FIELD: chemical technology. SUBSTANCE: method of polyurethanes preparing in solution involves interaction of hydroxyl-containing polyester, diisocyanate and lengthener of chain (diamine or diol) in the medium of amide solvent containing from 0.5 to 20.0% of polyurethane mass, polyurea, which is synthesized preliminary in it at the finely divided form. Synthesis is carried out in the presence of organotin catalyst. Polyurethane solution is stable for more than 1 month. Synthesized product is used for making of coating and porous films. EFFECT: improved method of synthesis.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING POLYURETHANEUREA IN SOLUTION | 1991 |
|
SU1825504A3 |
| METHOD OF OBTAINING POLYURETHAN SOLUTION | 0 |
|
SU664425A1 |
| METHOD OF PREPARING POLYESTER URETHANE SOLUTION IN ETHYL ACETATE | 1993 |
|
RU2042691C1 |
| METHOD OF SYNTHESIS OF POLYURETHANE AS FIBROUS PARTICLES | 1992 |
|
RU2049096C1 |
| METHOD FOR PREPARATION OF POLYESTERURETHANE IONOMERS, CONTAINING ZWITTERIONIC LINKS | 0 |
|
SU1654302A1 |
| METHOD OF PREPARING OF THERMOPLASTIC POLYURETHANE ELASTOMERS IN POWDER-LIKE FORM | 1992 |
|
RU2031905C1 |
| PROCESS FOR PREPARING POLYESTERURETHANES IN SOLUTION | 0 |
|
SU930918A1 |
| POLYSTERURETHANE COMPOUND FOR MAKING MICROPOROUS FILMS | 0 |
|
SU1509382A1 |
| 0 |
|
SU246046A1 | |
| METHOD OF PREPARING LINEAR POLYURETHANE SOLUTIONS | 1992 |
|
RU2050373C1 |
