US4859523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscoelastic resin for vibration damping material
Assignee: Nippon Steel Corp
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Filing: 1987-08-17
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Granted: 1989-08-22
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Expires: 2007-08-17
Abstract
Abstract A viscoelastic resin which comprises a reaction product of: (A) a polyester diol having a molecular weight of 400 to 6,000, at least 60 mol % of the dicarboxylic acid component of which is an aromatic dicarboxylic acid and at least 30 mol % of the glycol component of which is neopentyl glycol or its derivative; (B) an aliphatic polyester diol having a molecular weight of 600 to 6,000; (C) a diisocyanate compound; and (D) a chain extender; said (A), (B), (C) and (D) being reacted in a weight ratio (A):(B):(C) of 100:0 to 150:10 to 100:0 to 30.
Inventors
- 👤 Hiroshi Endoh
- 👤 Yoshimasa Zama
- 👤 Nobuo Kadowaki
- 👤 Takeshi Yatuka
- 👤 Hiroshi Nagai
- 👤 Yutaka Mizumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:44
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/09; B32B15/18; B32B27/00; B32B27/36; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4202; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C09; C09J; C09J175/00; C09J175/04; C09J175/06; F; F16; F16F; F16F9/00; F16F9/30; F16F9/306; B32B2250/00; B32B2250/40; B32B2307/00; B32B2307/50; B32B2307/56; B32B2311/00; B32B2311/30; B32B2375/00; C08G2350/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31551; Y10T428/31605; Y10T428/31678; Y10T428/31786
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A viscoelastic resin which comprises a reaction product of: (A) a polyester diol having a molecular weight of 400 to 6,000, wherein at least 60 mol % of the polyester diol is a dicarboxylic acid component which is an aromatic dicarboxylic acid and at least 30 mol % of the polyester diol is a glycol component which is neopentyl glycol or its derivative; (B) an aliphatic polyester diol having a molecular weight of 600 to 6,000; (C) a diisocyanate compound; and (D) a chain extender; said (A), (B), (C) and (D) being reacted in a weight ratio (A):(B):(C):(D) of 100:0 to 150:10 to 100:0 to 30.
Claim 2
Dependent Claim
106 words
A viscoelastic resin which comprises a reaction product of: (A) a polyester diol having a molecular weight of 400 to 6,000, wherein at least 60 mol % of the polyester diol is a dicarboxylic acid component which is an aromatic dicarboxylic acid and at least 30 mol % of the polyester diol is a glycol component which is neopentyl glycol or its derivative; (B) an aliphatic polyester diol having a molecular weight of 600 to 6,000; (C) a diisocyanate compound; and (D) a chain extender; said (A), (B), (C) and (D) being reacted in a weight ratio (A):(B):(C):(D) of 100:0 to 150:10 to 100:0 to 30.
Claim 3
Dependent Claim
42 words
A viscoelastic resin according to claim 1, wherein the sum of the number of moles of (A), (B) and (D) is 0.7 to 1.2 times as much as that of (C) and the ratio of (A):(B):(D) is 100:0 to 150:3 to 30.
Claim 4
Dependent Claim
24 words
A viscoelastic resin according to claim 2, wherein the sum of the number of moles of (A), (B) and (D) is 0.90 to 0.99.
Claim 5
Dependent Claim
14 words
A viscoeleastic resin according to claim 1, wherein the reactant (B) is polycaprolactone diol.
Claim 6
Dependent Claim
20 words
A viscoelastic resin according to claim 1, wherein the resin has a glass transition temperature of 0° to 70° C.
Claim 7
Dependent Claim
20 words
A viscoelastic resin according to claim 1, wherein the resin has a number average molecular weight of 8,000 to 100,000.
Claim 8
Dependent Claim
26 words
A viscoelastic resin according to claim 1, wherein the chain extender is one or more compounds selected from the group consisting of glycols, diamines, and aminoalcohols.
Claim 9
Dependent Claim
40 words
A viscoelastic resin according to claim 1, wherein the resin has a vibration damping peak temperature of 60° to 120° C. determined by sandwiching it between two steel plates each of which is 0.05 mm in thickness at 500 Hz.
Claim 10
Dependent Claim
33 words
A composite vibration damping steel plate comprising two steel plate layers and a viscoelastic resin middle layer sandwiched between the two steel plate layers, said viscoelastic resin is that claimed in claim 1
Claim 11
Dependent Claim
25 words
A viscoelastic resin according to claim 1, wherein the lower limit of the weight ratio of the aliphatic polyester diol (B) is greater than 0.
Claim 12
Dependent Claim
26 words
A viscoelastic resin according to claims 1 or 10, wherein the lower limit of the weight ratio of the chain extender (D) is greater than 0.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |