US4499221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane composition improved in dyeing property
Assignee: Toyobo Co Ltd
•
Filing: 1984-05-31
•
Granted: 1985-02-12
•
Expires: 2004-05-31
Abstract
Abstract A polyurethane composition improved in dyeing property which comprises (A) a polyurethane and (B) a tertiary nitrogen atom-containing polymer incorporated therein in an amount sufficient to stabilize the polyurethane (A), said polymer (B) being the reaction product between (C) a tertiary nitrogen atom-containing diol and an excessive amount of (D) an organic diisocyanate, the terminal isocyanate group in said reaction product being blocked with a monoamine and/or a dialkylhydrazine.
Inventors
- 👤 Minoru Saitoh
- 👤 Yoshikazu Arimatsu
- 👤 Katsuya Tani
- 👤 Hideyuki Mitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:17
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A polyurethane composition which comprises (A) a polyurethane and (B) a tertiary nitrogen atom-containing polymer incorporated therein in an amount sufficient to stabilize the polyurethane (A), said polymer (B) being the reaction product between (C) a tertiary nitrogen atom-containing diol and an excessive amount of (D) an organic diisocyanate, the terminal isocyanate group in said reaction product being blocked with a monoamine and/or a dialkylhydrazine.
Claim 2
Dependent Claim
65 words
A polyurethane composition which comprises (A) a polyurethane and (B) a tertiary nitrogen atom-containing polymer incorporated therein in an amount sufficient to stabilize the polyurethane (A), said polymer (B) being the reaction product between (C) a tertiary nitrogen atom-containing diol and an excessive amount of (D) an organic diisocyanate, the terminal isocyanate group in said reaction product being blocked with a monoamine and/or a dialkylhydrazine.
Claim 3
Dependent Claim
33 words
The composition according to claim 1, wherein the polymer (B) is incorporated in an amount of 10 to 400 milliequivalents (in terms of the tertiary nitrogen atom) per kilogram of the polyurethane (A).
Claim 4
Dependent Claim
90 words
The composition according to claim 1, wherein the diol (C) is a diol of the formula: HO--A--OH (I) wherein A is a divalent group of the formula: ##STR5## wherein R 1 and R 2 are, the same or different, each a C 1 -C 4 alkyl group, or when taken together with the adjacent nitrogen atom, they may represent a nitrogen-containing heterocyclic ring and R 3 is a C 1 -C 4 alkyl group, or of the formula: ##STR6## wherein R 4 is a C 1 -C 12 alkyl group.
Claim 5
Dependent Claim
15 words
The composition according to claim 3, wherein R 4 in the formula (III) is ethyl.
Claim 6
Dependent Claim
25 words
The composition according to claim 3, wherein R 1 and R 2 in the formula (II) are each a C 1 -C 4 alkyl group.
Claim 7
Dependent Claim
13 words
The composition according to claim 1, wherein the monoamine is diethylamine or butylamine.
Claim 8
Dependent Claim
11 words
The composition according to claim 1, wherein the dialkylhydrazine is dimethylhydrazine.
Claim 9
Dependent Claim
20 words
The composition according to claim 1, wherein the polymer (B) has a number average molecular weight of 2,000 to 6,000.
Claim 10
Dependent Claim
20 words
The composition according to claim 1, wherein the polyurethane (A) has a weight average molecular weight of 20,000 to 100,000.
Claim 11
Dependent Claim
22 words
The composition according to claim 1, which comprises additionally an antioxidizing agent, a ultraviolet ray absorber or a sugar fatty acid ester.
Claim 12
Dependent Claim
10 words
The composition according to claim 1 in a shaped form.
Claim 13
Dependent Claim
14 words
The composition according to claim 11, wherein the shaped form is an elastic fiber.
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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |