US4247676A — Storable flowable polyurethane adhesive compositi…

Claim 1

Independent Claim 129 words

A storable liquid polyurethane composition comprising an equivalent of a prepolymer formed by reacting a liquid material having 2 to 5 hydroxyls and characterized by the ability to dissolve at 80° C. more than 0.13 gram of a 50/50 mixture of sodium chloride-4,4'-diphenylene diamine complex and tetraethylene di(2-ethyl hexoate) in 100 grams of said liquid material with sufficient organic polyisocyanate to give an excess of 3 to 15 percent free NCO in said prepolymer, said organic polyisocyanate being selected from the class consisting of methane di(phenyl isocyanate) and a mixture of a toluene diisocyanate and a polyaryl methane polyisocyanate with 0.85 to 1.15 equivalents of a complex of an alkali metal salt with 4,4'-diphenylmethane diamine, said alkali metal being selected from the class consisting of sodium, potassium and lithium.

Claim 2

Dependent Claim 129 words

A storable liquid polyurethane composition comprising an equivalent of a prepolymer formed by reacting a liquid material having 2 to 5 hydroxyls and characterized by the ability to dissolve at 80° C. more than 0.13 gram of a 50/50 mixture of sodium chloride-4,4'-diphenylene diamine complex and tetraethylene di(2-ethyl hexoate) in 100 grams of said liquid material with sufficient organic polyisocyanate to give an excess of 3 to 15 percent free NCO in said prepolymer, said organic polyisocyanate being selected from the class consisting of methane di(phenyl isocyanate) and a mixture of a toluene diisocyanate and a polyaryl methane polyisocyanate with 0.85 to 1.15 equivalents of a complex of an alkali metal salt with 4,4'-diphenylmethane diamine, said alkali metal being selected from the class consisting of sodium, potassium and lithium.

Claim 3

Dependent Claim 22 words

The composition of claim 1 containing a small amount to 50 parts of silicate filler per hundred parts of the polyurethane composition.

Claim 4

Dependent Claim 30 words

The composition of claim 1 wherein at least 1 part and up to about 50 parts of talc or silicate filler is present for each 100 parts of said composition.

Claim 5

Dependent Claim 28 words

The composition of claim 1 wherein the liquid material is a copolymer of ethylene glycol and tetramethylene ether glycol having a molecular weight of about 1000 to 2500.

Claim 6

Dependent Claim 131 words

A storable liquid polyurethane adhesive composition capable of adhering two low profile fiberglass strips to yield a bond in excess of 42.1860 kilograms per square meter and comprising a mixture of a prepolymer having 3 to 15 mol percent of free NCO and 0.85 to 1.15 equivalents based on free NCO of said prepolymer with a complex of an alkali metal salt with 4,4'-diphenylmethane diamine, said salt being selected from the class consisting of sodium salts and potassium salts, said prepolymer being a reaction product of an organic polyisocyanate with a liquid polyol having 2 to 3 hydroxyls and exhibiting an ability to dissolve at 80° C. more 0.13 gram of a 50/50 mixture of said complex of the sodium salt and tetraethylene di(2-ethyl hexoate) in 100 grams of said polyol.

Claim 7

Dependent Claim 131 words

A storable liquid polyurethane adhesive composition capable of adhering two low profile fiberglass strips to yield a bond in excess of 42.1860 kilograms per square meter and comprising a mixture of a prepolymer having 3 to 15 mol percent of free NCO and 0.85 to 1.15 equivalents based on free NCO of said prepolymer with a complex of an alkali metal salt with 4,4'-diphenylmethane diamine, said salt being selected from the class consisting of sodium salts and potassium salts, said prepolymer being a reaction product of an organic polyisocyanate with a liquid polyol having 2 to 3 hydroxyls and exhibiting an ability to dissolve at 80° C. more 0.13 gram of a 50/50 mixture of said complex of the sodium salt and tetraethylene di(2-ethyl hexoate) in 100 grams of said polyol.

Claim 8

Dependent Claim 21 words

The adhesive of claim 5 wherein the prepolymer and the complex are mixed at a temperature less than about 10° C.

Claim 9

Dependent Claim 28 words

The composition of claim 1 containing a catalytic amount of an organic acidic compound to effect cure at a lower temperature than obtainable without said organic acidic compound.

Claim 10

Dependent Claim 22 words

The composition of claim 7 wherein the organic acidic compound is an aliphatic dicarboxylic acid of about 4 to 10 carbon atoms.

Claim 11

Dependent Claim 11 words

The adhesive of claim 5 wherein the polyol has two hydroxyls.

Claim 12

Dependent Claim 11 words

The adhesive of claim 9 wherein the polyol is a glycol.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-01-27	1984-07-28	1985-01-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-01-27	1988-07-28	1989-01-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-01-27	1992-07-28	1993-01-27	$7700.00	Window Closed / Lapsed

Storable flowable polyurethane adhesive composition

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