Thermoplastic polyurethane interlayer

Patent metadata

Field	Value
Publication number	US-9604436-B2
Application number	US-201514602008-A
Country	US
Kind code	B2
Filing date	Jan 21, 2015
Priority date	Nov 30, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A composition includes an isocyanate, a polyether diol, a branched short chain diol having a backbone including carbon atoms in a range of 1 to 9 and at least one branching group, and a cross-linker having a hydroxyl functionality in a range of 2.2 to 4. A films includes the composition and an interlayer includes the film. Transparencies including the interlayer and methods of making the same are further disclosed.

First claim

What is claimed is:

1. A film obtained from a composition comprising:
an isocyanate;
a polyether diol having a molecular weight of 2900 g/mol or greater;
a branched short chain diol having a backbone including carbon atoms in a range of 1 to 9, and at least one branching group; and
a cross-linker having a hydroxyl functionality in a range of 2.2 to 4,
wherein the film having a glass transition temperature in a range of about 16° C. to about 33° C.

2. The film of claim 1 , wherein the branched short chain diol comprises one to four branching groups having from 1 to 4 carbon atoms.

3. The film of claim 1 , wherein the at least one branching group comprises 1 to 4 branching groups.

4. The film of claim 1 , wherein the at least one branching group has 1 to 4 carbon atoms.

5. The film of claim 1 , wherein the branched short chain diol comprises ethyl-butyl propane diol.

6. An interlayer, comprising the film according to claim 1 .

7. A transparency, comprising:
a transparent, rigid substrate; and
the interlayer of claim 6 on the transparent, rigid substrate.

8. The transparency of claim 7 , wherein the transparent, rigid substrate includes a material selected from the group consisting of glasses, polycarbonates, casted acrylics, stretched acrylics, and polyurethanes.

9. The transparency of claim 7 , further comprising a primer layer between the interlayer and the transparent, rigid substrate.

10. The transparency of claim 7 , further comprising a second transparent, rigid substrate, wherein the interlayer is between the transparent, rigid substrate and the second transparent, rigid substrate.

11. The transparency of claim 10 , wherein the second transparent, rigid substrate comprises a material different from a material of the transparent, rigid substrate.

12. The transparency of claim 10 , further comprising a primer layer between the interlayer and the second transparent, rigid substrate.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Boghossian Razmik
• Lakdawala Khushroo H

Classifications

• Y10T428/31601

  Quartz or glass · CPC title

• Y10T428/31576

  Ester monomer type [polyvinylacetate, etc.] · CPC title

• Y10T428/31573

  Next to addition polymer of ethylenically unsaturated monomer · CPC title

• Y10T428/31554

  Next to second layer of polyamidoester · CPC title

• Y10T428/31551

  Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.] · CPC title