Polymeric invert emulsifiers

A polymeric invert emulsifier defined by Formula 1:

• X[(CH2CHR1O)n(CH2CHR2O)mR3]o Formula 1
• wherein X is a linking group derived from an organic compound containing at least two hydroxyl or amine groups capable of reacting with ethylene oxide;
• each R1 is independently —H or —CH3;
• each R2 is independently —H, unsubstituted or substituted branched aryl moiety of 1-22 carbons;
• or unsubstituted or substituted linear aryl moiety of 1-22 carbons;
• or unsubstituted or substituted branched alkyl moiety of 1-22 carbons;
• or unsubstituted or substituted linear alkyl moiety of 1-22 carbons;
• or —CH2OR4 with the proviso that at least one R2 is not hydrogen or methyl;
• each R3 is independently —H, unsubstituted or substituted saturated or unsaturated aryl hydrocarbon of 1-25 carbons;
• or unsubstituted or substituted saturated or unsaturated alkyl hydrocarbon of 1-25 carbons;
• or an ester group —C(═O)R5;
• R4 is a substituted or unsubstituted branched aryl moiety of 1-22 carbons;
• or a substituted or unsubstituted linear aryl moiety of 1-22 carbons;
• or a substituted or unsubstituted branched alkyl moiety of 1-22 carbons;
• or a substituted or unsubstituted linear alkyl moiety of 1-22 carbons;
• R5 is a substituted or unsubstituted saturated or unsaturated aryl moiety of 1-25 carbons;
• or a substituted or unsubstituted saturated alkyl moiety of 1-25;
• n is an integer of 3-300;
• m is an integer of 2-300;
• and
• o is an integer of 2-12;
• and
• further comprising a second emulsifier.