| abstract |
Oligomers of formula: (1) at least one A = -CH₂CHR¹COODOH (a) (R¹ = H, CH₃ and D = C₁-C₄ alkylene), the other A = H or C₁-C₄ alkyl, at least part of the remains (a) can be transformed into A¹ = -CH₂CHR¹COODOCONHD¹NCO (D¹ = divalent organic residue), at least part of the remains A¹ can be transformed into A² = -CH₂CHR¹COODOCONHD¹NHCOOR² (R² = monovalent radical obtained by elimination of OH from a monoalcohol containing a group vinylidene); (2) at least one A = -D²OCONHD′¹NHCOOR′² (b) or 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) representing -D²OCONHD′¹NCO.n n n These oligomers are intended in particular to be copolymerized under ultraviolet radiation in a reactive diluent and in the presence of an initiator, so as to form (co) polymers having good hardness and good thermal resistance, usable in the field of coatings, inks and light-curing adhesives. |