Polymer interlayers comprising a blend of two or more resins

Patent metadata

Field	Value
Publication number	US-9248626-B2
Application number	US-201414300612-A
Country	US
Kind code	B2
Filing date	Jun 10, 2014
Priority date	Jun 10, 2013
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

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

The invention claimed is:

1. A monolithic polymer interlayer 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, wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and
a plasticizer having a refractive index of at least 1.460.

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 ) less than 25° C.

4. 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.

5. The polymer interlayer of claim 4 , wherein the plasticizer is selected from dipropylene glycol dibenzoate and tripropylene glycol dibenzoate, and 2,2,4-trimethyl-1,3-pentanediol dibenzoate.

6. The polymer interlayer of claim 1 , further comprising a second high refractive index plasticizer having a refractive index of at least 1.460.

7. The polymer interlayer of claim 1 , wherein the polymer interlayer further comprises a plasticizer having a refractive index of less than about 1.450.

8. The polymer interlayer of claim 1 , wherein the percent haze is 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 monolithic polymer interlayer 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, wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and
at least one plasticizer having a refractive index of at least 1.460 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.

11. The polymer interlayer of claim 10 , wherein the plasticizer is selected from dipropylene glycol dibenzoate, 2,2,4-trimethyl-1,3-pentanediol dibenzoate and tripropylene glycol dibenzoate.

12. 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.

13. The polymer interlayer of claim 10 , further comprising a second high refractive index plasticizer having a refractive index of at least 1.460.

14. The polymer interlayer of claim 10 , wherein the percent haze is 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.

15. 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.

16. A monolithic polymer interlayer 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, wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and
a plasticizer having a refractive index of at least 1.460,
wherein the refractive index of the polymer interlayer is at least 1.480.

17. The polymer interlayer of claim 16 , wherein the refractive index of the polymer interlayer is at least 1.485.

18. 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.

19. The polymer interlayer of claim 17 , 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.

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

• B32B2250/03

  3 layers · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B2605/18

  Aircraft · CPC title

• B32B2419/00

  Buildings or parts thereof · CPC title

• B32B2307/412

  Transparent · CPC title