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Examples of R radicals are alkyl radicals, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, such as n-hexyl, heptyl, such as n-heptyl, octyl, such as n-octyl and isooctyl, such as 2,2,4-trimethylpentyl, nonyl, such as n-nonyl, decyl, such as n-decyl, dodecyl, such as n-dodecyl, and octadecyl, such as n-octadecyl, cycloalkyl, such as cyclopentyl, cyclohexyl, cycloheptyl and methylcyclohexyl, aryl, such as phenyl, naphthyl, anthryl and phenanthryl, alkaryl, such as o-, m-, p-tolyl, xylyl and ethylphenyl, and aralkyl, such as benzyl, a-phenylethyl and ~-phenylethyl. 

Examples of substituted R radicals are haloalkyl, such as 3,3,3-trifluoro-n-propyl, 2,2,2,2’,2’,2’-hexafluoroisopropyl, heptafluoroisopropyl and haloaryl, such as o-, m- and p-chlorophenyl. 

R is preferably methyl. 

Examples of R 1 radicals are alkyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, such as n-hexyl, heptyl, such as n-heptyl, octyl, such as n-octyl and isooctyl, such as 2,2,4-trimethylpentyl. 

R $^{2 }$is preferably an organic radical selected from the group 

<img src='content_image/921931.jpg'>

<img src='content_image/921932.jpg'>

and 

a divalent hydrocarbon radical having 1 to 10 carbon atoms per radical, 

where (Si)- is the bond to the silicon atom of the siloxane unit of the formula (IV) or (V) as the case may be 50 and ----(N) is the bond to the nitrogen atom of the structural unit Y or Y’ of the formula (I) or (I’) as the case may be, 

R 5 is a divalent hydrocarbon radical having 1 to 10 carbon atoms per molecule which may be substituted by an ether 55 oxygen atom, 

R $^{6 }$is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 10 carbon atoms per radical which may be substituted by an ether oxygen atom, 

R 7 is a trivalent hydrocarbon radical having 3 to 12 carbon atoms per radical and t is O or 1. 

Examples of R 2 radicals are aliphatic, cycloaliphatic and aromatics-containing divalent organic radicals which con- tain hydroxyl functions from the epoxide ring opening such as 

(VI), 

(VII) 

<img src='content_image/921949.jpg'>

<img src='content_image/921948.jpg'>

<img src='content_image/921947.jpg'>

<img src='content_image/921946.jpg'>

<img src='content_image/921945.jpg'>

<img src='content_image/921944.jpg'>

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<img src='content_image/921942.jpg'>

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where r is an integer from 1 to 20 and preferably from 2 to 8, and ----(N) is the bond to the nitrogen atom of the structural unit Y of the formula (I) 

and alkylene radicals, such as 

<img src='content_image/921939.jpg'>

<img src='content_image/921938.jpg'>

<img src='content_image/921937.jpg'>

<img src='content_image/921936.jpg'>

<img src='content_image/921935.jpg'>

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<img src='content_image/921933.jpg'>

