US3674720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for mixing coreactive liquids which form polyurethanes
Assignee: Milacron Inc
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Filing: 1969-11-19
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Granted: 1972-07-04
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Expires: 1989-11-19
Abstract
Abstract A process and apparatus for intimately mixing two or more mutually coreactive liquids such as polyols and polyisocyanates comprising: A. passing the liquids, while in a substantially unmixed state, through a plurality of very small holes such as that provided by a screen, and immediately thereafter B. subjecting the liquids to a high shear. The present process and apparatus find particular utility in the production of high density, foamed polyurethane moldings.
Inventors
- 👤 Donald Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:07
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/405; B29B7/407; B01; B01F; B01F27/00; B01F27/27; B01F27/272; B01F27/2722; B29B7/401; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7414; B01F25/00; B01F2025/91; B01F2025/911; B01F27/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
The process of claim 1 wherein (1) at least one organic polyisocyanate or an isocyanate-terminated reaction product resulting from the reaction of an organic polyisocyanate or mixtures of organic polyisocyanates with an organic polyhydroxy compound or a mixture of organic polyhydroxy compounds and (2) at least one organic polyhydroxy compound are admixed with any or all of the following: blowing agents surfactant catalyst fillers pigments fire retardant additives U.V. stabilizers antioxidants
Claim 2
Dependent Claim
69 words
The process of claim 1 wherein (1) at least one organic polyisocyanate or isocyanate-terminated reaction product resulting from the reaction of an organic polyisocyanate or mixtures of organic polyisocyanates with an organic polyhydroxy compound or mixtures of organic polyhydroxy compounds or (2) at least one organic polyhydroxy compound are admixed with any or all of the following: blowing agents surfactant catalyst fillers pigments fire retardant additives U.V. stabilizers antioxidants
Claim 3
Dependent Claim
11 words
The process of claim 2 whereby a polyurethane foam is produced.
Claim 4
Dependent Claim
11 words
The process of claim 3 whereby a polyurethane foam is produced.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein the plurality of holes are the spaces between the wires of a woven screen having a mesh of 20 to 400 per inch.
Claim 6
Dependent Claim
50 words
The process of claim 1 wherein the mutually co-reactive liquids comprise (1) an organic polyisocyanate or mixture of organic polyisocyanates and (2) a hydroxy-terminated reaction prodiuct obtained by the reaction of an organic polyhydroxy compound or mixture of organic polyhydroxy compounds with an organic polyisocyanate or mixture of organic polyisocyanates.
Claim 7
Dependent Claim
65 words
The process of claim 7 wherein (1) an organic polyisocyanate or mixture of organic polyisocyanates and (2) an hydroxy-terminated reaction product obtained by the reaction of an organic polyhydroxy compound or mixture of organic polyhydroxy compounds with an organic polyisocyanate or mixture of organic polyisocyanates are admixed with any or all of the following: blowing agents surfactant catalyst fillers pigments fire-retardant additives U.V. stabilizers antioxidants
Claim 8
Dependent Claim
65 words
The process of claim 7 wherein (1) an organic polyisocyanate or mixture of organic polyisocyAnates or (2) a hydroxy-terminated reaction product obtained by the reaction of an organic polyhydroxy compound or mixture of organic polyhydroxy compounds with an organic polyisocyanate or mixture of organic polyisocyanates are admixed with any or all of the following: blowing agents surfactant catalyst fillers pigments fire-retardant additives U.V. stabilizers antioxidants
Claim 9
Dependent Claim
11 words
The process of claim 8 whereby a polyurethane foam is produced.
Claim 10
Dependent Claim
11 words
The process of claim 9 whereby a polyurethane foam is produced.
Claim 11
Dependent Claim
29 words
The process of claim 7 wherein the plurality of holes are the spaces between the wires of a woven screen having a mesh of 20 to 400 per inch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |