Stabilizers

A compound of formula (Ia)

• wherein
• 2, 3 or 4 of the radicals R1 are C4-C20alkoxy, C3-C12cycloalkoxy or a group
• and the remaining radicals R1 are hydrogen, oxygen or hydroxyl;
• and
• the radicals R2 and R3 are independently of one another hydrogen, C1-C12alkyl, C5-C12cycloalkyl unsubstituted or substituted by 1 to 3 C1-C4alkyl;
• phenyl unsubstituted or substituted by 1 to 3 radicals selected from —OH and C1-C10alkyl;
• C7-C9phenylalkyl unsubstituted or substituted on the phenyl by 1 to 3 radicals selected from —OH and
• C1-C10alkyl;
• or a group of formula (I-1)
• wherein R4 is hydrogen, C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• or
• the radicals R2 and R3, together with the nitrogen they are attached to, form a morpholino group.

A composition comprising a product mixture containing components b-I, b-II, b-III and b-IV;

• component b-I being a compound of formula (I) with a degree of substitution of 1 in an amount of from 5 to 25 parts by weight,
• component b-II being a compound of formula (I) with a degree of substitution of 2 in an amount of from 5 to 35 parts by weight,
• component b-III being a compound of formula (I) with a degree of substitution of 3 in an amount of from 10 to 45 parts by weight and
• component b-IV being a compound of formula (I) with a degree of substitution of 4 in an amount of from 10 to 45 parts by weight, the sum of the parts of components bI to bIV being 100;
• formula (I) being
• wherein
• the radicals R1 are C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• wherein for component b-I, b-II and b-III the radicals R1 can additionally be hydrogen, oxygen or hydroxyl;
• where degree of substitution denotes the number of substituents R1 which are C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• and
• the radicals R2 and R3 are independently of one another hydrogen, C1-C12alkyl, C5-C12cycloalkyl unsubstituted or substituted by 1 to 3 C1-C4alkyl;
• phenyl unsubstituted or substituted by 1 to 3 radicals selected from —OH and C1-C10alkyl;
• C7-C9phenylalkyl unsubstituted or substituted on the phenyl by 1 to 3 radicals selected from —OH and
• C1-C10alkyl;
• or a group of formula (I-1)
• wherein R4 is hydrogen, C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• the radicals R2 and R3, together with the nitrogen they are attached to, form a morpholino group.

An agricultural article made of

• (a) a natural or synthetic polymer subject to degradation induced by light, heat or oxidation, and
• (b) 0.001 to 10% by weight, relative to the weight of the natural or synthetic polymer, of a product mixture containing components b-I, b-II, b-III and b-IV;
• component b-I being a compound of formula (I) with a degree of substitution of 1 in an amount of from 5 to 25 parts by weight,
• component b-II being a compound of formula (I) with a degree of substitution of 2 in an amount of from 5 to 35 parts by weight,
• component b-III being a compound of formula (I) with a degree of substitution of 3 in an amount of from 10 to 45 parts by weight and
• component b-IV being a compound of formula (I) with a degree of substitution of 4 in an amount of from 10 to 45 parts by weight, the sum of the parts of components bI to bIV being 100;
• formula (I) being
• wherein
• the radicals R1 are C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• wherein for component b-I, b-II and b-III the radicals R1 can additionally be hydrogen, oxygen or hydroxyl;
• where degree of substitution denotes the number of substituents R1 which are C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• and
• the radicals R2 and R3 are independently of one another hydrogen, C1-C12alkyl, C5-C12cycloalkyl unsubstituted or substituted by 1 to 3 C1-C4alkyl;
• phenyl unsubstituted or substituted by 1 to 3 radicals selected from —OH and C1-C10alkyl;
• C7-C9phenylalkyl unsubstituted or substituted on the phenyl by 1 to 3 radicals selected from —OH and
• C1-C10alkyl;
• or a group of formula (I-1)
• wherein R4 is hydrogen, C4-C20alkyl, C4-C20alkoxy, C3-C12cycloalkoxy or a group
• or
• the radicals R2 and R3, together with the nitrogen they are attached to, form a morpholino group.