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US5166182A
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Thermosetting plastic foams and methods of production thereof using novel blowing agents
Assignee: Atlas Roofing Corp
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Filing: 1992-03-23
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Granted: 1992-11-24
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Expires: 2012-03-23
Abstract
Abstract Blowing agents and blowing agent mixtures for preparing a cellular thermosetting plastic foam comprise either (1) a non-chlorinated, partially hydrogenated fluorocarbon with the general formula H x F y C z ; (2) a non-chlorinated, partially hydrogenated fluorocarbon ether with the general formula H x F y C z --O--C m F n H p ; (3) a non-chlorinated, non-hydrogenated, fully fluoronated fluorocarbon; (4) an azeotropic mixture having a boiling point below 50 degrees Celsius; or (5) any mixture of the foregoing. The azeotropic mixtures are produced from organic compounds having surface active properties that enable the blended azeotropic mixture to become miscible with polymer resins. Among the preferred compounds for use in azeotropic mixtures are n-pentane, acetone, methyl alcohol, methyl formate, ethyl formate, ethyl alcohol, 2-methyl butane, nitromethane, cyclopentane, 2,3,-dimethyl butane, 2,2,-dimethyl butane, and dimethyl sulfide. The azeotropic blowing agents and blowing agent systems of the invention can be mixed with partially hydrogenated fluorocarbons and chlorofluorocarbons, and are useful for preparing low density polyurethane, polyisocyanurate, polyurethane modified polyisocyanurate, and phenol-formaldehyde foams.
Inventors
- 👤 Robert H. Blanpied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/144; C08J9/146; C08J9/149; C08J2203/00; C08J2203/14; C08J2203/146
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
30 words
A method of making a cellular thermosetting plastic foam solid using an organic azeotropic mixture as a blowing agent, said azeotropic mixture having a boiling point below 50 degrees Celsius.
Claim 2
Independent Claim
30 words
A method of making a cellular thermosetting plastic foam solid using an organic azeotropic mixture as a blowing agent, said azeotropic mixture having a boiling point below 50 degrees Celsius.
Claim 3
Dependent Claim
48 words
The method of claim 1, wherein said azeotropic mixture of claim 1 is mixed with a non-chlorinated, partially hydrogenated fluorocarbon with the general formula H x F y C z , wherein the subscripts x, y, and z are integers, which mixture is used as a blowing agent.
Claim 4
Dependent Claim
58 words
The method of claim 1, wherein said azeotropic mixture of claim 1 is mixed with a non-chlorinated, partially hydrogenated fluorocarbon ether with the general formula H x F y C z --O--C m F n H p , wherein the subscripts m, n, p, x, y, and z are integers, which mixture is used as a blowing agent.
Claim 5
Dependent Claim
46 words
The method of claim 1, wherein said azeotropic mixture of claim 1 is mixed with a non-chlorinated, non-hydrogenated, fully fluoronated fluorocarbon with the general formula F y C z , wherein the subscripts y, and z are integers, which mixture is used as a blowing agent.
Claim 6
Independent Claim
49 words
A method of making a cellular thermosetting plastic foam solid using a non-chlorinated, partially hydrogenated fluorocarbon ether with the general formula H x F y C z --O--C m F n H p as a blowing agent, wherein the subscripts m, n, p, x, y, and z are integers.
Claim 7
Independent Claim
49 words
A method of making a cellular thermosetting plastic foam solid using a non-chlorinated, partially hydrogenated fluorocarbon ether with the general formula H x F y C z --O--C m F n H p as a blowing agent, wherein the subscripts m, n, p, x, y, and z are integers.
Claim 8
Independent Claim
23 words
The method of claims 1, 2, 3, 4, or 5, wherein CO 2 is also used at least partly as a blowing agent.
Claim 9
Independent Claim
24 words
The method of claims 1, 2, 3, 4, or 5 wherein a partially hydrogenated chlorofluorocarbon is also used at least partly as blowing agent.
Claim 10
Independent Claim
48 words
The method of claims 1, 2, or 3, wherein at least one of the following compounds is mixed with n-pentane (n being an integer) to form said azeotropic mixture: acetone, ethyl ether, methyl formate, ethyl formate, ethyl alcohol, methyl alcohol, methyl sulfide, methyl propyl ether, nitromethane, or water.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein said azeotropic mixture comprises methyl formate mixed with 2,3,-dimethyl butane.
Claim 12
Dependent Claim
15 words
The method of claim 1, wherein said azeotropic mixture comprises methyl alcohol mixed with cyclopentane.
Claim 13
Dependent Claim
14 words
The method of claim 1, wherein said azeotropic mixture comprises n-pentane, nitromethane, and water.
Claim 14
Dependent Claim
15 words
The method of claim 1, wherein said azeotropic mixture comprises n-hexane, methyl alcohol, and acetone.
Claim 15
Dependent Claim
16 words
The method of claim 1, wherein said azeotropic mixture comprises n-hexane, methyl alcohol, and methyl acetate.
Claim 16
Dependent Claim
16 words
The method of claim 1, wherein said azeotropic mixture comprises methyl formate, n-pentane, and methyl alcohol.
Claim 17
Dependent Claim
15 words
The method of claim 1, wherein said azeotropic mixture comprises 2,2-dimethyl butane and dimethyl sulfide.
Claim 18
Dependent Claim
15 words
The method of claim 1, wherein said azeotropic mixture comprises 2,3-dimethyl butane and methyl formate.
Claim 19
Dependent Claim
14 words
The method of claim 1, wherein said azeotropic mixture comprises cyclopentane and methyl acetate.
Claim 20
Dependent Claim
14 words
The method of claim 1, wherein said azeotropic mixture comprises cyclopentane and ethyl alcohol.
Claim 21
Dependent Claim
13 words
The method of claim 1, wherein said azeotropic mixture comprises cyclopentane and acetone.
Claim 22
Dependent Claim
13 words
The method of claim 1, wherein said azeotropic mixture comprises n-hexane and acetone.
Claim 23
Dependent Claim
14 words
The method of claim 1, wherein said azeotropic mixture comprises n-hexane and ethyl formate.
Claim 24
Independent Claim
28 words
The method of claims 1, 4, or 5 wherein said blowing agents are mixed with an active hydrogen compound to form carbon dioxide when reacted with polymeric isocyanate.
Claim 25
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 1.
Claim 26
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 2.
Claim 27
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 3.
Claim 28
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 4.
Claim 29
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 5.
Claim 30
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 5.
Claim 31
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 7.
Claim 32
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 8.
Claim 33
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 9.
Claim 34
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 10.
Claim 35
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 11.
Claim 36
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 12.
Claim 37
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 13.
Claim 38
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 14.
Claim 39
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 15.
Claim 40
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 16.
Claim 41
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 17.
Claim 42
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 18.
Claim 43
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 19.
Claim 44
Dependent Claim
12 words
A thermosetting plastic foam solid produced by the method of claim 20.
References Cited (Backward Citations)
US3993609A
Cited
US4572865A
Cited
US4636529A
Cited
US4710521A
Cited
US4927863A
Cited
US4960804A
Cited
US5032623A
Cited
US4981879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |