CROSSLINKING AGENT FOR POWDER COATING MATERIAL CONTAINING URETODIONE GROUP AND MODIFIED WITH DIMERIC DIOL
Poly-addition cpds. (I) which are solid at below 40 degrees C and liq. at above 125 degrees C contain (a) 0-2 wt% free NCO gps. (calculated. as NCO; mol. wt. 42), (b) 3-16 wt% uretdione gps. (calculated. as C2N2O2; mol. wt. 84) and (c) 10-22 wt% urethane gps. (calculated. as -NHCOO-; mol. wt. 59), i...
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Zusammenfassung: | Poly-addition cpds. (I) which are solid at below 40 degrees C and liq. at above 125 degrees C contain (a) 0-2 wt% free NCO gps. (calculated. as NCO; mol. wt. 42), (b) 3-16 wt% uretdione gps. (calculated. as C2N2O2; mol. wt. 84) and (c) 10-22 wt% urethane gps. (calculated. as -NHCOO-; mol. wt. 59), including at least 1 wt% urethane gps. obtd. by reaction of dimer-diols with NCO gps. Also claimed is the prodn. of (I). |
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