Polymer interlayers comprising antiblocking layers

• US 9,023,463 B2
• Filed: 11/19/2013
• Issued: 05/05/2015
• Est. Priority Date: 03/24/2005
• Status: Active Grant

• Current Assignee: Eastman Chemical Company
• Original Assignee: Eastman Chemical Company
• Inventors: Lin, Chiah-chang Clifford, Yuan, Ping
• Primary Examiner(s): Chen, Vivian
• Application Number:
  US14/084,516
• Publication Number:
  US 20140079928A1
• Time in Patent Office: 532 Days
• Field of Search: None
• US Class Current: 428/212
• CPC Class Codes: B32B 17/1055 characterized by the resin layer, i.e. interlayer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10935 as a preformed layer, e.g. formed by extrusion
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2250/246 All polymers belonging to those covered by groups B32B27/32 and B32B27/30
• CPC Class Codes: B32B 2264/0264 Polyamide particles
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2329/06 PVB, i.e. polyinylbutyral
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/42 comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08K 5/20 : Carboxylic acid amides
• CPC Class Codes: C08L 2666/36 : Nitrogen-containing compounds
• CPC Class Codes: C08L 29/14 : Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/2495 : Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/269 : including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/31627 : Next to aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/3163 : Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31909 : Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31942 : Of aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31946 : Next to second aldehyde or ketone condensation product

Abstract

The present invention is in the field of polymer interlayers used in multiple layer glass panels, and specifically the present invention is in the field of antiblocking agents for polymer interlayers and methods of effectively incorporating such agents into interlayers.

Claims

1. A multiple layer interlayer comprising:

a first poly(vinyl butyral) layer having a concentration of about 0.01 to 0.6 wt. % of an antiblocking agent and having a thickness of less than 0.4 millimeters; and

a second poly(vinyl butyral) layer disposed in contact with the first poly(vinyl butyral) layer, wherein the second poly(vinyl butyral) layer has no added antiblocking agent,

wherein the interlayer has a haze value of less than 3%, and

wherein the antiblocking agent is a fatty acid amide of the formula;

2. The interlayer of claim 1, wherein the interlayer has a haze value of less than 1%.

3. The interlayer of claim 1, wherein the first poly(vinyl butyral) layer has a thickness of less than 0.25 millimeters.

4. The interlayer of claim 1, wherein the antiblocking agent comprises N-oleyl palmitamide.

5. The interlayer of claim 1, wherein the fatty acid amide is incorporated in the first poly(vinyl butyral) layer at a concentration of about 0.1 to about 0.3 wt %.

6. The interlayer of claim 1, further comprising a third poly(vinyl butyral) layer, wherein the second poly(vinyl butyral) layer is disposed between the first poly(vinyl butyral) layer and the third poly(vinyl butyral) layer, and wherein the third poly(vinyl butyral) layer has an antiblocking agent.

7. The interlayer of claim 1, wherein the interlayer has a pummel adhesion value of at least 3.

8. A multiple layer laminated glazing panel comprising:

a first poly(vinyl butyral) layer having a concentration of about 0.01 to 0.6 wt. % of an antiblocking agent and having a thickness of less than 0.4 millimeters; and

a second poly(vinyl butyral) layer disposed in contact with the first poly(vinyl butyral) layer, wherein the second poly(vinyl butyral) layer no added antiblocking agent,

wherein the interlayer has a haze value of less than 3%, and

wherein the antiblocking agent is a fatty acid amide of the formula;

9. The glazing panel of claim 8, wherein the interlayer has a haze value of less than 1%.

10. The glazing panel of claim 8, wherein the first poly(vinyl butyral) layer has a thickness of less than 0.25 millimeters.

11. The interlayer of claim 8, wherein the fatty acid amide is incorporated in the first poly(vinyl butyral) layer at a concentration of about 0.1 to about 0.3 wt %.

12. The glazing panel of claim 8, wherein the interlayer has a pummel adhesion value of at least 3.

13. A multiple layer interlayer comprising:

a first poly(vinyl butyral) layer having a concentration of about 0.01 to 0.6 wt. % of an antiblocking agent and having a thickness of less than 0.4 millimeters;

a second poly(vinyl butyral) layer disposed in contact with the first poly(vinyl butyral) layer, wherein the second poly(vinyl butyral) layer no added antiblocking agent; and

a third poly(vinyl butyral) layer disposed in contact with the second poly(vinyl butyral) layer having a concentration of about 0.01 to 0.3 wt. % of an antiblocking agent and having a thickness of less than 0.4 millimeters,

wherein the second poly(vinyl butyral) layer is between the first poly(vinyl butyral) layer and the third poly(vinyl butyral) layer,

and wherein the interlayer has a haze value of less than 3% and a pummel adhesion value of at least 3,

and wherein each antiblocking agent is a fatty acid amide of the formula;

14. The interlayer of claim 13, wherein the antiblocking agent comprises N-oleyl palmitamide, and wherein the antiblocking agent incorporated in the first poly(vinyl butyral) layer and the third poly(vinyl butyral) layer at a concentration of about 0.1 to about 0.3 wt %.