US3884865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticized polyvinyl butyral interlayers
Assignee: Monsanto Co
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Filing: 1973-06-18
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Granted: 1975-05-20
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Expires: 1993-06-18
Abstract
Abstract Disclosed herein are polyvinyl butyral resins having a polyvinyl alcohol content in the range of from 12 to 20% by weight which are plasticized with from 15 to 45 parts by weight of dihexyl adipate per hundred parts of polyvinyl butyral resin. The plasticized resins are especially useful as the interlayer in laminated safety glass in architectural and vehicle applications.
Inventors
- 👤 Robert H Fariss
- 👤 James A Snelgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/30; B32B27/306; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B27/18; B32B27/22; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/54; B32B2307/70; B32B2307/718; B32B2329/00; B32B2329/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A POLYVINYL BUTYRAL INTERLAYER FOR LAMINATED SAFETY GLASS HAVING A MOLECULAR WEITHT IN THE RANGE OF FROM 30,000 TO 600,000, FROM 0 TO 10% BY WEIGHT RESIDUAL ESTER GROUPS, CALULATED AS POLYVINYL ESTER, AND A HYDROXYL CONTENT IN THE RANGE OF FROM 12 TO 20% BY WEIGHT CALCULATED AS POLYVINYL ALCOHOL WHICH IS PLASTICIZED WITH FROM 15 TO 45 PARTS BY WEIGHT OF DIHEXYL ADIPATE PER HUNDRED PARTS OF POLYVINYL BUTYRAL RESIN; WHEREIN THE SUM OF (A) 3.2 TIMES THE PERCENT POLYVINYL ALCOHOL CONTENT AND (B) THE PARTS OF PLASTICIZER PER HUNDRED PARTS OF RESIN IS EQUAL TO OR LESS THAN 100; AND WHEREIN THE PLASTICIZES INTERLAYER HAS A 100% TENSILE MODULUS AT 72*C. IN THE RANGE OF FROM 100 TO 1000 PSI.
Claim 2
Dependent Claim
123 words
A POLYVINYL BUTYRAL INTERLAYER FOR LAMINATED SAFETY GLASS HAVING A MOLECULAR WEITHT IN THE RANGE OF FROM 30,000 TO 600,000, FROM 0 TO 10% BY WEIGHT RESIDUAL ESTER GROUPS, CALULATED AS POLYVINYL ESTER, AND A HYDROXYL CONTENT IN THE RANGE OF FROM 12 TO 20% BY WEIGHT CALCULATED AS POLYVINYL ALCOHOL WHICH IS PLASTICIZED WITH FROM 15 TO 45 PARTS BY WEIGHT OF DIHEXYL ADIPATE PER HUNDRED PARTS OF POLYVINYL BUTYRAL RESIN; WHEREIN THE SUM OF (A) 3.2 TIMES THE PERCENT POLYVINYL ALCOHOL CONTENT AND (B) THE PARTS OF PLASTICIZER PER HUNDRED PARTS OF RESIN IS EQUAL TO OR LESS THAN 100; AND WHEREIN THE PLASTICIZES INTERLAYER HAS A 100% TENSILE MODULUS AT 72*C. IN THE RANGE OF FROM 100 TO 1000 PSI.
Claim 3
Dependent Claim
15 words
A polyvinyl butyral interlayer as in claim 1 wherein the adipate plasticizer is di-n-hexyl adipate.
Claim 4
Dependent Claim
17 words
A polyvinyl butyral interlayer as in claim 1 wherein the adipate plasticizer is a branched hexyl adipate.
Claim 5
Dependent Claim
23 words
A polyvinyl butyral interlayer as in claim 1 wherein the adipate plasticizer is a mixed ester of n-hexyl adipate and branched hexyl adipate.
Claim 6
Dependent Claim
22 words
A polyvinyl butyral interlayer as in claim 1 wherein the polyvinyl butyral resin has a residual ester content of less than 3%.
Claim 7
Dependent Claim
26 words
A polyvinyl butyral interlayer as in claim 5 wherein the polyvinyl butyral resin has a hydroxyl content in the range of 16.5 to 19.5% by weight.
Claim 8
Dependent Claim
29 words
A polyvinyl butyral interlayer as in claim 6 wherein the amount of plasticizer used is in the range of from 25 to 40 parts per hundred parts of resin.
Claim 9
Dependent Claim
22 words
A polyvinyl butyral interlayer as in claim 7 having a 100% tensile modulus in the range of from 200 to 800 psi.
Claim 10
Dependent Claim
123 words
A polyvinyl butyral interlayer for use in laminated safety glass having a molecular weight in the range of from 45,000 to 250,000, from 0 to 3% by weight residual acetate groups, calculated as by vinyl acetate, and a hydroxy content in the range of from 16.5 to 19.5% by weight calculated as polyvinyl alcohol which is plasticized with from 25 to 40 parts by weight of dihexyl adipate per hundred parts of polyvinyl butyral resin, wherein the sum of (a) 3.2 times the percent polyvinyl alcohol content and (b) the parts of plasticizer per hundred parts of resin is equal to or less than 100 and wherein the interlayer has a 100% tensile modulus in the range of from 200 to 800 psi.
Claim 11
Dependent Claim
123 words
A polyvinyl butyral interlayer for use in laminated safety glass having a molecular weight in the range of from 45,000 to 250,000, from 0 to 3% by weight residual acetate groups, calculated as by vinyl acetate, and a hydroxy content in the range of from 16.5 to 19.5% by weight calculated as polyvinyl alcohol which is plasticized with from 25 to 40 parts by weight of dihexyl adipate per hundred parts of polyvinyl butyral resin, wherein the sum of (a) 3.2 times the percent polyvinyl alcohol content and (b) the parts of plasticizer per hundred parts of resin is equal to or less than 100 and wherein the interlayer has a 100% tensile modulus in the range of from 200 to 800 psi.
Claim 12
Dependent Claim
15 words
A polyvinyl butyral interlayer as in claim 9 wherein the adipate plasticizer is di-n-hexyl adipate.
Claim 13
Dependent Claim
17 words
A polyvinyl butyral interlayer as in claim 9 wherein the adipate plasticizer is a branched hexyl adipate.
Claim 14
Dependent Claim
23 words
A polyvinyl butyral interlayer as in claim 9 wherein the adipAte plasticizer is a mixed ester of n-hexyl adipate and branched hexyl adipate.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |