| abstract |
Compounds of the formulaewherein, provided that at least one of R1, R2, and R3 is not a hydrogen atom, R1, R2 and R3 each, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein R1 and R2 can also be alkoxy, aryloxy, arylalkyloxy, alkylaryloxy, polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silyl, siloxane, polysilylene, polysiloxane, or a group of the formulawherein r and s are integers representing a number of repeat -CH2- groups, and wherein X is a direct bond, oxygen, sulfur, -NR40- wherein R40 is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, or -CR50R60- wherein R50 and R60 each, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and R10 and R11 each, independently of the other, is alkylene, arylene, arylalkylene, or alkylarylene, and wherein R10 can also be polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silylene, siloxane, polysilylene, or polysiloxane. |