| 摘要 |
PCT No. PCT/EP92/00453 Sec. 371 Date Oct. 22, 1992 Sec. 102(e) Date Oct. 22, 1992 PCT Filed Mar. 2, 1992 PCT Pub. No. WO92/15554 PCT Pub. Date Sep. 17, 1992.Non-ionic surface active compounds are provided having the formula (* CHEMICAL STRUCTURE *) wherein L is (* CHEMICAL STRUCTURE *) (* CHEMICAL STRUCTURE *) L' is a chemical bond, -O-, -S-, -NH-, -CONH- or -SO2NH-; R is a hydrophobic substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, or a substituted or unsubstituted aryl group; each of R1 and R2 independently is hydrogen or an alkyl group having from 1 to 4 carbon atoms; each of a and b independently is 0 or an integer from 1 to 3, provided that the sum of a and b is not greater than 3; and, each of x and y independently is an integer from 3 to 7. They may be used as coating aids or dispersing aids in the preparation of photographic materials.
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