US4481307A
Expired / Lapsed
US
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Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
Assignee: Dow Chemical Co
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Filing: 1983-10-21
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Granted: 1984-11-06
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Expires: 2003-10-21
Abstract
Abstract Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.
Inventors
- 👤 Richard L. Frentzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08F; C08F283/00; C08F283/06; C08J2451/00; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/911
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
159 words
In the method of preparing a cellular foam from: A. polyisocyanurate polymer forming reactants, and B. a blowing agent, the improvement which comprises utilizing as surfactant the reaction product of (a) a polyoxyalkylene adduct having the formula H--polyoxyalkylene chain).sub.t R, wherein R is an organic or inorganic radical and t is the number of polyoxyalkylene chains reacted onto R, and (b) an esterified unsaturated dibasic acid having the formula T.sup.1 O.sub.2 C--C.sub.u H.sub.2u-2 --CO.sub.2 T.sup.2 wherein u is 2 or 3 and T 1 and T 2 are identical or different and represent a straight or branched, saturated or unsaturated hydrocarbon chain, in the presence of an effective amount of a free-radical initiator and wherein the polyoxyalkylene adduct optionally is treated either before or after its reaction with the esterified unsaturated dibasic acid with a capping agent capable of reacting with the hydroxyl groups of said adduct to reduce the hydroxyl number of said adduct to less than 50.
Claim 2
Dependent Claim
159 words
In the method of preparing a cellular foam from: A. polyisocyanurate polymer forming reactants, and B. a blowing agent, the improvement which comprises utilizing as surfactant the reaction product of (a) a polyoxyalkylene adduct having the formula H--polyoxyalkylene chain).sub.t R, wherein R is an organic or inorganic radical and t is the number of polyoxyalkylene chains reacted onto R, and (b) an esterified unsaturated dibasic acid having the formula T.sup.1 O.sub.2 C--C.sub.u H.sub.2u-2 --CO.sub.2 T.sup.2 wherein u is 2 or 3 and T 1 and T 2 are identical or different and represent a straight or branched, saturated or unsaturated hydrocarbon chain, in the presence of an effective amount of a free-radical initiator and wherein the polyoxyalkylene adduct optionally is treated either before or after its reaction with the esterified unsaturated dibasic acid with a capping agent capable of reacting with the hydroxyl groups of said adduct to reduce the hydroxyl number of said adduct to less than 50.
Claim 3
Dependent Claim
51 words
The method of claim 1 wherein the esterified unsaturated dibasic acid has the formula T.sup.1 O.sub.2 C--C.sub.u H.sub.2u-2 --CO.sub.2 T.sup.2 wherein u is 2 or 3 and T 1 and T 2 are identical and represent a straight or branched, saturated or unsaturated hydrocarbon chain of 4 to 18 carbon atoms.
Claim 4
Dependent Claim
27 words
The method of claim 2 wherein T 1 and T 2 represent a straight or branched, saturated or unsaturated hydrocarbon chain of 8 to 18 carbon atoms.
Claim 5
Dependent Claim
27 words
The method of claim 3 wherein the esterified unsaturated dibasic acid is a member selected from the group consisting of dioctyl maleate, ditridecyl maleate and dioleyl maleate.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein t is an integer from 1 to 8 and the molecular weight of the polyoxyalkylene adduct is above about 1000.
Claim 7
Dependent Claim
48 words
The method of claim 1 wherein the polyoxyalkylene adduct is capped by treatment either before or after the free-radical initiated reaction with a capping agent capable of reacting with the hydroxyl groups of said adduct, whereby the hydroxyl number of said adduct is reduced to less than 50.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein an organo transition metal catalyst is additionally present in the free-radical initiated reaction mixture.
Claim 9
Dependent Claim
45 words
The method of claim 1 wherein the esterified unsaturated dibasic acid comprises about 5 to 40 weight percent of the free-radical initiated reaction mixture, and the initiator comprises from about 2 to 30 weight percent, based on the weight of the esterified unsaturated dibasic acid.
Claim 10
Dependent Claim
110 words
The method of claim 1 wherein the polyoxyalkylene adduct is a member selected from the group consisting of (a) an alkoxylated amine having the formula: ##STR13## wherein R 1 is independently an alkoxylated chain having the formula: ##STR14## s is an integer from 2 to 10 inclusive and the ratio p:q is from 10:90 to 90:10, the molecular weight of said alkoxylated amine being from about 1500 to 12,000, (b) a linear block copolymer of ethylene oxide and propylene oxide, the molecular weight of said block copolymer being above about 2000 and the ethylene oxide content being from about 30 to 80 weight percent, and (c) an ethoxylated castor oil.
Claim 11
Dependent Claim
51 words
The method of claim 9 wherein the esterified unsaturated dibasic acid has the formula T.sup.1 O.sub.2 C--C.sub.u H.sub.2u-2 --CO.sub.2 T.sup.2 wherein u is 2 or 3 and T 1 and T 2 are identical and represent a straight or branched, saturated or unsaturated hydrocarbon chain of 8 to 18 carbon atoms.
Claim 12
Dependent Claim
48 words
The method of claim 10 wherein the polyoxyalkylene adduct is capped by treatment either before or after the free-radical initiated reaction with a capping agent capable of reacting with the hydroxyl groups of said adduct, whereby the hydroxyl number of said adduct is reduced to less than 10.
Claim 13
Dependent Claim
12 words
The method of claim 11 wherein the capping agent is acetic anhydride.
Claim 14
Dependent Claim
27 words
The method of claim 12 wherein the esterified unsaturated dibasic acid is a member selected from the group consisting of dioctyl maleate, ditridecyl maleate and dioleyl maleate.
Claim 15
Dependent Claim
37 words
The method of claim 12 wherein (a) the polyoxyalkylene adduct is ethoxylated castor oil, and (b) the esterified unsaturated dibasic acid is a member selected from the group consisting of dioctyl maleate, ditridecyl maleate and dioleyl maleate.
Claim 16
Dependent Claim
35 words
The method of claim 14 wherein (a) the ethoxylated castor oil contains from about 25 to 60 moles of ethylene oxide per mole of oil, and (b) the esterified unsaturated dibasic acid is ditridecyl maleate.
Claim 17
Dependent Claim
59 words
The method of claim 15 wherein the ethoxylated castor oil contains from about 35 to 40 moles of ethylene oxide per mole of oil, the ditridecyl maleate comprises about 5 to 40 weight percent of the free-radical initiated reaction mixture and the initiator comprises from about 2 to 30 weight percent, based on the weight of the ditridecyl maleate.
Claim 18
Dependent Claim
49 words
The method of claim 1 wherein the polyoxyalkylene adduct is treated either before or after its reaction with the esterified unsaturated dibasic acid with a capping agent capable of reacting with the hydroxyl groups of said adduct to reduce the hydroxyl number of said adduct to less than 50.
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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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |