Interlayers comprising glycerol based plasticizer
View Patent ↗The present invention includes interlayers and multiple layer glazing panels comprising those interlayers, wherein the interlayers comprise poly(vinyl butyral) and a glycerol based plasticizer. The addition of the glycerol based plasticizer surprisingly results in a plasticized poly(vinyl butyral) layer that is suitable for use in a wide range of multiple layer glazing applications.
1. A multiple layer glazing interlayer, comprising:
a polymer layer comprising
poly(vinyl butyral); and,
a first plasticizer having the formula
where R 1 , R 2 , and R 3 can be different or the same, and can be —OH or
where R 4 is a hydrogen or a branched or straight chain aliphatic or aromatic hydrocarbon chain having from 3 to 14 carbons and wherein the sum of all carbons of R 1 , R 2 and R 3 is 4 to 24.
2. The interlayer of claim 1 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 8 to 24.
3. The interlayer of claim 1 , wherein the sum of all carbons R 1 , R 2 , and R 3 is 12 to 24.
4. The interlayer of claim 1 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 4 to 16.
5. The interlayer of claim 1 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 4 to 12.
6. The interlayer of claim 1 , wherein R 4 has 3 to 9 carbons for each of R 1 , R 2 , and R 3 .
7. The interlayer of claim 1 , wherein said first plasticizer has the formula:
8. The interlayer of claim 1 , wherein said interlayer further comprises a second plasticizer, wherein said first plasticizer is 2 to 99 weight percent of a plasticizer mixture of said first and said second plasticizer.
9. The interlayer of claim 8 , wherein said first plasticizer is 5 to 25 weight percent of said plasticizer mixture.
10. The interlayer of claim 8 , wherein said first plasticizer is glycerol tributyrate, and said second plasticizer is triethylene glycol di-(2-ethylhexanoate).
11. The interlayer of claim 8 , wherein said second plasticizer is triethylene glycol di-(2-ethylhexanoate).
12. A multiple layer glazing comprising:
a multiple layer glazing interlayer, comprising:
a polymer layer comprising:
poly(vinyl butyral); and,
a first plasticizer having the formula
where R 1 , R 2 , and R 3 can be different or the same, and can be —OH or
where R 4 is a hydrogen or a branched or straight chain aliphatic or aromatic hydrocarbon chain having from 3 to 14 carbons and wherein the sum of all carbons of R 1 , R 2 , and R 3 is 4 to 24.
13. The glazing of claim 12 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 8 to 24.
14. The glazing of claim 12 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 12 to 24.
15. The glazing of claim 12 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 4 to 16.
16. The glazing of claim 12 , wherein the sum of all carbons of R 1 , R 2 , and R 3 is 4 to 12.
17. The glazing of claim 12 , wherein R 4 has 3 to 9 carbons for each of R 1 , R 2 , and R 3 .
18. The glazing of claim 12 , wherein said first plasticizer has the formula:
19. The glazing of claim 12 , wherein said interlayer further comprises a second plasticizer, wherein said first plasticizer is 2 to 99 weight percent of a plasticizer mixture of said first and said second plasticizer.
20. The glazing of claim 19 , wherein said first plasticizer is 5 to 99 weight percent of said plasticizer mixture.
21. The glazing of claim 19 , wherein said first is glycerol tributyrate, and said second plasticizer is triethylene glycol di-(2-ethylhexanoate).
22. The glazing of claim 19 , wherein said second plasticizer is triethylene glycol di-(2-ethylhexanoate).
23. A method of forming a multiple layer glazing interlayer, comprising:
heating a poly(vinyl butyral) resin to a molten state;
adding a first plasticizer having the formula
where R 1 , R 2 , and R 3 can be different or the same, and can be —OH or
where R 4 is a hydrogen or a branched or straight chain aliphatic or aromatic hydrocarbon chain having from 3 to 14 carbons and wherein the sum of all carbons R 1 , R 2 , and R 3 is 4 to 24, to form a melt; and,
forming said melt into said interlayer.
24. The method of claim 23 further comprising:
adding a second plasticizer to said melt before forming said melt into said interlayer.