US4533601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylbutyral films which contain plasticizer and have a reduced adhesive power on glass
Assignee: Hoechst AG
•
Filing: 1984-01-31
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Granted: 1985-08-06
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Expires: 2004-01-31
Abstract
Abstract The reduction of the adhesion to glass of thermoplastic polyvinylbutyral molding compositions, in particular films, which contain plasticizer and in which the polyvinylbutyral component has an increased content of vinyl alcohol units, by addition of a combination of potassium hydroxide, potassium formate or potassium acetate and a compound having a betaine structure, as the anti-adhesive agent. Use of the films with reduced adhesion to glass as the bonding layer for the production of glass laminates.
Inventors
- 👤 Hans D. Hermann
- 👤 Klaus Fabian
- 👤 Joachim Ebigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:45
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10688; B32B17/10761; B32B27/00; B32B27/18; B32B27/22; B32B27/30; B32B27/306; C08K; C08K5/00; C08K5/0008; C08K5/04; C08K5/09; C08K5/098; C08K5/16; C08K5/17; C08K5/19; B32B2307/00; B32B2307/70; B32B2307/718; B32B2307/746; B32B2329/00; B32B2329/04; B32B2329/06; C08J2329/00; C08J2329/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A method of reducing adhesion to glass of a thermoplastic polyvinylbutyral molding composition, which contains plasticizer and in which the polyvinylbutyral component contains 21-28% by weight of vinyl alcohol units (based on the polyvinylbutyral), by mixing constituents of the molding composition with an anti-adhesive agent combination of (a) potassium hydroxide, potassium formate or potassium acetate in an amount corresponding to an alkali titer of between 10 and 200 (based on the polyvinylbutyral) and (b) 0.005 to 0.5% by weight (based on the polyvinylbutyral) of a compound having a betaine structure.
Claim 2
Independent Claim
90 words
A method of reducing adhesion to glass of a thermoplastic polyvinylbutyral molding composition, which contains plasticizer and in which the polyvinylbutyral component contains 21-28% by weight of vinyl alcohol units (based on the polyvinylbutyral), by mixing constituents of the molding composition with an anti-adhesive agent combination of (a) potassium hydroxide, potassium formate or potassium acetate in an amount corresponding to an alkali titer of between 10 and 200 (based on the polyvinylbutyral) and (b) 0.005 to 0.5% by weight (based on the polyvinylbutyral) of a compound having a betaine structure.
Claim 3
Dependent Claim
22 words
The method as claimed in claim 1, wherein component (b) is a betaine, sulfobetaine or phosphobetaine or a mixture of these compounds.
Claim 4
Dependent Claim
14 words
The method as claimed in claim 1, wherein the molding composition is a film.
Claim 5
Dependent Claim
20 words
A polyvinylbutyral film which contains a plasticizer, has reduced adhesion to glass and is produced as claimed in claim 3.
Claim 6
Dependent Claim
27 words
The use of a polyvinylbutyral film, as claimed in claim 1, which contains a plasticizer and has reduced adhesion to glass, for production of a glass laminate.
Claim 7
Dependent Claim
26 words
A glass laminate containing a polyvinylbutyral film, as claimed in claim 1, which contains a plasticizer and has reduced adhesion to glass, as the bonding layer.
Claim 8
Dependent Claim
100 words
A plasticizer-containing thermoplastic polyvinylbutyral molding composition having reduced adhesion to glass, having a polyvinylbutyral component with from 21 to 28 percent by weight of vinyl alcohol units (based on the polyvinylbutyral) and wherein constituents of the molding composition are in admixture with an anti-adhesive agent combination of: (a) a member selected from the group consisting of potassium hydroxide, potassium formate and potassium acetate in an amount corresponding to an alkali titer of between 10 and 200 (based on the polyvinylbutyral) and (b) from 0.005 to 0.5 percent by weight (based on the polyvinylbutyral) of a compound having a betaine structure.
Claim 9
Dependent Claim
100 words
A plasticizer-containing thermoplastic polyvinylbutyral molding composition having reduced adhesion to glass, having a polyvinylbutyral component with from 21 to 28 percent by weight of vinyl alcohol units (based on the polyvinylbutyral) and wherein constituents of the molding composition are in admixture with an anti-adhesive agent combination of: (a) a member selected from the group consisting of potassium hydroxide, potassium formate and potassium acetate in an amount corresponding to an alkali titer of between 10 and 200 (based on the polyvinylbutyral) and (b) from 0.005 to 0.5 percent by weight (based on the polyvinylbutyral) of a compound having a betaine structure.
Claim 10
Dependent Claim
11 words
A molding composition as claimed in claim 7 in film form.
Claim 11
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (a) is potassium hydroxide.
Claim 12
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (a) is potassium formate.
Claim 13
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (a) is potassium acetate.
Claim 14
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (b) is a betaine.
Claim 15
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (b) is a sulfobetaine.
Claim 16
Dependent Claim
14 words
A molding composition as claimed in claim 8 wherein component (b) is a phosphobetaine.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |