Patent US4323658A successfully refreshed from Google Patents.
US4323658A
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US
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Polyisocyanurates from diols modified with epoxy resins
Assignee: Dow Chemical Co
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Filing: 1980-09-02
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Granted: 1982-04-06
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Expires: 2000-09-02
Abstract
Abstract A method of preparing polyether polyols in the 200-1000 molecular weight range by modifying a polyol initiator with an epoxy resin and one or more alkylene oxides is described. The modified polyols may be used in preparing rigid isocyanurate foams with improved compressability and flammability properties.
Inventors
- 👤 George P. Speranza
- 👤 Robert L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:33
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/145; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4895; C08G65/00; C08G65/02; C08G65/26; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/914
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
66 words
A modified polyether polyol being produced by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 2
Dependent Claim
66 words
A modified polyether polyol being produced by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 3
Dependent Claim
27 words
The modified polyether polyol as described in claim 1 in which the resulting modified polyol has a molecular weight in the range of about 200 to 1,000.
Claim 4
Dependent Claim
37 words
The modified polyether polyol as described in claim 1 in which the epoxy resin is selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins, and aliphatic epoxy resins.
Claim 5
Dependent Claim
28 words
The modified polyether polyol as described in claim 1 in which the alkylene oxides are taken from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
Claim 6
Dependent Claim
34 words
The modified polyether polyol as described in claim 1 in which the components are reacted in the pressure range between about 20 psi and about 60 psi during the preparation of the modified polyol.
Claim 7
Dependent Claim
27 words
The modified polyether polyol as described in claim 1 in which the resulting modified polyol has an OH number in the range of about 200 to 600.
Claim 8
Dependent Claim
99 words
A modified polyether polyol having a molecular weight in the range of about 200 to 1,000 and being produced by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of two with an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins and aliphatic epoxy resins, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 9
Dependent Claim
99 words
A modified polyether polyol having a molecular weight in the range of about 200 to 1,000 and being produced by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of two with an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins and aliphatic epoxy resins, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 10
Independent Claim
65 words
A method of preparing a modified polyether polyol comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 11
Independent Claim
65 words
A method of preparing a modified polyether polyol comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 12
Dependent Claim
31 words
A method of preparing a modified polyether polyol as described in claim 8 in which the resulting modified polyol has a molecular weight in the range of about 200 to 1,000.
Claim 13
Dependent Claim
41 words
A method of preparing a modified polyether polyol as described in claim 8 in which the epoxy resin is selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins, and aliphatic epoxy resins.
Claim 14
Dependent Claim
32 words
A method of preparing a modified polyether polyol as described in claim 8 in which the alkylene oxides are taken from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
Claim 15
Dependent Claim
38 words
A method of preparing a modified polyether polyol as described in claim 8 in which the components are reacted in the pressure range between about 20 psi and about 60 psi during the preparation of the modified polyol.
Claim 16
Dependent Claim
31 words
A method of preparing a modified polyether polyol as described in claim 8 in which the resulting modified polyol has an OH number in the range of about 200 to 600.
Claim 17
Independent Claim
85 words
A method of preparing a modified polyether polyol comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of two with an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins, and aliphatic epoxy resins, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 18
Independent Claim
85 words
A method of preparing a modified polyether polyol comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of two with an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins, and aliphatic epoxy resins, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 19
Dependent Claim
88 words
An improved rigid polyisocyanurate foam produced by the reaction of a modified polyol, an organic polyisocyanate and a foam catalyst wherein the improvement comprises making the modified polyol by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 20
Dependent Claim
88 words
An improved rigid polyisocyanurate foam produced by the reaction of a modified polyol, an organic polyisocyanate and a foam catalyst wherein the improvement comprises making the modified polyol by a method comprising the following steps (a) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (b) heating the mixture in (a) to a temperature between about 70° C. to 115° C. for a period of time and (c) adding to the heated mixture one or more alkylene oxides.
Claim 21
Independent Claim
93 words
A method for producing an improved rigid polyisocyanurate foam which comprises (a) making a modified polyol by a method comprising the following steps (1) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (2) heating the mixture in (1) to a temperature between about 70° C. to 115° C. for a period of time and (3) adding to the heated mixture one or more alkylene oxides, and (b) reacting said modified polyol with an organic polyisocyanate and one or more suitable foam catalysts.
Claim 22
Independent Claim
93 words
A method for producing an improved rigid polyisocyanurate foam which comprises (a) making a modified polyol by a method comprising the following steps (1) mixing a low molecular weight polyol initiator having a hydroxyl functionality of less than three with an epoxy resin, (2) heating the mixture in (1) to a temperature between about 70° C. to 115° C. for a period of time and (3) adding to the heated mixture one or more alkylene oxides, and (b) reacting said modified polyol with an organic polyisocyanate and one or more suitable foam catalysts.
Claim 23
Dependent Claim
69 words
The modified polyol of claim 1 in which heating step (b) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
Claim 24
Dependent Claim
68 words
The modified polyol of claim 7 in which heat-step (b) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
Claim 25
Dependent Claim
68 words
The method of claim 8 in which heating step (b) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
Claim 26
Dependent Claim
68 words
The method of claim 14 in which heating step (b) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
Claim 27
Dependent Claim
69 words
The improved foam of claim 15 in which heating step (b) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
Claim 28
Dependent Claim
68 words
The method of claim 16 in which heating step (2) occurs for at least fifteen minutes and in which the reaction mass containing initiator, epoxy resin and alkylene oxide is continued to be heated in the range between about 70° C. and 115° C. after the alkylene oxide is added for about one hour or more before the modified polyol is stripped out in a final separation step.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |