Elastic materials prepared from energy-curable liquid compositions

A method of making an elastic material having an elongation greater than 150% as measured according to ASTM D638-02a, a resiliency greater than 12% as measured according to ASTM D2632-01 (reapproved 2008), and a Shore A hardness of at least 10 as measured by ASTM D2240-15e1, and wherein the elastic material is an energy-cured reaction product of a curable composition which is a liquid at 25° C. and which is comprised of components a), b) and c):

• a) 43 to 89.9% by weight, based on the total weight of components a), b) and c), of (meth)acrylate-functionalized oligomer having no more than two (meth)acrylate functional groups per molecule on average, wherein the number average molecular weight of component a) as a whole as measured using gel permeation chromatography and polystyrene standards is at least 10,000 Daltons;
• b) 10 to 55% by weight, based on the total weight of components a), b) and c), of:
• i) at least one high Tg monoacrylate-functionalized monomer and at least one low Tg monoacrylate-functionalized monomer or
• ii) at least one monomer of formula
• wherein:
• R6 and R7 are independently selected from H, alkyl, aryl, -L3-C(═O)—R12, cycloalkyl, aminoalkyl and alkoxyalkyl;
• or R6 and Ry may form, with the nitrogen atom to which they are attached, a 4 to 10-membered ring;
• R8, R9 and R10 are independently selected from H, alkyl and Cl;
• R12 is H or alkyl;
• and
• L3 is alkylene;
• and
• c) 0.1 to 10% by weight, based on the total weight of components a), b) and c), of at least one multi(meth)acrylate-functionalized monomer having a molecular weight of less than 1000 Daltons and at least two (meth)acrylate functional groups per molecule,
• the method comprising energy-curing the curable composition.