摘要:
Disclosed are flame-retardant compositions comprising a) a compound comprising a N-oxyamine group, and b) a compound of formulae (II), (III) or (IV)
wherein R1 and R2 independently from one another are hydrogen, C1-C6-alkyl, -P(O)(OR5)2, -P(O)OR5R6, -P(O)(R5)2, where R5 and R6 independently of one another are C1-C4-alkyl, C6-C12-aryl, C7-C15-aralkyl or C7-C15-alkaryl, or R1 and R2 taken together form an unsaturated cyclic ring, which is optionally substituted by an alkyl group; k is an integer from 1 to 2, Y is O or S, X is C1-C4-alkylene, C6-C12-arylene, C7-C15-aralkylene or C7-C15-alkarylene and n is 0, 1 or 2, or X is -O- or -NR7-, and n is 1, R7 is hydrogen or C1-C4-alkyl, R3 is C1-C4-alkylene, C6-C12-arylene, C7-C15-aralkylene or C7-C15-alkarylene, m is 0, 1 or 2, with the proviso that when X is -O- or -NR7- m is 1 or 2, R4 is C1-C4-alkylene, t is an integer from 1 to 2, and W is oxygen or sulphur.
The compositions can be used as flame-retardants in polymer compositions which exhibit improved flame-retardancy.
摘要:
The invention relates to novel and improved halogen-free flame retardant compounds having the structure of Formula I: wherein: R 1 and R 2 are independently hydrogen, C 1 -C 6 alkyl, -P(O)(OR 3 ) 2 , -P(O)OR 3 R 4 , or -P(O)R 3 2 , wherein R 3 and R 4 are independently C 1 -C 4 alkyl, C 6 -C 12 aryl, C 7 -C 15 aralkyl or C 7 -C 15 alkaryl; or R 1 and R 2 taken together form an unsaturated cyclic ring, which is optionally substituted by an alkyl group; each k is independently an integer from 1 to 2; each X is independently oxygen (O) or sulphur (S); v is 0 or 1; each Y is independently C 1 -C 4 alkylene, C 6 arylene, C 7 -C 15 aralkylene, C 7 -C 15 alkarylene, oxygen (O), nitrogen (NR), wherein R is H or C 1 -C 4 alkyl; n is 0, 1 or 2 with the proviso that n is 1 when Y is oxygen (O) or nitrogen (NR); each Z is independently C 1 -C 4 alkylene, C 6 arylene, C 7 -C 15 aralkylene or C 7 -C 15 alkarylene; m is independently 0, 1 or 2; with the proviso that when Y is oxygen (O) or nitrogen (N), m cannot be 0; each Q is independently C 1 -C 4 alkylene; t is an integer from 1 to 2; W is oxygen (O) or sulphur (S). The compounds are particularly suited as flame retardant additives for thermoplastic polyesters.
摘要:
The invention relates to compounds of the group of so-called sterically hindered amines (HALS) which are substituted by phospho groups. The invention also relates to flame retardant compositions wherein these compounds are added to the polymer substrate.
摘要:
Poly(Pentaerythrityl diphosphonate) of formula (I):
wherein n is an integer having a value comprised within the range of from 3 to 100. The poly(pentaerythrityl diphosphonate) of formula (I) is useful as a flame retardant additive for thermoplastic polymers.
摘要:
Es werden neue oligomere Verbindungen der Formel I
worin L eine Gruppe der Formel
bedeutet, wobei der Sauerstoff in der Gruppe L jeweils an den Phosphor in der wiederkehrenden Struktureinheit und der Rest R₅ beziehungsweise der Kohlenstoff in 4-Stellung des Piperidinylrings in der Gruppe L jeweils an den Sauerstoff in der wiederkehrenden Struktureinheit gebunden ist; und die allgemeinen Symbole wie in Anspruch 1 definiert sind, als Stabilisatoren für organische Materialien gegen oxidativen, thermischen oder lichtinduzierten Abbau beschrieben.