Patent US5145883A successfully refreshed from Google Patents.
US5145883A
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US
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Methods for producing polyether ester polyols and polyurethanes
Assignee: AGC Inc
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Filing: 1991-01-03
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Granted: 1992-09-08
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Expires: 2011-01-03
Abstract
Abstract The present invention relates a method for producing a polyether ester polyol containing polycarboxylic acid residues in the vicinity of the terminals, by means of a doubles metal cyanide complex catalyst. Namely, the present invention is a method for producing a polyether ester polyol by reacting a polyether polyol having a hydroxyl value of at most 400, a polycarboxylic anhydride and a monoepoxide by means of a double metal cyanide complex as a catalyst. The present invention relates also to a process for producing a flexible polyurethane foam or a polyurethane elastomer using this polyether ester polyol. The flexible polyurethane foam produced has a high thermal fusing properties, and by laminating it with e.g. cloth, it is possible to obtain a laminate having high bond strength. Further, this polyurethane elastomer has superior physical properties as compared with an elastomer obtainable by using a polyether polyol or a polyester polyol.
Inventors
- 👤 Joichi Saito
- 👤 Sigeyuki Kozawa
- 👤 Nobuaki Kunii
- 👤 Hirotsugu Yamamoto
- 👤 Hiromitsu Takeyasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4291; C08G18/4244; C08G18/4247; C08G18/4252; C08G18/48; C08G18/4887; C08G63/00; C08G63/66; C08G63/668; C08G2110/00; C08G2110/0008; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
A method for producing a polyether ester polyol, characterized by reacting a polyether polyol having a hydroxyl value of at most 400, a polycarboxylic anhydride and a monoepoxide by means of a double metal cyanide complex as a catalyst.
Claim 2
Independent Claim
39 words
A method for producing a polyether ester polyol, characterized by reacting a polyether polyol having a hydroxyl value of at most 400, a polycarboxylic anhydride and a monoepoxide by means of a double metal cyanide complex as a catalyst.
Claim 3
Dependent Claim
35 words
The method according to claim 1, wherein at least one mol, per mol of the polyether polyol, of the polycarboxylic anhydride and at least equimol, relative to the polycarboxylic anhydride, of the monoepoxide, are reacted.
Claim 4
Dependent Claim
90 words
The method according to claim 1, wherein the polyether polyol is a polyether polyol having a hydroxyl value of at most 200 obtained by ring-opening polymerization of at least one type of alkylene oxide having from 2 to 4 carbon atoms to a polyhydroxy compound having a hydroxyl value of from 2 to 8, the polycarboxylic anhydride is an anhydride of a dicarboxylic acid which does not substantially have an α,β-unsaturated group, and the monoepoxide is at least one type of alkylene oxide having from 2 to 4 carbon atoms.
Claim 5
Dependent Claim
20 words
The method according to claim 1, wherein the hydroxyl value of the polyether ester polyol is from 5 to 80.
Claim 6
Dependent Claim
33 words
The method according to claim 1, wherein the hydroxyl value of the polyether ester polyol is from 5 to 80 and from 1/5 to 4/5 of the hydroxyl value of the polyether polyol.
Claim 7
Dependent Claim
37 words
The method according to claim 1, wherein the polycarboxylic anhydride is at least one polycarboxylic anhydride selected from the group consisting of phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, methylendo methylene tetrahydrophthalic anhydride, succinic anhydride and glutaric anhydride.
Claim 8
Dependent Claim
51 words
A process for producing a flexible polyurethane foam, characterized by producing a flexible polyurethane foam by reacting polyols containing the polyether ester polyol produced by the method as defined in claim 1 and a polyisocyanate compound in the presence of a blowing agent and an assisting agent such as a catalyst.
Claim 9
Dependent Claim
23 words
A laminate obtained by thermally fusing the flexible polyurethane foam produced by the process as defined in claim 7 and a fibrous substrate.
Claim 10
Dependent Claim
46 words
A process for producing a polyurethane, characterized by producing a polyurethane by reacting polyols containing the polyether ester polyol produced by the method as defined in claim 1, a chain extender and a polyisocyanate compound in the presence of an assisting agent such as a catalyst.
Claim 11
Dependent Claim
32 words
The process according to claim 9, wherein the chain extender is a compound having a molecular weight of at most 400 and having 2 or 3 functional groups reactive with isocyanate groups.
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) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |