US4511627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich glasses
Assignee: Bridgestone Corp
•
Filing: 1982-10-07
•
Granted: 1985-04-16
•
Expires: 2002-10-07
Abstract
Abstract A sandwich glass comprising glass plates and an intermediate layer interposed therebetween is disclosed. The intermediate layer is formed by crosslinking or photocrosslinking a resin composition comprising an ethylenevinyl acetate copolymer and an organic peroxide or a photosensitizer under heating of the resin composition above the melting point of the copolymer.
Inventors
- 👤 Itsuo Tanuma
- 👤 Hideo Takeichi
- 👤 Yukio Fukuura
- 👤 Tomio Ohyachi
- 👤 Kazuo Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; B32B17/10853; B32B17/10009; B32B17/10036; B32B17/1055; B32B17/10688; B32B17/10697; B32B17/10788; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/28; C08L2666/34; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31645; Y10T428/31649; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
118 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by crosslinking a resin composition comprising: (a) an ethylene-vinyl acetate copolymer having a vinyl acetate content of 15%-50% by weight, (b) an organic peroxide selected from at least one member of the group consisting of 2-5-, dimethyl-2, 5-di(t-butylperoxy)hexane-3, t-butylcymyl peroxide, 2,5-dimethyl-2, 5-di(t-butylperoxy)hexane, dicumyl peroxide, α,α'bis(t-butylperoxyisopropyl)benzene, n-butyl-4,4-bis(t-butylperoxy)valerate, 2,2-bis(t-butylperoxy)butane, 1,1-bis(t-butylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)3,3,5-trimethyl cyclohexane and t-butylperoxy benzoate, and (c) a curing assistant selected from at least one member of the group consisting of acryloyloxy group-containing compounds, methacryloyloxy group-containing compounds, allyl group-containing compounds and vinyl group-containing compounds wherein said curing assistant is not a silane compound, at a temperature above the melting point of the copolymer.
Claim 2
Dependent Claim
118 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by crosslinking a resin composition comprising: (a) an ethylene-vinyl acetate copolymer having a vinyl acetate content of 15%-50% by weight, (b) an organic peroxide selected from at least one member of the group consisting of 2-5-, dimethyl-2, 5-di(t-butylperoxy)hexane-3, t-butylcymyl peroxide, 2,5-dimethyl-2, 5-di(t-butylperoxy)hexane, dicumyl peroxide, α,α'bis(t-butylperoxyisopropyl)benzene, n-butyl-4,4-bis(t-butylperoxy)valerate, 2,2-bis(t-butylperoxy)butane, 1,1-bis(t-butylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)3,3,5-trimethyl cyclohexane and t-butylperoxy benzoate, and (c) a curing assistant selected from at least one member of the group consisting of acryloyloxy group-containing compounds, methacryloyloxy group-containing compounds, allyl group-containing compounds and vinyl group-containing compounds wherein said curing assistant is not a silane compound, at a temperature above the melting point of the copolymer.
Claim 3
Dependent Claim
98 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by photocrosslinking a resin composition comprising: (a) an ethylene-vinyl acetate copolymer having a vinyl acetate content of 15-50% by weight, (b) a photosensitizer, and (c) a curing assistant selected from at least one member of the group consisting of acryloyloxy group-containing compounds, methacryloyloxy group-containing compounds, allyl group-containing compounds and vinyl group-containing compounds wherein said curing assistant is not a silane compound, under light irradiation during or after heating said resin composition at a temperature above the melting point of the copolymer.
Claim 4
Dependent Claim
98 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by photocrosslinking a resin composition comprising: (a) an ethylene-vinyl acetate copolymer having a vinyl acetate content of 15-50% by weight, (b) a photosensitizer, and (c) a curing assistant selected from at least one member of the group consisting of acryloyloxy group-containing compounds, methacryloyloxy group-containing compounds, allyl group-containing compounds and vinyl group-containing compounds wherein said curing assistant is not a silane compound, under light irradiation during or after heating said resin composition at a temperature above the melting point of the copolymer.
Claim 5
Dependent Claim
35 words
A sandwich glass according to claim 1, wherein said organic peroxide is added in an amount of not more than 5 parts by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
43 words
A sandwich glass according to claim 1, wherein said resin composition further contains 0.5-30 parts by weight of a plasticizer selected from high-purity paraffinic oil, naphthenic oil, phthalate ester, adipate ester, sebacate ester, thioglycol, dibenzyl ether, tricresyl phosphate, dioctyl maleate and epoxy plasticizer.
Claim 7
Dependent Claim
27 words
A sandwich glass according to claim 1, wherein said curing assistant is contained in an amount of not more than 50% by weight in said resin composition.
Claim 8
Dependent Claim
23 words
A sandwich glass according to claim 1, wherein said resin composition contains not more than 5% by weight of a silane coupling agent.
Claim 9
Dependent Claim
42 words
A sandwich glass according to claim 2, wherein said photosensitizer is at least one substance selected from benzoin, benzophenone, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, dibenzyl, 5-nitro acetonaphthene, hexachloro cyclopentadiene, p-nitrodiphenyl, p-nitroaniline, 2,4,6-trinitroaniline, 1,2-benzanthraquinone and 3-methyl-1,3-diaza-1,9-benzanthrone.
Claim 10
Dependent Claim
34 words
A sandwich glass according to claim 2, wherein said photosensitizer is added in an amount of not more than 5 parts by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer.
Claim 11
Dependent Claim
43 words
A sandwich glass according to claim 2, wherein said resin composition further contains 0.5-30 parts by weight of a plasticizer selected from high-purity paraffinic oil, naphthenic oil, phthalate ester, adipate ester, sebacate ester, thioglycol, dibenzyl ether, tricresyl phosphate, dioctyl maleate and epoxy plasticizer.
Claim 12
Dependent Claim
27 words
A sandwich glass according to claim 2, wherein said curing assistant is contained in an amount of not more than 50% by weight in said resin composition.
Claim 13
Dependent Claim
23 words
A sandwich glass according to claim 2, wherein said resin composition contains not more than 5% by weight of a silane coupling agent.
References Cited (Backward Citations)
US4319811A
Cited
US4309484A
Cited
US4338227A
Cited
US3488715A
Cited
US3622440A
Cited
US3666614A
Cited
US4303739A
Cited
US4137364A
Cited
US4317862A
Cited
US4296017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |