Method of manufacturing laminated safety glass

• US 4,277,538 A
• Filed: 01/24/1980
• Issued: 07/07/1981
• Est. Priority Date: 11/05/1975
• Status: Expired due to Term

• Current Assignee: Huels Troisdorf AG
• Original Assignee: Dynamit Nobel AG
• Inventors: Knackstedt, Wilhelm, Beckmann, Rolf
• Primary Examiner(s): VAN BALEN, WILLIAM
• Application Number:
  US06/114,801
• Time in Patent Office: 530 Days
• Field of Search: 428/213, 428/214, 428/215, 428/216, 428/429, 428/442, 428/447, 156/99, 156/102, 156/106
• US Class Current: 428/429
• CPC Class Codes: B32B 17/10045 with at least one intermediate layer consisting of a glass sheet
• CPC Class Codes: B32B 17/1055 characterized by the resin layer, i.e. interlayer
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 38/004 by physically contacting the layers, e.g. by the use of heated platens or rollers
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

A laminated safety glass comprising a layer of a silicate glass, to which is bonded a layer of a plasticized plastic sheet containing polyvinyl chloride, said laminate containing therein an organofunctional silane and a process for preparing such laminated safety glass by unilateral or bilateral bonding of one or more silicate glass sheets with a plasticized polyvinyl chloride plastic film at an elevated temperature wherein the bonding is effected with the aid of a silicon-organo-functional silane and the bonding is effected at 120°-200° C.

Claims

1. In a method for manufacturing a laminated safety glass wherein a pair of silicate glass sheets are bonded to opposed sides of a plasticized plastic film at an elevated temperature, the improvement wherein said plasticized plastic film is a plasticized polyvinyl chloride containing film of a high molecular weight vinyl chloride homopolymer, copolymer or graft polymer and said plasticized film is bonded to said pair of silicate glass sheets with a bonding agent consisting essentially of a functional silane, the bonding being performed at a temperature in the range of 120°

to 200°

C.

2. A process according to claim 1 wherein the plasticized plastic film is a polyvinylchloride-containing film containing polymers miscible therewith which polymers are not made from vinyl chloride.

3. A process according to claim 1 wherein the polyvinyl chloride polymer of the plasticized plastic film has a K value of 50 to 80.

4. A process according to claim 3 wherein the polyvinyl chloride polymer of the plasticized plastic film has a K value of 60 to 75.

5. A process according to claim 1 wherein the plasticized plastic film has a Shore hardness A of 40 to 98.

6. A process according to claim 5 wherein the plasticized plastic film has a Shore hardness A of 50 to 95.

7. A process according to claim 1 wherein the functional silane is a silicon-organofunctional alkoxy silane containing an amino and/or imino or epoxy group, one or both of the hydrogen atoms of the amino group, if present, being replaceable by an amino, hydroxy alkyl or polyamino moiety.

8. A process according to claim 7 wherein the silicon-organofunctional silane has the general formula ##STR6## in which R is a C₁ to C₁₀ alkyl moiety which can be interrupted by oxygen atoms, R'"'"''"'"''"'"' is an alkyl moiety of 1 to 8 carbon atoms, A is a straight-chain or branched alkylene moiety of 1 to 8 carbon atoms which can be interrupted by oxygen bridges, m=1 or 2 or 3, n=1 or 2 or 3, R'"'"', when m=1, represents H and/or R"-NH₂ or R"OH (R" being an alkylene moiety of 2 to 4 carbon atoms), and, when m=2, R'"'"' represents H or ##STR7##

9. A process according to claim 7 wherein the silicon-organofunctional silane is one having the formula ##STR8## in which R, R'"'"''"'"''"'"', A and n have the same meaning as in Formula I and R'"'"' is H or CH₃ or C₂ H₅.

10. A process according to claim 1 wherein said silane is dissolved in a solvent and is applied to at least one of the adjoining surfaces of the layers to be bonded and, prior to bonding, the surface is freed of said solvent.

11. A process according to claim 10 wherein the silane concentration in the solution ranges from 0.01 to 5 percent by weight.

12. A process according to claim 11 wherein the concentration of silane in the solution is from 0.1 to 3 percent by weight.

13. A process according to claim 1 wherein said silane is employed in the form of a solution containing a lacquer binding agent and is applied to at least one of the adjoining surfaces to be bonded and prior to bonding the surface is freed of said solvent, the bonding being carried out at a temperature of 120°

to 150°

C.

14. A process according to claim 1 wherein the silane is homogeneously distributed within the plasticized plastic film.

15. A process according to claim 14 wherein said film contains 0.1 to 5 percent by weight of said silane.

16. A process according to claim 15 wherein said film contains 0.5 to 3 weight percent silane.

17. A process according to claim 7 wherein said silane has the formula

18. A process according to claim 5 wherein said silane is selected from the group consisting of γ

-aminopropyltrialkoxysilane, γ

-aminoethyltrialkoxysilane, β

-aminoethyl-γ

-oxypropylmethyldialkoxysilane and polyaminotrialkoxysilane.

19. A process according to claim 7 wherein said silane has the formula

20. A process according to claim 1 wherein said silane is a silicon-functional silane and has the formula

21. A process according to claim 20 wherein said silane is selected from the group consisting of propyltriethoxysilane, propyltrimethoxysilane, isopropyldimethoxyethoxysilane, n-butyl triethoxysilane, isobutyltriethoxysilane, n-butyl trimethoxysilane and isobutyltrimethoxysilane.

25. A laminate according to claim 1 wherein said functional silane is an silicon organo functional alkoxy silane containing an amino and/or imino and/or epoxy group, one or both of the hydrogen atoms of any amino group present being replaceable by an amino, hydroxy alkyl or polyamino moiety.

26. A laminate according to claim 25 wherein said organofunctional silane has the formula ##STR9## in which R is a C₁ to C₁₀ alkyl moiety which can be interrupted by oxygen atoms, R'"'"''"'"''"'"' is an alkyl moiety of 1 to 8 carbon atoms, A is a straight-chain or branched alkylene moiety of 1 to 8 carbon atoms which can be interrupted by oxygen bridges, m=1 or 2 or 3, n=1 or 2 or 3, R'"'"', when m=1, represents H and/or R"--NH₂ or R"OH (R" being an alkylene moiety of 2 to 4 carbon atoms), and, when m=2, R'"'"' represents H or ##STR10##

27. A laminate according to claim 25 wherein said silicon organofunctional silane is one having the formula ##STR11## in which R, R'"'"''"'"''"'"', A and n have the same meaning as in Formula I and R'"'"' is H or CH₃ or C₂ H₅.

28. A laminate according to claim 25 wherein said silane has the formula

29. A laminate according to claim 25 wherein said silane has the formula

22. A laminate comprising a pair of silicate glass sheets bonded to a plasticized plastic sheet of a vinyl chloride containing polymer, said plasticized sheet containing a functional silane therein.

23. A laminate according to claim 22 wherein said functional silane is disposed at the interface between the silicate glass and the plasticized polyvinyl chloride containing sheet.

24. A laminate according to claim 22 wherein said functional silane is disposed within said polyvinyl chloride containing sheet.

30. A laminate according to claim 22 wherein said silane is a silicon-functional silane and has the formula

31. A laminate according to claim 22 wherein said polyvinyl chloride sheet is a sheet of a polyvinyl chloride homopolymer, a sheet of a polyvinyl chloride copolymer or a sheet of a graft polymer containing polyvinyl chloride.

32. A laminate according to claim 31 wherein said silane is present in an amount of 0.01 to 5 weight percent and said silane is disposed at the interface of said plastic sheet and said silicate glass.

33. A laminate according to claim 31 wherein said silane is disposed within the plastic sheet and is present therein in an amount of 0.1 to 5 percent by weight.

34. A laminate according to claim 22, containing 17% to 45% by weight plasticizer.

35. A laminate according to claim 34, containing 20% to 37% by weight plasticizer.