US4944993A — Toughened rubber based hot melt adhesive composit…

Claim 1

Independent Claim 82 words

A hot melt adhesive composition suitable for disposable constructions consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene block copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 2

Dependent Claim 82 words

A hot melt adhesive composition suitable for disposable constructions consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene block copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 3

Dependent Claim 35 words

The adhesive of claim 1 wherein the styrene butadiene copolymer contains 37 to 40% styrene, has a modulus at 300% elongation of at least 4.6 MPa and a solution viscosity of 640 to 750 cps.

Claim 4

Dependent Claim 99 words

The adhesive of claim 1 wherein the tackifying resin is selected from the group consisting of natural and modified rosins; glycerol and pentaerythritol esters of natural and modified rosins; copolymers and terpolymers of natural terpenes; polyterpene resins having a softening point, as determined by ASTM method E28-58T, of from about 80° to 150° C.; phenolic modified terpene resins and hydrogenated derivatives thereof; aliphatic petroleum hydrocarbon resins having a Ball and Ring softening point of from about 70° to 135° C.; aromatic petroleum hydrocarbon resins and the hydrogenated derivatives thereof; and alicyclic petroleum hydrocarbon resins and the hydrogenated derivatives thereof.

Claim 5

Dependent Claim 24 words

The hot melt adhesive composition of claim 1 wherein the styrene butadiene copolymer is present in an amount of 15 to 25% by weight.

Claim 6

Dependent Claim 102 words

A disposable article comprising at least one polyethylene or polypropylene substrate bonded to at least one tissue, elastic, non-woven, polyethylene or polypropylene substrate using a hot melt adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 7

Dependent Claim 102 words

A disposable article comprising at least one polyethylene or polypropylene substrate bonded to at least one tissue, elastic, non-woven, polyethylene or polypropylene substrate using a hot melt adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 8

Dependent Claim 39 words

The disposable article of claim 5 wherein the styrene butadiene wherein the styrene butadiene copolymer contains 37 to 40% styrene, has a modulus at 300% elongation of at least 4.6 and a solution viscosity of 640 to 750 cps.

Claim 9

Dependent Claim 104 words

A disposable article of the multi-line construction comprising at least one polyethylene or polypropylene substrate bonded to at least one tissue, non-woven, polyethylene or polypropylene substrate using a hot multi-adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 10

Dependent Claim 104 words

A disposable article of the multi-line construction comprising at least one polyethylene or polypropylene substrate bonded to at least one tissue, non-woven, polyethylene or polypropylene substrate using a hot multi-adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 11

Dependent Claim 35 words

The disposable article of claim 7 wherein the styrene butadiene copolymer contains 37 to 40% styrene, has a modulus at 300% elongation of at least 4.6 and a solution viscosity of 640 to 750 cps.

Claim 12

Independent Claim 101 words

A method for imparting elongation resistant gathers to disposable articles wherein elastic is bonded to a polyethylene, polypropylene, tissue or non-woven substrate using a hot melt adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 13

Independent Claim 101 words

A method for imparting elongation resistant gathers to disposable articles wherein elastic is bonded to a polyethylene, polypropylene, tissue or non-woven substrate using a hot melt adhesive composition consisting essentially of: (a) 10 to 40% by weight of a substantially radial styrene-butadiene bench copolymer having a styrene content greater than 35% by weight, a modulus at 300% elongation of at least 4.5 MPa and a solution viscosity less than 1000 cps; (b) 20 to 65% by weight of at least one compatible tackifying resin; (c) 0.1 to 4% by weight stabilizer; the remainder (to 100%) comprising at least one oil diluent.

Claim 14

Dependent Claim 35 words

The disposable article of claim 9 wherein the styrene butadiene copolymer contains 37 to 40% styrene, has a modulus at 300% elongation of at least 4.6 and a solution viscosity of 640 to 750 cps.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-07-30	1994-01-29	1994-07-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-07-30	1998-01-29	1998-07-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-07-30	2002-01-29	2002-07-31	$7700.00	Window Closed / Lapsed

Toughened rubber based hot melt adhesive compositions for disposable applications

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