Patent US5039856A successfully refreshed from Google Patents.
Patent US3916074A successfully refreshed from Google Patents.
US3916074A
Expired / Lapsed
US
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Making laminated safety glasses including layers of amorphous polyamides
Assignee: Dynamit Nobel AG
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Filing: 1973-08-03
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Granted: 1975-10-28
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Expires: 1993-08-03
Abstract
Abstract In the production of laminated glass including an amorphous polyamide layer bonded to another layer, the improvement which comprises covering the polyamide layer with a lacquer resulting from addition or condensation of reactive materials, e.g. a hydroxy-containing polyester or acrylate resin cross-linked with melamine or a polyisocyanate.
Inventors
- 👤 Wilhelm Knackstedt
- 👤 Rolf Beckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:14
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10165; B32B17/1033; B32B17/1055; B32B17/10697; B32B17/10724; B32B17/1077; B32B17/10807; B32B17/10816; B32B2307/00; B32B2307/70; B32B2307/702; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31623; Y10T428/31627; Y10T428/3163; Y10T428/31725; Y10T428/31736; Y10T428/3175; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
IN THE PRODUCTION OF A SAFETY LAMINATE WHEREIN A TRANSPARENT SHEET IS BONDED TO AN AMORPHOUS POLYAMIDE SHEET, THE IMPROVEMENT WHICH COMPRISES COVERING THE POLYAMIDE SHEET WITH A LACQUER COMPRISING A POLYMER SELECTED FROM THE GROUP CONSISTING OF AN ADDITION PRODUCT OF AN ISOCYANATE WITH A COMPOUND CONTAINING LABILE HYDROGEN ATOMS, AND A POLYFUNCTIONAL HYDROXYL GROUP-CONTAINING ACRYLATE RESIN CROSS-LINKED WITH MALAMINE RESINS OR POLYISOCYNATES, AND PRESSING THE LACQUER-COATED POLYAMIDE SHEET BETWEEN SURFACES OF THE HIGHEST OPTICAL QUALITY TO UMPART THERETO A SURFACE OF THE HIGHEST OPTICAL QUALITY PRIOR TO BONDING SAID POLYAMIDE SHEET TO SAID TRANSPARENT SHEET.
Claim 2
Dependent Claim
97 words
IN THE PRODUCTION OF A SAFETY LAMINATE WHEREIN A TRANSPARENT SHEET IS BONDED TO AN AMORPHOUS POLYAMIDE SHEET, THE IMPROVEMENT WHICH COMPRISES COVERING THE POLYAMIDE SHEET WITH A LACQUER COMPRISING A POLYMER SELECTED FROM THE GROUP CONSISTING OF AN ADDITION PRODUCT OF AN ISOCYANATE WITH A COMPOUND CONTAINING LABILE HYDROGEN ATOMS, AND A POLYFUNCTIONAL HYDROXYL GROUP-CONTAINING ACRYLATE RESIN CROSS-LINKED WITH MALAMINE RESINS OR POLYISOCYNATES, AND PRESSING THE LACQUER-COATED POLYAMIDE SHEET BETWEEN SURFACES OF THE HIGHEST OPTICAL QUALITY TO UMPART THERETO A SURFACE OF THE HIGHEST OPTICAL QUALITY PRIOR TO BONDING SAID POLYAMIDE SHEET TO SAID TRANSPARENT SHEET.
Claim 3
Dependent Claim
19 words
Process according to claim 1 wherein said lacquer comprises an addition product of an isocyanate with a hydroxy-containing polyester.
Claim 4
Dependent Claim
21 words
Process according to claim 1, wherein said resin comprises a hydroxYl group-containing acrylate resin cross-linked with a melamine resin or polyisocyanate.
Claim 5
Dependent Claim
34 words
Process according to claim 1, wherein said polyamide shut is bonded to said transparent sheet by plasticized polyvinyl butyral, and the resulting laminate is pressed between plane surfaces to form an optically acceptable product.
Claim 6
Dependent Claim
13 words
Process according to claim 1, wherein said lacquer is set by heat treatment.
Claim 7
Dependent Claim
10 words
A safety laminate produced by the process of claim 1.
References Cited (Backward Citations)
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |