US4652491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive and tape made therewith
Assignee: 3M Co
•
Filing: 1985-05-02
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Granted: 1987-03-24
•
Expires: 2005-05-02
Abstract
Abstract Pressure-sensitive adhesive capable of functioning as an adhesive for diaper closure tape, comprising a blend of specified portions of styrene:butadiene AB block copolymer, random SBR and/or milled natural rubber, and rosin ester tackifier of the type capable of tackifying butadiene-based rubbers.
Inventors
- 👤 Ramsis Gobran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:24
CPC Classifications
C; C09; C09J; C09J121/00; C09J153/00; C09J153/02; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2883; Y10T428/31504; Y10T428/31826
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
Normally tacky and pressure-sensitive adhesive having particular utility as an adhesive for diaper closure tape, comprising in combination a blend of: a. 100 parts of rubber consisting essentially of (1) 85-40 parts rubbery AB styrene:butadiene block copolymer and correspondingly (2) 15-60 parts other rubbery polymer selected from the class consisting of (a) random styrene:butadiene copolymer and (b) milled natural rubber, and b. 60-170 parts of tackifier capable of tackifying butadiene-based rubbers.
Claim 2
Dependent Claim
71 words
Normally tacky and pressure-sensitive adhesive having particular utility as an adhesive for diaper closure tape, comprising in combination a blend of: a. 100 parts of rubber consisting essentially of (1) 85-40 parts rubbery AB styrene:butadiene block copolymer and correspondingly (2) 15-60 parts other rubbery polymer selected from the class consisting of (a) random styrene:butadiene copolymer and (b) milled natural rubber, and b. 60-170 parts of tackifier capable of tackifying butadiene-based rubbers.
Claim 3
Dependent Claim
25 words
The tape of claim 1 wherein 1 there are 75-45 parts rubbery AB block copolymer correspondingly 25-45 parts other rubbery polymer, and 100-160 parts tackifier.
Claim 4
Dependent Claim
19 words
The tape of claim 2 wherein there are 70-45 parts rubbery AB and correspondingly 30-55 parts other rubbery polymer.
Claim 5
Dependent Claim
12 words
The adhesive of claim 3 further containing an effective amount of antioxidant.
Claim 6
Dependent Claim
18 words
The adhesive of claim 1 wherein the rosin ester tackifier is the highly stabilized glycerol ester of rosin.
Claim 7
Dependent Claim
15 words
The adhesive of claim 1 wherein the natural rubber is milled with an opacifying pigment.
Claim 8
Dependent Claim
50 words
Normally tacky and pressure-sensitive adhesive tape comprising a sheet backing provided with about 20-50 grams per square meter of the adhesive of claim 1, said tape having an adhesion value of at least about 0.75 N/cm width when applied to a thick film of low density polyethylene and removed therefrom.
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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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |