To provide an amine catalyst for curing a polyisocyanate which can satisfy both initial moldability before a thermal compression step and high reactivity at the time of thermal compression molding, and an adhesive composition containing it. A catalyst comprising an amine compound (1) represented by the formula (1) and an amine compound (2) represented by the formula (2) is used as an amine catalyst for curing a polyisocyanate compound. ##STR00001##
wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a C.sub.1-4 hydrocarbon group, and R.sup.3 is a C.sub.1-4 hydrocarbon group having a hydroxy group or an amino group; ##STR00002##
wherein each of R.sup.4 and R.sup.5 which are independent of each other, is a C.sub.1-4 hydrocarbon group, R.sup.6 is a C.sub.1-4 hydrocarbon group or a C.sub.1-4 hydrocarbon group having a hydroxy group or an amino group, R.sup.7 is a C.sub.1-4 hydrocarbon group having a hydroxy group or an amino group, and m is an integer of from 2 to 6.

The invention relates to compositions comprising at least one first and one second component; —the first component K1 comprising at least one di(aminobenzoate) ester A1 of formula (I) with an average molecular weight of 500 g/mol to 2000 g/mol, preferably 600 g/mol to 1500 g/mol and particularly preferred between 650 g/mol and 1300 g/mol, G being a divalent group derived from poly(tetramethylene oxide) diol, and —the second component K2 comprising at least one aromatic polyisocyanate B1 with an average molecular weight of 160 g/mol to 1100 g/mol, preferably 500 g/mol to 800 g/mol.

The invention relates to compositions comprising at least one first and one second component; —the first component K1 comprising at least one di(aminobenzoate) ester A1 of formula (I) with an average molecular weight of 500 g/mol to 2000 g/mol, preferably 600 g/mol to 1500 g/mol and particularly preferred between 650 g/mol and 1300 g/mol, G being a divalent group derived from poly(tetramethylene oxide) diol, and —the second component K2 comprising at least one aromatic polyisocyanate B1 with an average molecular weight of 160 g/mol to 1100 g/mol, preferably 500 g/mol to 800 g/mol.

Adhesive compositions include a blend of a non-siloxane polyurea-based polymer, a non-siloxane polyurethane-based polymer, or a blend of a non-siloxane polyurea-based and non-siloxane polyurethane-based with at least one (meth)acrylate-based pressure sensitive adhesive. The non-siloxane polyurea-based polymer or non-siloxane polyurethane-based polymer is free of free radically polymerized groups. The adhesive composition is a self-wetting, optically clear pressure sensitive adhesive. The adhesive compositions can be coated on substrates to form adhesive articles.

Adhesive compositions include a blend of a non-siloxane polyurea-based polymer, a non-siloxane polyurethane-based polymer, or a blend of a non-siloxane polyurea-based and non-siloxane polyurethane-based with at least one (meth)acrylate-based pressure sensitive adhesive. The non-siloxane polyurea-based polymer or non-siloxane polyurethane-based polymer is free of free radically polymerized groups. The adhesive composition is a self-wetting, optically clear pressure sensitive adhesive. The adhesive compositions can be coated on substrates to form adhesive articles.

Adhesive compositions include a blend of a non-siloxane polyurea-based polymer, a non-siloxane polyurethane-based polymer, or a blend of a non-siloxane polyurea-based and non-siloxane polyurethane-based with at least one (meth)acrylate-based pressure sensitive adhesive. The non-siloxane polyurea-based polymer or non-siloxane polyurethane-based polymer is free of free radically polymerized groups. The adhesive composition is a self-wetting, optically clear pressure sensitive adhesive. The adhesive compositions can be coated on substrates to form adhesive articles.

The two-part curable adhesive composition contains a main agent (A) containing a urethane prepolymer (a1) and a residual polyisocyanate (a2), and a curing agent (B) containing a polyol compound (b1) and a polyamine compound (b2). The urethane prepolymer (a1) is made by reacting in an equivalent ratio of an isocyanate group in a raw material polyisocyanate to a hydroxy group in a polycarbonate polyol being 2.05 or greater. The equivalent ratio of an isocyanate group in the main agent (A) to an active hydrogen group in the curing agent (B) is from 0.5 to 4.

Sulfur-containing polyurea compositions comprising a polyisocyanate and a polyamine are disclosed. The polyisocyanate comprises the reaction product of reactants comprising a diisocyanate having isocyanate groups with different reactivities toward thiol groups, and a thiol-terminated sulfur-containing polymer such as a thiol-terminated polythioether polymer and/or a thiol-terminated polyformal polymer. The polyamine can be an aromatic polyamine and/or an aromatic amine-terminated polythioether adduct. The sulfur-containing polyurea compositions are useful as aerospace sealants.

Sulfur-containing polyurea compositions comprising a polyisocyanate and a polyamine are disclosed. The polyisocyanate comprises the reaction product of reactants comprising a diisocyanate having isocyanate groups with different reactivities toward thiol groups, and a thiol-terminated sulfur-containing polymer such as a thiol-terminated polythioether polymer and/or a thiol-terminated polyformal polymer. The polyamine can be an aromatic polyamine and/or an aromatic amine-terminated polythioether adduct. The sulfur-containing polyurea compositions are useful as aerospace sealants.

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.