Patent US4186234A successfully refreshed from Google Patents.
US4186234A
Expired / Lapsed
US
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Light transmissible high density elastic resin composition
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1978-04-17
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Granted: 1980-01-29
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Expires: 1998-04-17
Abstract
Abstract A translucent, high density elastic resin composition which comprises 100 wt. parts of a thermoplastic resin or a mixture of a plasticizer and a thermoplastic resin, and 100-500 wt. parts of a powdered glass having a refractive index of N D =1.5-2.2. This composition is suitable for fabricating translucent soundbarriers.
Inventors
- 👤 Kazumi Sakashita
- 👤 Kenji Hiratsuka
- 👤 Yutaka Umezu
- 👤 Nobuo Nakamura
- 👤 Haruhisa Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:08
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/165; C; C04; C04B; C04B26/00; C04B26/02; C08; C08K; C08K3/00; C08K3/40; C08K7/00; C08K7/16; C08K7/18; C08K7/20; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/676
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A light transmissible, high density elastic resin composition having a specific gravity greater than 1.8 and which is a sound barrier, which comprises: 100 wt. parts of a thermoplastic resin or a mixture of a thermoplastic resin and a plasticizer and 100 to 500 wt. parts of a spherical lead glass having an average diameter of 40 to 120 μm and a refractive index N D of 1.5 to 2.2.
Claim 2
Dependent Claim
70 words
A light transmissible, high density elastic resin composition having a specific gravity greater than 1.8 and which is a sound barrier, which comprises: 100 wt. parts of a thermoplastic resin or a mixture of a thermoplastic resin and a plasticizer and 100 to 500 wt. parts of a spherical lead glass having an average diameter of 40 to 120 μm and a refractive index N D of 1.5 to 2.2.
Claim 3
Dependent Claim
23 words
The light transmissible, high density elastic resin composition of claim 1, wherein the specific gravity of the lead glass is greater than 2.4.
Claim 4
Dependent Claim
23 words
The light transmissible, high density elastic resin composition of claim 2, wherein the specific gravity of the lead glass is greater than 3.0.
Claim 5
Dependent Claim
32 words
The light transmissible, high density elastic resin composition of claim 1, wherein said thermoplastic resin is polyvinylchloride, vinylchloride-vinylacetate copolymer, polyvinylidene chloride, polyethylene, polypropylene, polyvinylacetate, ethylene-vinylacetate copolymer, nylon, a polyester, or a polyurethane.
Claim 6
Dependent Claim
22 words
The light transmissible, high density elastic resin composition of claim 4, wherein said thermoplastic resin has a degree of polymerization of 1000-2500.
Claim 7
Dependent Claim
35 words
The light transmissible, high density elastic resin composition of claim 1, wherein said plasticizer is present in said composition in an amount of 50-150 parts by weight to 100 parts by weight of said resin.
Claim 8
Dependent Claim
47 words
The light transmissible, high density elastic resin composition of claim 1, wherein the difference between the refractive index of the powdered glass and that of the thermoplastic resin or the mixture of the thermoplastic resin and a plasticizer is in a range of 0-0.8 (N D ).
Claim 9
Dependent Claim
14 words
A sheet of the light transmissible, high density elastic resin composition of claim 1.
Claim 10
Dependent Claim
19 words
A sheet of the light transmissible, high density elastic resin composition of claim 7 reinforced with a nonwoven fabric.
Claim 11
Dependent Claim
13 words
A sheet of the light transmissible, high density resin composition of claim 3.
References Cited (Backward Citations)
US2311613A
Cited
GB1044503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |