74 results about "Xylidine" patented technology

Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.

Provided is a xylylenesebacamide resin molding which is excellent in mechanical strength such as elastic modulus and avoids the problem of mechanical strength loss during long-term use. This is a molding of a polyamide resin or a polyamide resin composition containing the polyamide resin, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), and the molding has a crystallinity index of 0 to 50% and a moisture content of 0.1 to 2% by mass.

The invention discloses a method for synthesizing 3,3',4,4'-benzophenonetetracarboxylic dianhydride by taking o-xylene and bis(trichloromethyl) carbonate as raw materials. The method comprises the steps of: by taking o-xylene and bis(trichloromethyl) carbonate as the raw materials, performing acylation reaction in catalysis of anhydrous lewis acid, thus obtaining bis(3,4-ditolyl)methanone; fully oxidizing bis(3,4-ditolyl)methanone in a potassium permanganate / hydrochloric acid system, and carrying out filtration, concentration, crystallization and the like to obtain 3,3',4,4'-benzophenonetetracarboxylic acid; performing vacuum high-temperature melting and dehydration to 3,3',4,4'-benzophenonetetracarboxylic acid to obtain the 3,3',4,4'-benzophenonetetracarboxylic dianhydride product. The preparation method has the advantages of being simple in technology, high in yield, fewer in three wastes, capable of recycling anhydrous lewis acid, low in production cost and easy for industrial implementation, and the like.

The invention relates to a method for measuring the optical purity of R-alogliptin benzoate. The method is characterized in that a chromatographic system is a high performance liquid chromatograph; a chromatographic column filler is amylose-tris(3,5-dimethylphenyl carbamate); the flow velocity is 0.8 ml / min; the column temperature is 25 DEG C; the measurement wavelength is 278 nm; the sample introduction amount is 20 [mu]l; the chromatographic mobile phases are n-hexane and an ethanol solution which contains 0.2% trifluoroacetic acid and 0.1% diethyl amine; the ratio of n-hexane to the ethanol solution is 80:20; sample introduction is conducted on an R,S-alogliptin benzoate reference solution and an S-alogliptin benzoate reference solution respectively for system suitability analysis at first, and then the optical purity of an R-alogliptin benzoate test solution is measured and the optical purity of an R-alogliptin benzoate sample is calculated according to an area normalization method.

The invention relates to a novel xylidine and acetic acid waste gas recovery device and method. The recovery device comprises a condensation type recovery device and an adsorption-type recovery device; the condensation type recovery device comprises a primary condenser and a secondary condenser which are communicated in sequence; the lower end of the secondary condenser is provided with a condensate recovery tank; the adsorption-type recovery device comprises an absorption tower and an activated carbon tank which are communicated in sequence; in a condensing period, a pre-condensation plus secondary condensation method is adopted, and meanwhile frosting of a condensation device are reduced and prevented as much as possible; xylidine and acetic acid mixed gas which is condensed and not recovered is subjected to cyclic spray settling by a tail gas absorber, and the gas running away to the upper part is subjected to adsorption treatment by the activated carbon tank. The novel xylidine and acetic acid waste gas recovery device and method have the advantages that the recovery utilization rate or organic matters such as acetic acid and xylidine is up to 99 percent or higher, activated carbon regeneration is thorough, the reuse rate is high, the service life is long, the operation cost is low, energy is saved, a process is simplified, and steam regeneration is not adopted.

A single-layer hollow container includes: a resin composition that is formed of 60 to 90% by mass of polyolefin, 2 to 35% by mass of meta-xylylene group-containing polyamides, and 5 to 30% by mass of modified polyolefin. The meta-xylylene group-containing polyamides are dispersed insularly in the polyolefin, and in a case where each of a vertical length and a horizontal length of the meta-xylylene group-containing polyamide in an initial state is 1, the vertical length of the meta-xylylene group-containing polyamide in the hollow container ranges from 3.3 to 15.8 and the horizontal length ranges from 0.5 to 2.0.

Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured polyp-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.

The invention provides a method for separating and purifying edoxaban by chromatography. The separation method is chromatography, and the chromatographic conditions are as follows: the filler is an amylose-tri(3,5-xylylcarbamate) bonded silica gel, and the mobile phase is selected from a mixed solution comprising a non-polar solvent and a polar solvent. By selecting the chromatographic conditions, the edoxaban and seven enantiomers and nonenantiomers thereof can be simultaneously separated, and thus, the method has the characteristics of high speed, high simpleness, high efficiency and the like.

The disclosure herein provides a compound of formula 1. The disclosure also provides a method of synthesizing the compound of formula 1. The compound of formula 1 or its pharmaceutical acceptable salts, as well as polymorphs, solvates, and hydrates thereof may be formulated as pharmaceutical composition. The pharmaceutical composition of compound of formula 1 or the final compound may be formulated for non-invasive peroral, topical (example transdermal), enteral, transmucosal, targeted delivery, sustained release delivery, delayed release, pulsed release and parenteral methods. Such compositions may be used to treat chronic pain manifested with chronic diseases or its associated complications. The compound may also be offered as a kit.