US3841890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizer systems for polyvinyl butyral interlayers
Assignee: Monsanto Co
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Filing: 1972-12-07
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Granted: 1974-10-15
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Expires: 1992-12-07
Abstract
Abstract Disclosed herein are plasticizer systems for polyvinyl butyral interlayers used in laminated safety glass. The plasticizer system is a blend of a phosphate plasticizer and a diester of an alipahtic dicarboxylic acid wherein the diester contains from 14 to 28 carbon atoms. The blend allows the use of many phosphate and diester plasticizers which are unsuitable when used alone.
Inventors
- 👤 A Coaker
- 👤 J Darby
- 👤 T Mathis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10293; B32B17/10302; B32B17/1055; B32B17/10605; B32B17/10761; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A PLASTICIZER SYSTEM FOR POLYVINYL BUTYRAL INTERLAYERS USED IN LAMINATED SAFETY GLASS WHICH PLASTICIZER SYSTEM COMPRISES A BLEND OF (1) AT LEAST ONE PHOSPHATE PLASTICIZER AND (2) AT LEAST ONE ADIPATE PLASTICIZER, WHEREIN THE PHOSPHATE PLASTICIZER CORRESPONDS TO THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
42 words
A PLASTICIZER SYSTEM FOR POLYVINYL BUTYRAL INTERLAYERS USED IN LAMINATED SAFETY GLASS WHICH PLASTICIZER SYSTEM COMPRISES A BLEND OF (1) AT LEAST ONE PHOSPHATE PLASTICIZER AND (2) AT LEAST ONE ADIPATE PLASTICIZER, WHEREIN THE PHOSPHATE PLASTICIZER CORRESPONDS TO THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
15 words
A plasticizer system as in claim 1 wherein the phosphate plasticizer is is tri-2-ethylhexyl phosphate.
Claim 4
Dependent Claim
15 words
A plasticizer system as in claim 1 wherein the phosphate plasticizer is 2-ethylhexyl diphenyl phosphate.
Claim 5
Dependent Claim
15 words
A plasticizer system as in claim 1 wherein the phosphate plasticizer is cresyl diphenyl phosphate.
Claim 6
Dependent Claim
13 words
A plasticizer system as in claim 2 wherein the adipate is dihexyl adipate.
Claim 7
Dependent Claim
14 words
A plasticizer system as in claim 3 wherein the adipate is a C7-C9 adipate.
Claim 8
Dependent Claim
68 words
A plasticizer system as in claim 1 wherein the phosphate plasticizer is selected from the group consisting of tri-2-ethylhexyl phosphate, 2-ethylhexyl diphenyl phosphate, tricresyl phosphate, tributoxyethyl phosphate, dodecyl diphenyl phosphate and cresyl diphenyl phosphate; and wherein the adipate plasticizer is selected from the group consisting of dihexyl adipates and C7-C9 adipates prepared from adipic acid and a mixture of straight chain and branched chain heptyl and nonyl alcohols.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |