Laminated glazing unit comprising copolymers of vinyl chloride, allyl glycidyl ether, and a vinyl ester and method of making the same
AssigneeLibbey-Owens-Ford Co.
InventorsHung S. Park, David A. Strickler, Anthony A. Parker
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Abstract
An improved method is provided for copolymerizing vinyl chloride with allyl glycidyl ether and a vinyl ester. The copolymers so formed include 70-99 weight % of vinyl chloride, 0.05-15 weight % of allyl glycidyl ether, and 0.05-15 weight % of a vinyl ester, preferably vinyl acetate. The copolymers of this invention can be compounded to provide films exhibiting improved heat stability, low haze, and good adhesion to solid surfaces such as glass and metal. The compounded resins thus obtained may be especially advantageously used in forming the interlayer of laminated safety glazings, such as vehicle windshields and architectural glazings.
Claims14
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 vinyl chloride, allyl glycidyl ether, and a vinyl ester, said copolymer has a particle size of at least about 10 microns (.mu.m).
A laminated glazing unit, consisting essentially of 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 vinyl chloride, allyl glycidyl ether, and a vinyl ester, the degree of polymerization of the copolymenr being at least about 400, said copolymer has a particle size of at least about 10 microns (.mu.m);
- and the unit having a pummel value of at least 3 and a have value less than about 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 vinyl chloride, allyl glycidyl ether, and a vinyl ester, said copolymer has an average particle size of at least about 10 microns (.mu.m).
Dependencies are inferred from the claim text.