US4302550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the mixing and application of reactive materials
Assignee: Bayer AG
•
Filing: 1980-04-29
•
Granted: 1981-11-24
•
Expires: 2000-04-29
Abstract
Abstract The invention disclosed herein is concerned with a process for mixing a plurality of viscous rapidly reacting, fluid materials and an apparatus with which to perform this process. In this process the fluid materials are initially introduced into a mixing chamber and mixed with a gas, preferably in such a way that an angular momentum is imparted to the mixture. The mixture is then fed into a static mixer which has a short residence time spectrum. The apparatus comprises a cylindrical mixing chamber with a gas inlet and at least one nongaseous fluid material inlet arranged to direct flow tangentially to the interior surface of the mixing chamber. Other inlets may be provided downstream of these initial inlets but before a static mixer with which said mixing chamber communicates. An outlet is provided downstream of said static mixer which preferably has intersecting baffle plates, a low pressure loss and a short residence time spectrum.
Inventors
- 👤 Karl H. Pisaric
- 👤 Karl-Arnold Weber
- 👤 Harro Traubel
- 👤 Dieter Brauner
- 👤 Manfred H. Pahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B01; B01F; B01F23/00; B01F23/40; B01F23/47; B01F25/00; B01F25/40; B01F25/42; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7419; B29B7/76; B29B7/7605; C09; C09D; C09D175/00; C09D175/04; Y; Y10; Y10S; Y10S521/00; Y10S521/917; Y10T; Y10T156/00; Y10T156/19
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A method of mixing a plurality of viscous, rapidly reacting non-gaseous fluid materials in two stages comprising (1) introducing the materials and a gas into a preliminary mixing chamber in such a manner that an angular momentum is imparted to this mixture of gas and liquid, said manner including the introduction of the gas tangentially to the mixing chamber; and then (2) feeding said mixture into a short static mixing apparatus which has a narrow residence time spectrum, a small pressure drop, and a short residence time thereby destroying the angular momentum of said mixture, said static mixing apparatus optionally including an interpolated shearing apparatus between the preliminary mixing chamber and the main body of the static mixing apparatus to effect said momentum destruction.
Claim 2
Independent Claim
124 words
A method of mixing a plurality of viscous, rapidly reacting non-gaseous fluid materials in two stages comprising (1) introducing the materials and a gas into a preliminary mixing chamber in such a manner that an angular momentum is imparted to this mixture of gas and liquid, said manner including the introduction of the gas tangentially to the mixing chamber; and then (2) feeding said mixture into a short static mixing apparatus which has a narrow residence time spectrum, a small pressure drop, and a short residence time thereby destroying the angular momentum of said mixture, said static mixing apparatus optionally including an interpolated shearing apparatus between the preliminary mixing chamber and the main body of the static mixing apparatus to effect said momentum destruction.
Claim 3
Dependent Claim
14 words
A method as claimed in claim 1, wherein the materials have greatly differing viscosities.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 1, wherein the materials are at different temperatures.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 1, wherein the gas is an inert gas.
Claim 6
Dependent Claim
12 words
A method as claimed in claim 4, wherein the gas is air.
Claim 7
Dependent Claim
76 words
The method of claim 1 wherein isocyanate prepolymers chain extenders, and gas are introduced tangentially with the points of introduction spaced along the direction of flow of the mixture in the preliminary mixing chamber, the mixture being formed being finely mixed by means of the static mixer with intersecting baffle plates, the mixture thus formed being atomized and applied onto flexible substrates by the direct or reverse method, upon which substrates an elastomeric polyurethane is formed.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 6, wherein the chain extenders are polyamino compounds.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 7 wherein the mixture formed is atomized with air atomization.
Claim 10
Dependent Claim
20 words
The method of claim 1 wherein at least a portion of said gas is retained in the final mixture obtained.
Claim 11
Dependent Claim
27 words
The method of claim 1 wherein one of the materials to be mixed is introduced upstream from the point of introduction of any of the other materials.
Claim 12
Dependent Claim
18 words
The method of claim 10 wherein the material introduced upstream contributes most to the quantitative rate of flow.
References Cited (Backward Citations)
USRE24514E
Cited
US2043108A
Cited
US3245661A
Cited
US2957203A
Cited
US3434805A
Cited
US3475266A
Cited
US3286992A
Cited
DE1694151C3
Cited
US3462083A
Cited
GB1206746A
Cited
GB1313182A
Cited
DE2035485C3
Cited
GB1381556A
Cited
GB1405020A
Cited
US3862907A
Cited
DE2211055A1
Cited
DE2216871C3
Cited
US3883121A
Cited
DE2245082A1
Cited
US3924989A
Cited
DE2349433A1
Cited
US3923202A
Cited
US4068830A
Cited
DE2530018A1
Cited
US3941355A
Cited
US3982668A
Cited
BE834184A
Cited
US3924837A
Cited
DE2522106B2
Cited
GB1538170A
Cited
US4019719A
Cited
US4053283A
Cited
US4050896A
Cited
US4049197A
Cited
US4137048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |