Resin sheets exhibiting enhanced adhesion to inorganic surfaces

Patent metadata

Field	Value
Publication number	US-2016159042-A1
Application number	US-201514887907-A
Country	US
Kind code	A1
Filing date	Oct 20, 2015
Priority date	Dec 8, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

Resin layers and interlayers exhibiting enhanced adhesion to inorganic surfaces, such as glass, are provided. In some cases, the layers and interlayers may comprise at least one adhesion stabilizing agent for improving adhesion to various surfaces, even in the presence of moisture. Such layers and interlayers may be useful, for example, in multiple layer panels, such as, for example, safety glass used in automotive and architectural applications.

First claim

What is claimed is:

1 . A method of making or treating an interlayer, said method comprising: applying a coating material to at least a portion of at least one surface of an ionomeric resin sheet to thereby provide a surface-treated ionomeric resin sheet, wherein said coating material comprises at least one silanol-containing adhesion stabilizing agent or precursor thereto.

2 . The method of claim 1 , wherein said silanol-containing adhesion stabilizing agent or precursor thereto is present in said coating material in an amount of at least 0.25 weight percent, based on the total weight of said coating material.

3 . The method of claim 1 , wherein said silanol-containing adhesion stabilizing agent or precursor thereto comprises at least one alkoxysilane selected from the group consisting of γ-glycidoxypropyltrimethoxysilane, aminoethylaminopropyltrimethoxysilane, and combinations thereof.

4 . The method of claim 1 , wherein said applying includes spray coating at least a portion of said coating material onto at least a portion of said surface.

5 . The method of claim 1 , wherein surface-treated ionomeric resin sheet comprises one or more surface-treated locations that exhibit a silanol concentration gradient characterized by a surface concentration of elemental silicon that is greater than a mid-thickness concentration of elemental silicon, wherein said ionomeric resin sheet comprises a perimeter region defined as the portion of said ionomeric resin sheet located within 0.25 inches of the perimeter edges of said ionomeric resin sheet, wherein at least a portion of said surface-treated locations are located within said perimeter region and wherein at least 10 percent of the total surface area of said perimeter region is made up of at least a portion of said surface-treated locations.

6 . The method of claim 1 , wherein said method is a method of treating an interlayer; further comprising, prior to said applying, obtaining a pre-formed ionomeric resin sheet, wherein said applying includes applying said coating material to at least a portion of said pre-formed resin sheet to provide said surface-treated ionomeric resin sheet.

7 . The method of claim 1 , wherein said method is a method of making an interlayer; further comprising, prior to said applying, forming said ionomeric resin sheet, wherein said applying includes applying said coating material to at least a portion of said ionomeric resin sheet after said forming.

8 . A method of making a multiple layer panel, said method comprising:
(a) applying a coating material to at least a portion of at least one surface of an ionomeric resin sheet to thereby provide a surface-treated ionomeric resin sheet comprising one or more surface-treated locations, wherein said coating material comprises at least one silanol-containing adhesion stabilizing agent or precursor thereto; (b) assembling said surface-treated ionomeric resin sheet between a pair of rigid substrates to form a construct, wherein said surface-treated ionomeric resin sheet is positioned between said pair of rigid substrates such that at least a portion of said surface-treated locations are in contact with one of said rigid substrates; and (c) laminating said construct to form said multiple layer panel.

9 . The method of claim 8 , wherein said silanol-containing adhesion stabilizing agent or precursor thereto is present in said coating material in an amount of at least 0.25 weight percent, based on the total weight of said coating material.

10 . The method of claim 9 , wherein said silanol-containing adhesion stabilizing agent or precursor thereto comprises at least one alkoxysilane selected from the group consisting of γ-glycidoxypropyltrimethoxysilane, aminoethylaminopropyltrimethoxysilane, and combinations thereof.

11 . The method of claim 8 , wherein at least one of said rigid substrates comprises a float glass panel having a tin-side surface and an air-side surface, wherein said assembling includes positioning said surface-treated ionomeric resin sheet between said pair of rigid substrates such that at least a portion of said surface-treated locations are in contact with said air-side surface of said float glass panel.

12 . The method of claim 8 , wherein said applying does not include applying said coating material to either of said rigid substrates.

13 . The method of claim 8 , wherein said applying includes spray coating said coating material onto at least a portion of said surface of said ionomeric resin sheet.

14 . The method of claim 8 , wherein said coating material further comprises a carrier liquid and wherein said carrier liquid is water.

15 . The method of claim 8 , wherein said surface-treated ionomeric resin sheet exhibits an average compressive shear adhesion of at least 20 MPa after exposure to 95% relative humidity at 50° C. for three weeks.

16 . An interlayer sheet comprising an ionomeric resin and at least one silanol-containing adhesion stabilizing agent, wherein said sheet comprises one or more surface-treated locations exhibiting a silanol concentration gradient characterized by a surface concentration of elemental silicon that is greater than a mid-thickness concentration of elemental silicon.

17 . The sheet of claim 16 , wherein the molar ratio of said surface concentration of elemental silicon to said mid-thickness concentration of elemental silicon at one or more of said surface-treated locations is at least 10:1.

18 . The sheet of claim 16 , wherein said surface concentration of elemental silicon at said surface-treated location is in the range of from about 0.1 to about 15 atomic percent, measured by XPS.

19 . The sheet of claim 16 , wherein said sheet comprises a perimeter region defined as the portion of said sheet located within 0.25 inches of the perimeter edges of said sheet, wherein at least a portion of said surface-treated locations are located within said perimeter region and wherein at least 10 percent of the total surface area of said perimeter region is made up of at least a portion of said surface-treated locations.

20 . The sheet of claim 16 , wherein said sheet exhibits an average compressive shear adhesion of at least 20 MPa after exposure to 95% relative humidity at 50° C. for three weeks.

Assignees

• Solutia Inc

Inventors

• Cui Weihong
• Haldeman Steven V
• Koran Francois Andre
• Zhang Pu

Classifications

• B29C66/7315

  Mechanical properties · CPC title

• B29C65/48

  using adhesives {, i.e. using supplementary joining material; solvent bonding} · CPC title

• B32B37/0038

  involving application of liquid to the layers prior to lamination, e.g. wet laminating (B32B37/12 takes precedence) · CPC title

• B29C66/026

  Chemical pre-treatments (B29C66/028 takes precedence) · CPC title

• B29L2007/002

  Panels; Plates; Sheets · CPC title