US4094869A
Expired / Lapsed
US
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Thermally stable, rigid, cellular isocyanurate polyurethane foams
Assignee: Building Materials Corp of America
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Filing: 1975-06-16
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Granted: 1978-06-13
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Expires: 1995-06-16
Abstract
Abstract Rigid isocyanurate urethane polymers useful for insulation purposes and characterized by unexpected and significantly superior thermal stability are achieved by incorporation therein of 2,3-dibromo-2-butene-1,4-diol, antimony oxide and hydrated alumina.
Inventors
- 👤 Jerome B. Biranowski
- 👤 Donald H. Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:57
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G18/28; C08G18/67; C08G18/675; C08G18/677; C08G18/6775; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08J2379/00; C08J2379/04; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
147 words
A process for preparing a thermally stable, rigid cellular isocyanurate polyurethane foam that comprises reacting the polyols including an unhalogenated polyol and 2,3-dibromo-2-butenediol-1,4; wherein said 2,3-dibromo-2-butenediol-1,4 is incorporated in said reaction mixture in a proportion by weight of about 30 percent to about 60 percent of the total polyol incorporated in said reaction mixture; a polymethylene polyphenyl polyisocyanate in proportions such that the active hydrogen groups present in the total of the polyols are less than fifty percent of the number of isocyanato groups present in the polymethylene polyphenyl polyisocyanate of said reaction mixture; antimony oxide and hydrated alumina; each of said antimony oxide and said hydrated alumina being present in a proportion by weight of said polyisocyanate of about 1 percent to 20 percent and 10 percent to 100 percent respectively; together with a blowing agent and trimerization catalyst; and subjecting said reaction mixture to postcuring.
Claim 2
Dependent Claim
147 words
A process for preparing a thermally stable, rigid cellular isocyanurate polyurethane foam that comprises reacting the polyols including an unhalogenated polyol and 2,3-dibromo-2-butenediol-1,4; wherein said 2,3-dibromo-2-butenediol-1,4 is incorporated in said reaction mixture in a proportion by weight of about 30 percent to about 60 percent of the total polyol incorporated in said reaction mixture; a polymethylene polyphenyl polyisocyanate in proportions such that the active hydrogen groups present in the total of the polyols are less than fifty percent of the number of isocyanato groups present in the polymethylene polyphenyl polyisocyanate of said reaction mixture; antimony oxide and hydrated alumina; each of said antimony oxide and said hydrated alumina being present in a proportion by weight of said polyisocyanate of about 1 percent to 20 percent and 10 percent to 100 percent respectively; together with a blowing agent and trimerization catalyst; and subjecting said reaction mixture to postcuring.
Claim 3
Dependent Claim
46 words
The process of claim 1, wherein said hydrated alumina is alumina trihydrate having a particle size of about 0.5 micron to 5 microns and characterized by a water of crystallinity which upon thermal dehydration results in absorption of at least 300 calories per gram of hydrate.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said alumina trihydrate is alpha alumina trihydrate.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the antimony oxide present has a particle size of about 0.25 micron to 5 microns.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said unhalogenated polyol has a hydroxyl number of from about 200 to about 1000.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein said polyol is a poly(oxypropylene) derivative of sucrose.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein said unhalogenated polyol is a polyester polyol or a polyether polyol
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said trimerization catalyst is 2,4,6-tris (dimethylaminomethyl)phenol.
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein said blowing agent is one that is vaporized by the exothermic reaction of the isocyanate and hydroxyl moieties of the reactant isocyanate and polyol.
Claim 11
Dependent Claim
13 words
The process of claim 9 wherein said blowing agent is a halogenated hydrocarbon.
Claim 12
Dependent Claim
20 words
The process of claim 10 wherein there is included in sad reaction mixture a low molecular weight basic nitrogen-containing polyol.
Claim 13
Dependent Claim
143 words
A thermally stable, rigid, cellular isocyanurate polyurethane foam comprising the reaction products of polyols including an unhalogenated polyol and 2,3-dibromo-2-butenediol-1,4; wherein said 2,3-dibromo-2-butenediol-1,4-is incorporated in said reaction mixture in a portion by weight of about 30 percent to about 60 percent of the total polyol incorporated in said reaction mixture; a polymethylene polyphenyl polyisocyanate in proportions such that the active hydrogen groups present in the total of the polyols are less than fifty percent of the number of isocyanato groups present in the polymethylene polyphenyl polyisocyanate of said reaction mixture; antimony oxide and hydrated alumina; each of said antimony oxide and said hydrated alumina being present in a proportion by weight of said polyisocyanate of about 1 percent to 20 percent and 10 percent to 100 percent respectively; together with a blowing agent and trimerization catalyst; and subjecting said reaction mixture to postcuring.
Claim 14
Dependent Claim
143 words
A thermally stable, rigid, cellular isocyanurate polyurethane foam comprising the reaction products of polyols including an unhalogenated polyol and 2,3-dibromo-2-butenediol-1,4; wherein said 2,3-dibromo-2-butenediol-1,4-is incorporated in said reaction mixture in a portion by weight of about 30 percent to about 60 percent of the total polyol incorporated in said reaction mixture; a polymethylene polyphenyl polyisocyanate in proportions such that the active hydrogen groups present in the total of the polyols are less than fifty percent of the number of isocyanato groups present in the polymethylene polyphenyl polyisocyanate of said reaction mixture; antimony oxide and hydrated alumina; each of said antimony oxide and said hydrated alumina being present in a proportion by weight of said polyisocyanate of about 1 percent to 20 percent and 10 percent to 100 percent respectively; together with a blowing agent and trimerization catalyst; and subjecting said reaction mixture to postcuring.
Claim 15
Dependent Claim
18 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein said hydrated alumina is alumina trihydrate.
Claim 16
Dependent Claim
26 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein said unhalongenated polyol has a hydroxyl number of from about 200 to about 1000.
Claim 17
Dependent Claim
21 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 14 wherein said polyol is a poly (oxypropylene) derivative of sucrose.
Claim 18
Dependent Claim
18 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein said trimerization catalyst is 2,4,6-tris (dimethylaminomethyl)phenol.
Claim 19
Dependent Claim
36 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein said blowing agent is one that is vaporized by the exothermic reaction of the isocyanate and hydroxyl moieties of the reactant isocyanate and polyol.
Claim 20
Dependent Claim
19 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 17 wherein said blowing agent is a halogenated hydrocarbon.
Claim 21
Dependent Claim
22 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein there is included a low molecular weight basic nitrogen-containing polyol.
Claim 22
Dependent Claim
41 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 12 wherein said hydrated alumina has a water of crystallinity which in the course of thermal dehydration thereof results in the absorption of at least 300 calories per gram of hydrate.
Claim 23
Dependent Claim
40 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 20 wherein said hdyrated alumina contains a refractory metal oxide in excess of about 60 percent by weight; and wherein sid metal has an atomic number of less than 16.
Claim 24
Dependent Claim
19 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 13 wherein said alumina trihydrated is alpha alumina trihydrate.
Claim 25
Dependent Claim
31 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 13 wherein said alumina trihydrate has a density within the range of 2000 grams per liter to 3000 grams per liter.
Claim 26
Dependent Claim
27 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 13, wherein said hydrated alumina has a particle size of about 0.5 micron to about 5 microns.
Claim 27
Dependent Claim
26 words
A rigid, cellular isocyanurate polyurethane foam as claimed in claim 13, wherein said antimony oxide has a particle size of about 0.25 micron to 5 microns.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |