| 摘要 |
<p>The title cpds. contain at least one stabiliser out of the group (a) thiodiphenylamine, (b) a mixture of beta-diketone and an org. acid (c) alkylsubstd. hydroquinone (d) 2,4,6-trialkoxy-1,3,5-triazine and (e) sterically hindered phenolic cpds. Pref. the beta-diketone has formula R' -CH2- -R2 where R1 and R2 are the same or diff. and are each an aliph. alicyclic, or aromatic hydrocarbon gp. OH, alkoxy, aryloxy, aralkoxy, alkoxyalkyl, aryloxyalkyl, aralkoxyalkyl or trichalomethyl gp. The org. acid is one of the gp. oxyacids, sulphanilic acids, carboxylic acids, and sulphosalicylic acid. The hydroquinone has the formula where R1,R2,R3 and R4 are each II or alkyl gps. such that at least 2 gps. are alkyl gps.</p> |
