Patent US2882902A successfully refreshed from Google Patents.
US4367259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound deadening material
Assignee: WRGRACE & Co A CORP OF CT
•
Filing: 1981-07-27
•
Granted: 1983-01-04
•
Expires: 2001-07-27
Abstract
Abstract A sound deadening material is obtained with a very high loading of sound damping materials such as barium sulfate, calcium carbonate or metal powders. These materials are mixed with water and are bound together by adding a water-miscible isocyanate-terminated prepolymer which reacts with the water to form a cross-linked binder.
Inventors
- 👤 Glenn E. Fulmer
- 👤 Louis L. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08K3/02; C08K3/08; C08K3/30; C08G2350/00; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S524/00; Y10S524/916; Y10S528/00; Y10S528/904; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T442/00; Y10T442/20; Y10T442/25
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
61 words
A sound deadening material comprising (a) an elastomeric cross-linked polyurethane binder and (b) substantial amounts of sound deadening particles incorporated therein, werein the weight ratio of b to a is at least 10 which is made by reacting together an aqueous slurry of sound deadening particles and a water-miscible prepolymer which reacts with the water to form elastomeric cross-linked polyurethane binder.
Claim 2
Dependent Claim
61 words
A sound deadening material comprising (a) an elastomeric cross-linked polyurethane binder and (b) substantial amounts of sound deadening particles incorporated therein, werein the weight ratio of b to a is at least 10 which is made by reacting together an aqueous slurry of sound deadening particles and a water-miscible prepolymer which reacts with the water to form elastomeric cross-linked polyurethane binder.
Claim 3
Dependent Claim
13 words
The material according to claim 1, wherein the binder comprises a polyurethane hydrogel.
Claim 4
Dependent Claim
27 words
The material according to claim 1, wherein the sound deadening particles are selected from the group consisting of barium sulfate, calcium carbonate, metal powders, and mixtures thereof.
Claim 5
Dependent Claim
39 words
The material according to claim 1, wherein the binder is formed by the reaction product of a water-miscible prepolymer of a polyether glycol capped with polyisocyanates having a number average molecular weight of about at least 2,000 and water.
Claim 6
Dependent Claim
48 words
The material according to claim 4, wherein the polyether polyol is made of random ethylene oxide units and other alkylene oxide units and wherein the ratio of ethylene oxide units to the total number of ethylene oxide and alkylene oxide units is sufficient to make the prepolymer water-miscible.
Claim 7
Dependent Claim
21 words
The material according to claim 5, wherein the polyether polyol is made of random ethylene oxide units and propylene oxide units.
Claim 8
Dependent Claim
31 words
The material according to claim 4, wherein said prepolymer is present in the reaction mixture in an amount of about 1 to 20 parts by weight per 100 parts of water.
Claim 9
Dependent Claim
18 words
The material according to claim 1, wherein the weight ratio of b to a is at least 20.
Claim 10
Dependent Claim
10 words
The material according to claim 1, further comprising a latex.
Claim 11
Dependent Claim
24 words
The material according to claim 9, wherein the latex is present in an amount up to about 20 times the weight of the binder.
Claim 12
Dependent Claim
30 words
A flexible barrier material capable of reducing sound transmission comprising a sheet structure of woven or nonwoven fibers to which has been applied the sound deadening mateial of claim 1.
Claim 13
Dependent Claim
27 words
The flexible barrier material according to claim 11, further comprising a latex present in an amount of up to about 20 times the weight of the binder.
Claim 14
Independent Claim
65 words
A method of producing a sound deadening, elastomer cross-linked polyurethane composition by reacting together: (a) a water-miscible prepolymer of a polyether polyol capped with polyisocyanates having a number average molecular weight of about at least 2,000 and (b) an aqueous slurry containing sound deadening particles, said prepolymer being present in the reaction in an amount of 1-100 parts by weight per 100 parts of water.
Claim 15
Independent Claim
65 words
A method of producing a sound deadening, elastomer cross-linked polyurethane composition by reacting together: (a) a water-miscible prepolymer of a polyether polyol capped with polyisocyanates having a number average molecular weight of about at least 2,000 and (b) an aqueous slurry containing sound deadening particles, said prepolymer being present in the reaction in an amount of 1-100 parts by weight per 100 parts of water.
Claim 16
Dependent Claim
22 words
The method according to claim 13, wherein the weight reatio of the sound deadening particles to the prepolymer is at least 10.
Claim 17
Dependent Claim
13 words
The method according to claim 14, wherein the ratio is at least 20.
Claim 18
Dependent Claim
27 words
The method according to claim 14, wherein the sound deadening particles are selected from the group consisting of barium sulfate, calcium carbonate, metal powders, and mixtures thereof.
Claim 19
Dependent Claim
11 words
A sound deadening composition made by the method of claim 13.
Claim 20
Dependent Claim
11 words
A sound deadening composition made by the method of claim 16.
References Cited (Backward Citations)
US3652360A
Cited
US3897372A
Cited
US4061618A
Cited
US4010818A
Cited
US4066578A
Cited
US4158087A
Cited
US4110510A
Cited
US4191798A
Cited
US4246146A
Cited
US4241537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |