| 摘要 |
Oligomers of the formula <IMAGE> wherein: (1) at least one A=-CH2CHR1COODOH (a) (R1=H, CH3 and D=C1-C4 alkylene), the other A's=H or C1-C4 alkyl, it being possible for at least a part of the residues (a) to be converted into A1=-CH2CHR1COODOCONHD1NCO (D1=divalent organic residue), it being possible for at least a part of the residues A1 to be converted into A2=-CH2CHR1COODOCONHD1NHCOOR2 (R2=monovalent radical obtained by removal of OH from a monoalcohol containing a vinylidene group); (2) at least one A=D2OCONHD'1NHCOOR'2 (b) where D2=C1-C4 alkylene or -D3-(-O-D3-)n-, with D3=C1-C4 alkylene and n=1-12; D'1 analogous to D1; R'2 analogous to R2; the other residue(s) A denoting -D2OCONHD'1NCO. These oligomers are intended especially to be copolymerized under ultraviolet radiation in a reactive diluent and in the presence of an initiator so as to form (co)polymers which have good hardness and good thermal resistance and which can be employed in the field of coatings, inks, and photopolymerizable adhesives.
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