Glycerol (meth)acrylate carboxylic ester having a long shelf life

A storage stable composition, comprising:

• a) glycerol (meth)acrylate carboxylic esters selected from the group consisting of Formula (I) A, Formula (I) B and mixtures thereof, wherein, structurally, Formula (I) A and Formula (I) B are:
• and wherein:
• R1 is selected from the group consisting of H and CH3;
• R2 is selected from the group consisting of:
• hydrogen;
• a C1 to C30 aliphatic group optionally with a hydroxyl substituent;
• an aliphatic cyclic group with a C4 to C8 ring unsubstituted or substituted by N, S, O, or P;
• a C1 to C8 halogenated aliphatic group;
• an aromatic group having a ring with five or six carbons and optionally with a hydroxyl substituent;
• a heteroaromatic group substituted by N, S, O or P and having a ring with five or six carbons;
• and a C2 to C30 unsaturated aliphatic group;
• b) carboxylic acids of formula (II):
• wherein R2 is hydrogen;
• a C1 to C30 aliphatic group optionally with a hydroxyl substituent;
• an aliphatic cyclic group with a C4 to C8 ring unsubstituted or substituted by N, S, O, or P;
• a C1 to C8 halogenated aliphatic group;
• an aromatic group having a ring with five or six carbons and optionally with a hydroxyl substituent;
• a heteroaromatic group substituted by N, S, O or P and having a ring with five or six carbons;
• or a C2 to C30 unsaturated aliphatic group;
• and
• c) glycidyl (meth)acrylate;
• d) optionally, Broensted acids;
• wherein the sum total of the carboxylic acids of formula (II), and any Broensted acids that may be present, is in a molar ratio of from 1.01:1 to 2:1 relative to glycidyl (meth)acrylate, and this ratio is present after synthesis and before storage;
• and
• when stored at 30° C. for 8 months, the composition maintains at least 85% by weight diester and no more than 3% by weight triester.