US5373041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt pressure sensitive adhesives
Assignee: EIDP Inc
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Filing: 1990-08-27
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Granted: 1994-12-13
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Expires: 2010-08-27
Abstract
Abstract A pressure sensitive adhesive composition which can be applied by hot melt techniques to one surface and adhered to a second surface by contact at ambient temperature, to thereby bond the two surfaces together. The adhesive composition is made of certain ethylene/n-butyl acrylate copolymers together with tackifier and optionally, plasticizer.
Inventors
- 👤 George W. Prejean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:26
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A hot melt pressure sensitive adhesive composition consisting essentially of (a) about 25 to 50% by wt. of copolymer having a melt index of about 5 to 40 g/10 min. of (i) about 60 to 70% by wt. of ethylene, (ii) about 30 to 40% by wt. of n-butyl acrylate, and (iii) 0 to about 5% by wt. of (meth)acrylic acid, based on the weight of the copolymer, with the acid being 0 to about 40% neutralized by metal ions and (b) tackifier and optionally, plasticizer, in an amount from about 50 to 75% by wt. based on the total weight of the composition whereby said composition is a pressure sensitive adhesive.
Claim 2
Dependent Claim
112 words
A hot melt pressure sensitive adhesive composition consisting essentially of (a) about 25 to 50% by wt. of copolymer having a melt index of about 5 to 40 g/10 min. of (i) about 60 to 70% by wt. of ethylene, (ii) about 30 to 40% by wt. of n-butyl acrylate, and (iii) 0 to about 5% by wt. of (meth)acrylic acid, based on the weight of the copolymer, with the acid being 0 to about 40% neutralized by metal ions and (b) tackifier and optionally, plasticizer, in an amount from about 50 to 75% by wt. based on the total weight of the composition whereby said composition is a pressure sensitive adhesive.
Claim 3
Dependent Claim
19 words
The adhesive composition of claim 1 wherein the amount of said acid is about 0.5 to 5% by wt.
Claim 4
Dependent Claim
12 words
The adhesive composition of claim 1 wherein said acid is methacrylic acid.
Claim 5
Dependent Claim
36 words
The adhesive composition of claim 1 wherein about 25 to 65% by wt. of said tackifier is present in the composition and about 5 to 25% by wt. of said plasticizer is present in the composition.
Claim 6
Dependent Claim
17 words
The adhesive composition of claim 1 exhibiting a shear adhesion failure temperature of at least 55° C.
Claim 7
Dependent Claim
48 words
The adhesive composition of claim 1 wherein said tackifier is selected from the group consisting of rosin acids derived from wood, gum or tall oil and their hydrogenated, disproportionated, mildly polymerized or ester derivatives; terpene resins; dicyclopentadiene-aromatic hydrocarbon resins; and low molecular weight styrene or substituted styrene resins.
Claim 8
Dependent Claim
12 words
The adhesive composition of claim 5 wherein said tackifier is rosin ester.
Claim 9
Dependent Claim
39 words
The adhesive composition of claim 4 wherein said plasticizer is selected from the group consisting of phthalates, azelates, adipates, tricresyl phosphate, polyesters, and low molecular weight alkylated phenol, phenol modified Coumarone-indene, terpene and synthetic terpene resins, and processing oils.
Claim 10
Dependent Claim
13 words
The adhesive composition of claim 8 wherein said plasticizer is naphthenic processing oil.
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) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |