Patent US3882052A successfully refreshed from Google Patents.
US3882052A
Expired / Lapsed
US
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On-site generation of non-froth polyurethane foam
Assignee: BASF Corp
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Filing: 1973-12-17
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Granted: 1975-05-06
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Expires: 1993-12-17
Abstract
Abstract Non-froth polyurethane foam is generated from a portable foaming apparatus using a foam forming formulation which includes a select inert gas as a nucleating agent.
Inventors
- 👤 Robert J Raynor
- 👤 Wade T Petroskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/147; C08K; C08K3/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13; Y10S521/00; Y10S521/908; Y10S521/917
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
IN A PROCESS FOR PRODUCING, BY MEANS OF A PORTABLE FOAMING APPARATUS HAVING A STATIC MIXER, A POLYURETHANE FOAM FROM A REACTION MIXTURE COMPRISED OF A POLYOL, AN ORGANIC ISOCYANATE, A FOAMING AGENT AND A REACTION CATALYST, THE IMPROVEMENT OF PRODUCING NON-FROTH FOAM BY BLENDING INTO SAID MIXTURE A SUFFICIENT PROPORTION OF AN INERT GAS TO BRING ABOUT NUCLEATION OF SAID MIXTURE, SAID INERT GAS HAVING AN ATMOSPHERIC BOILING POINT BELOW ABOUT -80*C.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR PRODUCING, BY MEANS OF A PORTABLE FOAMING APPARATUS HAVING A STATIC MIXER, A POLYURETHANE FOAM FROM A REACTION MIXTURE COMPRISED OF A POLYOL, AN ORGANIC ISOCYANATE, A FOAMING AGENT AND A REACTION CATALYST, THE IMPROVEMENT OF PRODUCING NON-FROTH FOAM BY BLENDING INTO SAID MIXTURE A SUFFICIENT PROPORTION OF AN INERT GAS TO BRING ABOUT NUCLEATION OF SAID MIXTURE, SAID INERT GAS HAVING AN ATMOSPHERIC BOILING POINT BELOW ABOUT -80*C.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said gas is selected from the group consisting of nitrogen, helium, and air.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said foam is a rigid foam.
Claim 5
Dependent Claim
10 words
The process of claim 3 wherein said gas is nitrogen.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein said polyol is a polyether polyol having 2 to 8 active hydrogens.
Claim 7
Dependent Claim
46 words
The process of claim 5 wherein said foam is a rigid foam, and said polyether polyol is an oxyalkylated polyol or a mixture of oxyalkylated polyols having an average of 4 to 8 active hydrogens and a hydroxyl number ranging from about 300 to about 700.
Claim 8
Dependent Claim
26 words
The process of claim 6 wherein said organic isocyanate is selected from the group consisting of toluene diisocyanate, methylene-bis(phenylisocyanate), polyphenylene polymethylene isocyanate, and a mixture thereof.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein said boiling point is below about -130*C.
Claim 10
Dependent Claim
32 words
The process of claim 8 wherein said oxyalkylated polyol or mixture thereof comprises the product of oxyalkylating a polyhydroxy initiator selected from the group consisting of pentaerythritol, sucrose, dextrose, and methyl glucoside.
Claim 11
Dependent Claim
19 words
The process of claim 9 wherein said gas is selected from the group consisting of nitrogen, helium, and air.
Claim 12
Dependent Claim
17 words
The process of claim 10 wherein said mixture has a viscosity, at 25*C, below about 800 cps.
Claim 13
Dependent Claim
10 words
The process of claim 11 wherein said gas is nitrogen.
Claim 14
Dependent Claim
11 words
The process of claim 12 wherein said foaming agent is trichlorofluoromethane.
Claim 15
Dependent Claim
12 words
The process of claim 13 wherein said mixture also comprises a surfactant.
Claim 16
Dependent Claim
13 words
The process of claim 14 wherein said organic isocyanate is polyphenylene polymethylene isocyanate.
Claim 17
Dependent Claim
12 words
The process of claim 15 wherein said catalyst comprises a tertiary amine.
Claim 18
Dependent Claim
12 words
The process of claim 15 wherein said tertiary amine is triethylene diamine.
Claim 19
Dependent Claim
16 words
The process of claim 17 wherein said oxyalkylated polyol or mixture thereof comprises oxypropylated methyl glucoside.
References Cited (Backward Citations)
US3541023A
Cited
US3769232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |