US4504648A
Expired / Lapsed
US
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Polyurethaneurea and process for preparing the same
Assignee: Toyo Tire Corp
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Filing: 1983-11-07
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Granted: 1985-03-12
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Expires: 2003-11-07
Abstract
Abstract A polyurethaneurea which comprises a polymer obtained by a polyaddition reaction of (a) a polyetherpolyol derivative and (b) an at least 2-valent polyisocyanate, the polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR1## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05 n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
Inventors
- 👤 Kozo Otani
- 👤 Yoshio Yamada
- 👤 Hiroyuki Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:12
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G18/5024; C08G18/5027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A polyurethaneurea which comprises a polymer obtained by a polyaddition reaction of (a) a polyetherpolyol derivative and (b) an at least 2-valent polyisocyanate, the polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR3## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
Claim 2
Dependent Claim
104 words
A polyurethaneurea which comprises a polymer obtained by a polyaddition reaction of (a) a polyetherpolyol derivative and (b) an at least 2-valent polyisocyanate, the polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR3## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
Claim 3
Dependent Claim
18 words
A polyurethaneurea as defined in claim 1 wherein the para-aminobenzoic acid ester is methyl para-aminobenzoate or ethyl para-aminobenzoate.
Claim 4
Dependent Claim
17 words
A polyurethaneurea as defined in claim 1 wherein the esterification ratio is about 50 to about 95%.
Claim 5
Dependent Claim
129 words
A process for preparing a polyurethaneurea which comprises (A) reacting one mole of an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000 with 0.125n to n moles of para-aminobenzoic acid alkyl ester to obtain a polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR4## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000, and (B) reacting the above polyetherpolyol derivative with at least 2-valent polyisocyanate.
Claim 6
Dependent Claim
129 words
A process for preparing a polyurethaneurea which comprises (A) reacting one mole of an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000 with 0.125n to n moles of para-aminobenzoic acid alkyl ester to obtain a polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR4## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000, and (B) reacting the above polyetherpolyol derivative with at least 2-valent polyisocyanate.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |