FIELD: chemistry.
SUBSTANCE: this invention relates to production of polyesters and can be used for production of resilient polyurethanes. Polyesters are obtained by polycondensation of adipic acid, ethylene glycol and 1,4-butanediol at 140 °C gradually increasing temperature up to 195±5 °C. Molar ratio of adipic acid, ethylene glycol and 1,4-butanediol is 1.1:0.8:0.4 respectively. After adding of 0.1-5 % of laminated silicates used as a catalyst the vacuum polycondensation is made up to acid number 1.8-2 mg KOH/g and hydroxyl number of 60.3-67.2 mg KOH/g.
EFFECT: invention allows to reduce duration of process and reduces power consumption for production of polyesters.
1 cl, 1 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PREPARING COMPLEX POLYESTERS FOR POLYURETHANES (VARIANTS) | 2004 |
|
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| OLIGOESTER AS COATING COMPOSITION COMPONENT | 2013 |
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| AMORPHOUS AND/OR SEMICRYSTALLINE ESTER COPOLYMERS CONTAINING BETA- HYDROXYALKYLAMIDE GROUPS AND A METHOD OF PREPARATION THEREOF | 1997 |
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RU2181731C2 |
