Patent US5063253A successfully refreshed from Google Patents.
US5063253A
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US
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Process for the production of cold-setting flexible polyurethane foams with excellent damping properties
Assignee: Bayer AG
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Filing: 1990-03-30
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Granted: 1991-11-05
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Expires: 2010-03-30
Abstract
Abstract This invention relates to a process for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting a polyisocyanate in the presence of water with (a) at least one polyether having an OH number of from 20 to 60 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; (b) a polyether or polyester having an OH number of from 150 to 400 and containing at least two OH groups; and (c) a polyether different from components (a) and (b) having an OH number of from 20 to 200 and containing at least two OH groups, wherein said polyether is based on propylene oxide and ethylene oxide and has an ethylene oxide content above 50% by weight based on the total amount of propylene oxide and ethylene oxide.
Inventors
- 👤 Peter Gansen
- 👤 Rudi Wolfgramm
- 👤 Klaus D. Wolf
- 👤 John J. Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/08; C08G18/10; C08G18/12; C08G18/4009; C08G18/4018; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2350/00; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
199 words
A process for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting a polyisocyanate in the presence of water with a) at least one polyether having an OH number of from 20 to 60 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; b) a polyether or polyester having an OH number of from 150 to 400 and containing at least two OH groups, wherein said component b) is used in a quantity of from 10 to 20% by weight based on the total amount of components a), b), and c); and c) a polyether different from components a) and b) having an OH number of from 20 to 200 and containing at least two OH groups, wherein said polyether is based on propylene oxide and ethylene oxide and has an ethylene oxide content above 50% by weight based on the total amount of propylene oxide and ethylene oxide, wherein said component c) is used in a quantity of from 30 to 70% by weight based on the total amount of components a), b), and c).
Claim 2
Dependent Claim
199 words
A process for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting a polyisocyanate in the presence of water with a) at least one polyether having an OH number of from 20 to 60 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; b) a polyether or polyester having an OH number of from 150 to 400 and containing at least two OH groups, wherein said component b) is used in a quantity of from 10 to 20% by weight based on the total amount of components a), b), and c); and c) a polyether different from components a) and b) having an OH number of from 20 to 200 and containing at least two OH groups, wherein said polyether is based on propylene oxide and ethylene oxide and has an ethylene oxide content above 50% by weight based on the total amount of propylene oxide and ethylene oxide, wherein said component c) is used in a quantity of from 30 to 70% by weight based on the total amount of components a), b), and c).
Claim 3
Dependent Claim
28 words
A process according to claim 1 wherein the polyisocyanate is reacted with components a), b), and c) in the presence of d) one or more auxiliaries or additives.
Claim 4
Dependent Claim
22 words
A process according to claim 2 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or combination thereof.
Claim 5
Dependent Claim
49 words
A process according to claim 1 wherein the polyisocyanate is reacted with component c) in a first stage to form a prepolymer containing isocyanate groups and wherein said prepolymer is further reacted with components a) and b) in the presence of water and one or more auxiliaries or additives.
Claim 6
Dependent Claim
23 words
A process according to claim 4 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
Claim 7
Dependent Claim
49 words
A process according to claim 1 wherein the polyisocyanate is reacted with component a) in a first stage to form a prepolymer containing isocyanate groups and wherein said prepolymer is further reacted with components b) and c) in the presence of water and one or more auxiliaries or additives.
Claim 8
Dependent Claim
23 words
A process according to claim 6 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
Claim 9
Dependent Claim
53 words
A process according to claim 1 wherein the components a), b), and c) are reacted with only a portion of the polyisocyanate to form a hydroxyl-containing prepolymer and wherein said prepolymer is further reacted with the remaining portion of the polyisocyanate in the presence of water and one or more auxiliaries or additives.
Claim 10
Dependent Claim
23 words
A process according to claim 8 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
Claim 11
Dependent Claim
13 words
A process according to claim 1 wherein the polyisocyanate is an aromatic polyisocyanate.
Claim 12
Dependent Claim
18 words
A process according to claim 1 wherein component a) has an OH number of from 25 to 40.
Claim 13
Dependent Claim
32 words
A process according to claim 1 wherein component b) is an at least trifunctional polyether having an OH number of from 150 to 400, wherein said polyether is based on propylene oxide.
Claim 14
Dependent Claim
18 words
A process according to claim 1 wherein component c) has an OH number of from 25 to 100.
Claim 15
Dependent Claim
224 words
A process according to claim 1 for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting an aromatic polyisocyanate in the presence of water with a) at least one polyether having an OH number of from 25 to 40 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; b) an at least trifunctional polyether having an OH number of from 150 to 400 and containing at least two OH groups, wherein said polyether is based on propylene oxide, wherein said component b) is used in a quantity of from 10 to 20% by weight based on the total amount of components a), b), and c); and c) a polyether different from components a) and b) having an OH number of from 25 to 100 and containing at least two OH groups, wherein said polyether is based on propylene oxide and ethylene oxide and has an ethylene oxide content above 50% by weight based on the total amount of propylene oxide and ethylene oxide, wherein said component c) is used in a quantity of from 30 to 70% by weight based on the total amount of components a), b), and c), in the presence of d) one or more auxiliaries or additives.
Claim 16
Dependent Claim
49 words
A process according to claim 14 wherein the polyisocyanate is reacted with component c) in a first stage to form a prepolymer containing isocyanate groups and wherein said prepolymer is further reacted with components a) and b) in the presence of water and one or more auxiliaries or additives.
Claim 17
Dependent Claim
23 words
A process according to claim 15 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
Claim 18
Dependent Claim
49 words
A process according to claim 14 wherein the polyisocyanate is reacted with component a) in a first stage to form a prepolymer containing isocyanate groups and wherein said prepolymer is further reacted with components b) and c) in the presence of water and one or more auxiliaries or additives.
Claim 19
Dependent Claim
23 words
A process according to claim 17 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
Claim 20
Dependent Claim
53 words
A process according to claim 14 wherein the components a), b), and c) are reacted with only a portion of the polyisocyanate to form a hydroxyl-containing prepolymer and wherein said prepolymer is further reacted with the remaining portion of the polyisocyanate in the presence of water and one or more auxiliaries or additives.
Claim 21
Dependent Claim
23 words
A process according to claim 19 wherein the auxiliary or additive is an organic blowing agent, catalyst, foam stabilizer, or a combination thereof.
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) | 1994-11-04 | 1995-05-06 | 1995-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-04 | 1999-05-06 | 1999-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-04 | 2003-05-06 | 2003-11-05 | $7700.00 | Window Closed / Lapsed |