US4411954A
Expired / Lapsed
US
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Hot melt pressure sensitive adhesive and diaper tape closures coated therewith
Assignee: Ingredion Inc
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Filing: 1982-08-16
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Granted: 1983-10-25
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Expires: 2002-08-16
Abstract
Abstract Hot melt pressure sensitive adhesives are formulated using as a base resin a mixture of a styrene-isoprene-styrene block copolymer together with a specific selectively hydrogenated block copolymer within critically defined ratios. The resultant adhesives as well as the tapes coated therewith are characterized by a unique combination of adhesion and heat and oxidative resistance properties.
Inventors
- 👤 Peter J. Butch, III
- 👤 Paul P. Puletti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C09J153/025; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/28; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2883
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
Pressure sensitive tape comprising a sheet backing coated with a layer of normally tacky and hot melt pressure-sensitive adhesive comprising (a) 15 to 40% by weight of a mixture of an A-B-A styrene-isoprene-styrene copolymer and a selectively hydrogenated A-B-A type block copolymer wherein the non-elastomeric block A units in both A-B-A copolymers are present in amounts less than about 25% by weight and wherein the weight ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is within the range of 10:90 to 40:60; (b) 30 to 70% by weight of a tackifying resin; (c) 5 to 30% by weight of a plasticizing oil or liquid polyterpene tackifying resin; and (d) 0.05 to 2.0% by weight of an antioxidant.
Claim 2
Dependent Claim
119 words
Pressure sensitive tape comprising a sheet backing coated with a layer of normally tacky and hot melt pressure-sensitive adhesive comprising (a) 15 to 40% by weight of a mixture of an A-B-A styrene-isoprene-styrene copolymer and a selectively hydrogenated A-B-A type block copolymer wherein the non-elastomeric block A units in both A-B-A copolymers are present in amounts less than about 25% by weight and wherein the weight ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is within the range of 10:90 to 40:60; (b) 30 to 70% by weight of a tackifying resin; (c) 5 to 30% by weight of a plasticizing oil or liquid polyterpene tackifying resin; and (d) 0.05 to 2.0% by weight of an antioxidant.
Claim 3
Dependent Claim
58 words
The pressure sensitive tape of claim 1 wherein the adhesive comprises the mixture of block copolymers in amounts from 20 to 30%; the tackifying resin in amounts from 50 to 60%; the oil or liquid tackifying resin in amounts from 15 to 25%, and the antioxidant in amounts of about 0.5%, by weight of the hot melt composition.
Claim 4
Dependent Claim
107 words
A hot melt pressure sensitive adhesive composition comprising (a) 15 to 40% by weight of a mixture of an A-B-A styrene-isoprene-styrene copolymer and a selectively hydrogenated A-B-A type block copolymer wherein the non-elastomeric block A units in both A-B-A copolymers are present in amounts less than about 25% by weight and wherein the weight ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is within the range of 10:90 to 40:60; (b) 30 to 70% by weight of a tackifying resin; (c) 5 to 30% by weight of a plasticizing oil or liquid polyterpene tackifying resin; and (d) 0.05 to 2.0% by weight of an antioxidant.
Claim 5
Dependent Claim
107 words
A hot melt pressure sensitive adhesive composition comprising (a) 15 to 40% by weight of a mixture of an A-B-A styrene-isoprene-styrene copolymer and a selectively hydrogenated A-B-A type block copolymer wherein the non-elastomeric block A units in both A-B-A copolymers are present in amounts less than about 25% by weight and wherein the weight ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is within the range of 10:90 to 40:60; (b) 30 to 70% by weight of a tackifying resin; (c) 5 to 30% by weight of a plasticizing oil or liquid polyterpene tackifying resin; and (d) 0.05 to 2.0% by weight of an antioxidant.
Claim 6
Dependent Claim
28 words
The hot melt adhesive composition of claim 3 wherein the ratio of non-elastomeric block A units to elastomeric block B units in the selectively hydrogenated copolymer is 14:86.
Claim 7
Dependent Claim
28 words
The hot melt adhesive composition of claim 3 wherein the ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is within the range of 25:75 to 35:65.
Claim 8
Dependent Claim
22 words
The hot melt adhesive composition of claim 3 wherein the ratio of the styrene-isoprene-styrene copolymer to the selectively hydrogenated copolymer is 30:70.
Claim 9
Dependent Claim
56 words
The hot melt adhesive composition of claim 3 comprising a mixture of block copolymers in amounts from 20 to 30%; the tackifying resin in amounts from 50 to 60%; the oil or liquid tackifying resin in amounts, from 15 to 25%, and the antioxidant in amounts of about 0.5%, by weight of the hot melt composition.
Claim 10
Dependent Claim
94 words
The hot melt adhesive composition of claim 3 wherein the tackifying resin is selected from the class consisting of natural and modified rosins; glycerol and pentaerythritol esters of natural and modified rosins; polyterpene resins having a softening point, as determined by ASTM method E28 58T, of from about 60° to 140° C; aliphatic petroleum hydrocarbon resins having a Ball and Ring softening point of from about 60° to 140° C. and the hydrogenated derivatives thereof, aromatic petroleum hydrocarbon resins and the hydrogenated derivatives thereof; and alicyclic petroleum hydrocarbon resins and the hydrogenated derivatives thereof.
Claim 11
Dependent Claim
19 words
The hot melt adhesive composition of claim 3 wherein the plasticizing oil is a naphthenic or paraffinic process oil.
Claim 12
Dependent Claim
31 words
The hot melt adhesive composition of claim 3 wherein the liquid polyterpene tackifying resin consists essentially of polymerized structures derived from aliphatic dienes and mono-olefins of 5 to 6 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |