Process of the production of composite safety glass
AssigneeDynamit Nobel Aktiengesellschaft
InventorsRolf Beckmann, Wilhelm Knackstedt
Life of this patent
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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.degree. C. and up to 200.degree. C.
Claims24
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.degree. to 200.degree. C. and the solvent is thereafter removed.
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;
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- 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.
Dependencies are inferred from the claim text.