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US3635652A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for dyeing polyurethane foam in nonaqueous dye bath

Assignee: GAF Corp
•
Filing: 1968-07-05
•
Granted: 1972-01-18
•
Expires: 1988-07-05
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Abstract

Abstract A composition of matter comprising polyurethane foams and articles foamed therefrom, having applied thereto an essentially water-insoluble dyestuff of the class known as spirit or solventsoluble dyestuffs; particularly those dyestuffs of this class which are formed by the reaction of water-soluble dyes which contain water-solubilizing sulfonic or carboxylic acid groups with water-insoluble amines which are free from such solubilizing groups. In addition to the amine-salt-type of spirit or solventsoluble dyestuffs, the metallized O,O''-dihydroxy azo-type of spirit or solvent soluble-dyestuffs may be used. The invention is also concerned with a method for the production of dyed polyurethane foams which comprises applying to the polyurethane foam or article a solution of a water-insoluble, spirit or solvent-soluble dyestuff in a volatile organic solvent.

Inventors

  • 👤 Clemens Streck

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 10:13
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B69/00; C09B69/02; C09B69/04

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 14 words
The process according to claim 1 wherein the dyestuff is selected from group (a).
Claim 2
Dependent Claim 30 words
A process according to claim 1 wherein the dyestuff is present in the organic solvent in an amount of about 0.1 to 5.0 percent per 100 parts of organic solvent.
Claim 3
Dependent Claim 14 words
A process according to claim 1 wherein the dyestuff is selected from group (b).
Claim 4
Dependent Claim 17 words
A process according to claim 1 wherein the nonaqueous dyestuff solution is padded on the polyurethane foam.
Claim 5
Dependent Claim 12 words
A process according to claim 1 wherein the organic solvent is 2-ethoxyethanol.

References Cited (Backward Citations)

US2384001A Cited
US3120423A Cited
US3337289A Cited
US3432251A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-01-17 1975-07-19 1976-01-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-17 1979-07-19 1980-01-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-17 1983-07-19 1984-01-18 $7700.00 Window Closed / Lapsed

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