Abstract: A self-emulsifiable polyisocyanate with high functionality, having the average number of functional groups in 4.3 or more and a viscosity of 8,000 mPa·s (at 25° C.) or less, which is obtained by subjecting a modified polyisocyanate containing allophanate bonds and a poly(oxyalkylene)glycol monoalkyl ether (e) having oxyethylene bonds in a total amount of 30 mole % or more in its molecule to a urethanization reaction, said modified polyisocyanate being obtained by reacting a polyol (a) having the average number of functional groups in an amount of 2 or more with an organic polyisocyanate (b) in the presence of an allophanate-forming catalyst (c) comprising a zirconium carboxylate; and a process for producing the same.

Abstract: A non-aqueous laminate adhesive comprising a tertiary amino group-containing polyurethane resin (A) or a tertiary amino group- and carboxyl group-containing polyurethane resin (B) and a polyisocyanate curing agent. The resin (A) is obtained from (1) an active hydrogen group-containing compound comprising at least one or more kinds of tertiary amino group-containing glycols and (3) an organic polyisocyanate; and the resin (B) is obtained from (2) an active hydrogen group-containing compound comprising at least (a) one or more kinds of tertiary amino group-containing glycols and (b) one or more kinds of carboxyl group-containing glycols and (3) an organic polyisocyanate. The content of the tertiary amino group in the resin (A), the content of the tertiary amino group in the resin (B), and the carboxyl group in the resin (B) are each 0.001 to 1 mmol/g.

Abstract: A polyisocyanate curing agent comprising an isocyanate group-terminated prepolymer and a silane coupling agent represented by formula (2), OCN—(CH2)x—Si(OR′)3  (2) wherein R is an alkyl group having 1 to 5 carbon atoms and m and n is each an integer of 1 or more; and an adhesive for forming laminates based on the above polyisocyanate curing agent and an active hydrogen-group containing resin.

Abstract: A polyisocyanate curing agent for laminate adhesive, comprising: (A) an isocyanate group-terminated prepolymer having isocyanurate group and urethane group, obtained by reacting an organic polyisocyanate containing at least (a1) an aromatic diisocyanate with an active hydrogen group-containing compound containing at least (a2) a diol compound having a number-average molecular weight of 100 to 2,000, and, as an optional component, (B) an isocyanate group-terminated prepolymer having urethane group, and, also as an optional component, (C) a silane coupling agent represented by the following general formula (1): OCN—(CH2)m—Si(OR)3  (1)  (wherein R is a methyl group or an ethyl group, and m is an integer of 1 to 5); and a process for producing the polyisocyanate curing agent. The polyisocyanate curing agent is usable in a laminate adhesive which can be aged in a short time without shortening the pot life, which has good adhesivity, and which can withstand a severe retort treatment.

Abstract: A self-emulsifiable polyisocyanate with high functionality, having the average number of functional groups in 4.3 or more and a viscosity of 8,000 mPa.s (at 25° C.) or less, which is obtained by subjecting a modified polyisocyanate containing allophanate bonds and a poly(oxyalkylene)glycol monoalkyl ether (e) having oxyethylene bonds in a total amount of 30 mole % or more in its molecule to a urethanization reaction, said modified polyisocyanate being obtained by reacting a polyol (a) having the average number of functional groups in an amount of 2 or more with an organic polyisocyanate (b) in the presence of an allophanate-forming catalyst (c) comprising a zirconium carboxylate; and a process for producing the same.

Abstract: A non-aqueous laminate adhesive comprising a tertiary amino group-containing polyurethane resin (A) or a tertiary amino group- and carboxyl group-containing polyurethane resin (B) and a polyisocyanate curing agent. The resin (A) is obtained from (1) an active hydrogen group-containing compound comprising at least a tertiary amino group- and hydroxyl group-containing compound and (3) an organic polyisocyanate; and the resin (B) is obtained from (2) an active hydrogen group-containing compound comprising at least a tertiary amino group- and hydroxyl group-containing compound and a carboxyl group- and hydroxyl group-containing compound and (3) an organic polyisocyanate. The content of the tertiary amino group in the resin (A), the content of the tertiary amino group in the resin (B), and the carboxyl group in the resin (B) are each 0.001 to 1 mmol/g.

Abstract: A polyisocyanate curing agent for laminate adhesive, comprising:

Abstract: A polyisocyanate curing agent comprising an isocyanate group-terminated prepolymer and a silane coupling agent represented by the following formula (2); and a laminate adhesive comprising the above polyisocyanate curing agent and an active hydrogen group-containing resin. The isocyanate group-terminated prepolymer can be obtained by reacting an organic polyisocyanate containing at least (c) an aliphatic polyisocyanate and/or an alicyclic polyisocyanate, with (a) a block polyether monool represented by the following formula (1) wherein the oxypropylene group content is larger than the oxyethylene group content and, optionally, (b) an active hydrogen group-containing aliphatic compound other than the compound (a).

Abstract: An adhesive for lamination which comprises a resin whose dynamic wettability to a film substrate is at least 0.20 mN alone or in combination with a polyisocyanate curing agent, said adhesive for lamination having a good adhesiveness to a film substrate such as a plastic film, a metal foil, a metallized film or paper.

Abstract: A polyisocyanate curing agent for a laminate adhesive, which comprises a hydrophilic polar group-containing polyisocyanate; a laminate adhesive excellent in heat-resistance, durability and adhesiveness to polyolefin film which adhesive comprises the above hydrophilic polar group-containing polyisocyanate and an active hydrogen-containing compound; and use of an adhesive comprising the above polyisocyanate curing agent and an active hydrogen-containing compound in film lamination.

Abstract: An aqueous emulsion which comprises as a resin component a self-emulsifiable copolymer in which at least one ethylenically unsaturated monomer and at least one urethane prepolymer having at least one mercapto group and at least one hydrophilic, polar group are bonded by radical polymerization or in which at least one ethylenically unsaturated monomer, at least one organic polyisocyanate, at least one compound having at least one mercapto group and at least one active hydrogen-containing group and at least one compound having at least one hydrophilic, polar group and at least one active hydrogen-containing group are bonded by urethanization reaction and radical polymerization. The aqueous emulsion is better in storage stability than conventional ones.