Claims
- 1. A process for the preparation of N,O-disubstituted urethanes by reacting (a) substituted ureas with (b) alcohols at temperatures of from 120.degree. to 350.degree. C., characterized in that (c) N-unsubstituted urethanes and/or (d) urea and/or polyurets are used as further reactants in a quantity of at least 10% by weight, based on the quantity of substituted urea and the reaction is carried out in the presence of no more than 5% by weight, based on the sum of starting materials, of esterification catalysts for carboxylic acids.
- 2. The process of claim 1 in which the substituted ureas (a) are N,N'-disubstituted ureas.
- 3. The process of claim 1 in which the substituted ureas (a) are linear polyureas.
- 4. The process of claim 1, characterized in that the reaction is carried out in the presence of a polar solvent.
- 5. The process of claim 4, characterized in that the reaction is carried out in the presence of .epsilon.-caprolactam as solvent.
Priority Claims (1)
Number |
Date |
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2943550 |
Oct 1979 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 197,041, filed Oct. 15, 1980.
US Referenced Citations (3)
Non-Patent Literature Citations (1)
Entry |
Paquin, Chem. Abs., 42 (1948) 123(i). |
Continuations (1)
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Number |
Date |
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Parent |
197041 |
Oct 1980 |
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