US4292372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylbutyral sheeting
Assignee: EIDP Inc
•
Filing: 1980-06-02
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Granted: 1981-09-29
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Expires: 2000-06-02
Abstract
Abstract Polyvinylbutyral sheeting, plasticized with a hydrolyzable ester, having low acid concentration through the use of formic acid salt as an adhesion control agent.
Inventors
- 👤 Robert E. Moynihan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:08
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10605; B32B17/10688; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/10; C08K5/101; C08K5/103; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
In a PVB sheet plasticized with a compatible quantity of hydrolyzable ester selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethylene glycol di-n-heptanoate, and containing an adhesion control agent, the improvement wherein the adhesion control agent comprises an alkali or alkaline earth metal formate and the sheet has an acid concentration of less than about 10 equivalents of acid per million parts of sheet.
Claim 2
Dependent Claim
65 words
In a PVB sheet plasticized with a compatible quantity of hydrolyzable ester selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethylene glycol di-n-heptanoate, and containing an adhesion control agent, the improvement wherein the adhesion control agent comprises an alkali or alkaline earth metal formate and the sheet has an acid concentration of less than about 10 equivalents of acid per million parts of sheet.
Claim 3
Dependent Claim
28 words
A plasticized PVB sheet of claim 1 wherein the metal formate is present in an amount of about from 50 to 1500 parts per million parts of sheeting.
Claim 4
Dependent Claim
29 words
A plasticized PVB sheet of claim 1 wherein the metal formate is selected from at least one of the group consisting of potassium formate, magnesium formate, and calcium formate.
Claim 5
Dependent Claim
31 words
A plasticized PVB sheet of claim 3 wherein the metal formate consists essentially of potassium formate in an amount of about from 400 to 1500 parts per million parts of sheeting.
Claim 6
Dependent Claim
37 words
A plasticized PVB sheet of claim 3 wherein the metal formate is selected from the group consisting of magnesium formate and calcium formate in an amount of about from 50 to 500 parts per million of sheeting.
Claim 7
Dependent Claim
15 words
A plasticized PVB sheet of claim 1 wherein the plasticizer consists essentially of tetraethyleneglycol di-n-heptanoate.
Claim 8
Dependent Claim
15 words
A plasticized PVB sheet of claim 1 wherein the plasticizer consists essentially of triethyleneglycol di-n-heptanoate.
Claim 9
Dependent Claim
81 words
In a laminar structure comprising at least one layer of glass and a sheet of polyvinyl butyral plasticized with a compatible quantity of at least one hydrolyzable ester selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethyleneglycol di-n-heptanoate, the improvement wherein the polyvinylbutyral comprises at least one adhesion control agent selected from alkali and alkaline earth metal formates and the polyvinyl butyral sheet has an acid concentration of less than about 10 equivalents of acid per million parts of sheet.
Claim 10
Dependent Claim
81 words
In a laminar structure comprising at least one layer of glass and a sheet of polyvinyl butyral plasticized with a compatible quantity of at least one hydrolyzable ester selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethyleneglycol di-n-heptanoate, the improvement wherein the polyvinylbutyral comprises at least one adhesion control agent selected from alkali and alkaline earth metal formates and the polyvinyl butyral sheet has an acid concentration of less than about 10 equivalents of acid per million parts of sheet.
Claim 11
Dependent Claim
104 words
In a process for the preparation of PVB sheet by blending polyvinylbutyral, a compatible quantity of at least one hydrolyzable ester plasticizer selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethyleneglycol di-n-heptanoate and an adhesion control agent, and extruding the blend to form a sheet, the improvement which comprises adding to the blend, as an adhesion control agent, about from 50 to 1500 parts, per million parts of sheeting, of at least one alkali or alkaline earth metal formate in an amount to provide on acid concentration in the sheet of less than about 10 equivalents of acid per million parts of sheet.
Claim 12
Dependent Claim
104 words
In a process for the preparation of PVB sheet by blending polyvinylbutyral, a compatible quantity of at least one hydrolyzable ester plasticizer selected from the group consisting of triethyleneglycol di-n-heptanoate and tetraethyleneglycol di-n-heptanoate and an adhesion control agent, and extruding the blend to form a sheet, the improvement which comprises adding to the blend, as an adhesion control agent, about from 50 to 1500 parts, per million parts of sheeting, of at least one alkali or alkaline earth metal formate in an amount to provide on acid concentration in the sheet of less than about 10 equivalents of acid per million parts of sheet.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |