Sandwich glass

• US 5,094,918 A
• Filed: 12/10/1990
• Issued: 03/10/1992
• Est. Priority Date: 12/11/1989
• Status: Expired due to Term

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Segawa, Masashi, Tanuma, Itsuo, Naito, Kazuo, Niwa, Hideyuki
• Primary Examiner(s): Cashion, Jr., Merrell C.
• Assistant Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US07/624,870
• Time in Patent Office: 456 Days
• Field of Search: 428/429, 428/440, 428/441, 428/442, 428/911
• US Class Current: 428/440
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B32B 17/10697 being cross-linked
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: Y10S 428/911 Penetration resistant layer
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31641 Next to natural rubber, gum, oil, rosin, wax, bituminous or tarry residue
• 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

Abstract

A sandwich glass comprises two glass plate and a resin layer interposed therebetween. In this case, the resin layer is produced by adding a hydrocarbon resin and an organic peroxide to ethylene-vinyl acetate copolymer and thermosetting them.

Claims

1. A sandwich glass comprising two glass plates and a resin layer interposed therebetween, and produced by interposing a thermosetting resin layer comprised of ethylene-vinyl acetate copolymer, hydrocarbon resin and organic peroxide between said two glass plates and then thermosetting said resin layer.

2. The sandwich glass according to claim 1, wherein amounts of said hydrocarbon resin and organic peroxide added to said ethylene-vinyl acetate copolymer are 1-100 parts by weight and 0.1-5 parts by weight, respectively.

3. The sandwich glass according to claim 1, wherein said hydrocarbon resin has a weight average molecular weight of 200-50000.

4. The sandwich glass according to claim 1, wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of 10-50% by weight.

5. The sandwich glass according to claim 1, wherein at least one of acryloxy group-containing compound, methacryloxy group-containing compound and aryl group-containing compound is added in an amount of not more than 50 parts by weight to said ethylene-vinyl acetate copolymer as a curing aid.

6. The sandwich glass according to claim 1, wherein a silane coupling agent is added as an adhesion improver for glass in an amount of not more than 5 parts by weight to said ethylene-vinyl acetate copolymer.

7. The sandwich glass according to claim 1, wherein said hydrocarbon resin is selected from the group consisting of natural resins and synthetic resins.

8. The sandwich glass according to claim 7, wherein said natural resin is selected from the group consisting of rosin, rosin derivatives, terpene resin, dammar, copal and shellac.

9. The sandwich glass according to claim 8, wherein said rosin is selected from the group consisting of gum resin, tar oil resin and wood resin.

10. The sandwich glass according to claim 8, wherein said rosin derivative is selected from the group consisting of hydrogenated rosin, disproportionated rosin, rosin polymer, rosin ester and metal salt of rosin.

11. The sandwich glass according to claim 8, wherein said terpene resin is selected from alpha-pinene, beta-pinene and terpene phenol resin.

12. The sandwich glass according to claim 7, wherein said synthetic resins are selected from the group consisting of petroleum resin, phenolic resins and xylene resin.

13. The sandwich glass according to claim 12, wherein said petroleum resin is selected from the group consisting of aliphatic petroleum resin, aromatic petroleum resin, alicyclic petroleum, copolymeric petroleum resin, hydrogenated petroleum resin, pure monomeric petroleum resin and cumarin indene.

14. The sandwich glass according to claim 12, wherein said phthalate resin is selected from the group consisting of alkyl phenol, and modified phenolic resins.

15. The sandwich glass according to claim 12, wherein said xylene resin is a modified xylene resin.