Patent US3912680A successfully refreshed from Google Patents.
US3912680A
Expired / Lapsed
US
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Light fast polyurethane urea coating solutions
Assignee: Bayer AG
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Filing: 1974-07-22
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Granted: 1975-10-14
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Expires: 1994-07-22
Abstract
Abstract A process for the preparation of stable polyurethane urea solutions by chain lengthening with bifunctional hydrazide compounds prepolymers prepared from dihydroxy compounds and excess 1-isocyanato-3-isocyanato-methyl-3,5,5trimethylcyclohexane. The polyurethane ureas dissolved in a mixture of water, aromatic hydrocarbons and aliphatic alcohols can be used for producing coatings which have exceptional light fastness.
Inventors
- 👤 Harald Oertel
- 👤 Bruno Zorn
- 👤 Hans Joachim Koch
- 👤 Gerhard Berndt
- 👤 Klaus Noll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:45
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/10; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
STABLE SOLUTION OF POLYURETHANE UREAS FROM PREPOLYMERS WITH TERMINAL ISOCYNATE GROUPS, AND DIHYDRIZIDE COMPOUNDS IN SLIGHTLY POLAR, READILY VOLATILE SOLVENT PREPARED BY REACTING A. A PREPOLYMER PREPARED FROM I. POLYHYDROXYL COMPOUNDS WITH A MOLECULAR WEIGHT OF 500 TO 5000 AND II. AN ALIPHATIC OR CYCLOALIPHATIC DIISOCYANATE WITH A PROPORTION OF AT LEAST 75 MOLS % OF 1-ISOCYNATO-3ISOCYANATOMETHYL-3,5,5-TRIMETHYLCYCLOHEXANE WITH B. AN AQUEOUS SOLUTION OF A DIHYDRAZIDE COMPOUNDS WHICH HAS BEEN DISSOLVED IN 0.5 TO 5 TIMES ITS WEIGHT OF WATER, THE REACTION BEING CARRIED OUT IN A SOLVENT MIXTURE COMPRISING I. AROMATIC HYDROCARBONS OR ALIPHATIC CHLORINATED HYDROCARBONS, II. ALIPHATIC, OR CYCLOALIPHATIC MONOHYDRIC ALCOHOLS AND III. WATER THE RATIO OF I/II BEING BETWEEN 1:10 AND 10:1 AND THE TOTAL PROPORTION OF WATER IN THE SOLVENT BEING BETWEEN 0.5 AND 15%
Claim 2
Dependent Claim
128 words
STABLE SOLUTION OF POLYURETHANE UREAS FROM PREPOLYMERS WITH TERMINAL ISOCYNATE GROUPS, AND DIHYDRIZIDE COMPOUNDS IN SLIGHTLY POLAR, READILY VOLATILE SOLVENT PREPARED BY REACTING A. A PREPOLYMER PREPARED FROM I. POLYHYDROXYL COMPOUNDS WITH A MOLECULAR WEIGHT OF 500 TO 5000 AND II. AN ALIPHATIC OR CYCLOALIPHATIC DIISOCYANATE WITH A PROPORTION OF AT LEAST 75 MOLS % OF 1-ISOCYNATO-3ISOCYANATOMETHYL-3,5,5-TRIMETHYLCYCLOHEXANE WITH B. AN AQUEOUS SOLUTION OF A DIHYDRAZIDE COMPOUNDS WHICH HAS BEEN DISSOLVED IN 0.5 TO 5 TIMES ITS WEIGHT OF WATER, THE REACTION BEING CARRIED OUT IN A SOLVENT MIXTURE COMPRISING I. AROMATIC HYDROCARBONS OR ALIPHATIC CHLORINATED HYDROCARBONS, II. ALIPHATIC, OR CYCLOALIPHATIC MONOHYDRIC ALCOHOLS AND III. WATER THE RATIO OF I/II BEING BETWEEN 1:10 AND 10:1 AND THE TOTAL PROPORTION OF WATER IN THE SOLVENT BEING BETWEEN 0.5 AND 15%
Claim 3
Dependent Claim
24 words
The product of claim 1 wherein the polyurethane ureas are prepared from prepolymers with terminal isocyanate groups, low molecular weight diisocyanates and dihydrazide compounds.
Claim 4
Dependent Claim
26 words
The product of claim 1 wherein diols with molecular weights between 62 and 500 are used in the preparation of the prepolymer with terminal NCO groups.
Claim 5
Dependent Claim
46 words
The product of claim 1 wherein monomeric aliphatic and cycloaliphatic diisocyanates are used in the preparation of the prepolymers with terminal NCO groups and are mixed in so tha the NCO content of the mixture, based on isocyanate components, is between 2.0 and 7.0% by weight.
Claim 6
Dependent Claim
13 words
The product of claim 1 wherein the solvent mixture includes chlorinated aromatic hydrocarbons.
Claim 7
Dependent Claim
43 words
The product according to claim 1 characterized in that the chain lengthening agents used are aliphatic alkylene dicarboxylic acid hydrazides containing 1 to 10 carbon atoms in the alkylene chain, semicarbazide alkylene hydrazides, semi-carbazide alkylene hydrazides, semicarbazide alkylene carbazic esters and aminoalkyl semicarbazides.
Claim 8
Dependent Claim
52 words
The product according to claim 1, wherein the solvent components used are aromatic hydrocarbons with a boiling range of up to 178*C or trichloroethylene, perchloroethylene, secondary or tertiary aliphatic alcohols and water, the ratio of hydrocarbons to alcohols being between 3:1 and 1:3 and the water content less than 10% by weight.
Claim 9
Dependent Claim
92 words
Stable solutions of polyurethane ureas comprising I. between 5 and 40% by weight of a polyurethane urea prepared from a. a prepolymer from polyhydroxyl compounds with molecular weight of 500 to 5000 and an aliphatic and/or cycloaliphatic diisocyanate with proportion of at least 75 mols % of 1-isocyanate-3-isocyanatomethyl-3,5,5-trimethyl-cyclohexane and b. dihydrazide-compounds ii. aromatic hydrocarbons and/or aliphatic chlorinated hydrocarbons, iii. aliphatic and/or cycloaliphatic monohydric alcohols and IV. water, the ratio of (II)/(III) being between 1:10 and 10:1 and the total proportion of water in the solvent being between 0.5 and 15% by weight.
Claim 10
Dependent Claim
92 words
Stable solutions of polyurethane ureas comprising I. between 5 and 40% by weight of a polyurethane urea prepared from a. a prepolymer from polyhydroxyl compounds with molecular weight of 500 to 5000 and an aliphatic and/or cycloaliphatic diisocyanate with proportion of at least 75 mols % of 1-isocyanate-3-isocyanatomethyl-3,5,5-trimethyl-cyclohexane and b. dihydrazide-compounds ii. aromatic hydrocarbons and/or aliphatic chlorinated hydrocarbons, iii. aliphatic and/or cycloaliphatic monohydric alcohols and IV. water, the ratio of (II)/(III) being between 1:10 and 10:1 and the total proportion of water in the solvent being between 0.5 and 15% by weight.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |