44 results about "Terephthaloyl dichloride" patented technology

The present invention relates to a copolymerized aramid dope-dyed yarn and a method for preparing the same. When a copolymerized aramid yarn is prepared by adding terephthaloyl dichloride to an organic solvent in which an aromatic diamine having a cyano group is dissolved, followed by a reaction, to polymerize a polymerization solution containing a copolymerized aramid polymer, and then spinning and solidifying the polymerization solution, a copolymerized aramid dope-dyed yarn is prepared by adding a dye having a cation during the polymerization process of the polymerization solution containing the copolymerized aramid polymer. Deterioration in the polymerization degree of the copolymerized aramid polymer or deterioration in the dissolubility of the polymerization solution due to the addition of the dye to the polymerization solution can be effectively prevented. Further, according to the copolymerized aramid dope-dyed yarn and the method, when a copolymerized aramid polymer having a cyano(-CN) group and a dye having a cation are bonded by a hydrogen bond to form a liquid crystal during the polymerization process of the polymerization solution containing the copolymerized aramid polymer, the behavior together with a main chain of the copolymerized aramid polymer is possible, thereby enhancing the color strength, color fastness to light, and color fastness to washing of the copolymerized aramid doped-dyed yarn.

The invention relates to a biacid monomer containing benzoxazinone radical groups and a polyester copolymer thereof. The biacid monomer containing the benzoxazinone radical groups is obtained by means of reaction of 2-aminaterephthalic acid and terephthaloyl dichloride or teranaphthyl dichloride; the polyester copolymer is formed by polycondensating terephthalic acid or dimethyl terephthalate, ethylene glycol and biacid monomer containing benzoxazinone radical groups, and the molar ratio of the three monomers is 100:(10 to 90):(1 to 99). The biacid monomer has the advantages that the biacid monomer containing the benzoxazinone radical groups is connected to a polyester main chain by virtue of a copolymerization method, so that the polyester is good in ultraviolet stability and excellent in mechanical performance, and the weakness of the polyester in the prior art that after a large content of ultraviolet absorbent (the weight percent is more than 5 percent) is added, the mechanical performance is decreased can be overcome.

A poly(amide-imide) copolymer film having a tensile modulus of greater than or equal to 5.4 GPa, and a yellowness index of less than or equal to 3.6, wherein the poly(amide-imide) copolymer film is a reaction product of an aromatic dianhydride including biphenyl tetracarboxylic dianhydride and 4,4′-hexafluoroisopropylidene diphthalic dianhydride, an aliphatic dianhydride including 1,2,3,4-cyclobutane tetracarboxylic dianhydride, an aromatic diamine including 2,2-bis(trifluoromethyl) benzidine, and an aromatic dicarbonyl compound including terephthaloyl dichloride.

The present invention relates to a method of forming polymer crumbs comprising 2-(4-aminophenyl)-5(6)-aminophenylbenzimidazole (DAPBI), p-phenylenediamine (PPD) and the residue of terephthaloyl dichloride (TCl), the method comprising the steps of: i) forming a slurry of b mole % DAPBI in a solvent system comprising an organic solvent and c weight % of an inorganic salt , wherein the inorganic salt is present in an amount of at least 5% by weight of the organic solvent; ii) contacting the slurry with a substoichiometric amount of terephthaloyl chloride to form a prepolymer solution; and iii) making The prepolymer solution is contacted with y mole % of PPD and additional TCL to form a polymer solution; wherein the total amount of TCL added in steps ii) and iii) is equal to the amount of DAPBI added in steps i) and iii) and A stoichiometric amount based on the total amount of PPD; the DAPBI and PPD are added in an amount sufficient to provide a polymer-based polymer solution having a weight percent solids of 12% or greater; and wherein the sum of y+b is 100 , and the product of b×c is 225 or greater.

The present invention concerns processes for reducing water in never-dried fiber comprising copolymer derived from the copolymerization of para-phenylenediamine, 5(6) -amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride, the process comprising the steps of: (a) heating the never-dried fiber to a temperature of at least 20° C. but less than 100 ° C. until the moisture content of the fiber is 20 weight percent or less of the fiber; and (b) further heating the fiber to a temperature of at least 350° C.

The present invention relates to yarns comprising copolymers derived from the copolymerization of p-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole and terephthaloyl dichloride, wherein The ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to moles of p-phenylenediamine is from 30 / 70 to 85 / 15. The yarn has a sulfur content of greater than 0.1%; and has an effective polymer cation to sulfur content molar ratio of at least 0.3. Additional aspects of the invention relate to methods of making such yarns.

The invention concerns processes for forming a polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino phenyl benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, comprising the steps of: a) forming a solution of DAPBI and paraphenylene diamine dihydrochloride in a solvent system comprising an organic solvent and an inorganic salt; b) cooling the solution to a temperature of 30 DEG C or less; c) adding a stoichiometric amount of terephthaloyl dichloride, relative to the total amount of the DAPBI and the paraphenylene diamine dihydrochloride, to the solution; and d) agitating the solution of step c) to form a polymer.

The invention concerns processes for forming a polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino phenyl benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride, comprising the steps of: (a) forming a slurry of DAPBI in a solvent system comprising an organic solvent and an inorganic salt; (b) adding less than a stoichiometric amount, relative to the amount of DAPBI, of terephthaloyl dichloride to the slurry; (c) agitating the slurry to react the DAPBI and terephthaloyl dichloride to form an oligomeric solution; (d) adding PPD to the oligomeric solution and agitating until essentially all of the PPD is dissolved, followed by the addition of terephthaloyl dichloride to form a prepolymer solution; and (e) allowing the prepolymer solution to form a polymer.

A process for preparation of block copolyestercarbonates which is implemented as follow: first conducting a reaction between at least one of resorcinol or an alkyl- or haloresorcinol and at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof, to produce a hydroxy-terminated polyester intermediate, and then conducting a reaction of the intermediate with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A. The products have excellent physical properties, including a high degree of weatherability. They may be blended with other polymers such as polycarbonates, poly(alkylene carboxylates), polyarylates, polyetherimides, and addition polymers to improve the weatherability thereof.

The present invention relates to a method of forming a polymer comprising 2-(4-aminophenyl)-5(6)aminobenzimidazole (DAPBI), p-phenylenediamine (PPD) and terephthaloyl diamine Chlorine residues, the method comprising the steps of: (a) forming a solution of an oligomer having an amine end group from two moles of DAPBI and one mole of terephthaloyl dichloride in a solvent system comprising organic solvent and inorganic salt; (b) adding PPD to the oligomer solution; and (c) adding additional terephthaloyl dichloride to form the polymer.

The present invention also relates to a method of forming a polymer comprising 2-(4-aminophenyl)-5(6)aminobenzimidazole (DAPBI), p-phenylenediamine and terephthaloyl dichloride residue, the method comprising: (a) forming a solution of an oligomer having a chloride end group from one mole of p-phenylenediamine and 1.3 to 5 moles of terephthaloyl dichloride in a solvent system, the solvent The system comprises an organic solvent and an inorganic salt; and (b) adding DAPBI and terephthaloyl dichloride to a solution of the oligomer to form a polymer.