Patent US9951002

R1 is branched alkyl of the structure (CH3(CH2)m)2CH—, wherein m is 2 or 3;

R2 is a linear alkyl of 1, 2, 3, 4, 5, 6, 7, 8, or 9 carbons, a branched alkyl of 3, 4, 5, 6, 7, 8, or 9 carbons, or an alkenyl or alkynyl of 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 carbons;

R3 is —(CH2)p—, wherein p is 2, 3, 4, 5 or 6;

R4 and R5 are the same or different, each a hydrogen, or a linear or branched alkyl of 1, 2, 3, 4, 5 or 6 carbons;

L1 and L2 are the same or different, of the structure —(CH2)n—, wherein n is 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18;

L3 is a bond;

X1 is —CO—O— whereby -L2-CO—O—R2 is formed;

X2 is S or O; and

X3 is —CO—O— whereby -L1-CO—O—R1 is formed; and

R1 is branched alkyl of the structure (CH3(CH2)m)2CH—, wherein m is 2 or 3;

R2 is a linear alkyl of 1, 2, 3, 4, 5, 6, 7, 8, or 9 carbons, a branched alkyl of 3, 4, 5, 6, 7, 8, or 9 carbons, or an alkenyl or alkynyl of 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 carbons;

R3 is —(CH2)p—, wherein p is 2, 3, 4, 5 or 6;

R4 and R5 are the same or different, each a hydrogen, or a linear or branched alkyl of 1, 2, 3, 4, 5 or 6 carbons;

L1 and L2 are the same or different, of the structure —(CH2)n—, wherein n is 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18;

L3 is of the structure —(CH2)q—, wherein q is 1, 2, 3, 4, 5 or 6;

X1 is —CO—O—, whereby -L2-CO—O—R2 is formed;

X2 is S or O; and

X3 is —CO—O—, whereby -L1-CO—O—R1 is formed; and