Cyclic phosphonite stabilizers

Claim 2

New phosphonites of the formula I ##STR31## wherein R 1 and R 2 independently of one another are a hydrocarbon radical, or halogen, x and y independently of one another are 0, 1, 2 or 3, n is 2, 3, 4, 5 or 6, and R 3 is a n-valent aliphatic, alicyclic, aromatic, araliphatic each optionally containing N, O, or S atoms or heterocyclic hydrocarbon residue.

Claim 3

Phosphonites according to claim 1 of the formula I wherein R 1 is C 1 -C 8 alkyl, x is 0, 1 or 2 and y is 0, n is 2, 3, 4, 5 or 6 and R 3 , if n is 2, denotes C 2 -C 22 alkylene which may optionally be interrupted by --O--, --S-- or --N(R 4 )--, whereby R 4 is C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl, C 6 -C 14 aryl, benzyl or allyl, and R 3 denotes furthermore butenylene or butynylene, C 5 -C 12 cycloalkylene, C 6 -C 14 arylene, C 7 -C 22 alkarylene, 1,4-dithian-2,5-diyl or a residue of the formula --CH 2 --CH 2 --R 5 --, wherein R 5 is a member of the group consisting of ##STR32## wherein R 6 and R 6 ' denote independently of one another hydrogen or C 1 -C 6 alkyl, and R 3 denotes furthermore a group of the formula ##STR33## wherein r is 0 or 1 and R 7 denotes --O--, --S-- or ##STR34## whereby R 8 and R 9 denote independently of one another hydrogen or C 1 -C 8 alkyl or R 8 and R 9 form together with the carbon atom to which they are attached a ring containing 5 to 12 carbon atoms, and R 3 denotes furthermore 1,4-cyclohexylenedimethylene; 1,3,3-trimethyl-cyclohexylene-1,5 or a group of the formula II ##STR35## wherein s denotes 0 or 1, and R 10 and R 11 denote independently of one another hydrogen, C 1 -C 12 alkyl or cyclohexyl, and R 12 denotes --O--, --S-- or ##STR36## whereby R 13 denotes hydrogen or C 1 -C 8 alkyl and R 14 denotes hydrogen, C 1 -C 8 alkyl or one of the groups --(CH 2 ) a --COOR 15 or --CH 2 --CH(R 16 )--S--R 17 , wherein a is 1 or 2, R 15 denotes C 1 -C 18 alkyl, C 5 -C 8 cycloalkyl, phenyl or benzyl and R 16 is hydrogen or methyl and R 17 denotes C 1 -C 18 alkyl, cyclohexyl, phenyl, benzyl or a group --(CH 2 ) a --COOR 15 wherein a and R 15 are as defined above, or R 13 and R 14 together with the carbon atom to which they are attached form a ring containing 5 to 12 carbon atoms and R 3 denotes furthermore a group of the formula III ##STR37## wherein t is 0, 1, 2 or 3 R 18 is --O-- or --NH--, b is 1 to 18, and R 10 and R 11 are as defined above, and n is 0 or 1 with the proviso that t cannot be 0 when n is 0, and R 3 , if n is 3, denotes a trivalent aliphatic C 3 H 5 to C 7 H 13 hydrocarbon radical or one of the groups ##STR38## wherein d is 1 to 4 and R 19 is a group of the formula IV ##STR39## and R 10 and R 11 are as defined above, and R 20 is a group of the formula IV wherein R 10 and R 11 are as defined above, or R 20 is --CH 2 --CH 2 -- or a group of the formula V ##STR40## R 21 denotes a group of the formula VI ##STR41## c is 0, 1, 2 or 3, and R 3 , if n is 4, denotes a tetravalent aliphatic C 4 H 6 to C 10 H 18 hydrocarbon radical or one of the groups VII or VIII ##STR42## wherein R 22 is a group of the formula VI and e denotes 1 or 2, and t is as defined above, and R 3 , if n is 5, denotes a pentavalent aliphatic C 5 H 7 to C 10 H 17 hydrocarbon radical or the group IX ##STR43## R 3 , if n is 6, denotes a hexavalent aliphatic C 6 H 8 to C 10 H 16 hydrocarbon radical.

Claim 4

Phosphonites according to claim 2 of the formula I wherein x and y are 0, and n is 2, 3 or 4, and R 3 , if n is 2, denotes C 2 -C 9 alkylene which may optionally be interrupted by --O-- or --S--, or R 3 denotes furthermore phenylene, or phenylene, which is mono- or dialkylated with a total number of 7 to 22 carbon atoms or a group of the formula II* ##STR44## wherein S denotes 0 or 1, and R 10 and R 11 denote independently of one another hydrogen or C 1 -C 8 alkyl and R 12 denotes --O--, --S-- or ##STR45## whereby R 13 is hydrogen or methyl, and R 14 is hydrogen, methyl or one of the groups (CH 2 ) a --COR 15 or --CH 2 --CH(R 16 )--S--R 17 wherein a and R 16 are as defined above and R 15 denotes C 1 -C 18 alkyl and R 17 is C 1 -C 12 alkyl or a group of the formula --(CH 2 ) a --COOR 15 , wherein a and R 15 are as herein defined and R 3 denotes furthermore a group of the formula III wherein R 10 denotes methyl or t.butyl and R 11 is t.butyl, R 18 is --O-- or --NH--, t is 2, b is 5 to 6 and n is 1, and R 3 if n is 3, denotes a trivalent aliphatic C 3 H 5 to C 7 H 13 hydrocarbon radical or a group of the formula ##STR46## wherein R 21 is as defined in claim 2, and R 3 if n is 4, denotes a group of the formula VII, wherein t is 2 and R 10 and R 11 denote t.butyl.

Claim 5

Phosphonites according to claim 3 of the formula I wherein x and y are 0, and n is 2 or 3, and R 3 if n is 2, denotes C 2 -C 6 alkylene, which may be optionally interrupted by --O-- or --S--, or R 3 denotes phenylene, phenylene, which is mono- or di-alkylated with total number of carbon atoms of 7-22, or a group of the formula II* wherein s denotes 0 or 1, and R 10 and R 11 denote independently of one another hydrogen, methyl, t.butyl, t-pentyl or 1,1,3,3-tetramethylbutyl and R 12 is --O--, --S-- or ##STR47## wherein R 13 and R 14 are hydrogen or methyl, and R 3 denotes furthermore a group of the formula III wherein R 10 denotes methyl or t.butyl and R 11 denotes t.butyl, R 18 is --O--, t is 2, b is 2 to 6 and n is 1, and R 3 , if n is 3, denotes ##STR48## or a group of the formula ##STR49## wherein R 21 is as defined in claim 3.

Claim 6

Phosphonites according to claim 1, of the formula I, wherein n is 2 or 3.

Claim 7

Phosphonites according to claim 2, wherein n is 2, and R 3 denotes C 7 -C 22 alkarylene, or a group of the formula II.

Claim 8

A composition stabilized against oxygen, light and heat comprising an organic material containing from 0.005 to 5% of a phosphonite according to claim 1.

Claim 9

A composition according to claim 7 wherein said organic material is a polyolefin.

Claim 10

The composition according to claim 8 wherein said polyolefin is polypropylene.