Abstract:
What is provided herein is a vapor phase process for the production of butyrolactone in which the vapor mixture of the feed compound and hydrogen is provided at high flow rates from finely divided droplets of the feed compound which are vaporized rapidly with hot hydrogen gas.
Abstract:
An uncrosslinked, water-soluble polyvinylpyrrolidone having a K-value in excess of 120 and containing less than about 0.1 percent by weight of residual monomer. A method for preparing the high molecular weight polyvinylpyrrolidone is also disclosed.
Abstract:
Alkenyl ether carbonates having formula (A) wherein A is RHC=CHO(B)n-, lower alkyl or a mixture thereof; B is (a) divalent radical having from 2 to 12 carbon atoms and is selected from the group of alkylene, mono or polyalkoxylated alkylene, alkenylene, alkynylene, arylene, alkarylene and aralkylene radicals, which radicals are optionally substituted with halo, alkyl, cyano, nitro or alkoxy; R is hydrogen or lower alkyl and n is from 1 to 10. These are provided alkenyl ether polycarbonate, a polymerizable compound formed from reaction of a dialkenyl ether monocarbonate and a polyhydroxy alcohol having at least three hydroxy groups, a polymerizable compound formed from the reaction of a hydroxylated polymeric polyether, polyurethane, polycarbonate, polyester of an alkanedioic acid or polybutadiene and a dialkenyloxy carbonate co-reactant, and polyaryloxypolyvinyl ethers. The polymerized compounds are intermediates for hard abrasion resistant films and coatings. The monomers and oligomers are intermediates for hydrogels or photoresist materials.
Abstract:
La présente invention a pour objet l'utilisation cosmétique d'une composition comprenant, en tant qu'agent actif, entre 0,1 et 1 µM d'un peptide de synthèse de séquence His-D-Trp-Ala-Trp-D-Phe-Lys-NH2 ou un de ses sels dans un milieu physiologiquement adapté, pour diminuer ou retarder l'apparition de la sénescence cellulaire et des signes du vieillissement cutané. La présente invention a également pour objet une méthode de traitement cosmétique se rapportant à ces nouvelles utilisations, comprenant les étapes d'application de la composition, par voie topique, au moins une fois par jour, pendant une durée d'au moins 2 jours.
Abstract:
Optical imaging systems and methods are disclosed herein for investigating and analyzing one or more characteristics of a spray, including spray front velocity, spray sheet length, spray break-up dynamics, drift potential, and drop-size distribution. Optical imaging systems disclosed herein include an image acquisition device, one or more illumination source, a processor for processing and analyzing image data, a background, and a spray system that includes at least a nozzle. The image acquisition device and illumination sources are positioned on the same side of the spray. The processor has a first algorithm to generate a feedback correction factor and a second algorithm to identify droplets and develop a drop-size distribution for the spray. Optical imaging methods for determining spray characteristics are also disclosed and generally include the steps of providing an imaging system, capturing images of the spray with the imaging system, processing the images, and analyzing the images.
Abstract:
The invention provides polymers comprising repeating units derived from (a) from 16 % by weight to about 35 % by weight of said polymer of at least one N - vinyl lactam monomer; (b) at least one monomer selected from the group consisting of functionalized and unfunctionalized C 1 -C 6 alkyl (meth)acrylates, C 1 -C 6 alkyl (meth)acrylamides and combinations thereof; and (c) at least one monomer selected from the group consisting of functionalized and unfunctionalized C 8 -C 30 branched alkyl (meth)acrylates, C 8 -C 30 branched alkyl (meth)acrylamides, and combinations thereof; wherein the polymer has a glass transition temperature of greater than about 45°C. The invention further provides various compositions, such as, personal care, sun care, coatings, and pharmaceutical compositions comprising the polymers described herein. The invention furthermore provides water-resistant sun care compositions comprising the polymers described herein. Subscripts x, y and z are described herein. (Formula (I))
Abstract:
La présente invention se situe dans le domaine de la cosmétique et plus particulièrement dans le domaine des soins cosmétiques de protection de la peau. L'invention concerne l'utilisation cosmétique d'un extrait d' Artémia salina pour protéger la peau des agressions dues aux stress thermiques, en particulier aux stress thermiques froids ou aux variations de température répétées. L'invention a également pour objet une méthode de soin cosmétique comprenant l'application topique, sur au moins une partie de la peau du corps ou du visage, d'un extrait de d' Artémia salina , dans une composition comprenant un milieu physiologiquement acceptable, pour obtenir un effet protecteur, et plus particulièrement pour protéger la peau des agressions dues aux stress thermiques.
Abstract:
The present invention provides a method for measuring a two-dimensional distribution of ionizing radiation doses with high spatial resolution. The method comprises exposing radiation sensitive film to a pattern of ionizing radiation to form a measurement film, exposing areas of radiation sensitive film to a plurality of known doses of the ionizing radiation to form a calibration film(s), scanning all the exposed films together with an unexposed radiation sensitive film at a single time to produce a digital image, measuring those areas of the digital image corresponding to the unexposed film and the calibration film(s) exposed to different known doses, associating the measured responses in the areas to the known doses and using the association to convert the values in the scanned image corresponding to the measurement film from scanner response values to dose values. In a preferred embodiment, all of the radiation sensitive films are the same type of film.
Abstract:
The present invention provides coating composition for forming a toner receptive coating on a substrate containing a polymer comprising: (a) a N-vinyl amide monomer, (b) a vinyl acetate monomer, (c) a substituted or unsubstituted monomer comprising a cyclic ether, and (d) a solvent. The coating compositions may further comprise a (e) non-reactive hydrophobic monomer. The invention also provides substrates coated with the toner receptive coatings.