US5262479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizer resisant hot melt pressure sensitive adhesive
Assignee: University of Southern Mississippi Research Foundation
•
Filing: 1992-11-24
•
Granted: 1993-11-16
•
Expires: 2012-11-24
Abstract
Abstract Improved plasticizer resistant pressure sensitive hot melt adhesive compositions are prepared by incorporating in the adhesive polymer, tackifying resin and oil 5 to 70% by weight of the adhesive of a core shell modifier comprising a crosslinked rubbery core and a glassy thermoplastic polymer shell, the core being crosslinked by the presence therein of up to 5% by weight of a polyunsaturated monomer having two or more non-conjugated sites of unsaturation of unequal reactivity.
Inventors
- 👤 Singa D. Tobing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/04; C09J153/00; C09J153/02; C09J153/025; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S525/00; Y10S525/902; Y10S526/00; Y10S526/935
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
In a plasticizer resistant pressure sensitive hot melt adhesive consisting essentially of an adhesive polymer, tackifying resin and oil, the improvement which comprises incorporating therein of 5 to 70% by weight of the adhesive of a core shell modifier comprising a crosslinked rubbery core and a glassy thermoplastic polymer shell, the core being crosslinked by the presence therein up to 5% by weight of a polyunsaturated monomer having two or more non-conjugated sites of unsaturation of unequal reactivity.
Claim 2
Dependent Claim
78 words
In a plasticizer resistant pressure sensitive hot melt adhesive consisting essentially of an adhesive polymer, tackifying resin and oil, the improvement which comprises incorporating therein of 5 to 70% by weight of the adhesive of a core shell modifier comprising a crosslinked rubbery core and a glassy thermoplastic polymer shell, the core being crosslinked by the presence therein up to 5% by weight of a polyunsaturated monomer having two or more non-conjugated sites of unsaturation of unequal reactivity.
Claim 3
Dependent Claim
29 words
The hot melt adhesive of claim 1 wherein the monomers in the rubbery core polymer are selected from the group consisting of lower alkyl acrylates, butadiene and mixtures thereof.
Claim 4
Dependent Claim
26 words
The hot melt adhesive of claim 1 wherein the rubbery core polymer contains up to 20% by weight of other monounsaturated or conjugated dienic copolymerized monomers.
Claim 5
Dependent Claim
39 words
The hot melt adhesive of claim 1 wherein the shell stage is polymerized from methyl methacrylate, functionalized imide oligomers or copolymers thereof or the methyl methacrylate and/or imides are copolymerized with up to 20% of other lower alkyl methacrylates.
Claim 6
Dependent Claim
20 words
The hot melt adhesive of claim 1 wherein the shell stage additionally contains up to 40% by weight monovinylidene monomers.
Claim 7
Dependent Claim
25 words
The hot melt adhesive of claim 5 wherein the monovinylidene monomer is selected from the group consisting of styrene, vinyl acetate, vinyl chloride and acrylonitrile.
Claim 8
Dependent Claim
23 words
The hot melt adhesive of claim 1 wherein the ratio between the core and shell will vary from about 2:1 to about 9.5:1.
Claim 9
Dependent Claim
27 words
The hot melt adhesive of claim 1 wherein the core-shell modifiers comprise butyl acrylate or styrene-butadiene core and a methyl methacrylate shell in a ratio of 9:1.
Claim 10
Dependent Claim
27 words
The hot melt adhesive of claim 1 wherein the core shell modifier is present in an amount of 30 to 50% by weight of the total polymer.
Claim 11
Dependent Claim
34 words
The hot melt adhesive of claim 9 wherein the adhesive base polymer is selected from the group consisting of ethylene vinyl acetate, ethylene-n-butyl acrylate, styrene butadiene styrene, styrene isoprene styrene and styrene-ethylene butylene styrene.
Claim 12
Dependent Claim
17 words
The hot melt adhesive of claim 10 wherein the adhesive base polymer is a styrene block copolymer.
Claim 13
Dependent Claim
17 words
A The hot melt adhesive of claim 11 wherein the block copolymer is a styrene-ethylene-butylene-styrene block copolymer.
References Cited (Backward Citations)
US4028292A
Cited
US3985703A
Cited
US4133731A
Cited
US4544677A
Cited
US4822676A
Cited
JPS644681A
Cited
US5063106A
Cited
US4961993A
Cited
US4942201A
Cited
US4997884A
Cited
US5039744A
Cited
US5079047A
Cited
US5109066A
Cited
US5030538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |