摘要:
Process and use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid.
摘要:
Glycerol derivatives of general formula (I) ##STR1## in which R=allyl, methylallyl, acryloyl or methacryloyl, R.sub.1 =R.sub.2 =glyoxyloyl, R.sub.1, R.sub.2 =H, glyoxyloyl; their preparation process, their use as cross-linking agnets and cross-linking or cross-linkable compositions containing them. These compounds are useful as crosslinking agents for woven and non-woven fibrous mats and textiles.
摘要:
The invention concerns new polyfunctional ethylenic monomers of the general formula (I): ##STR1## where R=cyano, substituted or unsubstituted acyl, substituted or unsubstituted alkoxycarbonyl or substituted or unsubstituted aryloxycarbonyl; R.sub.1 and R.sub.2 each represent --CHR.sub.3 R.sub.4 where R.sub.3 and R.sub.4 may be identical or different and represent H or an alkyl, alkenyl or aralkyl group. R.sub.1 and R.sub.2 may, alternatively, together form a radical --CH.sub.2 --(CR.sub.5 R.sub.6).sub.n --CHR.sub.7 where n=0 or 1 and R.sub.5, R.sub.6 and R.sub.7 may be identical or different and represent H or CH.sub.3.Particular monomers are: 2-cyano-4,4-dimethoxy-3-hydroxy-1-butene; 2-cyano-4,4-dibutoxy-3-hydroxy-1-butene; 4,4-dibutoxy-2-ethoxycarbonyl-3-hydroxy-1-butene; 2-butoxycarbonyl-4,4-dibutoxy-3-hydroxy-1-butene; 4,4-dimethoxy-2-hydroxythoxycarbonyl-1-butene; 4,4-dimethoxy-2-dimethylaminoethoxycarbonyl -3-hydroxy-1-butene; and 4,4-dimethoxy-2-ethoxycarbonyl-3-hydroxy-1-butene.
摘要翻译:本发明涉及通式(I)的新的多官能乙烯单体:其中R =氰基,取代或未取代的酰基,取代或未取代的烷氧基羰基或取代或未取代的芳氧基羰基; R 1和R 2各自表示-CHR 3 R 4,其中R 3和R 4可以相同或不同,表示H或烷基,烯基或芳烷基。 R 1和R 2可以一起形成基团-CH 2 - (CR 5 R 6)n -CHR 7,其中n = 0或1,并且R 5,R 6和R 7可以相同或不同,表示H或CH 3。 特别的单体是:2-氰基-4,4-二甲氧基-3-羟基-1-丁烯; 2-氰基-4,4-二丁氧基-3-羟基-1-丁烯; 4,4-二丁氧基-2-乙氧基羰基-3-羟基-1-丁烯; 2-丁氧基羰基-4,4-二丁氧基-3-羟基-1-丁烯; 4,4-二甲氧基-2-羟基乙氧基羰基-1-丁烯; 4,4-二甲氧基-2-二甲基氨基乙氧基羰基-3-羟基-1-丁烯; 和4,4-二甲氧基-2-乙氧基羰基-3-羟基-1-丁烯。
摘要:
They have the formula: ##STR1## where either R.sub.1 and R.sub.2 are identical and represent --CH.sub.2 R where R=H or a C.sub.1 to C.sub.4 alkyl group or R.sub.1 and R.sub.2 together form the --CH.sub.2 (CR.sub.4 R.sub.4).sub.n --CH.sub.2 group where n=0 or 1, R.sub.4 =H or --CH.sub.3, R.sub.3 =H or --CH.sub.2 R.sub.5 where R.sub.5 =H or a C.sub.1 to C.sub.4 alkyl group. A and A.sub.1 are either identical and represent H or A and A.sub.1 together form an ethylene, trimethylene or --CH(OCH.sub.2 R.sub.6)--CH(OCH.sub.2 R.sub.6)-- radical where R.sub.6 =H or a C.sub.1 to C.sub.4 alkyl group or, when R.sub.3 =H, a 1,2 dihydroxy-ethylene group.They are obtained by reacting a disubstituted ethanal ##STR2## with a urea ANH--CO--NHA, followed if required by etherification with an alcohol R.sub.5 CH.sub.2 OH.
摘要:
Novel perhydro-[2,3-c]-oxazolo-1,4-oxazines, having the general formula (I): ##STR1## in which R represents a hydrogen atom or a C.sub.1 -C.sub.5 -alkyl radical, and the process for preparation thereof comprising reacting at a temperature lower than 30.degree. C. one mole of glyoxal with one mole of diethanolamine having the general formula (II): ##STR2## in which R has the same meaning as above.