US4727094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing polyurethanes
Assignee: Lyondell Chemical Technology LP
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Filing: 1986-12-03
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Granted: 1988-02-23
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Expires: 2006-12-03
Abstract
Abstract Novel polyols, useful in, for example, reaction injection molding, high resiliency foams and the preparation of polymer/polyols, characterized by the following formula: ##STR1## wherein A and A', which may be the same or different, are connective atoms--carbon, oxygen or combinations thereof with hydrogen atoms or the like satisfying the valences; B is nitrogen (N) or CR, R being hydrogen, alkyl, aryl or the like; Q is 0, CH 2 O, C 2 H 4 O, C 3 H 6 O, or C 4 H 8 O; D is an oxyalkylene or ##STR2## X and X', which may be the same or different, are OH, NH 2 or H; Z is OH; n and d are integers of 0 to 10 and the sum of n and d does not exceed 10; s is 0 or 1, and m is an integer of at least about 16, with the proviso that when B is N and either n or d is zero, X and X' are other than H, provide processing advantages and are highly compatible with low molecular weight extenders such as ethylene glycol.
Inventors
- 👤 Kenneth L. Hoy
- 👤 Glenn A. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:55
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G65/26; C08G2120/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
227 words
A method for producing a polyurethane by reacting a mixture comprising (a) a polyol having the following formula: ##STR12## wherein A and A' are individually connective atoms which may be the same or different and are selected from the group consisting of carbon and oxygen or combinations thereof; R is selected from the group consisting of hydrogen, alkyl and aryl; Q is a member selected from the group consisting of O, CH 2 O, C 2 H 4 O, C 3 H 6 O and C 4 H 8 O; D is a member selected from the group consisting of --OC a H 2a -- and ##STR13## where a has a value of one to four; X and X', may be the same or different, and are individually members selected from the group consisting of OH, NHR and H, X and X' being selected such that the combination of X and X' and their respective adjacent atomic units A and A' provide a functional group reactive with an isocyanate radical; n and d are individually integers of 0 and 10 and the sum of n and d is at least one and does not exceed 10; s is either 0 or 1, and m is an integer of at least about 16, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b).
Claim 2
Independent Claim
227 words
A method for producing a polyurethane by reacting a mixture comprising (a) a polyol having the following formula: ##STR12## wherein A and A' are individually connective atoms which may be the same or different and are selected from the group consisting of carbon and oxygen or combinations thereof; R is selected from the group consisting of hydrogen, alkyl and aryl; Q is a member selected from the group consisting of O, CH 2 O, C 2 H 4 O, C 3 H 6 O and C 4 H 8 O; D is a member selected from the group consisting of --OC a H 2a -- and ##STR13## where a has a value of one to four; X and X', may be the same or different, and are individually members selected from the group consisting of OH, NHR and H, X and X' being selected such that the combination of X and X' and their respective adjacent atomic units A and A' provide a functional group reactive with an isocyanate radical; n and d are individually integers of 0 and 10 and the sum of n and d is at least one and does not exceed 10; s is either 0 or 1, and m is an integer of at least about 16, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b).
Claim 3
Dependent Claim
18 words
A method as claimed in claim 1 wherein a low molecular weight extender is included in said mixture.
Claim 4
Dependent Claim
16 words
A method as claimed in claim 2 wherein said low molecular weight extender is ethylene glycol.
Claim 5
Dependent Claim
35 words
A method as claimed in claim 3 wherein said ethylene glycol is present in an amount of from about 10 to about 25 percent, based upon the weight of said polyol and said ethylene glycol.
Claim 6
Dependent Claim
13 words
A method as claimed in claim 1 wherein X and X' are OH.
Claim 7
Dependent Claim
11 words
A method as claimed in claim 5 wherein D is oxyalkylene.
Claim 8
Dependent Claim
12 words
A method as claimed in claim 6 wherein said oxyalkylene is oxypropylene.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 7 wherein the sum of n and d is 2.
Claim 10
Dependent Claim
15 words
A method as claimed in claim 7 wherein said oxypropylene is capped with ethylene oxide.
Claim 11
Dependent Claim
21 words
A method as claimed in claim 7 wherein said polyol has a hydroxyl number of from about 30 to about 75.
Claim 12
Dependent Claim
18 words
A method as claimed in claim 1 wherein said mixture includes a blowing agent and a foam stabilizer.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 11 wherein said blowing agent is water and a foam is prepared by a free rise technique.
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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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |