US3926909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dibenzyl hydroxyl amine stabilizer for spandex
Assignee: Globe Manufacturing Co
•
Filing: 1974-08-16
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Granted: 1975-12-16
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Expires: 1994-08-16
Abstract
Abstract Dibenzyl hydroxylamine and related compounds are stabilizers for protecting spandex and other forms of polyurethanes against discoloration in exposure to combustion fumes, ultraviolet light and smog atmosphere.
Inventors
- 👤 Peter Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/17; C10; C10M; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/26; C10M2215/28; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/46; Y; Y10; Y10S; Y10S528/00; Y10S528/906; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/296; Y10T428/2964; Y10T442/00; Y10T442/20; Y10T442/259
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
14 words
POLYUREHANE STABILIZED AGAINST FUME DISCOLORATION HAVING INCORPORATED THEREIN A SUBSTITUTED HYDROXYLAMINE OF THE FORMULA
Claim 2
Dependent Claim
14 words
POLYUREHANE STABILIZED AGAINST FUME DISCOLORATION HAVING INCORPORATED THEREIN A SUBSTITUTED HYDROXYLAMINE OF THE FORMULA
Claim 3
Dependent Claim
12 words
A polyurethane according to claim 1 in the form of spandex fiber.
Claim 4
Dependent Claim
44 words
A spandex fiber according to claim 2 wherein X is phenyl, or phenyl substituted with alkyl of 1 to 12 carbon atoms, halogen of atomic weight 9 to 80, phenyl, phenoxy, alkoxy of 1 to 12 carbon atoms, hydroxy, carboxy, carbo-lower alkoxy, or amide.
Claim 5
Dependent Claim
44 words
A spandex fiber according to claim 3 wherein X is phenyl or phenyl substituted with alkyl of 1 to 4 carbon atoms, chlorine, alkoxy of 1 to 4 carbon atoms, hydroxy, carboxy, carboalkoxy wherein the alkoxy has 1 to 4 carbon atoms or amide.
Claim 6
Dependent Claim
25 words
A spandex fiber according to claim 4 wherein X is phenyl or phenyl substituted with alkyl of 1 to 4 carbon atoms, chlorine or hydroxy.
Claim 7
Dependent Claim
13 words
A polyurethane according to claim 1, wherein the substituted hydroxylamine is dibenzyl hydroxylamine.
Claim 8
Dependent Claim
12 words
A polyurethane according to claim 6 in the form of spandex fiber.
Claim 9
Dependent Claim
16 words
A spandex fiber according to claim 7 containing 0.01 to 20 percent of the dibenzyl hydroxylamine.
Claim 10
Dependent Claim
16 words
A spandex fiber according to claim 8 containing 0.1 to 10 percent of the dibenzyl hydroxylamine.
Claim 11
Dependent Claim
16 words
A spandex fiber according to claim 9 containing 0.5 to 5 percent of the dibenzyl hydroxylamine.
Claim 12
Dependent Claim
27 words
A process of preparing the product of claim 7 comprising incorporating the dibenzyl hydroxylamine with a polyurethane prepolymer and then forming the spandex fiber after the incorporation.
Claim 13
Dependent Claim
17 words
A process according to claim 11, wherein the spandex fiber is formed by reaction spinning the prepolymer.
Claim 14
Dependent Claim
21 words
A process according to claim 11, wherein the spandex fiber is formed by solution extrusion into a nonsolvent for the polyurethane.
Claim 15
Dependent Claim
30 words
A process of preparing the product of claim 7 comprising incorporating the dibenzyl hydroxylamine in a lubricant for the spandex fiber and then applying the lubricant to the spandex fiber.
Claim 16
Dependent Claim
12 words
A process according to claim 14 wherein the lubricant is mineral oil.
Claim 17
Dependent Claim
34 words
A process of preparing the product of claim 7 comprising incorporating the dibenzyl hydroxylamine in an aqueous scour liquor for the spandex fiber and then applying the aqueous scour liquor to the spandex 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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |