US4317862A
Expired / Lapsed
US
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Sandwich glass
Assignee: Bridgestone Corp
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Filing: 1979-12-28
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Granted: 1982-03-02
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Expires: 1999-12-28
Abstract
Abstract A sandwich glass having an intermediate layer formed of a photosensitive resin consisting mainly of an acryloyloxy group- or methacryloyloxy group-containing high polymer and at least one of acrylic acid, methacrylic acid and acryloyloxy group- or methacryloyloxy group-containing compound is excellent in the adhesion between the intermediate layer and the glass plates and has high impact absorbing ability, light resistance and heat resistance.
Inventors
- 👤 Toshio Honda
- 👤 Itsuo Tanuma
- 👤 Masao Ogawa
- 👤 Hikaru Ishikawa
- 👤 Yukio Fukuura
- 👤 Setsuo Akiyama
- 👤 Shozo Ojima
- 👤 Kazuo Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:49
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10688; B32B17/10009; B32B17/10036; B32B17/10706; B32B17/10743; B32B27/00; B32B27/30; B32B27/308; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/50; B32B2307/56; B32B2307/70; B32B2307/71; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31855; Y10T428/31931; Y10T428/31935
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by photosetting a photosensitive resin consisting essentially of a high polymer having acryloyloxy group- or methacryloyloxy group-containing groups represented by the following formulae (I)-(III), ##STR3## wherein R represents a hydrogen atom or methyl group, n represents a positive integer of 2-5, m represents a positive integer of 1-4 and l represents a positive integer of 1-30, which is obtained by adding acrylic acid, methacrylic acid, or ester thereof, having a terminal active hydrogen atom, to a high polymer having olefinically unsaturated double bonds in in the presence of an alkyl hypohalite or a N-haloamide compound, and at least one acryloyloxy group- or methacryloyloxy group-containing compound selected from acrylic acid, methacrylic acid and their derivatives, and wherein the mixing ratio of the high polymer to the acryloyloxy group- or methacryloyloxy group-containing compound is within the range of 90/10-5/95 in weight ratio and the amount of the acrylolyoxy or methacryloyloxy groups in the high polymer is at least one group per 50,000 of the high polymer molecular weight.
Claim 2
Dependent Claim
183 words
A sandwich glass comprising glass plates and an intermediate layer interposed therebetween, said intermediate layer being formed by photosetting a photosensitive resin consisting essentially of a high polymer having acryloyloxy group- or methacryloyloxy group-containing groups represented by the following formulae (I)-(III), ##STR3## wherein R represents a hydrogen atom or methyl group, n represents a positive integer of 2-5, m represents a positive integer of 1-4 and l represents a positive integer of 1-30, which is obtained by adding acrylic acid, methacrylic acid, or ester thereof, having a terminal active hydrogen atom, to a high polymer having olefinically unsaturated double bonds in in the presence of an alkyl hypohalite or a N-haloamide compound, and at least one acryloyloxy group- or methacryloyloxy group-containing compound selected from acrylic acid, methacrylic acid and their derivatives, and wherein the mixing ratio of the high polymer to the acryloyloxy group- or methacryloyloxy group-containing compound is within the range of 90/10-5/95 in weight ratio and the amount of the acrylolyoxy or methacryloyloxy groups in the high polymer is at least one group per 50,000 of the high polymer molecular weight.
Claim 3
Dependent Claim
22 words
A sandwich glass according to claim 1, wherein the derivative of acrylic acid or methacrylic acid is an ester or amide thereof.
Claim 4
Dependent Claim
16 words
A sandwich glass according to claim 1, wherein the high polymer has olefinically unsaturated double bonds.
Claim 5
Dependent Claim
15 words
A sandwich glass according to claim 1, wherein the high polymer is elastomeric high polymer.
Claim 6
Dependent Claim
33 words
A sandwich glass according to claim 1, wherein the amount of the acryloyloxy or methacryloyloxy groups in the high polymer is at least one group per 20,000 of the high polymer molecular weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |