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US4994516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum resins and their production
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1989-04-03
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Granted: 1991-02-19
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Expires: 2009-04-03
Abstract
Abstract Resins having an improved combination of softening point and tackifying properties together with good color and heat stability are obtained by Freidel-Crafts copolymerization of 4 to 80 wt. % of a C5/C6 unsaturated feed; 5 to 55 wt. % of a terpene and 3 to 55 wt. % of an unsaturated aromatic compound.
Inventors
- 👤 Quoc Luvinh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:52
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/14; C08F240/00; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S526/00; Y10S526/916
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A hot melt adhesive comprising: (i) an ethylene vinyl acetate copolymer; (ii) wax; and (iii) a resin consisting essentially of a copolymer containing from 5 to 80 wt. % units derived from an olefinically unsaturated aromatic compound, from 5 to 80 wt. % units derived from C 5 olefins or diolefines or C 6 olefines or diolefines or a mixture thereof, and from 7 to 45 wt. % units derived from a terpene.
Claim 2
Dependent Claim
73 words
A hot melt adhesive comprising: (i) an ethylene vinyl acetate copolymer; (ii) wax; and (iii) a resin consisting essentially of a copolymer containing from 5 to 80 wt. % units derived from an olefinically unsaturated aromatic compound, from 5 to 80 wt. % units derived from C 5 olefins or diolefines or C 6 olefines or diolefines or a mixture thereof, and from 7 to 45 wt. % units derived from a terpene.
Claim 3
Dependent Claim
23 words
The hot melt adhesive of claim 1 wherein said resin has a softening point of from about 60° C. to about 120° C.
Claim 4
Dependent Claim
23 words
The hot melt adhesive of claim 2 wherein said resin has a softening point of from about 75° C. to about 115° C.
Claim 5
Dependent Claim
23 words
The hot melt adhesive of claim 3 wherein said resin has a softening point of from about 90° C. to about 105° C.
Claim 6
Dependent Claim
18 words
The hot melt adhesive of claim 1 wherein the olefinically unsaturated aromatic compound of said resin is styrene.
Claim 7
Dependent Claim
17 words
The hot melt adhesive of claim 1 wherein said resin is substantially free from cyclopentadiene and dicyclopentadiene.
Claim 8
Dependent Claim
19 words
The hot melt adhesive of claim 6 wherein said resin contains less than 2 wt. % cyclopentadiene or dicyclopentadiene.
Claim 9
Dependent Claim
21 words
The hot melt adhesive of claim 1 wherein said resin has a molecular weight of from about 500 to about 1500.
Claim 10
Dependent Claim
19 words
The hot melt adhesive of claim 1 wherein said resin has a Gardner color of about 4 or less.
Claim 11
Dependent Claim
15 words
The hot melt adhesive of claim 1 wherein said resin contains alpha-pinene as the terpene.
Claim 12
Dependent Claim
15 words
The hot melt adhesive of claim 1 wherein said resin contains carene as the terpene.
Claim 13
Dependent Claim
15 words
The hot melt adhesive of claim 1 wherein said resin contains limonene as the terpene.
Claim 14
Dependent Claim
19 words
The hot melt adhesive of claim 1 wherein said resin also contains units derived from a chain transfer agent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |