US4303739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of the production of composite safety glass
Assignee: Dynamit Nobel AG
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Filing: 1979-02-22
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Granted: 1981-12-01
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Expires: 1999-02-22
Abstract
Abstract An improvement in a method for manufacturing a composite safety glass wherein one or more silicate glass panes is bonded to a plasticized synthetic resin film at an elevated temperature, the improvement residing in employing as the plasticized synthetic resin film a soft film of a polymer of ethylene and/or propylene and effecting the bonding under pressure at a temperature of at least 120° C. and up to 200° C.
Inventors
- 👤 Rolf Beckmann
- 👤 Wilhelm Knackstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:15
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/30; B32B27/306; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/1055; B32B17/10688; B32B17/10761; B32B17/10788; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31627; Y10T428/3163; Y10T428/31645; Y10T428/31649; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
203 words
In a method for manufacturing a laminated safety glass wherein at least one silicate glass sheet is bonded to a side of a plasticized synthetic resin film at an elevated temperature, the improvement wherein said plasticized synthetic resin film is a plasticized soft film of polyvinyl butyral and said plasticized film is bonded to said silicate glass sheet with a bonding agent which has been applied either to the surface of said silicate glass sheet or to the surface of said plasticized soft film, which bonding agent comprises a functional silane dissolved in a solvent and a varnish in an amount of 0.0001 and 7 percent by weight, said varnish comprising: A. The varnish containing a binder selected from the group consisting of a vinyl chloride-hydroxy alkyl acrylate copolymer, a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer, a vinyl chloride-unsaturated carboxylic acid alkyl esterunsaturated carboxylic acid copolymer and a partially saponified copolymer of vinyl chloride-vinyl acetate; and B. A non-volatile component of the group of plasticizers, stabilizers and auxiliary agents in a combined amount between 1.0 and 20 percent by weight, the bonding being performed at a temperature in the range of greater than 120° to 200° C. and the solvent is thereafter removed.
Claim 2
Dependent Claim
203 words
In a method for manufacturing a laminated safety glass wherein at least one silicate glass sheet is bonded to a side of a plasticized synthetic resin film at an elevated temperature, the improvement wherein said plasticized synthetic resin film is a plasticized soft film of polyvinyl butyral and said plasticized film is bonded to said silicate glass sheet with a bonding agent which has been applied either to the surface of said silicate glass sheet or to the surface of said plasticized soft film, which bonding agent comprises a functional silane dissolved in a solvent and a varnish in an amount of 0.0001 and 7 percent by weight, said varnish comprising: A. The varnish containing a binder selected from the group consisting of a vinyl chloride-hydroxy alkyl acrylate copolymer, a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer, a vinyl chloride-unsaturated carboxylic acid alkyl esterunsaturated carboxylic acid copolymer and a partially saponified copolymer of vinyl chloride-vinyl acetate; and B. A non-volatile component of the group of plasticizers, stabilizers and auxiliary agents in a combined amount between 1.0 and 20 percent by weight, the bonding being performed at a temperature in the range of greater than 120° to 200° C. and the solvent is thereafter removed.
Claim 3
Dependent Claim
62 words
A process according to claim 1 wherein said functional silane is a silicon organofunctional silane having the formula ##STR7## wherein R represents a hydrolyzable residue, R' represents an alkyl radical of 1 to 18 carbon atoms, A represents a bivalent alkylene radical of 1 to 10 carbon atoms which optionally can be branched, and z represents a radical containing a functional group.
Claim 4
Dependent Claim
104 words
A process according to claim 2 wherein R represents Cl or OR" wherein R" in turn represents a C 1-8 alkyl radical optionally containing oxygen or sulfur in the chain, or an acyl radical and z represents a functional group of the formula ##STR8## --C=C--, halogen, N R 2 R 3 or ##STR9## wherein R 2 is H or amino alkyl of 2-8 carbon atoms in the alkyl radical and R 3 is H or R 2 ; and R 4 is H or CH 3 or C 2 H 5 ; and n is 1 to 3, and p is 0 or 1.
Claim 5
Dependent Claim
29 words
A process according to claim 3 wherein z represents a functional group having the formula --C═C-- and said silane is employed in a mixture comprising a radical forming agent.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein said functional silane is employed by itself.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein said functional silane is employed together with another silicon functional silane.
Claim 8
Dependent Claim
19 words
A process according to claim 1 wherein said silane is employed in a solution also containing an organofunctional silane.
Claim 9
Dependent Claim
24 words
A process according to claim 1 wherein said silane is present in said solution in an amount between 0.0005 and 5.0 percent by weight.
Claim 10
Dependent Claim
21 words
A process according to claim 1 wherein the concentration of said silane in said solution is 0.05 to 7 weight percent.
Claim 11
Dependent Claim
20 words
A process according to claim 1 wherein said varnish comprises a compolymer of vinyl chloride, vinyl acetate, and maleic acid.
Claim 12
Dependent Claim
17 words
A method according to claim 1, wherein said varnish is a partially saponified vinyl chloride-vinyl acetate copolymer.
Claim 13
Dependent Claim
16 words
A method according to claim 1, wherein said varnish is a vinyl chloride-hydroxy alkyl acrylate copolymer.
Claim 14
Dependent Claim
17 words
A method according to claim 1, wherein said varnish is a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer.
Claim 15
Dependent Claim
14 words
A method according to claim 13, wherein said unsaturated carboxylic acid is acrylic acid.
Claim 16
Dependent Claim
14 words
A method according to claim 13, wherein said unsaturated carboxylic acid is methacrylic acid.
Claim 17
Dependent Claim
20 words
A method according to claim 1, wherein said varnish is a vinyl chloride-unsaturated carboxylic acid alkyl ester-unsaturated carboxylic acid copolymer.
Claim 18
Dependent Claim
118 words
A laminated safety glass comprising at least one silicate glass sheet bonded to a soft film of polyvinyl butyral by a bonding agent consisting essentially of a functional silane dissolved in a solvent and a varnish in an amount of 0.0001 and 7% by weight, said varnish comprising: A. the varnish containing a binder selected from the group consisting of a vinyl chloride hydroxy alkyl acrylate copolymer, a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer, a vinyl chloride-unsaturated carboxylic acid alkyl ester-unsaturated carboxylic acid copolymer and a partially saponified copolymer of vinyl chloride-vinyl acetate; and B. a non-volatile component of the group of plasticizers, stabilizers and auxiliary agents in a combined amount between 1.0 and 20.0 percent by weight.
Claim 19
Dependent Claim
118 words
A laminated safety glass comprising at least one silicate glass sheet bonded to a soft film of polyvinyl butyral by a bonding agent consisting essentially of a functional silane dissolved in a solvent and a varnish in an amount of 0.0001 and 7% by weight, said varnish comprising: A. the varnish containing a binder selected from the group consisting of a vinyl chloride hydroxy alkyl acrylate copolymer, a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer, a vinyl chloride-unsaturated carboxylic acid alkyl ester-unsaturated carboxylic acid copolymer and a partially saponified copolymer of vinyl chloride-vinyl acetate; and B. a non-volatile component of the group of plasticizers, stabilizers and auxiliary agents in a combined amount between 1.0 and 20.0 percent by weight.
Claim 20
Dependent Claim
22 words
A laminated safety glass according to claim 17 wherein said varnish comprises a copolymer of vinyl chloride, vinyl acetate and maleic acid.
Claim 21
Dependent Claim
19 words
A laminated safety glass according to claim 17, wherein said varnish is a partially saponified vinyl chloride-vinyl acetate copolymer.
Claim 22
Dependent Claim
18 words
A laminated safety glass according to claim 17, wherein said varnish is a vinyl chloride-hydroxy alkyl acrylate copolymer.
Claim 23
Dependent Claim
19 words
A laminated safety glass according to claim 17, wherein said varnish is a vinyl chloride-vinyl acetate-unsaturated carboxylic acid copolymer.
Claim 24
Dependent Claim
16 words
A laminated safety glass according to claim 21, wherein said unsaturated carboxylic acid is acrylic acid.
Claim 25
Dependent Claim
16 words
A laminated safety glass according to claim 21, wherein said unsaturated carboxylic acid is methacrylic acid.
Claim 26
Dependent Claim
22 words
A laminated safety glass according to claim 17, wherein said varnish is a vinyl chloride-unsaturated carboxylic acid alkyl ester-unsaturated carboxylic acid copolymer.
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |