US5149741A — Hot melt construction adhesives for disposable so…

Claim 1

Independent Claim 159 words

A hot melt construction adhesive suitable for disposable soft goods and wherein the hot melt construction adhesive is operable to bind a polyolefin or nonwoven substrates to at least one elastic, polyolefin, foam, or nonwoven substrate, the hot melt construction adhesive comprising: (a) about 15 parts to about 40 parts of a styrene-isoprene-styrene block copolymer, and wherein the styrene content of the styrene-isoprene-styrene block copolymer is 25% to 50%, by weight, of the total weight of the styrene-isoprene-styrene block copolymer; (b) about 40 to about 70 parts of a compatible tackifying resin selected from the group consisting of tackifying resins which include pentaerythritol esters; (c) about 5 parts to about 30 parts of a napthenic/paraffinic oil; and (d) 0.1 to 2 parts, by weight, of a phosphite antioxidant, hindered phenolic antioxidant and a stabilizer, and wherein the construction adhesive further is operable to have a melt viscosity of not greater than 6000 cP at a temperature of 325° F.

Claim 2

Dependent Claim 159 words

A hot melt construction adhesive suitable for disposable soft goods and wherein the hot melt construction adhesive is operable to bind a polyolefin or nonwoven substrates to at least one elastic, polyolefin, foam, or nonwoven substrate, the hot melt construction adhesive comprising: (a) about 15 parts to about 40 parts of a styrene-isoprene-styrene block copolymer, and wherein the styrene content of the styrene-isoprene-styrene block copolymer is 25% to 50%, by weight, of the total weight of the styrene-isoprene-styrene block copolymer; (b) about 40 to about 70 parts of a compatible tackifying resin selected from the group consisting of tackifying resins which include pentaerythritol esters; (c) about 5 parts to about 30 parts of a napthenic/paraffinic oil; and (d) 0.1 to 2 parts, by weight, of a phosphite antioxidant, hindered phenolic antioxidant and a stabilizer, and wherein the construction adhesive further is operable to have a melt viscosity of not greater than 6000 cP at a temperature of 325° F.

Claim 3

Dependent Claim 109 words

A hot melt construction adhesive as claimed in claim 1 and wherein the tackifying resin is any compatible resin or mixture thereof selected from the group consisting of (1) natural and modified rosins; (2) glycerol and pentaerythritol esters of natural and modified rosins; (3) polyterpene resins having a softening point as determined by ASTM method E28-58T, of from about 80° C. to 140° C.; (4) copolymers and terpolymers of natural terpenes; (5) phenolic modified terpene resins and the hydrogenated derivatives thereof; (6) aliphatic petroleum resins and the hydrogenated derivatives thereof; (7) aromatic petroleum resin and the hydrogenated derivatives thereof; and (8) aliphatic/aromatic petroleum resins and the hydrogenated derivatives thereof.

Claim 4

Dependent Claim 82 words

A hot melt construction adhesive as claimed in claim 1 and wherein the styrene-isoprene-styrene block copolymer is selected from the group of copolymers which include an unvulcanized elastomeric block copolymer, and wherein the respective monomeric moieties are arranged in an alternating sequence having the general sequence of styrene-isoprene-styrene, and teleblock copolymers having molecules wherein at least three branches radially extend outwardly from a central hub, and wherein each of the branches have polystyrene terminal blocks and an isoprene segment in the center.

Claim 5

Dependent Claim 58 words

A hot melt construction adhesive as claimed in claim 1 and wherein the napthenic/paraffinic oil is selected from the group which includes oligomers of polypropylene, polybutenes, hydrogenated polyisoprene and hydrogenated butadiene, and which have average molecular weights of about 350 to about 10,000, vegetable and animal oils including glycerol esters of fatty acid 1 and polymerization products thereof.

Claim 6

Dependent Claim 31 words

A hot melt construction adhesive as claimed in claim and wherein the Styrene-Isoprene-Styrene block copolymer is selected from the group of copolymers which have less than 30%, by weight, of diblock.

Claim 7

Dependent Claim 165 words

A hot melt construction adhesive for assemblign disposable soft goods, and wherein the hot melt construction adhesive binds a polyolefin or nonwoven substrate to at least one elastic, polyolefin, foam or nonwoven substrate, the hot melt construction adhesive consisting essentially of: (a) about 25 parts to about 50 parts of a styrene-isoprene-styrene copolymer which is selected from the group of copolymers wherein the styrene component of the copolymer is 25% to 50%, by weight, of the styrene-isoprene-styrene copolymer selected; and has less than 30% , by weight of diblock; (b) about 40 to about 60 parts, by weight, of a compatible tackifying resin; (c) about 15 parts, by weight, of a plasticizing oil; (d) about 0 to 5 parts, by weight, of a petroleum derived wax; and (e) 0.1 to 2.0 parts, by weight, of a stabilizer, and wherein the hot melt construction adhesive has a creep-resistance greater than 70%, and a viscosity of not greater than 6000 cP at a temperature of 325° F.

Claim 8

Dependent Claim 165 words

A hot melt construction adhesive for assemblign disposable soft goods, and wherein the hot melt construction adhesive binds a polyolefin or nonwoven substrate to at least one elastic, polyolefin, foam or nonwoven substrate, the hot melt construction adhesive consisting essentially of: (a) about 25 parts to about 50 parts of a styrene-isoprene-styrene copolymer which is selected from the group of copolymers wherein the styrene component of the copolymer is 25% to 50%, by weight, of the styrene-isoprene-styrene copolymer selected; and has less than 30% , by weight of diblock; (b) about 40 to about 60 parts, by weight, of a compatible tackifying resin; (c) about 15 parts, by weight, of a plasticizing oil; (d) about 0 to 5 parts, by weight, of a petroleum derived wax; and (e) 0.1 to 2.0 parts, by weight, of a stabilizer, and wherein the hot melt construction adhesive has a creep-resistance greater than 70%, and a viscosity of not greater than 6000 cP at a temperature of 325° F.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-09-22	1996-03-23	1996-09-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-09-22	2000-03-23	2000-09-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-09-22	2004-03-23	2004-09-22	$7700.00	Window Closed / Lapsed

Hot melt construction adhesives for disposable soft goods

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