Patent US3970601A successfully refreshed from Google Patents.
US3970601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored poly (urethane) urea powders
Assignee: Bayer AG
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Filing: 1975-05-01
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Granted: 1976-07-20
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Expires: 1995-05-01
Abstract
Abstract The instant invention relates to thermoplastic polyurea powders, optionally containing urethane groups, characterized by A. a smooth, substantially spherical or lenticular surface, B. an average particle diameter of 5 to 1,000μ, preferably 10 to 200μ, C. a urea group content, and, optionally, a urethane group content, of 8 to 30% by weight, D. an ionic group content of 0.01-0.15 milliequivalents per gram of solids, preferably 0.02-0.1 milliequivalent per gram and E. 0.1 to 10% by weight, preferably 0.2 to 5% by weight, of an organic dye incorporated in the polymer molecule by way of at least one urethane and/or urea group, And the process of manufacture thereof.
Inventors
- 👤 Karl-Arnold Weber
- 👤 Helmut Reiff
- 👤 Dieter Dieterich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
In a process of producing direct or reverse coatings on substrates by the dry knife coating or screening process, the improvement wherein the coating material comprises thermoplastic polyurea powders characterized by a. a smooth, substantially spherical or lenticular surface, b. an average particle diameter of 5 to 1000 μ, c. a urea group content of from 8 to 30 percent by weight, d. an ionic group content of 0.01 to 0.15 milliequivalents per gram, said ionic group capable of salt formation, and e. from 0.1 to 10 percent by weight of an organic dye built into the polymer molecule by way of at least one urethane and/or urea group.
Claim 2
Dependent Claim
109 words
In a process of producing direct or reverse coatings on substrates by the dry knife coating or screening process, the improvement wherein the coating material comprises thermoplastic polyurea powders characterized by a. a smooth, substantially spherical or lenticular surface, b. an average particle diameter of 5 to 1000 μ, c. a urea group content of from 8 to 30 percent by weight, d. an ionic group content of 0.01 to 0.15 milliequivalents per gram, said ionic group capable of salt formation, and e. from 0.1 to 10 percent by weight of an organic dye built into the polymer molecule by way of at least one urethane and/or urea group.
Claim 3
Dependent Claim
40 words
The process of claim 1, wherein the average particle diameter is from 10 to 200 μ, the ionic group content is from 0.02 to 0.1 milliequivalents per gram, and said organic dye comprises from 0.2 to 5 percent by weight.
Claim 4
Dependent Claim
56 words
The process of claim 1, wherein said colored powder is further characterized by: f. a melting range of from 110° to 250°C, and g. an Intrinsic-Melt-Index-Curve resembling the ascending branch of a parabola and varying from 2 grams per 10 minutes to 50 grams per 10 minutes within a temperature interval of from 5° to 50°C.
Claim 5
Dependent Claim
111 words
In a process of coloring uncolored poly(urethane) urea powders, aqueous polyurethane suspensions and one-component polyurethanes which are dissolved in organic solvents by adding colorants thereto, the improvement wherein said colorant comprises thermoplastic polyurea powders characterized by a. smooth, substantially spherical or lenticular surface, b. an average particle diameter of 5 to 1000 μ, c. a urea group content of from 8 to 30 percent by weight, d. an ionic group content of 0.01 to 0.15 milliequivalents per gram, said ionic group capable of salt formation, and e. from 0.1 to 10 percent of an organic dye built into the polymer molecule by way of at least one urethane and/or urea group.
Claim 6
Dependent Claim
111 words
In a process of coloring uncolored poly(urethane) urea powders, aqueous polyurethane suspensions and one-component polyurethanes which are dissolved in organic solvents by adding colorants thereto, the improvement wherein said colorant comprises thermoplastic polyurea powders characterized by a. smooth, substantially spherical or lenticular surface, b. an average particle diameter of 5 to 1000 μ, c. a urea group content of from 8 to 30 percent by weight, d. an ionic group content of 0.01 to 0.15 milliequivalents per gram, said ionic group capable of salt formation, and e. from 0.1 to 10 percent of an organic dye built into the polymer molecule by way of at least one urethane and/or urea group.
Claim 7
Dependent Claim
40 words
The process of claim 4, wherein the average particle diameter is from 10 to 200 μ, the ionic group content is from 0.02 to 0.1 milliequivalents per gram, and said organic dye comprises from 0.2 to 5 percent by weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |