US4046951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated transparent assembly with edge sealing means
Assignee: PPG Industries Inc
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Filing: 1976-11-01
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Granted: 1977-09-06
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Expires: 1996-11-01
Abstract
Abstract This invention relates to laminated transparent assemblies having novel composite edge sealing means of organic composition consisting essentially of a thin barrier layer of an organofluoro composition selected from the class consisting of fluorinated ethylene polymers and copolymers of fluorinated ethylene and fluorinated propylene having a high resistance to moisture penetration and a sealant layer and/or a cushion coat selected from the class consisting of polysulfides, silicones and fluorosilicones having an adhesive bond to the transparent lamina of the laminated transparent assembly and to the barrier layer and some moisture resistant properties to provide a composite edge seal that is suitably adhered to the marginal edge of the laminated transparent assembly.
Inventors
- 👤 John E. Stefanik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10018; B32B17/10165; B32B17/10293; B32B17/10302; B32B17/1055; B32B17/10761; B32B17/1077; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; B32B17/10853; B32B3/00; B32B3/02; E; E06; E06B; E06B7/00; E06B7/28; B32B2307/00; B32B2307/40; B32B2307/412; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/24777; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31507; Y10T428/3154; Y10T428/31551; Y10T428/31573; Y10T428/31598; Y10T428/31601; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
183 words
A laminated transparency comprising two transparent layers of rigid material selected from the class consisting of glass, polycarbonates, acrylic plastics and other rigid transparent plastics commonly used as a substitute for glass bonded together by an interlayer of given thickness composed of a material selected from the class consisting of polyvinyl acetals and polyurethanes, a composite edge sealing system comprising a thin barrier layer of a fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene having a width greater than the thickness of said interlayer and bonded to the edge of said interlayer completely around the perimeter thereof and completely covering said edge of said interlayer and a sealant layer having greater adhesion to the edge of said transparency than said barrier layer and composed of a composition selected from the class consisting of polysulfides, silicones and fluorosilicones at least coextensive in width with said barrier layer bonding said barrier layer to said transparency in such a manner as to improve the strength of the bond between said barrier layer and the edge of said interlayer.
Claim 2
Dependent Claim
183 words
A laminated transparency comprising two transparent layers of rigid material selected from the class consisting of glass, polycarbonates, acrylic plastics and other rigid transparent plastics commonly used as a substitute for glass bonded together by an interlayer of given thickness composed of a material selected from the class consisting of polyvinyl acetals and polyurethanes, a composite edge sealing system comprising a thin barrier layer of a fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene having a width greater than the thickness of said interlayer and bonded to the edge of said interlayer completely around the perimeter thereof and completely covering said edge of said interlayer and a sealant layer having greater adhesion to the edge of said transparency than said barrier layer and composed of a composition selected from the class consisting of polysulfides, silicones and fluorosilicones at least coextensive in width with said barrier layer bonding said barrier layer to said transparency in such a manner as to improve the strength of the bond between said barrier layer and the edge of said interlayer.
Claim 3
Dependent Claim
36 words
A laminated transparency as in claim 1, further including a cushion coat of an adhesive composition selected from the class consisting of polysulfides, fluorosilicones and silicones superimposed over said barrier layer and over said sealant layer.
Claim 4
Dependent Claim
45 words
A laminated transparency as in claim 1, wherein said sealant layer has at least a portion thereof interposed between said thin barrier layer and the edge of said interlayer, said interposed portion of said sealant layer being thinner than the thickness of said barrier layer.
Claim 5
Dependent Claim
23 words
A laminated transparency as in claim 3, wherein said barrier layer has a thickness of 2 to 5 mils (0.05 to 0.13 millimeter).
Claim 6
Dependent Claim
13 words
A laminated transparency as in claim 1, wherein said barrier layer is polytetrafluoroethylene.
Claim 7
Dependent Claim
18 words
A laminated transparency as in claim 1, wherein said barrier layer is a copolymer of tetrafluoroethylene and hexafluoropropylene.
Claim 8
Dependent Claim
48 words
A laminated transparency as in claim 5, wherein said barrier layer is in direct contact with said interlayer and has its surface treated with a tetrahydrofurane solution of an alkali metal addition compound to improve the adhesive properties of said barrier layer to the edge of said interlayer.
Claim 9
Dependent Claim
42 words
A laminated transparency as in claim 6, wherein said barrier layer is in direct contact with said interlayer and has its surface treated with a tetrahydrofurane solution of an alkali metal addition compound to improve the adhesive properties of said barrier layer.
Claim 10
Independent Claim
215 words
A method of forming a laminated transparency comprising two transparent sheets of rigid transparent material selected from the class consisting of glass, polycarbonates, acrylic resins and other rigid organic materials usually substituted for glass, bonded together by an interlayer composed of a material selected from the class consisting of plasticized polyvinyl acetals and polyurethanes and a composite edge sealing system comprising a thin barrier layer of an organic fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene comprising assembling said rigid sheets and said interlayer to form a sandwich, enclosing the entire marginal edge of said interlayer within a tape of said organic fluorinated polymer, enclosing the periphery of said sandwich and said tape within a cushion layer of a composition selected from the class consisting of silicones and fluorosilicones adherent to said tape and to said rigid transparent material to form an assembly, inserting said assembly in a bag, evacuating and sealing the bag, and subjecting said bag and said assembly to an elevated temperature and pressure sufficient to seal said barrier layer to the marginal portion of said interlayer and to bond said rigid sheets to the opposite surfaces of said interlayer and to bond said cushion layer to said barrier layer and said rigid sheets.
Claim 11
Independent Claim
215 words
A method of forming a laminated transparency comprising two transparent sheets of rigid transparent material selected from the class consisting of glass, polycarbonates, acrylic resins and other rigid organic materials usually substituted for glass, bonded together by an interlayer composed of a material selected from the class consisting of plasticized polyvinyl acetals and polyurethanes and a composite edge sealing system comprising a thin barrier layer of an organic fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene comprising assembling said rigid sheets and said interlayer to form a sandwich, enclosing the entire marginal edge of said interlayer within a tape of said organic fluorinated polymer, enclosing the periphery of said sandwich and said tape within a cushion layer of a composition selected from the class consisting of silicones and fluorosilicones adherent to said tape and to said rigid transparent material to form an assembly, inserting said assembly in a bag, evacuating and sealing the bag, and subjecting said bag and said assembly to an elevated temperature and pressure sufficient to seal said barrier layer to the marginal portion of said interlayer and to bond said rigid sheets to the opposite surfaces of said interlayer and to bond said cushion layer to said barrier layer and said rigid sheets.
Claim 12
Dependent Claim
44 words
The method as in claim 9, further including the step of treating the surfaces of said tape with a tetrahydrofurane solution of an alkali metal addition compound to improve the adhesive properties of said tape prior to enclosing said marginal edge with said tape.
Claim 13
Independent Claim
224 words
A method of forming a laminated transparency comprising two transparent sheets of rigid transparent material selected from the class consisting of glass, polycarbonates, acrylic resins and other rigid organic materials usually substituted for glass, bonded together by an interlayer composed of a material selected from the class consisting of plasticized polyvinyl acetals and polyurethanes and composite edge sealing system comprising a thin barrier layer of an organic fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene extending around the edge of said transparency comprising assembling said rigid sheets and said interlayer to form an assembly, inserting said assembly in a bag, evacuating and sealing the bag, and subjecting said bag and said assembly to an elevated temperature and pressure sufficient to bond said rigid sheets to the opposite surfaces of said interlayer to form a laminated assembly, removing said laminated assembly from said bag, applying a sealant layer of a composition selected from the class of silicone rubbers and polysulfides that cure at room temperature to the marginal edge of said laminated assembly that results from said exposure to elevated temperature and pressure, applying a tape of said oganic fluorinated polymer around the entire marginal edge of said laminated assembly in alignment with the edge of said interlayer, and curing the assembly that results at room temperature.
Claim 14
Independent Claim
224 words
A method of forming a laminated transparency comprising two transparent sheets of rigid transparent material selected from the class consisting of glass, polycarbonates, acrylic resins and other rigid organic materials usually substituted for glass, bonded together by an interlayer composed of a material selected from the class consisting of plasticized polyvinyl acetals and polyurethanes and composite edge sealing system comprising a thin barrier layer of an organic fluorinated polymer selected from the class consisting of fluoroethylene polymers and copolymers of fluoroethylene and fluoropropylene extending around the edge of said transparency comprising assembling said rigid sheets and said interlayer to form an assembly, inserting said assembly in a bag, evacuating and sealing the bag, and subjecting said bag and said assembly to an elevated temperature and pressure sufficient to bond said rigid sheets to the opposite surfaces of said interlayer to form a laminated assembly, removing said laminated assembly from said bag, applying a sealant layer of a composition selected from the class of silicone rubbers and polysulfides that cure at room temperature to the marginal edge of said laminated assembly that results from said exposure to elevated temperature and pressure, applying a tape of said oganic fluorinated polymer around the entire marginal edge of said laminated assembly in alignment with the edge of said interlayer, and curing the assembly that results at room temperature.
Claim 15
Dependent Claim
68 words
The method as in claim 11, wherein said sealant layer is composed of a silicone rubber comprising applying a first layer of said silicone rubber to the edge of said assembly, curing said first layer, applying a second layer of silicone rubber to said first layer of silicone rubber after curing said first layer, enclosing said tape around said second layer of silicone rubber, and curing said assembly.
Claim 16
Dependent Claim
99 words
The method as in claim 11, wherein said sealant layer is composed of a polysulfide comprising applying a first layer of polysulfide to the edge of said laminated assembly to form a sealant layer of polysulfide, applying said tape to said sealant layer to form a barrier layer and applying a second layer of polysulfide to said barrier layer to form a cushion coat of polysulfide after said laminated assembly is removed from said bag, and curing said laminated assembly with said sealant layer, barrier layer and cushion coat applied to the edge of said assembly at room temperature.
Claim 17
Dependent Claim
15 words
The method as in claim 13, wherein said polysulfide layers are cured with lead peroxide.
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |