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1199results about "Pigment treatment with organosilicon compounds" patented technology

Method for chemically modifying inorganic filler with graphene oxide, product and application

The invention discloses a method for chemically modifying inorganic filler with graphene oxide and a product. The method comprises the following steps: performing surface hydroxylation treatment and silane coupling agent treatment on the inorganic filler; maintaining the pH of a graphene oxide solution at 5.8-6.0 with an MES buffer solution; sequentially adding EDC and NHS, and performing ultrasonic treatment for 1-3 hours; adding the treated inorganic filler, and performing an amidation reaction at room temperature; and after the reaction, filtering, washing and drying to obtain the graphene oxide modified inorganic filler. The invention also discloses a method for preparing an inorganic filler/epoxy resin composite by use of the product. The process flow of the method disclosed by the invention is simple and environmentally friendly; the GO is connected to the surface of the inorganic filler by a chemical modification process, and the firm covalent bond combination between the GO and inorganic particles is generated, so that the interface adhesiveness and mechanical strength between the inorganic filler and the polymer are enhanced, and a new idea is provided to the modification of an inorganic filler surface and the preparation of a high-performance composite.
Owner:UNIV OF JINAN

Organic surface modifying method of attapulgite

The invention relates to a modification method of the organic surface of attapulgite. The process steps are as follows: the attapulgite powder is added into deionized water according to certain proportion, so as to produce attapulgite suspendion liquid, and the attapulgite mass occupies 5 percent to 25 percent of the water mass; the temperature of the attapulgite suspendion liquid is adjusted to be 20 to 90 DEG C, cationic surface active agent is added, the cationic surface active agent quality is 2 to 10 percent of the attapulgite quality, and stirring and reaction are perfromed for 2 to 10 h; after the organic surface modification of the cationic surface active agent is accomplished, the pH value of the system is adjusted to be 3 to 3 or 8 to 11, silane coupling agent is added into the reaction system, the silane coupling agent mass occupies 5 to 20 percent of the attapulgite mass, and the the silane coupling agent is stirred and reacted for 3 to 24 h below 20 to 90 DEG C; the obtained attapulgite pulp is filtered, washed, dried and crushed, and finally the attapulgite powder modified through combing the cationic surface active agent with the silane coupling agent is obtained. Through the cationic surface active agent and the silane coupling agent to perform the organic surface modification to the attapulgite together, the organic surface modification effect is greatly improved.
Owner:JIANGSU NDZ TECH

Method for preparing hollow glass microsphere coating titanium dioxide

The invention discloses a method for preparing titanium dioxide for coating surfaces of hollow glass microspheres. The method comprises: washing the hollow glass microspheres with alkali liquor to remove impurities and etching to improve activity; performing surface activation and modification by using a silane coupling agent; mixing the activated hollow glass microspheres and distilled water in a mass ratio of 1:10; fully stirring at 40 to 90 DEG C; in the stirring process, dripping solution of titanium sulfate at a constant speed with in 2 to 6 hours according to a mass ratio of the hollow glass microspheres to the titanium sulfate of 1:0.8-1:1.6; slowly adding alkali liquor, keeping the pH value of the reaction system between 5 and 7, and stirring first at a speed of 400r/min for the first 1/5 of reaction time and then at a speed of 100 to 300r/min for the rest 4/5 of reaction time; and after the reaction is finished, standing, performing suction filtration, washing with distilled water, drying and calcining. The hollow glass microspheres coated with the titanium dioxide can serve as filler for reflective and thermal-insulation coating. Compared with common hollow glass microspheres, the hollow glass microspheres can be used for preparing and synthesizing high-performance coating combining various thermal-insulation mechanisms.
Owner:SHANGHAI UNIV

Organopolysiloxane combination for surface treatment, powder treated with the combination and cosmetic comprising the power

A combination for surface treating powder, composed of (I)organopolysiloxane or condensate thereof and (II)organopolysiloxane in a weight ratio of (I):(II) of from 95:5 to 5:95; (I)organopolysiloxane or condensate thereof and (III) acryl/silicone copolymer in a weight ratio of (I):(III) of from 95:5 to 5:95; or (I)organopolysiloxane or condensate thereof, (II)organopolysiloxane and (III) acryl/silicone copolymer in a weight ratio of (I):[(II)+(III)] of from 95:5 to 5:95, provided that each of (I), (II), and (III) may be packed together or separately, wherein (I)organopolysiloxane is represented by the following formula (1),
R1a(OR2)bSiO(4-a-b)/2  (1)
wherein R1 may be the same with or different from each other and is a C1-30 alkyl, aryl, aralkyl, fluorinated alkyl or amino-substituted alkyl group,
  • R2 is a C1-6 alkyl group, a is the number of from 0.75 to 1.5, and b is the number of from 0.2 to 3, provided that a sum of a and b is greater than 0.9 and at most 4; (II)organopolysiloxane is represented by the formula (2)
R3cR4dR5eSiO(4-c-d-e)/2  (2)
wherein R3may be the same with or different from each other and is a C1-30 alkyl, aryl, aralkyl, or fluorinated alkyl group,
  • R4 is a hydrogen atom, a hydroxyl group or a C1-6 alkoxy group and is bonded to the Si atom in the formula (2) via a group comprising carbon, oxygen, or silicon atom, and
  • R5 is a silicone compound residue represented by the following formula
  • wherein R3 is as defined above, c is the number of from 1.0 to 2.5, d is the number of from 0.001 to 1.5, and e is the number of from 0 to 1.5, x is an integer of from 1 to 5, and y is an integer of from 0 to 500; and (III) acryl/silicone copolymer has at least one hydrolyzable silyl group.
    Owner:SHIN ETSU CHEM IND CO LTD
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