6 results about "Xylidine" patented technology

The invention provides halogen-free flame-retardant polyurethane resin as well as a preparation method and application thereof, and the halogen-free flame-retardant polyurethane resin is prepared from the following raw materials in percentage by weight: 60-85% of a polyurethane matrix material system; 10 to 35% of phenyl phosphine oxide; 3-10% of a flame retardant synergist; wherein the phenyl phosphine oxide is selected from at least one of triphenyl phosphine oxide or p-xylyl bis (diphenyl) phosphinic oxide; the flame retardant synergist is selected from salts formed by nitrilotrimethylene triphosphonic acid and metal ions; the polyurethane leather prepared from the halogen-free flame-retardant anti-polyurethane resin disclosed by the invention is good in flame retardant property, good in hydrolysis resistance and good in mechanical property.

The invention discloses a polyurethane elastomer material with multi-stimulus response discoloration, high mechanical strength and self-healing characteristics as well as a preparation method and application thereof, in the structural formula of the polyurethane elastomer material, A is selected from substituted or unsubstituted phenyl, biphenyl, xylyl, naphthyl, cyclohexyl, butyl and hexyl, and B is selected from substituted or unsubstituted phenyl, biphenyl, xylyl, naphthyl, cyclohexyl, butyl and hexyl; the substituent groups are alkyl groups, alkoxy groups and halogen methyl groups of C4-C6; and B is polyether polyol. W is a positive integer ranging from 10 to 80, x is a positive integer ranging from 4 to 8, y is a positive integer ranging from 20 to 70, and z is a positive integer ranging from 20 to 90. According to the invention, adipic acid dihydrazide, 2, 2-bis (hydroxymethyl) propionic acid and rhodamine 6G ethylene glycol are used as chain extenders, and organic tin is used for catalytic polymerization to form the organic tin-based polymer. The material disclosed by the invention has the characteristic of color change response to external stress, ultraviolet irradiation and an acid environment, can be subjected to shape programming after being heated, and also has excellent mechanical strength and self-healing performance.

The invention discloses an ultrasonic coupling bag, an ultrasonic coupling agent and a preparation method of the ultrasonic coupling agent. The ultrasonic coupling agent comprises a first component and a second component, wherein the first component is prepared from the following raw materials in parts by weight: 90 to 110 parts of phenyl xylene ethane; 0.8 to 1.2 parts of 2, 5-diphenyl oxazole; 7 to 12 parts of polymethyl methacrylate; 90 to 110 parts of dichloromethane; 2 to 3 parts of Span; 90 to 110 parts of deionized water; the second component is prepared from poloxamer F188 and deionized water; wherein the mass ratio of the first component to the poloxamer F188 to the deionized water is (2 to 3) to 1 to (4 to 6).

The present invention aims to provide a compound having excellent solvent solubility and excellent heat resistance, thermal decomposition stability, thermal conductivity, and flame retardancy, and a curable resin composition containing the compound. A multifunctional vinyl resin represented by the following general formula (1A) or an epoxy resin represented by the following general formula (1B) is provided. In formula (1), R 1 ~R 6 each independently represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, X independently represents a structure represented by formula (2), a benzonitrile structure, a diphenylsulfonyl structure, a xylylene structure, or - (CH2) m -, m represents a number of 3 to 10, and n represents a number of 1 to 15. (1A) (1B) (2).

This invention relates to a novel method for preparing cresol from xylyl ether.

The present invention relates to a novel process for preparing cresol from ditolylether.