US4650829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel hydrocarbon resins and their use in adhesives
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1984-12-11
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Granted: 1987-03-17
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Expires: 2004-12-11
Abstract
Abstract Hydrogenated hydrocarbon resins from cyclopentadiene and/or substituted cyclopentadiene of softening point below 90 DEG C. and having a (Tg) as from 35 to 70 lower than the softening point with less than 12 wt. % of the resin having a molecular weight above 1000 are particularly useful as tackifiers in pressure sensitive adhesives especially in hydrogenated styrene/butadiene/styrene block copolymer adhesive formulations where their use can obviate the need for plasticizing oil.
Inventors
- 👤 Bernard Bossaert
- 👤 Andre Lepert
- 👤 Jacques Lechat
- 👤 Vincent L. Hughes
- 👤 Raymond C. C. Yap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:23
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04; C09; C09J; C09J153/00; C09J153/02; C09J153/025; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A hydrogenated hydrocarbon resin containing at least 40 wt. % of monomer units derived from cyclopentadiene alone and cyclopentadiene plus a comonomer of the class consisting of alkyl substituted cyclopentadiene, acyclic dienes, vinyl aromatics and mixtures having a softening point (SP) which is lower than 90° C. and a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) which is from 35° to 70° C. lower than the softening point and less than 12 wt. % of said resin having a molecular weight above 1000.
Claim 2
Dependent Claim
87 words
A hydrogenated hydrocarbon resin containing at least 40 wt. % of monomer units derived from cyclopentadiene alone and cyclopentadiene plus a comonomer of the class consisting of alkyl substituted cyclopentadiene, acyclic dienes, vinyl aromatics and mixtures having a softening point (SP) which is lower than 90° C. and a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) which is from 35° to 70° C. lower than the softening point and less than 12 wt. % of said resin having a molecular weight above 1000.
Claim 3
Dependent Claim
23 words
A hydrogenated hydrocarbon resin according to claim 1 in which the Tg is from 40° to 60° C. lower than the softening point.
Claim 4
Dependent Claim
16 words
A hydrogenated resin according to claim 1 having a softening point of 45° to 80° C.
Claim 5
Dependent Claim
21 words
A resin according to claim 1 wherein said cyclopentadiene monomer is at least 45 weight percent of the total polymerizable monomers.
Claim 6
Dependent Claim
20 words
A resin according to claim 1 wherein said cyclopentadiene is at least 60 weight percent of the total polymerizable monomers.
Claim 7
Dependent Claim
21 words
An adhesive composition comprising (i) an elastomeric polymer; and, as tackifier for said polymer, (ii) a resin according to claim 1.
Claim 8
Dependent Claim
15 words
An adhesive composition according to claim 6 wherein the elastomeric polymer is a block copolymer.
Claim 9
Dependent Claim
18 words
An adhesive composition according to claim 6 wherein the elastomeric polymer is a hydrogenated block copolymer of polystyrene-polybutadiene-polystyrene.
Claim 10
Dependent Claim
22 words
An adhesive composition according to claim 8 which comprises from 100-250 parts by weight resin per 100 parts by weight elastomeric polymer.
Claim 11
Dependent Claim
15 words
An adhesive composition according to claim 6 which contains no oil and/or other plasticizing material.
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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |