CN-122011665-A - Aging-resistant foaming highlight engineering plastic and preparation process thereof

CN122011665ACN 122011665 ACN122011665 ACN 122011665ACN-122011665-A

Abstract

The invention relates to the field of high polymer materials, and discloses an aging-resistant foaming highlight engineering plastic and a preparation process thereof, wherein the foaming highlight engineering plastic comprises ABS resin, microcapsule foaming master batch, nucleating agent, lubricant and antioxidant; the microcapsule foaming master batch is prepared by mixing ABS resin and functionalized thermal expansion microspheres, wherein the functionalized thermal expansion microspheres are prepared by modifying the thermal expansion microspheres by hydroxylamine, performing chemical silver plating, then coating the thermal expansion microspheres by silver obtained by modifying mercaptopropyl trimethoxy silane, condensing hydroxy silicone oil and mercaptopropyl trimethoxy silane, and introducing 2- (2-hydroxy-5-benzyl) benzotriazole and vinyl light stable monomer prepared by reacting acryloyl chloride into the thermal expansion microspheres by adopting a suspension polymerization method.

Inventors

OUYANG CHANGLIN
XU FENGZHU
MENG FANYU
CHEN ZHILIANG

Assignees

深圳市精研科洁科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. The aging-resistant foaming highlight engineering plastic is characterized by comprising, by weight, 100 parts of ABS resin, 10-25 parts of microcapsule foaming master batch, 0.5-2 parts of nucleating agent, 0.1-1 part of lubricant and 0.1-0.6 part of antioxidant; The preparation method of the microcapsule foaming master batch comprises the steps of uniformly mixing ABS resin and functionalized thermal expansion microspheres according to the mass ratio of 9:1, further uniformly mixing on a double-roller open mill, wherein the temperature of a front roller and the temperature of a rear roller are respectively 80 ℃ and 85 ℃, and then crushing into particles in a high-speed crusher; The functional thermal expansion microsphere is prepared by introducing active sites on the surface of the thermal expansion microsphere by utilizing hydroxylamine modified thermal expansion microsphere and performing chemical silver plating to prepare a silver coated thermal expansion microsphere, then adopting mercaptopropyl trimethoxy silane modified silver coated thermal expansion microsphere, and then carrying out condensation reaction on the prepared silane modified silver coated thermal expansion microsphere and hydroxyl silicone oil; The thermal expansion microsphere is prepared by using isopentane as a foaming agent, acrylonitrile, methyl methacrylate, butyl methacrylate, a vinyl light-stable monomer and hydroxyethyl methacrylate as a comonomer, magnesium hydroxide as a dispersing agent and adopting a suspension polymerization method, wherein the vinyl light-stable monomer is prepared by using 2- (2-hydroxy-5-benzyl) benzotriazole and acryloyl chloride to perform esterification reaction.
2. The aging-resistant foaming highlight engineering plastic according to claim 1 is characterized in that the nucleating agent is one or a combination of a plurality of organic montmorillonite, nano calcium carbonate, silicon dioxide and nano talcum powder, the lubricant is one or a combination of pentaerythritol stearate, N' -ethylene bis stearamide and glycerol monooleate, and the antioxidant is one or a combination of two of antioxidant 1076 and antioxidant 168.
3. The aging-resistant foamed highlight engineering plastic according to claim 1, wherein the preparation method of the functionalized thermal expansion microsphere comprises the following steps: A. Preparing hydroxylamine aqueous solution with the concentration of 1-1.5 mol/L, adding thermal expansion microspheres, stirring and reacting for 10-15 min at 65-70 ℃, and washing and suction filtering after the reaction is finished to obtain hydroxylamine modified thermal expansion microspheres; B. Taking silver nitrate in deionized water, uniformly mixing, dropwise adding ammonia water until a clear and transparent solution is obtained, then regulating the pH value of the solution to 12-12.5 by using a sodium hydroxide solution, and continuously slowly dropwise adding ammonia water until the solution is clear and transparent to obtain a silver ammonia solution; C. Adding hydroxylamine modified thermal expansion microspheres into freshly prepared silver-ammonia solution, stirring at room temperature for reaction for 3 hours, then dropwise adding glucose aqueous solution, controlling the dropwise adding speed to be 0.5-1 drop/s, continuing to react for 2 hours after the dropwise adding is finished, and washing, suction filtering and drying after the reaction is finished to obtain silver-coated thermal expansion microspheres; D. Dispersing the silver-coated thermal expansion microspheres in absolute ethyl alcohol, then adding mercaptopropyl trimethoxy silane, stirring and reacting for 6-8 hours in a nitrogen atmosphere, washing with absolute ethyl alcohol, suction filtering and drying after the reaction is finished, and obtaining silane-modified silver-coated thermal expansion microspheres; E. Dispersing the silane modified silver coated thermal expansion microspheres in isopropanol, heating to 50 ℃ under nitrogen atmosphere, then adding hydroxyl silicone oil and stannous isooctanoate to react for 2-4 hours, filtering to remove solvent after the reaction is finished, washing unreacted substances by petroleum ether and glycol, and drying in vacuum to obtain the functional thermal expansion microspheres.
4. The aging-resistant foaming highlight engineering plastic according to claim 3, wherein the addition ratio of silver nitrate, deionized water, hydroxylamine modified thermal expansion microspheres and glucose aqueous solution is 0.4g:30mL:0.1g:20mL, and the concentration of the glucose aqueous solution is 0.12-0.13 g/mL.
5. The aging-resistant foaming highlight engineering plastic according to claim 3, wherein the viscosity of the hydroxyl silicone oil is 3000cs, and the mass ratio of the silane modified silver coated thermal expansion microsphere to the hydroxyl silicone oil to the stannous isooctanoate is 4-7:10-12:0.1-0.15.
6. The aging-resistant foamed highlight engineering plastic according to claim 3, wherein the preparation method of the thermal expansion microsphere comprises the following steps: (1) Sequentially adding magnesium hydroxide, polyvinylpyrrolidone, sodium nitrite and sodium chloride into deionized water, fully stirring and dissolving, and stirring for 5min at a rotating speed of 1000r/min to obtain a water phase; (2) Taking isopentane, acrylonitrile, methyl methacrylate, butyl methacrylate, a vinyl light stable monomer, hydroxyethyl methacrylate, benzoyl peroxide and diallyl phthalate, and fully mixing to obtain a suspension polymerization oil phase; (3) Slowly dripping the oil phase into the water phase, and keeping the stirring speed of 1000r/min for 5min to obtain an oil-in-water suspension dispersion liquid; (4) And pouring the suspension dispersion liquid into a reaction kettle, filling nitrogen for 3 times to remove oxygen, pressurizing to 0.48-0.5 MPa under the nitrogen atmosphere, sealing, setting the polymerization stirring rotation speed to 400r/min, reacting at the constant temperature of 70 ℃ for 20 hours, cooling to room temperature after the reaction is finished, releasing pressure, discharging, and carrying out suction filtration, washing and drying to obtain the thermal expansion microsphere.
7. The aging-resistant foaming highlight engineering plastic according to claim 6, wherein the mass ratio of magnesium hydroxide, polyvinylpyrrolidone, sodium nitrite and sodium chloride in the step (1) is 7.2-7.8:0.25-0.3:0.06-0.075:30.
8. The aging-resistant foaming highlight engineering plastic according to claim 6, wherein the preparation method of the vinyl light-stable monomer in the step (2) comprises the steps of taking 2- (2-hydroxy-5-benzyl) benzotriazole, methyl hydroquinone and triethylamine in a reactor, adding tetrahydrofuran solvent, heating to 55-65 ℃ and stirring and mixing uniformly, then dropwise adding a mixed solution of acryloyl chloride and tetrahydrofuran, continuously stirring for 9-10 h after the dropwise adding, removing a tetrahydrofuran layer by using a separating funnel after the reaction is finished, adding deionized water, stirring and filtering, rotationally steaming to remove the solvent and recrystallizing by using ethanol to obtain the vinyl light-stable monomer.
9. The aging-resistant foamed high-gloss engineering plastic according to claim 6, wherein in the step (2), the mass ratio of isopentane, acrylonitrile, methyl methacrylate, butyl methacrylate, vinyl light-stable monomer, hydroxyethyl methacrylate, benzoyl peroxide and diallyl phthalate is 3:2:5:1:1-2:1:0.05:0.03.
10. A process for preparing the aging-resistant foamed highlight engineering plastic according to any one of claims 1 to 9, which is characterized by comprising the following steps: S1, weighing the components according to parts by weight, mixing ABS resin, nucleating agent, lubricant and antioxidant, extruding and granulating, wherein the extrusion temperature is 180-200 ℃, and obtaining a mixture; And S2, mixing the mixture with microcapsule foaming master batches, and performing injection molding foaming by an injection molding machine at the injection molding foaming temperature of 190-210 ℃ to obtain the aging-resistant foaming highlight engineering plastic.

Description

Aging-resistant foaming highlight engineering plastic and preparation process thereof Technical Field The invention belongs to the technical field of high polymer materials, and particularly relates to an aging-resistant foaming highlight engineering plastic and a preparation process thereof. Background The acrylonitrile-butadiene-styrene copolymer (ABS resin for short) is one of five synthetic resins, has the advantages of excellent low temperature resistance and insulating property, easy processing, stable product size, good surface gloss and the like, is easy to coat and color, can be subjected to secondary processing such as surface spraying metal, electroplating, welding, hot pressing, bonding and the like, and is widely applied to industrial fields such as machinery, automobiles, electronic appliances, instruments and meters, textile, building and the like, and is thermoplastic engineering plastic with extremely wide application. Along with the development of scientific technology, the polymer foaming material is rapidly developed due to the performances of light weight, good compression resistance, good buffering performance and the like, but the performance of the existing foaming material in an ultraviolet irradiation environment is attenuated, so that the mechanical property is obviously reduced, the ageing resistance is reduced, and the ageing resistance can be delayed to a certain extent by adding a light stabilizer into a formula, so that the small molecular auxiliary agent is easy to migrate and run off, and is difficult to provide a durable and stable protective effect, and meanwhile, the existing foaming material has the defects of poor heat resistance, poor mechanical property, poor hydrophobicity and the like, so that the wide application of the foaming material is severely limited. Disclosure of Invention In order to solve the defects in the background art, the invention aims to provide the aging-resistant foaming highlight engineering plastic and the preparation process thereof, and the prepared functional thermal expansion microsphere is used as a physical foaming agent to be added into a polymer matrix to prepare the foaming material with high tensile strength, good impact resistance and good ultraviolet aging resistance, heat resistance and water resistance. The aim of the invention can be achieved by the following technical scheme: The aging-resistant foaming highlight engineering plastic comprises, by weight, 100 parts of ABS resin, 10-25 parts of microcapsule foaming master batch, 0.5-2 parts of nucleating agent, 0.1-1 part of lubricant and 0.1-0.6 part of antioxidant; The preparation method of the microcapsule foaming master batch comprises the steps of uniformly mixing ABS resin and functionalized thermal expansion microspheres according to the mass ratio of 9:1, further uniformly mixing on a double-roller open mill, wherein the temperature of a front roller and the temperature of a rear roller are respectively 80 ℃ and 85 ℃, and then crushing into particles in a high-speed crusher; The functional thermal expansion microsphere is prepared by introducing active sites on the surface of the thermal expansion microsphere by utilizing hydroxylamine modified thermal expansion microsphere and performing chemical silver plating to prepare a silver coated thermal expansion microsphere, then adopting mercaptopropyl trimethoxy silane modified silver coated thermal expansion microsphere, and then carrying out condensation reaction on the prepared silane modified silver coated thermal expansion microsphere and hydroxyl silicone oil; The thermal expansion microsphere is prepared by using isopentane as a foaming agent, acrylonitrile, methyl methacrylate, butyl methacrylate, a vinyl light-stable monomer and hydroxyethyl methacrylate as a comonomer, magnesium hydroxide as a dispersing agent and adopting a suspension polymerization method, wherein the vinyl light-stable monomer is prepared by using 2- (2-hydroxy-5-benzyl) benzotriazole and acryloyl chloride to perform esterification reaction. Preferably, the nucleating agent is one or more of organic montmorillonite, nano calcium carbonate, silicon dioxide and nano talcum powder, the lubricant is one or more of pentaerythritol stearate, N' -ethylene bis stearamide and glycerol monooleate, and the antioxidant is one or two of antioxidant 1076 and antioxidant 168. Preferably, the preparation method of the functionalized thermal expansion microsphere comprises the following steps: A. Preparing hydroxylamine aqueous solution with the concentration of 1-1.5 mol/L, adding thermal expansion microspheres, stirring and reacting for 10-15 min at 65-70 ℃, and washing and suction filtering after the reaction is finished to obtain hydroxylamine modified thermal expansion microspheres; B. Taking silver nitrate in deionized water, uniformly mixing, dropwise adding ammonia water until a clear and transparent solution is obtained, then regulating the pH value of t