Claims
- 1. A laminated glazing unit, comprising a first glass sheet, a second glass sheet and an interlayer adhered therebetween, said interlayer being formed of a film including a vinyl chloride copolymer formed by the suspension polymerization of a monomer mixture including:
- a) vinyl chloride or a mixture of vinyl chloride and one or more other vinyl monomers copolymerizable therewith, and
- b) allyl glycidyl ether;
- c) a vinyl ester, and
- d) an unsaturated organic alkoxy functional silane that provides self-adhesion without gelation.
- 2. A laminated glazing unit as defined in claim 1, wherein said vinyl chloride copolymer is prepared by the suspension polymerization of a monomer mixture including at least about 70% by weight vinyl chloride, from about 0.05% by weight to about 15% by weight allyl glycidyl ether, from about 0.05% by weight to about 15% by weight of a vinyl ester, and no more than about 0.8% by weight of an unsaturated organic trifunctional silane.
- 3. A laminated glazing unit as defined in claim 1, wherein said vinyl ester is vinyl acetate.
- 4. A laminated glazing unit as defined in claim 1, wherein said monomer mixture further includes an allyl ether or mixture of allyl ethers, the amount of which does not exceed about 20% by weight of said total monomer mixture.
- 5. A laminated glazing unit as defined in claim 4, wherein said allyl ether is trimethylolpropane monoallyl ether.
- 6. A laminated glazing unit as defined in claim 1, wherein the degree of polymerization of said copolymer is at least about 530.
- 7. A laminated glazing unit as defined in claim 6, wherein the degree of polymerization of said copolymer is at least about 900.
- 8. A laminated glazing unit as defined in claim 1, wherein said interlayer, when formed as a film of nominal thickness of about 30 mils and laminated between a pair of glass sheets each having a nominal thickness of about 88 mils, having a pummel value of at least 3 and a haze value of less than 1%.
- 9. A laminated glazing unit as defined in claim 1, in which the silane is .gamma.-methacryloxy propyl trimethoxysilane.
- 10. A laminated glazing unit as defined in claim 1, in which the silane is .gamma.-methacryloxy vinyl trimethoxysilane.
- 11. A laminated glazing unit comprising a first glass sheet, a second glass sheet, and an interlayer adhered there between, said interlayer being formed of a film including a vinyl chloride copolymer composed of a suspension polymerized monomer mixture in a process wherein water is the continuous phase and the monomer mixture is the discontinuous phase, said monomer mixture comprising at least about 70% by weight vinyl chloride, from about 0.05% by weight to about 15% by weight of a vinyl ester, and an effective self-adhesion prompting without gelling amount of an unsaturated organic alkoxy functional silane that is equivalent to about 0.5% by weight of .gamma.-methacryloxy propyl trimethoxysilane.
- 12. A laminated glazing unit comprising a first glass sheet, a second glass sheet, and an interlayer adhered there between, said interlayer being formed by a film including a vinyl chloride copolymer constituted of particles prepared by the suspension polymerization of a monomer mixture consisting essentially of:
- a) vinyl chloride or a mixture of vinyl chloride and one or more other vinyl monomers copolymerizable therewith; and
- b) allyl glycidyl ether;
- c) a vinyl ester, and
- d) an unsaturated organic alkoxy functional silane, wherein the average particle size of said polymer particles is between 10 .mu.m and 250 .mu.m.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. Ser. No. 08/726,378 filed Oct. 4, 1996 now U.S. Pat. No. 5,747,617, which is a continuation-in-part of U.S. Ser. No. 08/513,693, filed Aug. 11, 1995 now U.S. Pat. No. 5,641,845, which are both incorporated herein by reference.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5091487 |
Hori et al. |
Feb 1992 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
726378 |
Oct 1996 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
513693 |
Aug 1995 |
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