US4087392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of pressure-sensitive adhesives
Assignee: BASF SE
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Filing: 1975-07-03
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Granted: 1978-05-02
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Expires: 1995-07-03
Abstract
Abstract Pressure-sensitive adhesives are manufactured by reacting a mixture of A from 10 to 90% by weight of a polyol having a molecular weight of from 300 to 8,000 and a hydroxyl number of from 20 to 85 and B from 5 to 60% by weight of an amorphous thermoplastic tackifier resin having a softening point of from 40° to 140° C and a molecular weight of from 200 to 7,500, with C from 5 to 30% by weight of a polyisocyanate masked with CH-acidic compounds, The percentages by weight being based on the total weight of components (a), (b) and (c).
Inventors
- 👤 Heinrich Hartmann
- 👤 Wolfgang Druschke
- 👤 Klaus Eisentraeger
- 👤 Helmut Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8093; C09; C09J; C09J175/00; C09J175/04; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A process for the manufacture of pressure-sensitive adhesive, in which a. from 10 to 90% by weight of a polyol having a molecular weight of from 300 to 8,000 and a hydroxyl number of from 20 to 85 and b. from 5 to 60% by weight of an amorphous, thermoplastic tackifier having a softening point between 40 and 140° C and a molecular weight between 200 and 7,500, are mixed together and the mixture is reacted with c. from 5 to 30% by weight of a polyisocyanate masked with CH acidic compounds, the percentages being based on the total weight of components (a), (b) and (c).
Claim 2
Dependent Claim
106 words
A process for the manufacture of pressure-sensitive adhesive, in which a. from 10 to 90% by weight of a polyol having a molecular weight of from 300 to 8,000 and a hydroxyl number of from 20 to 85 and b. from 5 to 60% by weight of an amorphous, thermoplastic tackifier having a softening point between 40 and 140° C and a molecular weight between 200 and 7,500, are mixed together and the mixture is reacted with c. from 5 to 30% by weight of a polyisocyanate masked with CH acidic compounds, the percentages being based on the total weight of components (a), (b) and (c).
Claim 3
Dependent Claim
134 words
A process for the manufacture of pressure-sensitive adhesives, in which a. from 30 to 70% by weight of a polyol having a molecular weight of from 1,800 to 5,200 and a hydroxyl number of from 25 to 70 and b. from 25 to 50% by weight of an amorphous, thermoplastic tackifier having a softening point between 40° and 140° C and a molecular weight between 200 and 7,500 and an acid number below 100 are mixed together and the mixture is reacted with c. from 5 to 20% by weight of a reaction product of a CH acidic compound selected from the group consisting of acetyl acetates of C 1-4 alkanols and malonates of C 1-4 alkanols with isophorone diisocyante, the percentages being based on the total weight of components (a), (b) and (c).
Claim 4
Dependent Claim
134 words
A process for the manufacture of pressure-sensitive adhesives, in which a. from 30 to 70% by weight of a polyol having a molecular weight of from 1,800 to 5,200 and a hydroxyl number of from 25 to 70 and b. from 25 to 50% by weight of an amorphous, thermoplastic tackifier having a softening point between 40° and 140° C and a molecular weight between 200 and 7,500 and an acid number below 100 are mixed together and the mixture is reacted with c. from 5 to 20% by weight of a reaction product of a CH acidic compound selected from the group consisting of acetyl acetates of C 1-4 alkanols and malonates of C 1-4 alkanols with isophorone diisocyante, the percentages being based on the total weight of components (a), (b) and (c).
Claim 5
Dependent Claim
24 words
A process as claimed in claim 2, wherein the polyol (a) used is a polyetherol having a hydroxyl number of from 30 to 50.
Claim 6
Dependent Claim
24 words
A process as claimed in claim 2, wherein the polyol (a) used is a polyesterol having a hydroxyl number of from 35 to 50.
Claim 7
Dependent Claim
26 words
A process as claimed in claim 2, wherein the polyol (a) used is a hydroxyl-containing acrylate copolymer having a molecular weight of from 2,000 to 5,000.
Claim 8
Dependent Claim
45 words
A process as claimed in claim 2, wherein the mixture of components (a) and (b) is reacted with components (c) at from 110° to 180° C, from 0.6 to 1.4 masked isocyanate groups of component (c) being used for every hydroxyl group of component (a).
Claim 9
Dependent Claim
46 words
A process as claimed in claim 2, wherein the components (a) and (b) are mixed at from 40° to 160° C, the component (c) is added at from 50° to 80° C and the resulting mixture is shaped and heated to from 110° to 180° C.
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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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |