摘要:
The subject of the invention is the compounds of formula: ##STR1## in which R denotes a saturated or unsaturated, linear or branched alkyl group containing from 5 to 21 carbon atoms. The invention also relates to a process for the preparation of the abovementioned compounds, characterized in that it consists in a) forming an N-acylglucosamine from glucosamine hydrochloride and C.sub.6 -C.sub.22 acid chloride, and b) reacting the compound from stage a) with glycerol in the presence of an acid catalyst. It also relates to detergent or cosmetic compositions including the abovementioned compounds.
摘要:
A regimen for inducing/stimulating hair growth and/or retarding hair loss on an individual in need of such treatment comprises topically applying to the affected hair and/or scalp of such individual, a hair growth stimulating and/or hair loss retarding effective amount of at least one 2,3-dihydroxypropyl-2-(1-oxohydrocarbyl) amino-2-deoxyglucopyranoside having the structural formula: ##STR1## in which R is a linear or branched, saturated or unsaturated hydrocarbon radical having from 5 to 21 carbon atoms.
摘要:
The invention relates to compounds of formula: ##STR1## The invention also relates to a process for the preparation of the said compounds, which consists in: a) reacting dianhydro-1,4:3,6-D-glucitol with a compound of formula RCOOR' or RCH.sub.2 Y in the presence of a catalyst to form compounds of formula: ##STR2## in which: Y represents a halogen or an alkyl or arylsulfonic radical, R' represents a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms, R represents a saturated or unsaturated linear or branched alkyl radical containing from 5 to 21 carbon atoms, x represents CO or CH.sub.2 ; b) reacting the product of step a) with phosphorus oxychloride, a base and an anhydrous solvent, to form the compounds of formula (I) and/or (II), and optionally in separating them. The compounds which form the subject of the invention can be used in the field of surfactants, in particular for the preparation of cosmetic or hair compositions.
摘要:
The invention relates to fluoroalkyl derivatives of uronic acids of the formula: ##STR1## and the corresponding lactones, as well as a process for the preparation of the said compounds, which comprises reacting a glycosiduronic acid or a glycosiduronolactone with an alcohol of formula R.sub.1 OH, which process may also include steps of basiciation and acidification. The compounds according to the invention may be used in particular as surfactants.
摘要:
In a method of continuous fabrication of mother-capacitors, a mother-film of substantial width is first metallized and cut so as to form intermediate films. A border is then formed on each intermediate film by means of a YAG-laser beam. Each intermediate film is then cut so as to form individual films by means of a CO.sub.2 -laser beam, the beam spot being located in proximity to the YAG-laser beam spot on the intermediate film. After relative displacement of the individual films, they are wound on a wheel of substantial width so as to form an array of n mother-capacitors. A single intercalary element is placed between two tiers of an assembly of m mother-capacitors, thus endowing the assembly with good stability. The two outer rings of mother-capacitors are finally cut-out after spray-coating.
摘要:
The invention relates to methods for preventing the attachment of aquatic organisms to surfaces that are submerged for extension periods of time in water. More particularly, this invention relates to the protection of submerged surfaces with alkylamine derivatives as antifouling agents. The invention is beneficiary for the environment in that it will permit the use of copper- and tin-free paints.
摘要:
An unwinding machine (10) with forming cylinders (11, 12, 13) has bearing blocks (26, 27) in which the forming cylinders (11, 12, 13) are supported. The bearing blocks (26, 27) are disposed in recesses (32) of partition walls (25, 25a) of the unwinding machine (10) and are secured by means of clamping devices (35). Furthermore, the forming cylinders (11, 12, 13) are coupled to a common drive motor (15). The unwinding machine (10) according to the invention permits a simple exchanging of the forming cylinders (11, 12, 13).
摘要:
The invention relates to a process for the phosphatization of metallic substrates comprising the use of a phosphatization bath having a pH from 1 to 5.5 and which comprises from about 0.3 to about 25 g/l of zinc ion, preferably from 0.5 to 10 g/l, from 5 to about 50 g/l of phosphate ion, preferably from 8 to 30 g/l, and from about 0.01 to about 10 g/l, preferably from 0.03 to 3 g/l of a trivalent cobalt complex.
摘要:
A metalized film for constructing capacitors formed from a flexible dielectric support medium comprising on at least one of its faces metalized parallel strips partially covered by lacquer strips parallel to the preceding ones, two successive metalized strips being partially covered by a lacquer strip whereas two successive lacquer strips partially cover the same metalized strip.