US4022723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive compositions
Assignee: Velsicol Chemical LLC
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Filing: 1975-04-14
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Granted: 1977-05-10
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Expires: 1995-04-14
Abstract
Abstract This invention discloses pressure-sensitive adhesive compositions comprising an elastomer component and a tackifying component containing as an essential ingredient a terpolymer of styrene, isobutylene and beta-pinene.
Inventors
- 👤 Takeo Hokama
- 👤 Frank Scardiglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:01
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L91/00; C08L91/06; C09J121/00; C09J125/00; C09J125/02; C09J125/04; C09J125/08; C09J7/00; C09J7/30; C09J7/38; C08L23/00; C08L23/02; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A pressure-sensitive adhesive composition comprising from about 20 to about 80 weight percent tackifier consisting essentially of a solid, homogeneous and essentially random terpolymer of styrene, isobutylene and beta-pinene having a number average molecular weight of from about 1500 to about 7000, a styrene content of from about 40 to about 60 weight percent, an isobutylene content of from about 10 to about 40 weight percent, a beta-pinene content of from about 10 to about 40 weight percent and a ring and ball softening point of from about 160° to about 240° F, and from about 20 to about 80 weight percent elastomer.
Claim 2
Dependent Claim
103 words
A pressure-sensitive adhesive composition comprising from about 20 to about 80 weight percent tackifier consisting essentially of a solid, homogeneous and essentially random terpolymer of styrene, isobutylene and beta-pinene having a number average molecular weight of from about 1500 to about 7000, a styrene content of from about 40 to about 60 weight percent, an isobutylene content of from about 10 to about 40 weight percent, a beta-pinene content of from about 10 to about 40 weight percent and a ring and ball softening point of from about 160° to about 240° F, and from about 20 to about 80 weight percent elastomer.
Claim 3
Dependent Claim
12 words
The adhesive composition of claim 1 wherein the elastomer is natural rubber.
Claim 4
Dependent Claim
13 words
The adhesive composition of claim 1 wherein the elastomer is styrene butadiene rubber.
Claim 5
Dependent Claim
12 words
The adhesive composition of claim 1 wherein the elastomer is polyisobutylene rubber.
Claim 6
Dependent Claim
11 words
The adhesive composition of claim 1 wherein the elastomer is polyisoprene.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |