C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/41 (2006.01) C07C 317/36 (2006.01) C07C 317/44 (2006.01) C07C 323/36 (2006.01) C07C 323/52 (2006.01) C07C 381/00 (2006.01) C08K 5/372 (2006.01)
Patent
CA 2494341
Compounds of the formula (I) wherein R1 is C1-C18alkyl, C5-C12-cycloalkyl, phenyl, benzyl, or allyl; n is 1 or 2; if n is 1, R2 is C4-C18alkyl, C5- C12~cycloalkyl, aryl or heteroaryl, benzyl, allyl, (CH2),mCOOR3, or is (CH2)mCN; if n is 2, R2 is -S-(CH2)p-S or -S-(CH2)2-[O-(CH2)2]m-S~ R3 is C1- C18alkyl, benzyl, allyl; m is 1 or 2; and p is a number from 2 to 12; are suitable as a stabiliser for an elastomer to prevent oxidative, thermal, dynamic, light-induced and/or ozone~induced degradation. They are also suitable as stabilizers for elastomers to prevent contact discoloration of substrates coming into contact with elastomers.
Composés correspondant à la formule (I) dans laquelle R¿1? est alkyle C¿1?-C¿18?, cycloalkyle C¿5?-C¿12?, phényle, benzyle ou allyle; n est 1 ou 2; si n est 1, R¿2? est alkyle C¿4?-C¿18?, cycloalkyle C¿5?-C¿12?, aryle ou hétéroaryle, benzyle, allyle, (CH¿2?),¿m?COOR¿3? ou est (CH¿2?)¿m?CN; si n est 2, R¿2? est -S-(CH¿2?)¿p?-S or -S-(CH¿2?)¿2?-[O-(CH¿2?)¿2?]¿m?-S- R¿3? est alkyle C¿1?-C¿18?, benzyle ou allyle; m est 1 ou 2; et p est un nombre entre 2 et 12. Ils conviennent en tant que stabilisateurs pour un élastomère afin d'empêcher la dégradation oxydative, thermique, dynamique, causée par la lumière et/ou par l'ozone. Ils conviennent aussi en tant que stabilisateurs pour élastomères pour empêcher la décoloration des substrats en contact avec les élastomères.
Knobloch Gerrit
Meier Hans-Rudolf
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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