Laminates of polycarbonate or acrylate and plasticized polyvinyl butyral

• US 4,514,464 A
• Filed: 12/07/1983
• Issued: 04/30/1985
• Est. Priority Date: 12/07/1983
• Status: Expired due to Fees

• Current Assignee: Monsanto Company (Bayer AG)
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Gomez, I. Luis
• Primary Examiner(s): HERBERT JR, THOMAS
• Application Number:
  US06/559,069
• Time in Patent Office: 510 Days
• Field of Search: 428/437, 428/412, 428/424.6, 428/425.6, 428/423.1, 428/522, 156/106, 156/327, 156/331.4, 156/333
• US Class Current: 327/546
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 2333/12 Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B32B 2369/00 Polycarbonates
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08K 5/103 with polyalcohols
• 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 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

Low temperature impact delamination of laminates containing adjacent layers of polycarbonate or polyacrylate and polyvinyl butyral is overcome by a flexible, hydrophobic, adhesive coating of poly-vinylidene chloride or urethane acrylate resin at the interface between the polycarbonate or polyacrylate and the polyvinyl butyral.

Claims

1. A laminate comprising a sheet of polycarbonate or polyacrylate, a sheet of polyvinyl butyral plasticized with a plasticizer which does not significantly craze said polycarbonate or polyacrylate when said plasticized polyvinyl butyral contacts said polycarbonate or polyacrylate and a layer of polyvinylidene chloride or cured urethane acrylate resin interposed between the interfacial surfaces of said sheet of polycarbonate or polyacrylate and said sheet of polyvinyl butyral for bonding said sheets together and resisting delamination on impact at temperatures at least as low as about minus 10°

C.

2. The laminate of claim 1 wherein said interposed layer is polyvinylidene chloride.

3. The laminate of claim 1 wherein said interposed layer is urethane acrylate resin.

4. The laminate of claim 1, 2 or 3 wherein the thickness of said interposed layer is about 0.013 to 0.13 mm.

5. The laminate of claim 4 wherein the plasticizer in the polyvinyl butyral sheet comprises (a) a multiester of an alcohol having 2 to 4 hydroxyl groups and a C₁₀ to C₂₀ unsaturated fatty acid having a hydroxyl group attached to the acid molecule and (b) a monoester of a glycol and such C₁₆ to C₂₀ unsaturated fatty acid.

6. The laminate of claim 5 wherein the monoester is propylene glycol-1,2 monoricinoleate.

7. The laminate of claim 1 wherein said interposed layer is hydrophobic.