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US 10,960,650 B2Granted
Poly(vinyl acetal) resin compositions, layers, and interlayers having enhanced properties
AssigneeSolutia Inc.
InventorsYinong Ma, Nandan Ukidwe
Life of this patent
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Abstract
Resin compositions, layers, and interlayers comprising a poly(vinyl acetal) resin that includes residues of an aldehyde other than n-butyraldehyde are provided. Such compositions, layers, and interlayers can exhibit enhanced or optimized properties as compared to those formulated with comparable poly(vinyl n-butyral) resins.
Claims20
An interlayer comprising:
- a first resin layer comprising a first poly(vinyl acetal) resin and a first plasticizer;
- and
- a second resin layer adjacent to said first resin layer, wherein said second resin layer comprises a second poly(vinyl acetal) resin and a second plasticizer, wherein said second plasticizer is present in said second resin layer in an amount of at least 70 parts per hundred parts of resin (phr) and wherein the difference between the amount of said first plasticizer in said first resin layer and the amount of said second plasticizer in said second resin layer is more than 15 phr,
- wherein at least one of said first and said second poly(vinyl acetal) resins comprises at least 5 weight percent of residues of an aldehyde other than n-butyraldehyde, based on the total weight of aldehyde residues of said first or said second poly(vinyl acetal) resin, and
- wherein the glass transition temperature of said first resin layer is at least 3° C. higher than the glass transition temperature of said second resin layer, and wherein the absolute value of the difference between the refractive index of said first resin layer and the refractive index of said second resin layer is not more than 0.010;
- wherein the difference between the residual hydroxyl content of said first poly(vinyl acetal) resin and the residual hydroxyl content of said second poly(vinyl acetal) resin is at least 2 weight percent and wherein said interlayer has a haze value of less than 5 percent.
3 more elements
An interlayer comprising:
- a first resin layer comprising a first poly(vinyl acetal) resin and a first plasticizer;
- and
- a second resin layer adjacent to said first resin layer, wherein said second resin layer comprises a second poly(vinyl acetal) resin and a second plasticizer, wherein said second plasticizer is present in said second resin layer in an amount of at least 70 phr and wherein the difference between the amount of said first plasticizer in said first resin layer and the amount of said second plasticizer in said second resin layer is more than 15 phr,
- wherein said first poly(vinyl acetal) resin comprises at least 5 weight percent of residues of an aldehyde other than n-butyraldehyde, based on the total weight of aldehyde residues of said first poly(vinyl acetal) resin, wherein said first poly(vinyl acetal) resin has a residual hydroxyl content in the range of from 16 to 20 weight percent, wherein said first plasticizer is present in said first resin layer in an amount of not more than 40 phr, and wherein said second poly(vinyl acetal) resin comprises at least 5 weight percent of n-butyraldehyde residues and has a residual hydroxyl content in the range of from 8 to 13 weight percent,
- wherein the difference in the glass transition temperature of said first resin layer and the glass transition temperature of said second resin layer is at least about 20° C., and
- wherein the absolute value of the difference between the refractive index of said first resin layer and the refractive index of said second resin layer is not more than 0.010;
- wherein the difference between the residual hydroxyl content of said first poly(vinyl acetal) resin and the residual hydroxyl content of said second poly(vinyl acetal) resin is at least 2 weight percent and wherein said interlayer has a haze value of less than 5 percent.
4 more elements
An interlayer comprising:
- a first resin layer comprising a first poly(vinyl acetal) resin and a first plasticizer;
- and
- a second resin layer adjacent to said first resin layer, wherein said second resin layer comprises a second poly(vinyl acetal) resin and a second plasticizer, wherein said second plasticizer is present in said second resin layer in an amount of at least 70 phr and wherein the difference between the amount of said first plasticizer in said first resin layer and the amount of said second plasticizer in said second resin layer is more than 15 phr,
- wherein said first poly(vinyl acetal) resin comprises at least 5 weight percent of residues of i-butyraldehyde, based on the total weight of aldehyde residues of said first poly(vinyl acetal) resin, wherein said first poly(vinyl acetal) resin has a residual hydroxyl content in the range of from 16 to 20 weight percent, wherein said first plasticizer is present in said first resin layer in an amount of not more than 40 phr, and wherein said second poly(vinyl acetal) resin comprises at least 5 weight percent of n-butyraldehyde residues and has a residual hydroxyl content in the range of from 8 to 13 weight percent,
- wherein the difference in the glass transition temperature of said first resin layer and the glass transition temperature of said second resin layer is at least about 20° C., and
- wherein the absolute value of the difference between the refractive index of said first resin layer and the refractive index of said second resin layer is not more than 0.010;
- wherein the difference between the residual hydroxyl content of said first poly(vinyl acetal) resin and the residual hydroxyl content of said second poly(vinyl acetal) resin is at least 2 weight percent and wherein said interlayer has a haze value of less than 5 percent.
4 more elements
Dependencies are inferred from the claim text.