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J. Jęczalik


Modification of a polyetherol polyurethane elastomer (EPUR) with hydrocarbon plasticizers


Polimery 1995, No 2, 99


DOI: dx.doi.org/10.14314/polimery.1995.099

Summary

The results of investigations on synthesis of polyurethane elastomers (EPUR) with the use as modifier of carbon carbolineum or a petroleum-derived P-3 plasticizer were presented. The useful properties of modified EPURs essential in their applications as sealants in the building engineering were determined, namely: tensile strength and elongation at break, adhesion to concrete, and resistance to water, petrol and frost. EPURs prepared from two-component systems were compared with those prepared in one-shot method by mixing the same initial substrates just before re action and no statistically valid differences were revealed. The hydrocarbon-type modifiers have a plasticizing action — they lower tensile strength and increase elongation at break, the influence of carbolineum being higher than that of petroleum plasticizer. The modified EPURs have a good adhesion to concrete (decreasing with an increase in modifier content). EPUR prepared according to an optimum formulation (with 30 wt.% of hydrocarbon modifier) meets the demands made to a sealant.


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