| 摘要 |
<p>Stabilisers for polyolefins These have the formula (where R1-4 = H, C1-C18 alkyl or aryl; X = C=O, -C-C-C-A-C- where A is C1-C16 alkylene or aryl, -S-, or R-C-R where R = H, C1-18 alkyl, aryl or their mixture Y is -P-OR, =P(=O)OR, =P-R or =P(=O)R (where R is H, 1-18C alkyl or aryl) =B-OR; CO, -CO-(CH2)m-CO, -CO-A'-CO- (where m is 2-10; A' is -(CH2)x-S-(CH2)x - or -(CH2)x -S-(CH2)y -S-(CH2)x - and x is 0-10 and y is 0-10); = Si(R5)2 or -Si(R5)2-O-Si(R5)2- where R is alkyl; n is 1-15 except when Y = -P-OR when n is 2-15; Z stands for the formula inside the bracket with Y = H, when n = 1-15 or can be derived from the cpd. used to introduce Y when n = 2-15).</p> |
