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| Modification of castor oil and its application in oil-in-water concrete release agent |
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| DOI：10.12166/j.zgyz.1003-7969/2020.08.016 |
| KeyWord:concrete release agent castor oil silane conjugate agent emulsion |
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| Abstract: |
| Castor oil has the advantages of high hydroxy value, good low temperature stability and low coefficient of friction. Castor oil was modified with isophorone diisocyanate(IPDI) and silane conjugate agent KH-550 to improve its release effect, and it was emulsified with hydrogen-containing silicone oil to obtain a low-cost, environmentally friendly new release agent. The synthetic products were analyzed by infrared spectroscopy and the emulsification conditions were discussed. The infrared spectroscopy results showed that the KH-550 terminal IPDI modified castor oil was successfully prepared, then it was prepared into the corresponding emulsion, the release performance test showed that under the conditions of the mass fraction of hydrogen-containing silicone oil 15%, m(Span-60)∶ m(Tween-60)=0.43∶ 0.57 and the mass fraction of the emulsifier 15%, oil in water concrete release agent with outstanding stability was obtained and in the case of dilution doubled the release effect was good, which could meet the requirement of industry standard JC/T 949—2005. |
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