US3925271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesive composition
Assignee: Johnson and Johnson
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Filing: 1974-08-08
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Granted: 1975-12-09
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Expires: 1994-08-08
Abstract
Abstract An uncured pressure sensitive adhesive composition wherein the adhesive comprises a rubber elastomer; a tackifier; and at least 14% by weight of a finely divided particulate silica. This adhesive when incorporated on a backing material is particularly useful for sealing the backing material to metal surfaces, especially those which are to be subjected to elevated temperatures, such for example, as tape used to join and seal ventilation duct sections in forced-air heating systems. It also is possible to coat this adhesive effectively by calendering or extrusion.
Inventors
- 👤 Ivan J Balinth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:41
CPC Classifications
C; C09; C09J; C09J201/00; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C08L; C08L101/00; C08L21/00; C08L7/00; C09J107/00; C09J121/00; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/383; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2883
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A PRESSURE-SENSITIVE ADHESIVE COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 14-60% OF UNCRUED OR RECLAIMED ELASTOMERS SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, STYRENE-BUTADIENE RUBBER, NITRILE RUBBER, BUTYL RUBBER, CHLOROPRENE RUBBER, ISOPRENE RUBBER AND ISOBUTYLENE RUBBER; 21-50% TACKIFIER; 0-15% PLASTICIZER; 0.25--4% STABILIZER; 14-19% OF PARTICULATE SILICA HAVING A SURFACE AREA OF AT LEAST 130 METERS 2/GRAM; AND 0-40% OF FILLERS OTHER THAN SILICA; ALL PERCENTAGES BEING BY WEIGHT.
Claim 2
Dependent Claim
14 words
A composition according to claim 1 in which said elastomer is a natural rubber.
Claim 3
Dependent Claim
14 words
A composition according to claim 2 in which said rubber is raw natural rubber.
Claim 4
Dependent Claim
14 words
A composition according to claim 1 in which said tackifier is a polyterpene resin.
Claim 5
Dependent Claim
16 words
A composition according to claim 1 in which said filler is the opacifying agent, titanium dioxide.
Claim 6
Dependent Claim
85 words
A heat resistant pressure sensitive adhesive structure comprising a flexible backing material carrying upon at least one surface thereof an adhesive composition consisting essentially of about 14-60% of uncured or reclaimed elastomers selected from the group consisting of natural rubber, styrene-butadiene rubber, nitrile rubber, butyl rubber, chloroprene rubber, isoprene rubber and isobutylene rubber; 21-50% tackifier; 0-15% plasticizer; 0.25-4% stabilizer; 14-19% of particulate silica having a surface area of at least 130 meters 2/gram; and 0-40% of fillers other than silica; all percentages being by weight.
Claim 7
Dependent Claim
17 words
A pressure sensitive adhesive structure according to claim 6 in which said elastomer is a natural rubber.
Claim 8
Dependent Claim
17 words
A pressure sensitive adhesive structure according to claim 7 in which said rubber is raw natural rubber.
Claim 9
Dependent Claim
17 words
A pressure sensitive adhesive structure according to claim 6 in which said tackifier is a polyterpene resin.
Claim 10
Dependent Claim
19 words
A pressure sensitive adhesive structure according to claim 6 in which said filler is the opacifying agent, titanium dioxide.
References Cited (Backward Citations)
US2909278A
Cited
US3378630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |