US4394915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive compositions and bottle assemblies using said compositions
Assignee: Bostik Inc
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Filing: 1982-04-12
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Granted: 1983-07-26
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Expires: 2002-04-12
Abstract
Abstract A hot melt adhesive especially useful for producing PET bottle assemblies comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent. PET bottle assemblies prepared using the above adhesive compositions are more resistant to separation than those prepared with prior art compositions not containing the ethylene/vinyl acetate copolymer.
Inventors
- 👤 Jeffrey Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
C; C09; C09J; C09J191/00; C09J191/06; C09J153/00; C09J153/02; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A hot melt adhesive which comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) an A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent.
Claim 2
Dependent Claim
104 words
A hot melt adhesive which comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) an A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent.
Claim 3
Dependent Claim
15 words
The adhesive composition of claim 1 wherein the block copolymer is a styrene-butadiene-styrene block copolymer.
Claim 4
Dependent Claim
85 words
The adhesive composition of claim 1 wherein the wax diluent is selected from the group consisting of low molecular weight polyethylene having a hardness value of 0.1 to 120 and an ASTM softening point of 150°-250° F., petroleum waxes having a melting point of 130°-175° F., microcrystalline wax having a melting point of 135°-200° F., atactic polypropylene having a Ball and Ring softening point of 120°-160° C., synthetic waxes made by polymerizing carbon monoxide and hydrogen and hydrogenated animal, fish and vegetable fats and oils.
Claim 5
Dependent Claim
14 words
The adhesive composition of claim 1 wherein the oil diluent is a mineral oil.
Claim 6
Dependent Claim
15 words
The adhesive composition of claim 1 wherein the block copolymer is a styrene-isoprene-styrene block copolymer.
Claim 7
Dependent Claim
59 words
The adhesive composition of claim 1 wherein the tackifying resin is selected from the group consisting of natural and modified rosin, glycerol and pentaerythritol esters of natural and modified rosin, polyterpene resins having a softening point of 60° to 140° C., phenolic-modified terpene resins, and aliphatic petroleum hydrocarbon resins having a Ball and Ring softening point of 60°-140° C.
Claim 8
Dependent Claim
20 words
The adhesive composition of claim 1 wherein the stabilizer is a high molecular weight hindered phenol or a multifunctional phenol.
Claim 9
Dependent Claim
85 words
The adhesive composition of claim 1 wherein the hot melt adhesive contains a concentration of the block polymer ranging from about 20 to 40%, a concentration of ethylene/vinyl acetate of from about 5 to 20%, a concentration of tackifying resin ranging from about 30 to 60%, a concentration of stabilizer ranging from about 0.1 to 4% and a concentration of wax or oil diluent ranging from about 10 to 30%, said concentrations being based on a 100% solids total weight of the hot melt composition.
Claim 10
Dependent Claim
124 words
A PET bottle assembly comprising a PET bottle which has been blow-molded and joined to a HDPE base cup with a hot melt adhesive which comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) an A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent.
Claim 11
Dependent Claim
124 words
A PET bottle assembly comprising a PET bottle which has been blow-molded and joined to a HDPE base cup with a hot melt adhesive which comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) an A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent.
Claim 12
Dependent Claim
34 words
The PET bottle assembly of claim 9 wherein the block copolymer is a styrene-butadiene-styrene block copolymer and the ethylene/vinyl acetate copolymer has a melt index of about 400 and contains about 28% vinyl acetate.
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) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |