| abstract |
SUMMARY OF THE INVENTION The present invention provides a copolymer which can be used as an oil gelling agent which can be used to prepare a stable oily gelatinous composition. The copolymer of the present invention is characterized by containing a hydrophobic monomer represented by the following formula (1) and a hydrophilic monomer represented by the following formula (2) and/or the following formula (3).n□n(In the formula (1), R1 is a linear or branched alkyl group having 16 to 22 carbon atoms. R2 is a hydrogen atom or a methyl group)n□n(In the formula (2), R3 is a hydrogen atom, a glyceryl group, a linear or branched hydroxyalkyl group having 1 to 4 carbon atoms, or a polypropylene glycol group represented by -(C3H6O)nH (but n is 2 to An integer of 10). R4 is a hydrogen atom or a methyl group)n□n(In the formula (3), R5 is a hydrogen atom or a methyl group. R6 is a linear or branched alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group, or a substituent represented by the following formula (4) )n□ |