Patent US4942219A successfully refreshed from Google Patents.
US4942219A
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Viscoelastic resin for vibration damping material and composition containing the same
Assignee: Nippon Steel Corp
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Filing: 1988-10-20
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Granted: 1990-07-17
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Expires: 2008-10-20
Abstract
Abstract The use of an amorphous block copolyester resin as a viscoelastic resin for a composite vibration damping material, and a viscoelastic resin composition for a composite vibration damping material which comprises the amorphous block copolyester resin and at least one compound selected from the group consisting of polyepoxy compounds, polyisocyanate compounds and acid anhydrides.
Inventors
- 👤 Takeshi Yatsuka
- 👤 Seiji Yamazoe
- 👤 Hiroshi Hirakouchi
- 👤 Yutaka Mizumura
- 👤 Hiroshi Endo
- 👤 Nobuo Kadowaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:50
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B27/00; B32B27/36; B32B27/06; B32B27/08; B32B27/38; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4286; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08G63/60; C08L; C08L67/00; C08L67/04; F; F16; F16F; F16F1/00; F16F1/36; F16F1/3605; B32B2307/00; B32B2307/50; B32B2307/56; B32B2307/70; B32B2307/702; B32B2363/00; B32B2367/00; C08G2350/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
In a vibration damping material of composits laminate structure containing a resin middle layer, the improvement which comprises inclusion of an amorphous block copolyester resin as said resin middle layer, wherein properties of the amorphous block copolyester resin include no clear melting peak appearing in measurement by differential scanning calorimetry of the amorphous block copolyester resin at a temperature rising rate of 10° C./minute in a nitrogen atmosphere, and a reduced viscosity not less than 0.4 dl/g.
Claim 2
Dependent Claim
77 words
In a vibration damping material of composits laminate structure containing a resin middle layer, the improvement which comprises inclusion of an amorphous block copolyester resin as said resin middle layer, wherein properties of the amorphous block copolyester resin include no clear melting peak appearing in measurement by differential scanning calorimetry of the amorphous block copolyester resin at a temperature rising rate of 10° C./minute in a nitrogen atmosphere, and a reduced viscosity not less than 0.4 dl/g.
Claim 3
Dependent Claim
79 words
The use according to claim 1, wherein the amorphous block copolyester resin comprises a block segment having a higher glass transition temperature and a block segment having a lower glass transition temperature, the glass transition temperature of said higher glass transition temperature segment is not lower than 40° C. and the difference between the glass transition temperature of said higher glass transition temperature segment and that of said lower glass transition temperature segment is not less than 50° C.
Claim 4
Dependent Claim
32 words
The use according to claim 1, wherein the amorphous block copolyester resin is obtained from a polyester by ring opening addition polymerization with a lactone at the terminal end of the polyester.
Claim 5
Dependent Claim
23 words
The use according to claim 3, wherein the lactone is a member selected from the group consisting of δ-valerolactone, ε-caprolactone, β-propiolactone, and β-2,2-dimethylpropiolactone.
Claim 6
Dependent Claim
18 words
The use according to claim 2, wherein the block segment having lower glass transition temperature is a polylactone.
Claim 7
Dependent Claim
20 words
The use according to claim 1, wherein the amorphous block copolyester has a reduced viscosity of 0.4 to 1.8 dl/g.
Claim 8
Dependent Claim
37 words
The use according to claim 1, wherein the amorphous block copolyester contains a tri- or higher polyfunctional ester forming component and the content of the component is 10 to 200 equivalent per 106 g of the resin.
Claim 9
Dependent Claim
82 words
A viscoelastic resin composition for a composite vibration damping material which comprises an amorphous block copolyester resin and at least one compound selected from the group consisting of polyepoxy compounds, polyisocyanate compounds and acid anhydrides, wherein properties of the amorphous block copolyester resin include no clear melting peak appearing in measurement by differential scanning calorimetry of the amorphous block copolyester resin at a temperature rising rate of 10° C./minute in a nitrogen atmosphere, and a reduced viscosity not less than 0.4 dl/g.
Claim 10
Dependent Claim
82 words
A viscoelastic resin composition for a composite vibration damping material which comprises an amorphous block copolyester resin and at least one compound selected from the group consisting of polyepoxy compounds, polyisocyanate compounds and acid anhydrides, wherein properties of the amorphous block copolyester resin include no clear melting peak appearing in measurement by differential scanning calorimetry of the amorphous block copolyester resin at a temperature rising rate of 10° C./minute in a nitrogen atmosphere, and a reduced viscosity not less than 0.4 dl/g.
Claim 11
Dependent Claim
79 words
A composition according to claim 8, wherein the amorphous block copolyester resin comprises a block segment having a higher glass transition temperature and a block segment having a lower glass transition temperature, the glass transition temperature of said higher glass transition temperature segment is not lower than 40° C. and the difference between the glass transition temperature of said higher glass transition temperature segment and that of said lower glass transition temperature segment is not less than 50° C.
Claim 12
Dependent Claim
32 words
A composition according to claim 8, wherein the amorphous block copolyester resin is obtained from a polyester by ring opening addition polymerization with a lactone at the terminal end of the polyester.
Claim 13
Dependent Claim
23 words
A composition according to claim 10, wherein the lactone is a member selected from the group consisting of δ-valerolactone, ε-caprolactone, β-propiolactone, and β-2,2-dimethylpropiolactone.
Claim 14
Dependent Claim
18 words
A composition according to claim 9, wherein the block segment having lower glass transition temperature is a polylactone.
Claim 15
Dependent Claim
20 words
A composition according to claim 8, wherein the amorphous block copolyester has a reduced viscosity of 0.4 to 1.8 dl/g.
Claim 16
Dependent Claim
38 words
A composition according to claim 8, wherein the amorphous block copolyester contains a tri- or higher polyfunctional ester forming component and the content of the component is 10 to 200 equivalent per 10 6 g of the resin.
Claim 17
Dependent Claim
16 words
A vibration damping material as claimed in claim 1, wherein metal plates surround said middle layer.
References Cited (Backward Citations)
JPS5226554B2
Cited
JPS50143880A
Cited
JPS5191981A
Cited
JPS5193770A
Cited
JPS5527975B2
Cited
JPS56159160A
Cited
JPS5734949A
Cited
EP0070118A1
Cited
US4584353A
Cited
US4623586A
Cited
US4740427A
Cited
US4766028A
Cited
JPS6274645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |