Patent ID: 6960619

Claim:
A foamable, photo-polymerizable liquid composition comprising: a) at least two acrylic-based reactionable oligomers, b) at least a first and a second radical producing means, capable to liberate radicals, required for polymerization of said oligomers upon exposing the composition respectively to a light or to ambient temperature, c) at least a first and a second blowing agent, capable to supply a gas medium for foaming the liquid composition, wherein said at least two acrylic-based reactionable oligomers comprise a first oligomer, being at least three functional oligoester provided with terminate acrylic groups and a second oligomer, being two fuctional oligomer provided with at least two urethane groups and at least two terminate acrylic and/or methacrylic groups, and wherein the weight ratio between the said first and said second oligomer lies betveen 1:0.5 to 1:0.2.