US4839397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane soft foam with sound insulating and vibration damping properties
Assignee: Dr Alois Stankiewicz GmbH
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Filing: 1988-03-29
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Granted: 1989-06-13
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Expires: 2008-03-29
Abstract
Abstract The present invention relates to polyurethane foam materials with sound insulating and vibration damping properties. They are obtainable by reacting a polyisocyanate or polyisocyanate prepolymers with an excess of polyols or a mixture thereof while maintaining an NCO index of ≦80, in particular ≦70 and as a result they have an adhesive (frictional) surface and are further characterized by a density of 80 to 250 kg/m 3 , a modulus of elasticity less than 300 OOO N/m 2 and a loss factor of at least 0.4. The production is preferably done by adding the reaction components (polyol system on the one hand and polyisocyanate system on the other) to the mixture head of an RIM machine. The polyurethane soft foam materials with an adhesive surface according to the invention are particularly suitable for use as vibration damping sound insulation systems in automobiles.
Inventors
- 👤 Ernst Lohmar
- 👤 Gerhard Burak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:37
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B32B27/00; B32B27/12; B32B27/40; B32B5/02; B32B5/022; B32B5/22; B32B5/24; B32B5/245; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/02; B32B2305/022; B32B2305/10; B32B2305/20; B32B2307/00; B32B2307/10; B32B2307/102; B32B2375/00; B32B2605/00; B32B2605/003; B60; B60R; B60R13/00; B60R13/08; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0058; C08G2110/0075; C08G2120/00; C08G2350/00; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
70 words
Polyurethane foam materials with sound insulating and vibration damping properties, obtainable by reacting a polyisocyanate or polyisocyanate prepolymer with an excess of polyols or mixtures thereof whilst maintaining an NCO index of ≦80, for the purpose of obtaining an adhesive surface and further characterized by a density of 80 to 250 kg/m 3 , a modulus of elasticity of <300,000 N/m 2 and a loss factor of at least 0.4.
Claim 2
Dependent Claim
70 words
Polyurethane foam materials with sound insulating and vibration damping properties, obtainable by reacting a polyisocyanate or polyisocyanate prepolymer with an excess of polyols or mixtures thereof whilst maintaining an NCO index of ≦80, for the purpose of obtaining an adhesive surface and further characterized by a density of 80 to 250 kg/m 3 , a modulus of elasticity of <300,000 N/m 2 and a loss factor of at least 0.4.
Claim 3
Dependent Claim
53 words
A process of producing a polyurethane soft foam material according to claim 1, characterized in that the components containing a polyisocyanate or polyisocyanate prepolymer are caused to react with the components containing an excess of polyols whilst maintaining an NCO index of <80, by feeding into the mixture head of a RIM arrangement.
Claim 4
Dependent Claim
44 words
An article of manufacture comprising a polyurethane soft foam material with an adhesive surface adhered to a substrate as an insulation system for damping sound insulation, where said substrate optionally contains a layer selected from the group of a heavy layer or a carpet.
Claim 5
Dependent Claim
44 words
An article of manufacture comprising a polyurethane soft foam material with an adhesive surface adhered to a substrate as an insulation system for damping sound insulation, where said substrate optionally contains a layer selected from the group of a heavy layer or a carpet.
Claim 6
Dependent Claim
40 words
The article according to claim 3, characterized in that when a carpet is laid on the insulation system a decoupler of soft elastic, predominantly open pored material is arranged between the heavy layer of the insulation system and the carpet.
Claim 7
Dependent Claim
16 words
The article according to claim 4, characterized in that the decoupler consists essentially of foam material.
Claim 8
Dependent Claim
19 words
The article according to claim 4, characterized in that the decoupler consists essentially of acoustically effective fleece or felt.
Claim 9
Dependent Claim
20 words
The article according to claim 4, characterized in that the decoupler is thin, in the region of about 5 mm.
Claim 10
Dependent Claim
22 words
The article according to claim 4, characterized in that the layers subsequently added and held by adhesive forces have acoustic damping properties.
Claim 11
Dependent Claim
22 words
The article according to claim 3, characterized in that the adhesive coating is formed over the whole or part of said substrate.
Claim 12
Dependent Claim
32 words
The article according to claim 3, characterized in that the adhesive layer is provided with covers selected from a member of the group of cardboard, Kraft paper, injectable or hardenable plastics materials.
Claim 13
Dependent Claim
13 words
The article of claims 1 or 2 where said NCO index is ≦70.
Claim 14
Dependent Claim
69 words
The article of claim 3 where said foam is obtained by reacting a polyisocyanate or polyisocyanate prepolymer with an excess of polyols or mixtures thereof whilst maintaining an NCO index of ≦80 for the purpose of obtaining an adhesive surface and further characterized by a density of 80 to 250 kg/m 3 , a modulus of elasticity of <300,000 N/m 2 and a loss factor of at least 0.4.
Claim 15
Dependent Claim
13 words
The article of claims 3 or 12 where said NCO index is ≦70.
Claim 16
Dependent Claim
14 words
The article of claims 3, 12 or 13 where said substrate is sheet metal.
Claim 17
Dependent Claim
15 words
The article of claims 3, 12 and 13 where said substrate is a vehicle section.
Claim 18
Dependent Claim
14 words
The article of claim 15 where said vehicle section is fabricated from sheet metal.
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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |