Ambient moisture-curing polyurethane adhesive

Details Ambient moisture-curing polyurethane adhesive Ambient moisture-curing polyurethane adhesive

1991-09-11

1994-03-01

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524265, 524588, 524780, 528 60, 528 66, 528 71, 528 73, 528 76, C08G 1010, C08G 1024

Patent

active

052908534

ABSTRACT:
One-part, ambient moisture-curable polyurethane adhesives are produced by reacting with a polyol selected from the group consisting of polyether diols, triols and tetrols based on propylene glycol or ethylene-capped propylene glycol and mixtures thereof with an organic polyisocyanate for a sufficient time to form a reaction product including an isocyanate-terminated prepolymer and unreacted isocyanate, admixing with the reaction product talc or another additive containing free water which reacts with the unreacted isocyanate to extend the chain of the polyurethane and provide hard segments therein, allowing the water-isocyanate reaction to proceed until a predetermined amount of unreacted isocyanate remains and introducing the resulting adhesive into a substantially hermetically sealed container or package.

REFERENCES:
patent: 4687533 (1987-08-01), Rizk et al.
patent: 4876308 (1989-10-01), Melby et al.
patent: 4879365 (1989-11-01), Petschke et al.
patent: 4952621 (1990-08-01), Bandlish
patent: 5075407 (1991-12-01), Cody et al.

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