting temperature is measured by using a DSC-7 from Perkin-Elmer at 20-100° C. according to DIN 65467, and taken from the first temperature-rising curve; an emulsifier; an optional monohydroxy polyether and an optional diamine; the polyisocyanate mixture contains hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, the amount of hexamethylene diisocyanate is 0.01 wt %-25 wt %, the amount of dicyclohexylmethane diisocyanate is 0.01 wt %-6 wt %, based on the amount of the system as 100 wt %. The adhesive containing the aqueous polyurethane-urea dispersion of the present invention has a low activation temperature and a good mechanical property.

To provide an adhesive composition capable of firmly bonding polymer sheets together, comprising: (I) 100 parts by mass of an end-unreactive urethane urea resin; and (III) 4.0 to 20 parts by mass of a polyisocyanate compound having at least two isocyanate groups in the molecule, wherein the polyisocyanate compound (III) contains (IIIA) a polyisocyanate compound having an isocyanate group bonded to secondary carbon and (IIIB) a polyisocyanate compound having 4 to 30 carbon atoms in the molecule other than the component (IIIA), and the amount of the component (IIIB) is 10 to 500 parts by mass based on 100 parts by mass of the component (IIIA).