Polymer interlayers comprising a blend of two or more resins

Patent metadata

Field	Value
Publication number	US-2016102181-A1
Application number	US-201514973547-A
Country	US
Kind code	A1
Filing date	Dec 17, 2015
Priority date	Jun 10, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

An interlayer comprised of a blend of thermoplastic resins and at least one high refractive index having improved acoustic and optical quality is disclosed. The use of a blend thermoplastic resins and a high refractive index plasticizer improves transparency and acoustic properties without sacrificing other characteristics of the interlayer.

First claim

1 . A polymer interlayer comprising a blend of resins, the blend comprising:
a first poly(vinyl butyral) resin having a first residual hydroxyl content; a second poly(vinyl butyral) resin having a second residual hydroxyl content; and a plasticizer; wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and wherein the refractive index of the blend is at least 1.480.

2 . The polymer interlayer of claim 1 , wherein the first poly(vinyl butyral) resin and the second poly(vinyl butyral) resin are present in a ratio of between about 95:5 and 5:95.

3 . The polymer interlayer of claim 1 , wherein the polymer interlayer has at least one glass transition temperature (T g ) greater than 25° C.

4 . The polymer interlayer of claim 1 , wherein the plasticizer is a high refractive index plasticizer having a refractive index of at least 1.460.

5 . The polymer interlayer of claim 1 , wherein the plasticizer is selected from dipropylene glycol dibenzoate, tripropylene glycol dibenzoate, polypropylene glycol dibenzoate, isodecyl benzoate, 2-ethylhexyl benzoate, diethylene glycol benzoate, butoxyethyl benzoate, butoxyethyoxyethyl benzoate, butoxyethoxyethoxyethyl benzoate, propylene glycol dibenzoate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate, 2,2,4-trimethyl-1,3-pentanediol benzoate isobutyrate, 1,3-butanediol dibenzoate, diethylene glycol di-o-toluate, triethylene glycol di-o-toluate, dipropylene glycol di-o-toluate, 1,2-octyl dibenzoate, tri-2-ethylhexyl trimellitate, di-2-ethylhexyl terephthalate, bis-phenol A bis(2-ethylhexaonate), di-(butoxyethyl) terephthalate, di-(butoxyethyoxyethyl) terephthalate, and mixtures thereof.

7 . The polymer interlayer of claim 4 , further comprising a second plasticizer having a refractive index of less than about 1.450.

8 . The polymer interlayer of claim 1 , wherein the polymer interlayer has a percent haze of less than 5.0%, as measured by ASTM D1003-61 (Re-approved 1977)-Procedure A using Illuminant C, at an observer angle of 2 degrees.

9 . The polymer interlayer of claim 1 , wherein the polymer interlayer has at least two different glass transition temperatures (T g ) and the difference between the at least two different glass transition temperatures (T g ) is at least 5° C.

10 . A polymer interlayer comprising a blend of resins, the blend comprising:
a first poly(vinyl butyral) resin having a first residual hydroxyl content; a second poly(vinyl butyral) resin having a second residual hydroxyl content; and a plasticizer; wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and wherein the polymer interlayer has a percent haze of less than 5.0%, as measured by ASTM D1003-61 (Re-approved 1977)-Procedure A using Illuminant C, at an observer angle of 2 degrees.

11 . The polymer interlayer of claim 10 , wherein the first poly(vinyl butyral) resin and the second poly(vinyl butyral) resin are present in a ratio of between about 95:5 and 5:95.

12 . The polymer interlayer of claim 10 , wherein the polymer interlayer has at least one glass transition temperature (T g ) greater than 25° C.

13 . The polymer interlayer of claim 10 , wherein the plasticizer is a high refractive index plasticizer having a refractive index of at least 1.460.

14 . The polymer interlayer of claim 10 , wherein the refractive index of the blend is at least 1.480.

15 . The polymer interlayer of claim 13 , further comprising a second plasticizer having a refractive index of less than about 1.450.

16 . The polymer interlayer of claim 10 , wherein the polymer interlayer has at least two different glass transition temperatures (T g ) and the difference between at least two different glass transition temperatures (T g ) is at least 5° C.

17 . A polymer interlayer comprising a blend of resins, the blend comprising:
a first poly(vinyl butyral) resin having a first residual hydroxyl content; a second poly(vinyl butyral) resin having a second residual hydroxyl content; and a plasticizer having a refractive index of at least 1.460; wherein the blend has at least one glass transition temperature (T g ) greater than 25° C., and wherein the refractive index of the polymer interlayer is at least 1.480.

18 . The polymer interlayer of claim 17 , wherein the refractive index of the polymer interlayer is at least 1.485.

19 . The polymer interlayer of claim 17 , wherein the first poly(vinyl butyral) resin and the second poly(vinyl butyral) resin are present in a ratio of between 95:5 and 5:95.

20 . The polymer interlayer of claim 17 , further comprising a second plasticizer, wherein the second plasticizer has a refractive index of less than about 1.450.

Assignees

• Solutia Inc

Inventors

• Lu Jun

Classifications

• B32B27/42

  comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• B32B27/30

  comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · CPC title

• B32B17/10605

  Type of plasticiser · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title