US4137364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent laminate and adhesive film
Assignee: Monsanto Research Corp
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Filing: 1976-11-05
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Granted: 1979-01-30
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Expires: 1996-11-05
Abstract
Abstract The invention relates to transparent or optically clear laminates and adhesive films used to make these laminates having a temperature utility range far greater than those previously developed and which are especially useful for windshields of high speed aircraft which need such a broad temperature range. These transparent adhesive films have a temperature utility in the range of -65 DEG F to at least 350 DEG F in laminates and comprise an ethylene/vinyl acetate copolymer having a vinyl acetate content in the range of 40% to 60%, the copolymer being partially hydrolyzed to form a terpolymer having a hydroxyl content in the range of 1% to 6%, the terpolymer in film form and/or laminate being heat treated and cross-linked to give the adhesive film. The laminates are made from transparent layers of glass and/or plastic bound together with the transparent adhesive film.
Inventors
- 👤 George L. Ball, III
- 👤 Dennis W. Werkmeister
- 👤 Ival O. Salyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:27
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10788; B32B17/10165; B32B17/10431; B32B17/10467; B32B17/10486; B32B17/10697; B32B17/10761; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/40; B32B2307/412; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31623; Y10T428/31645; Y10T428/31649; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
An optically clear adhesive film useful in laminates comprising an ethylene/vinyl acetate/vinyl alcohol terpolymer having a hydroxyl content in the range of 1% to 6%, said terpolymer having been formed by partial hydrolysis of an ethylene/vinyl acetate copolymer having a vinyl acetate content in the range of 40% to 60%, and said terpolymer in film form having been heat treated and crosslinked by means of radiation or curing in the presence of an effective amount of a crosslinking agent selected from the group consisting of vinyl triethoxy silane and isophthaloyl biscaprolactam to give said adhesive film having a temperature utility in laminates in the range of -65° F. to at least 350° F.
Claim 2
Dependent Claim
113 words
An optically clear adhesive film useful in laminates comprising an ethylene/vinyl acetate/vinyl alcohol terpolymer having a hydroxyl content in the range of 1% to 6%, said terpolymer having been formed by partial hydrolysis of an ethylene/vinyl acetate copolymer having a vinyl acetate content in the range of 40% to 60%, and said terpolymer in film form having been heat treated and crosslinked by means of radiation or curing in the presence of an effective amount of a crosslinking agent selected from the group consisting of vinyl triethoxy silane and isophthaloyl biscaprolactam to give said adhesive film having a temperature utility in laminates in the range of -65° F. to at least 350° F.
Claim 3
Dependent Claim
37 words
An adhesive film of claim 1 wherein said ethylene/vinyl acetate copolymer has a vinyl acetate content in the range of 45% to 55% and said terpolymer has a hydroxyl content in the range of 2% to 4%.
Claim 4
Dependent Claim
28 words
An adhesive of claim 1 wherein said ethylene/vinyl acetate copolymer has a vinyl acetate content of about 50% and said terpolymer has a hydroxyl content of about 3%.
Claim 5
Dependent Claim
15 words
An adhesive of claim 1 wherein vinyl triethoxy silane was used as a crosslinking agent.
Claim 6
Dependent Claim
14 words
An adhesive of claim 1 wherein isophthaloyl biscaprolactam was used as a crosslinking agent.
Claim 7
Dependent Claim
16 words
An adhesive of claim 1 wherein said adhesive film was crosslinked by means of electron bombardment.
Claim 8
Dependent Claim
21 words
An adhesive of claim 1 wherein the heat treating was in the range of about 200° F. to about 400° F.
Claim 9
Dependent Claim
24 words
An optically clear laminate which comprises optically clear layers of glass and/or plastic bound together with an optically clear adhesive film of claim 1.
Claim 10
Dependent Claim
10 words
A laminate of claim 8 wherein said layers are glass.
Claim 11
Dependent Claim
10 words
A laminate of claim 8 wherein said layers are polycarbonate.
Claim 12
Dependent Claim
12 words
A laminate of claim 8 wherein said layers are glass and polycarbonate.
Claim 13
Dependent Claim
12 words
A laminate of claim 8 wherein said layers are polycarbonate and acrylic.
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |