US3930102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive sheets and webs and process for their manufacture
Assignee: Beiersdorf AG
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Filing: 1974-04-11
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Granted: 1975-12-30
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Expires: 1994-04-11
Abstract
Abstract Self-adhesive webs or sheets are disclosed which are ageresistant and are easily removed, even after long periods of application and after high temperature exposure. They are prepared by coating a base with a reactive mixture of a branched polyether having terminal hydroxyl groups, an aliphatic diisocyanate, an organometallic catalyst and an aging preventative, and heating the thus-coated base.
Inventors
- 👤 Heinz Muller
- 👤 Bodo Szonn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:13
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08G18/70; C08G18/72; C08G18/73; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/17; C08K5/18; C08K5/36; C08K5/45; C08K5/46; C08K5/47; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; C08L; C08L2666/00; C08L2666/28; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10T; Y10T428/00; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2896; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31573; Y10T428/31587; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A SELF-ADHESIVE WEB OR SHEET MATERIAL, WHICH COMPRISES A BASE SHEET WHICH IS LAMINATED WITH A POLYURETHANE-BASED, SELF-ADHESIVE COAT, SAID COAT HAVING BEEN PRODUCED BY HEATING A MIXTURE COMPRISING 74 TO 84 BY WEIGHT OF A BRANCHED POLYETHER HAVING TERMINAL HYDROXYL GROUPS PRODUCED FROM PROPYLENE OXIDE AND TRIMETHYLOL PROPANE, WITH A MEAN MOLECULAR WEIGHT OF ABOUT 3000 AND A HYDROXYL NUMBER OF ABOUT 56; 17.8 TO 19 PARTS BY WEIGHT OF AN ALIPHATIC DIISOCYANATE WITH AN AVERAGE OF ABOUT 36 CARBON ATOMS, AN EQUIVALENT WEIGHT OF ABOUT 300, AND AN ISOCYANATE CONTENT OF ABOUT 4%; AND 0.3 TO 0.7 PARTS BY WEIGHT OF AN ORGANOMETALLIC CATALYST.
Claim 2
Dependent Claim
106 words
A SELF-ADHESIVE WEB OR SHEET MATERIAL, WHICH COMPRISES A BASE SHEET WHICH IS LAMINATED WITH A POLYURETHANE-BASED, SELF-ADHESIVE COAT, SAID COAT HAVING BEEN PRODUCED BY HEATING A MIXTURE COMPRISING 74 TO 84 BY WEIGHT OF A BRANCHED POLYETHER HAVING TERMINAL HYDROXYL GROUPS PRODUCED FROM PROPYLENE OXIDE AND TRIMETHYLOL PROPANE, WITH A MEAN MOLECULAR WEIGHT OF ABOUT 3000 AND A HYDROXYL NUMBER OF ABOUT 56; 17.8 TO 19 PARTS BY WEIGHT OF AN ALIPHATIC DIISOCYANATE WITH AN AVERAGE OF ABOUT 36 CARBON ATOMS, AN EQUIVALENT WEIGHT OF ABOUT 300, AND AN ISOCYANATE CONTENT OF ABOUT 4%; AND 0.3 TO 0.7 PARTS BY WEIGHT OF AN ORGANOMETALLIC CATALYST.
Claim 3
Dependent Claim
21 words
The material according to claim 1 wherein the mixture further comprises 0.5 to 2.0 parts by weight of an aging preventative.
Claim 4
Dependent Claim
22 words
The material of claim 1 in which the mixture further comprises a resin to increase the adhesive power of the self-adhesive coat.
Claim 5
Dependent Claim
13 words
The material of claim 1 in which the mixture further comprises a filler.
Claim 6
Dependent Claim
25 words
The material of claim 1 in which the base sheet comprises polyethylene-coated paper and the self-adhesive coat is applied to the surface of the polyethylEne.
Claim 7
Dependent Claim
35 words
The material of claim 1 in which the base sheet comprises polyethylene-coated paper, having a coat of an alkyd resin on the polyethylene surface, and the self-adhesive coat is applied to the alkyd resin coat.
References Cited (Backward Citations)
US2929800A
Cited
US3119792A
Cited
US3168497A
Cited
US3259507A
Cited
US3482683A
Cited
US3437622A
Cited
US3642044A
Cited
US3684639A
Cited
US3695918A
Cited
US3767040A
Cited
US3773857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |