Safety glass and prelaminate therefor

• US 4,910,074 A
• Filed: 07/15/1986
• Issued: 03/20/1990
• Est. Priority Date: 08/29/1985
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Miwa, Masayuki, Fukawa, Satoru, Kurita, Koji
• Primary Examiner(s): Schwartz, Pamela R.
• Application Number:
  US06/885,763
• Time in Patent Office: 1,344 Days
• Field of Search: 428/441, 428/335, 428/336, 428/458, 428/461, 428/450, 428/447, 428/458, 428/483, 428/215, 428/409, 428/410, 428/451, 428/480, 428/909, 428/911, 428/913, 428/448, 428/920 , 428/442
• US Class Current: 428/215
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10064 comprising at least two glass sheets, only one of which being an outer layer
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10697 being cross-linked
• CPC Class Codes: B32B 17/10706 being photo-polymerized
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: B32B 17/10853 the membrane being bag-shaped
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10S 428/909 Resilient layer, e.g. printer's blanket
• CPC Class Codes: Y10S 428/911 Penetration resistant layer
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• 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 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers

Abstract

A prelaminate for safety glass comprising a plastic film and an intermediate layer laminated thereon, wherein the intermediate layer is made of a thermosetting or photosetting resin composition comprising an ethylene-vinyl acetate copolymer and a heat curing agent or photosensitizer.

Claims

1. A safety glass consisting essentially of a laminate having a glass sheet bonded to only one side thereof, wherein said laminate comprises a plastic film and an intermediate layer, and wherein said intermediate layer consists of a thermosetting or a photosetting resin composition, said resin composition consisting essentially of an ethylene-vinyl acetate copolymer wherein said ethylene-vinyl acetate copolymer contains from 10-50% by weight vinyl acetate, and a heat curing agent or photosensitizer, wherein said laminate does not contain a glass sheet, and wherein the surface of said plastic film has a rubber hardness in a range from 98.0 to 100.

2. The safety glass according to claim 1, wherein the glass sheet is selected from the group consisting of a non-tempered glass sheet, a tempered glass sheet, a partially tempered glass sheet, and a combination thereof.

3. The safety glass according to claim 1, wherein the plastic film is a polyethylene terephtalate film.

4. The safety glass according to claim 1, wherein a heat ray reflective coating is provided on the plastic film at the side laminated with the intermediate layer.

5. The safety glass according to claim 1, wherein an electrically conductive layer is provided on the plastic film on the side laminated with the intermediate layer.

6. The safety glass according to claim 1, wherein the curing agent in the intermediate layer is a peroxide.

7. The safety glass according to claim 1, wherein the intermediate layer has a thickness of from 0.05 to 2 mm.

8. The safety glass according to claim 1, wherein the plastic film has a thickness of from 0.05 to 1.0 mm.

9. The safety glass according to claim 1 wherein the glass sheet is a laminated glass sheet.

10. A safety glass consisting essentially of a laminate having a glass sheet bonded to only one side thereof, wherein said laminate comprises a plastic film and an intermediate layer, and wherein said intermediate layer consists of a thermosetting or photosetting resin composition, said resin composition consisting essentially of an ethylene-vinyl acetate copolymer, wherein said ethylene-vinyl acetate copolymer contains from 14-40% by weight vinyl acetate, and a heat curing agent or photosensitizer, wherein said laminate does not contain a glass sheet, the surface of said plastic film has a rubber hardness in the range from 98.0-100, and wherein a hard surface layer comprising an organopolysiloxane, inorganic silica, or a composite of inorganic silica and an organopolysiloxane, said hard surface layer having a thickness between about 0.5-50 microns is provided on the plastic film at the side opposite to the intermediate layer.

11. The safety glass according to claim 10, wherein a heat ray reflective layer is provided on the plastic film at the side opposite to the intermediate layer, and a hard surface layer comprising an organopolysiloxane, inorganic silica, or a composite of inorganic silica and an organopolysiloxane, said hard surface layer having a thickness between about 0.5-50 microns is provided on the heat ray reflective layer.

12. The safety glass of claim 11, wherein said hard surface layer comprises an organopolysiloxane.

13. The safety glass according to claim 10, wherein an electrically conductive layer is provided on the plastic film at the side opposite to the intermediate layer, and a hard surface layer comprising an organopolysiloxane, inorganic silica, or a composite of inorganic silica and an organopolysiloxane, said hard surface layer having a thickness of between about 0.5-50 microns is provided on the conductive layer.

14. The safety glass according to claim 13, wherein said hard surface layer comprises an organopolysiloxane.

15. The safety glass of claim 10, wherein said hard surface layer comprises an organopolysiloxane.