4 results about "Tertiary amine" patented technology

The invention discloses a preparation method of polyarylether containing quaternary ammonium side groups, comprising the following steps: a) adding bisphenol containing tertiary amine side groups, a halogenated organism monomer or nitrated organism monomer, a catalyst and a solvent, thus obtaining mixed solution; b) obtaining polyarylether containing tertiary amine side groups by polymerization reaction of the mixed solution obtained from the step a) at temperature of 30-180 DEG C; and c) adding halogenated hydrocarbon in the polyarylether containing tertiary amine side groups, and stirring at temperature of 0-100 DEG C, thus obtaining the polyarylether containing quaternary ammonium side groups. The invention also discloses a polyarylether containing quaternary ammonium side groups, and the sites and the number of the quaternary ammonium side groups are controllable. Compared with the prior art, the materials used in the invention is bisphenol containing tertiary amine side groups, no additional tertiary amine side groups or quaternary ammonium side groups are introduced in the generation process of the polyarylether containing quaternary ammonium side groups, so that the sites and the number of the quaternary ammonium side groups in the polyarylether are controllable, in addition, the conversion rate is complete and the laboratory yield is higher than 95%.

The invention discloses amphoteric polyurethane. Firstly, diisocyanate, hydroxyl-terminated polymer, a cation chain extender and a catalyst are mixed to be uniform, terminated isocyanate group polyurethane prepolymer containing tertiary amine is prepared through a prepolymerization reaction, after that, aromatic compound micromolecules containing hydroxyl-terminated and sulfonyl are taken as an anion chain extender, and amphoteric polyurethane containing tertiary amine and sulfonyl simultaneous is prepared and obtained through an end capping reaction. The invention further discloses the application of amphoteric polyurethane serving as a retanning agent for reducing free formaldehyde in leather, a neutralizing agent and water are added into amphoteric polyurethane to prepare amphoteric polyurethane emulsion which can serve as the retanning agent rightly. The retanning agent can enable the removal rate of free formaldehyde in leather to reach 80% or above when being used in the retanning process of leather.

The invention belongs to the field of water environment treatment, and particularly relates to a preparation method and application of a hydroxyethyl cellulose modified scale inhibitor capable of effectively inhibiting silicon dioxide scale bodies in a green and efficient manner. The green modified cellulose scale inhibitor is prepared by taking hydroxyethyl cellulose as a raw material, ammonium persulfate as an initiator and N-(3-dimethylaminopropyl) methacrylamide as a grafting monomer through a grafting reaction. According to the method, a grafting chain containing an amide group and a tertiary amine group can be introduced to a cellulose molecular chain, so that scale forming substances can be effectively dispersed, and the efficient environment-friendly scale inhibitor is obtained. The scale inhibitor prepared by the invention can effectively inhibit the generation of scale bodies and prevent the size of the scale bodies from being increased; when the scale inhibitor is applied to a reverse osmosis system, the reduction of membrane flux is effectively relieved, and the membrane has a good application prospect in controlling silicon dioxide scaling on the surface of the reverse osmosis membrane.