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High impact polymer interlayers

a polymer interlayer and high impact resistance technology, applied in the direction of synthetic resin layered products, transportation and packaging, chemistry apparatus and processes, etc., can solve the problems of low penetration resistance, low impact resistance of interlayer, and inability to resist high wind load after impact, so as to achieve high impact protection

Inactive Publication Date: 2008-10-30
SOLUTIA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The present invention provides multiple poly(vinyl butyral) layer interlayers that can be used in multiple layer glass panel type applications that require a high level of impact protection, for example in hurricane protection applications or in bullet proof glass applications. This effect is achieved by forming a poly(vinyl butyral) interlayer that has a relatively stiff poly(vinyl butyral) inner layer disposed between two relatively soft outer poly(vinyl butyral) layers, where the stiffness difference is achieved by a plasticizer differential that is achieved at least in substantial part by a residual hydroxyl content difference among the poly(vinyl butyral) layers.

Problems solved by technology

If an interlayer is too soft or adhesion to glass is too low, then the interlayer will not have the strength to resist high wind loading after an impact.
On the other hand, if the interlayer is too stiff and adhesion to glass is too high, then the interlayer will not have a high level of impact resistance—i.e., the interlayer will have low penetration resistance.

Method used

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Examples

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examples

Impact Resistance:

[0065]Examples of the poly(vinyl butyral) multiple layer interlayers having improved impact resistance are listed in Table 1. The impact resistance, shown as the Mean Break Height (MBH) in the unit of meters, is illustrated in FIG. 2.

[0066]For the three Samples given in Table 1, each sample interlayer has a total thickness of 0.64 millimeters (25 mil) comprising a first layer and a third layer each having 16% residual hydroxyl content and a thickness of 0.10 millimeters (4 mils) with a second layer having 18.5% residual hydroxyl content and a thickness of 0.43 millimeters (17 mils) between and in contact with the first layer and the third layer.

[0067]Table 1 provides the phr of the plasticizer triethylene glycol di-(2-ethylhexanoate) (3GEH) formulated with the resin.

TABLE 1phr of plasticizerSampleLayer 1Layer 2Layer 3132223222522253322732

[0068]As shown in FIG. 2, the tested multiple layer interlayer embodiments of the present invention demonstrate a higher impact p...

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Abstract

The present invention provides multiple poly(vinyl butyral) layer interlayers that can be used in multiple layer glass panel type applications that require a high level of impact protection, for example in hurricane protection applications or in bullet proof glass applications. This effect is achieved by forming a poly(vinyl butyral) interlayer that has a relatively stiff poly(vinyl butyral) inner layer disposed between two relatively soft outer poly(vinyl butyral) layers, where the stiffness difference is achieved by a plasticizer differential that is achieved at least in substantial part by a residual hydroxyl content difference among the poly(vinyl butyral) layers.

Description

FIELD OF THE INVENTION[0001]The present invention is in the field of polymer interlayers and multiple layer glass panels comprising polymer interlayers, and, more specifically, the present invention is in the field of polymer interlayers comprising multiple thermoplastic layers.BACKGROUND[0002]Poly(vinyl butyral) (PVB) is commonly used in the manufacture of polymer layers that can be used as interlayers in light-transmitting laminates such as safety glass or polymeric laminates. Safety glass often refers to a transparent laminate comprising a poly(vinyl butyral) layer disposed between two layers of glass. Safety glass often is used to provide a transparent barrier in architectural and automotive openings. Its main function is to absorb energy, such as that caused by a blow from an object, without allowing penetration through the opening or the dispersion of shards of glass, thus minimizing damage or injury to the objects or persons within an enclosed area. Safety glass also can be u...

Claims

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Application Information

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IPC IPC(8): B22F3/00C08K5/00B29C48/08B29C48/18
CPCC08K5/0016B29C47/06B32B17/10761B32B27/30B29C47/0021C08L29/14Y10T428/31913B29C48/08B29C48/18B32B27/304B32B27/306B32B27/08B32B27/22B32B27/40B32B27/42B32B2419/00B32B2605/00
Inventor CHEN, WENJIEKARAGIANNIS, ARISTOTELIS
Owner SOLUTIA INC
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