Silyl polymeric benzoic acid ester compounds, uses, and compositions thereof

An organosilicon progressive photoprotective polymer obtainable by a process which comprises the reaction of a monomer of formula (I):

• wherein:
• R is selected from the group consisting of (i), (ii), (iii), and (iv):
• R1, R2, R3, R4 and R5 are independently selected from the group consisting of H, linear or branched (C1-C6)alkyl, (C3-C6)cycloalkyl, OR6, NH2, NHR7, NR8R9, COOH, COOR10, CONH2, CONHR11, CONR12R13, SO2NH2, SO2NHR14, and SO2NR15R16;
• R6 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R7 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R8 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R9 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• or R8 and R9 taken together with the nitrogen atom to which they are attached form a pyrrolidine, piperidine or morpholine ring;
• R10 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R11 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R12 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R13 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• or R12 and R13 taken together with the nitrogen atom to which they are attached form a pyrrolidine, piperidine or morpholine ring;
• R14 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R15 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R16 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• or R15 and R16 taken together with the nitrogen atom to which they are attached form a pyrrolidine, piperidine or morpholine ring;
• A is H, linear or branched (C1-C6)alkyl, (C3-C6)cycloalkyl, OR′1, NH2, NHR′2 or NR′3R′4;
• L is a single bond, —CH2—, or —CH2—CH(RL)—
• Z is NH or O;
• Ra is linear or branched (C1-C6)alkyl, linear or branched (C2-C6)alkenyl, (C3-C6)cycloalkyl or phenyl;
• Rb is linear or branched (C1-C6)alkyl, linear or branched (C2-C6)alkenyl, (C3-C6)cycloalkyl or phenyl;
• Rc is linear or branched (C1-C6)alkyl, linear or branched (C2-C6)alkenyl, (C3-C6)cycloalkyl or phenyl;
• R′1 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R′2 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R′3 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• R′4 is linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• or R′3 and R′4 taken together with the nitrogen atom to which they are attached form a pyrrolidine, piperidine or morpholine ring;
• RL is H, linear or branched (C1-C6)alkyl or (C3-C6)cycloalkyl;
• n is an integer selected from 0 and 1;
• p is an integer selected from 2, 3 and 4;
• s is an integer selected from 0 and 1;
• t is an integer selected from 0 and 1;
• with a compound of formula (IV):
• wherein:
• Rd is a linear or branched (C1-C6)alkyl;
• Re, Rf and Rg are independently a linear or branched (C1-C6)alkyl, linear or branched (C2-C6)alkenyl, (C3-C6)cycloalkyl or phenyl,
• w1 and w2 are independently 0 or 1,
• in an alkanol/water mixture, wherein the alkanol is a linear or branched alkanol having 1 to 6 carbon atoms,
• and in the presence of a nitrogen-containing basic compound selected from the group consisting of ammonia, mono-alkylamine, di-alkylamine, tri-alkylamine, mono-alkanolamine, di-alkanolamine, and tri-alkanolamine, wherein both alkyl and alkanol groups are linear or branched having 1 to 6 carbon atoms,
• characterized in that the organosilicon progressive photoprotective polymer exhibits a micro- or nanoparticle form.