US4444915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid polyisocyanurate foam
Assignee: Building Materials Corp of America
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Filing: 1983-08-01
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Granted: 1984-04-24
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Expires: 2003-08-01
Abstract
Abstract Polyisocyanurate foam in which the polyol content is largely a polyol mixture prepared by the transesterification with a glycol of a residue obtained from the manufacture of dimethyl terephthalate and in which the foam has been prepared using fluorocarbon blowing agent and alkoxylated alkyl amine to improve compatibility between the polyol and the blowing agent.
Inventors
- 👤 Louis L. Grube
- 👤 Charles J. Horner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4225; C08G18/4009; C08G18/4018; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/6648; C08G18/6655; C08G2115/00; C08G2115/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
175 words
Rigid cellular polyisocyanurate foam comprising the post cured reaction product of reacting aromatic polyisocyanate with between about 0.1 and about 0.5 hydroxyl equivalent of polyol per equivalent of said polyisocyanate, said polyol comprising at least about 60 percent polyol mixture prepared by the transesterification with a glycol of molecular weight from about 60 to about 400 of a residue remaining after dimethyl terephthalate and methyl p-toluate have been removed from a dimethyl terephthalate esterified oxidate reaction product, the major portion of said residue comprising a mixture of methyl and benzyl esters of benzene and biphenyl di- and tricarboxylic acids, said reaction of polyisocyanate and polyol taking place in the presence of: (a) isocyanate trimerization catalyst; (b) fluorocarbon blowing agent; and (c) between about 0.1 and about 15 wt% based on total polyol of alkoxylated alkyl amine of the formula ##STR7## wherein R 1 is an alkyl group containing from 8 to about 30 carbon atoms, each R 2 is independently H or CH 3 , and x+y is an integer from 2 to about 50.
Claim 2
Dependent Claim
175 words
Rigid cellular polyisocyanurate foam comprising the post cured reaction product of reacting aromatic polyisocyanate with between about 0.1 and about 0.5 hydroxyl equivalent of polyol per equivalent of said polyisocyanate, said polyol comprising at least about 60 percent polyol mixture prepared by the transesterification with a glycol of molecular weight from about 60 to about 400 of a residue remaining after dimethyl terephthalate and methyl p-toluate have been removed from a dimethyl terephthalate esterified oxidate reaction product, the major portion of said residue comprising a mixture of methyl and benzyl esters of benzene and biphenyl di- and tricarboxylic acids, said reaction of polyisocyanate and polyol taking place in the presence of: (a) isocyanate trimerization catalyst; (b) fluorocarbon blowing agent; and (c) between about 0.1 and about 15 wt% based on total polyol of alkoxylated alkyl amine of the formula ##STR7## wherein R 1 is an alkyl group containing from 8 to about 30 carbon atoms, each R 2 is independently H or CH 3 , and x+y is an integer from 2 to about 50.
Claim 3
Dependent Claim
39 words
Rigid foam according to claim 1 wherein, in the formula for the alkoxylated amine, R 1 represents an alkyl group containing between about 12 and about 20 carbon atoms and x+y equals an integer between 2 and about 10.
Claim 4
Dependent Claim
30 words
Rigid foam according to claim 1 wherein total polyol is present in amounts sufficient to supply between about 0.15 and about 0.25 hydroxyl equivalent of polyol per equivalent of polyisocyanate.
Claim 5
Dependent Claim
24 words
Rigid foam according to claim 1 wherein said polyol prepared by transesterification of residue comprises at least about 75 percent of the total polyol.
Claim 6
Dependent Claim
30 words
Rigid foam according to claim 1 wherein the aromatic polyisocyanate comprises polymethylene polyphenyl polyisocyanate characterized by the general formula: ##STR8## wherein n is predominantly an integer of 1 or 0.
Claim 7
Dependent Claim
12 words
Rigid foam according to claim 1 wherein the blowing agent is trichlorofluoromethane.
Claim 8
Dependent Claim
26 words
Rigid foam according to claim 1 wherein the alkoxylated amine is present in an amount between about 1 and about 6 wt% based on total polyol.
Claim 9
Dependent Claim
25 words
Rigid foam according to claim 1 wherein said blowing agent is present in an amount between about 5 and about 50 wt% based on polyisocyanate.
Claim 10
Dependent Claim
26 words
Rigid foam according to claim 1 wherein said polyol prepared by transesterification of residue comprises at least about 95 percent of the polyol in said mixture.
Claim 11
Dependent Claim
25 words
Rigid foam according to claim 1 wherein said blowing agent is present in an amount between about 10 and about 35 wt% based on polyisocyanate.
Claim 12
Dependent Claim
148 words
Rigid foam according to claim 1 wherein: (a) in the formula for the alkoxylated amine, R 1 represents an alkyl group containing between about 12 and about 20 carbon atoms and x+y equals an integer between 2 and about 10; (b) polyol is used in amounts sufficient to supply between about 0.15 and about 0.25 hydroxyl equivalent of polyol per equivalent of polyisocyanate; (c) said polyol prepared by transesterification of residue comprises at least about 95 percent of the total polyol; (d) the aromatic polyisocyanate comprises polymethylene polyphenyl polyisocyanate characterized by the general formula: ##STR9## wherein n is predominantly an integer of 1 or 0; (e) the alkoxylated amine is present in an amount between about 1 and about 6 wt% based on total polyol; and (f) the blowing agent is trichlorofluoromethane and is present in an amount between about 10 and about 35 wt% based on polyisocyanate.
Claim 13
Dependent Claim
131 words
Reaction mixture comprising: (a) fluorocarbon blowing agent; (b) polyol comprising at least about 60 percent polyol mixture prepared by the transesterification with a glycol of molecular weight from about 60 to about 400 of residue remaining after dimethyl terephthalate and methyl p-toluate have been removed foam dimethyl terephthalate esterified oxidate reaction product, the major portion of said residue comprising a mixture of methyl and benzyl esters of benzene and biphenyl di- and tricarboxylic acids; and (c) between about 0.1 and about 15 pounds per hundred pounds total polyol of alkoxylated alkyl amine of the formula ##STR10## wherein R 1 is an alkyl group containing from 8 to about 30 carbon atoms, each R 2 is independently H or CH 3 , and x+y is an integer from 2 to about 50.
Claim 14
Dependent Claim
131 words
Reaction mixture comprising: (a) fluorocarbon blowing agent; (b) polyol comprising at least about 60 percent polyol mixture prepared by the transesterification with a glycol of molecular weight from about 60 to about 400 of residue remaining after dimethyl terephthalate and methyl p-toluate have been removed foam dimethyl terephthalate esterified oxidate reaction product, the major portion of said residue comprising a mixture of methyl and benzyl esters of benzene and biphenyl di- and tricarboxylic acids; and (c) between about 0.1 and about 15 pounds per hundred pounds total polyol of alkoxylated alkyl amine of the formula ##STR10## wherein R 1 is an alkyl group containing from 8 to about 30 carbon atoms, each R 2 is independently H or CH 3 , and x+y is an integer from 2 to about 50.
Claim 15
Dependent Claim
39 words
Reaction mixture according to claim 12 wherein, in the formula for the alkoxylated amine, R 1 represents an alkyl group containing between about 12 and about 20 carbon atoms and x+y equals an integer between 2 and about 10.
Claim 16
Dependent Claim
26 words
Reaction mixture according to claim 12 wherein said polyol prepared by transesterification of residue comprises at least about 75 percent of the polyol in said mixture.
Claim 17
Dependent Claim
30 words
Reaction mixture according to claim 12 wherein the aromatic polyisocyanate comprises polymethylene polyphenyl polyisocyanate characterized by the general formula: ##STR11## wherein n is predominantly an integer of 1 or 0.
Claim 18
Dependent Claim
12 words
Reaction mixture according to claim 12 wherein the blowing agent is trichlorofluoromethane.
Claim 19
Dependent Claim
31 words
Reaction mixture according to claim 12 wherein the alkoxylated amine is present in an amount between about 1 and about 6 pounds of alkoxylated amine per hundred pounds of total polyol.
Claim 20
Dependent Claim
26 words
Reaction mixture according to claim 12 wherein said polyol prepared by transesterification of residue comprises at least about 95 percent of the polyol in said mixture.
Claim 21
Dependent Claim
28 words
Reaction mixture according to claim 12 wherein the blowing agent is trichlorofluoromethane and is present in an amount between about 15 and about 175 wt% based on polyol.
Claim 22
Dependent Claim
104 words
Reaction mixture according to claim 12 wherein: (a) in the formula for the alkoxylated amine, R 1 represents an alkyl group containing between about 12 and about 20 carbon atoms and x+y equals an integer between 2 and about 10; (b) said polyol prepared by transesterification of residue comprises at least about 95 percent of the polyol in said mixture; (c) the alkoxylated amine is present in an amount between about 1 and about 6 wt% based on total polyol; and (d) the blowing agent is trichlorofluoromethane and is present in an amount between about 15 and about 175 wt% based on total polyol.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |