Stabilizing mixtures for organic polymers comprising a pyrazolone, an organic phosphite or phosphonite and a hindered phenol
AssigneeGreat Lakes Chemical (Europe) GmbH
InventorsFabio Broussard, Daniele Girelli, Maria Lucia Wis, Carlo Neri, Vincenzo Malatesta
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Abstract
Stabilizing mixtures for organic polymers comprising: a) at least one compound belonging to the group of pyrazolones; b) at least one compound belonging to the group of organic phosphites or phosphonites; c) at least one compound belonging to the group of sterically hindered phenols; and d) at least one compound belonging to the group of sterically hindered amines. The above mixtures are useful in the stabilization to degradation caused by oxygen, heat and/or light, of organic polymers.
Claims22
Stabilizing mixtures for organic polymers comprising:
- (a) at least one compound belonging to the group of pyrazolones;
- (b) at least one compound belonging to the group of organic phosphites or phosphonites;
- (c) at least one compound belonging to the group of sterically hindered phenols;
- and, optionally,
- (d) at least one compound belonging to the group of sterically hindered amines, said compounds belonging to the group of pyrazolones (a) being selected from those having general formula (I) or (II):
- wherein
- R1 represents a hydrogen atom;
- a linear or branched C1-C18 alkyl group;
- a linear or branched C2-C18 alkenyl group;
- a linear or branched C2-C18 alkynyl group;
- a linear or branched C2-C8 alkoxyalkyl group;
- a C5-C8 cycloalkyl group;
- a heterocyclic group with 5 or 6 atoms containing at least one heteroatom selected from the group consisting of oxygen, nitrogen and sulfur, a C6-C20 aryl group;
- an amine group having general formula (III):
- or an acid or ester group having general formula (IV) or (V):
- —COOR9 (IV):
- —CH2COOR10 (V);
- wherein
- R2, R3, R4, R5 and R6, the same or different, each represents a hydrogen atom;
- a linear or branched C1-C18 alkyl group;
- a linear or branched C2-C18 alkynyl group;
- a linear or branched C2-C18 alkenyl group;
- a C5-C8 cycloalkyl group, or a C6-C20 aryl group;
- or, R2 and R3, considered jointly with the carbon atom to which they are bound, represent a C5-C8 cycloalkyl group;
- R7, R8, R9 and R10, the same or different, each represents a hydrogen atom;
- a linear or branched C1-C18 alkyl group;
- a C5-C8 cycloalkyl group;
- or a C6C20 aryl group;
- or, R7 and R8, considered jointly with the nitrogen atom to which they are bound, represent a heterocyclic group with 5 or 6 atoms optionally containing another heteroatom selected from oxygen, nitrogen or sulfur.
The stabilizing mixtures according to claim 6, wherein the compounds belonging to the group of sterically hindered amines (d) are selected from compounds (b′) having general formula (XXVI):
- wherein n is 1 or 2;
- G, G1 and G11 have the same meanings described above under claim 7;
- G13 represents a hydrogen atom, a C1-C12 alkyl group, a C2-C5 hydroxyalkyl group, a C5-C7 cycloalkyl group, a C7-C8 arylalkyl group, a C2-C18 alkanoyl group, a C3-C5 alkenoyl group, a benzoyl group, or a group having the following general formula:
- wherein G, G1, G11 have the same meanings defined above under claim 8;
- G14, when n is 1, represents a hydrogen atom, a C1-C18 alkyl group, a C3-C8 alkenyl group, a C5-C7 cycloalkyl group, a C1-C4 alkyl group substituted with a hydroxyl group, with a cyano group, with an alkoxycarbonyl group or with a carbamide group, a glycidyl group, a group having the formula —CH2—CH(OH)—Z or a group having the formula —CONH—Z wherein Z represents a hydrogen atom, a methyl or a phenyl;
- G14, when n is 2, represents a C2-C12 alkylene group, a C6-C12 arylene group, a xylylene group, a group of formula —CH2—CH(OH)—CH2— or a group having the formula —CH2—CH(OH)—CH2—O—D—O— wherein D represents a C2-C10 alkylene group, a C6-C15 arylene group, a C6-C12 cycloalkylene group;
- or, on the condition that G13 does not represent an alkanoyl group, an alkenoyl group or a benzoyl group, G14 can also represent a 1-oxo-(C2-C12)-alkylene group, a divalent radical of a dicarboxylic acid or of a dicarbamic acid, aliphatic, cycloaliphatic or aromatic, or also a —CO— group;
- or, when n is 1, G13 and G14 considered jointly, can also represent a divalent radical of a 1,2- or 1,3-dicarboxylic acid, aliphatic, cycloaliphatic or aromatic.
Polymeric compositions containing an organic polymer and an effective quantity against the degradation caused by oxygen, heat and/or light, of one of the stabilizing mixtures according to any of the previous claims.
Dependencies are inferred from the claim text.