Method for making safety or impact resistant laminates

• US 4,683,172 A
• Filed: 08/14/1984
• Issued: 07/28/1987
• Est. Priority Date: 08/14/1984
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: LeGrand, Donald G., Olszewski, William V.
• Primary Examiner(s): Ives, P. C.
• Application Number:
  US06/640,615
• Time in Patent Office: 1,078 Days
• Field of Search: 428/412, 428/429, 428/447, 428/437, 156/99, 156/103, 156/104, 156/106, 156/306.6
• US Class Current: 428/412
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10743 containing acrylate (co)polymers or salts thereof
• CPC Class Codes: B32B 17/10752 containing polycarbonate
• CPC Class Codes: B32B 2369/00 Polycarbonates
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: F41H 5/0407 Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66
• CPC Class Codes: F41H 5/0478 Fibre- or fabric-reinforced layers in combination with plastics layers
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31518 Next to glass or quartz
• CPC Class Codes: Y10T 428/31533 Of polythioether
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31917 Next to polyene polymer

Abstract

Safety or impact resistant laminates which avoid the application of heat and excessive pressure in their construction comprising a plurality of laminae, at least one interlayer interposed between any two of the laminae, and a sufficient number of adhesive layers, at least one a contact or pressure sensitive adhesive, to bond all the laminae and interlayers.

Claims

1. A safety or impact resistant optically transparent laminate comprising

(a) a plurality of laminae, at least one of which is a rigid lamina

(b) at least one single interlayer interposed between any two of said laminae

(c) a sufficient number of contact or pressure sensitive adhesive layers to bond all of said laminae and said interlayers, at least one of which adhesive layers is positioned adjacent to at least one of said interlayers.

2. A safety or impact resistance optically transparent laminate comprising

(a) a rigid lamina

(b) at least one flexible lamina

(c) at least on single interlayers interposed between any two of said laminae

(d) a sufficient number of contact or pressure sensitive ahesive layers to bond all of said laminae and said interlayers.

3. The safety laminate of claim 2 wherein a single interlayer is interposed between all laminae.

4. The laminate of claim 3 wherein said rigid lamina is of glass, said at least one flexible lamina is of polycarbonate, and asid interlayer is of polydiorganosiloxane-polycarbonate block copolymer.

5. A method for constructing safety or impact resistant optically transparent laminates comprising the steps of:

(a) bringing into layered contact in such a way as to allow air to escape

(i) a rigid lamina

(ii) at least one flexible lamina

(iii) a sufficient number of interlayers to have a single interlayer interposed between all laminae

(iv) a sufficient number of contact or pressure sensitive adhesive layers to have a single such adhesive layer interposed between all laminae and interlayers;

whereby a alyered composite is formed; and

(b) applying sufficient pressure at ambient temperatures to said layered composite to activate said contact or pressure sensitive adhesive layerand bond the laminate.