US4758475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isocyanate-free polyurethane dispersions
Assignee: Hoechst AG
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Filing: 1986-12-18
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Granted: 1988-07-19
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Expires: 2006-12-18
Abstract
Abstract Polyurethane dispersions based on reaction products from (A) bismethylolated urethanes having at least 2 urethane groups and (B) polyhydroxyl compounds which contain groups which are capable of ion formation, these groups being present in neutralized form, and a process for the preparation thereof. The use of the dispersions for the surface-coating of metal, plastics, glass, leather and paper.
Inventors
- 👤 Helmut Eckes
- 👤 Dieter Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08G; C08G71/00; C08G71/04; C08L; C08L75/00; C08L75/04; C09; C09D; C09D175/00; C09D175/04; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31529; Y10T428/31551; Y10T428/31558; Y10T428/31591; Y10T428/31598; Y10T428/31601; Y10T428/31605; Y10T428/31942
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
36 words
A polyurethane dispersion containing reaction products from (A) bismethylolated urethanes having at least two urethane groups, and (B) polyhydroxyl compounds which contain groups which are capable of ion formation, these groups being present in neutralized form.
Claim 2
Dependent Claim
36 words
A polyurethane dispersion containing reaction products from (A) bismethylolated urethanes having at least two urethane groups, and (B) polyhydroxyl compounds which contain groups which are capable of ion formation, these groups being present in neutralized form.
Claim 3
Dependent Claim
74 words
A process for the preparation of polyurethane dispersions as claimed in claim 1, wherein (A) bismethylolated urethanes having at least two urethane groups are reacted with (B) polyhydroxyl compounds which contain groups which are capable of ion formation, at 100° to 160° C. in the melt, the resultant reaction product is neutralized, mixed with a water-compatible solvent, optionally the solvent being added before the neutralization, and converted to a dispersion by addition of water.
Claim 4
Dependent Claim
23 words
The embodiment as claimed in claim 2, wherein dihydroxycarboxylic acids or alkanolamines of up to 20 carbon atoms are employed as polyhydroxyl compounds.
Claim 5
Dependent Claim
25 words
The embodiment as claimed in claim 2, wherein further polyhydroxyl compounds which are not capable of ion formation are employed together with the component (B).
Claim 6
Dependent Claim
22 words
The embodiment as claimed in claim 4, wherein diols or OH group-containing polyesters having molecular weights of 200 to 10,000 are employed.
Claim 7
Dependent Claim
30 words
The embodiment as claimed in claim 2, wherein alkali metal hydroxides, alkali metal carbonates, ammonia, amines, amino alcohols or acids and compounds which cause quaternization are employed for the neutralization.
Claim 8
Dependent Claim
18 words
Metal, plastics, glass, leather or paper having a surface coating based on dispersons as claimed in claim 1.
Claim 9
Dependent Claim
27 words
Metal, plastics, glass, leather or paper having a surface coating based on the dispersions as claimed in claim 1 as a mixture with epoxide or melamine resins.
Claim 10
Dependent Claim
17 words
A surface coating for metal, plastic, glass, leather and paper containing a polyurethane dispersion of claim 1.
Claim 11
Dependent Claim
16 words
A coating of claim 9, wherein the dispersions are admixed with an epoxide or melamine resin.
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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |