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Expansive colloid based on ethylene-vinyl acetate copolymer resin matrix and preparation method thereof

A vinyl acetate copolymerization and resin technology, applied in the field of foaming materials, can solve the problems of endangering human property and life safety, unsatisfactory reinforcement effect, easy aging of EVA foaming materials, etc., and achieve good flame retardant and anti-aging effects, The raw material components are convenient and easy to obtain, and the preparation method is simple

Inactive Publication Date: 2020-03-31
上海贺邦金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the EVA foam material used in the field of automobile noise reduction has problems such as aging and burning, which may cause a fire or aggravate the fire in an emergency, endangering human property and life safety
Moreover, the fillers used in the material, such as nano-calcium carbonate, have complex preparation processes, high production costs, and unsatisfactory reinforcement effects

Method used

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  • Expansive colloid based on ethylene-vinyl acetate copolymer resin matrix and preparation method thereof
  • Expansive colloid based on ethylene-vinyl acetate copolymer resin matrix and preparation method thereof
  • Expansive colloid based on ethylene-vinyl acetate copolymer resin matrix and preparation method thereof

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preparation example Construction

[0028] The preparation method of the expansion colloid based on the EVA resin matrix includes, step S1, the step of mixing and mixing raw material components at at least 75° C., wherein the raw material components, in terms of mass percentage, at least include: 60-75% of EVA resin ; Foaming agent 8-20%; Cross-linking agent 0.2-0.8%; Foaming accelerator 0.3-1%; Lubricant 0.3-1%; Tackifier 1-4%; Filler 5-20%; Flame retardant 2-10% of the anti-aging agent; 0.5-2% of the anti-aging agent; wherein, the filler is red brick powder modified by a silane coupling agent.

[0029] In step S1, as a filler, the red brick powder modified by the silane coupling agent is obtained, for example, by the following preparation method: ball-milling the red brick powder; using a silane coupling agent to modify the surface of the ball-milled red brick powder , to obtain red brick powder modified by silane coupling agent. Specifically, in a specific embodiment provided by the present invention, for ex...

Embodiment 1

[0037] The coarse-grained red brick powder was subjected to wet ball milling with a planetary ball mill (QM3SP04), the ball-to-material ratio was 2:1, and the ball milling time was 6h. Then use silane coupling agent KH550 to modify the surface of the ball-milled red brick powder, prepare an ethanol / water solution with a volume ratio of 1:1, weigh a certain mass of brick powder, mix 2% brick powder by mass of silane coupling agent The joint agent KH550 was slowly added to the solution, and the brick powder was added after proper stirring, and the modified red brick powder was obtained after stirring at a constant temperature in a 40°C water bath for 1 hour and drying;

[0038] Turn on the internal mixer for preheating, the temperature is 80 ° C, and when the temperature reaches, 71 parts of EVA resin (the content of vinyl acetate copolymer is 25-28%); 0.5 part of stearic acid; 10 parts of AC foaming agent; 0.5 parts of zinc oxide; 1.5 parts of C5 petroleum resin; 1 part of RD a...

Embodiment 2

[0040] Ball milling and modification process are identical with embodiment one, banburying formula and technology are as follows: open banbury mixer and carry out preheating, and temperature is 80 ℃, when temperature reaches, successively 61 parts of EVA resins (the content of vinyl acetate copolymer is 25 -28%); 0.5 part of stearic acid; 10 parts of AC foaming agent; 0.5 part of zinc oxide; 1.5 part of C5 petroleum resin; 1 part of RD antioxidant; 5 parts of hydrotalcite powder; 20 parts of modified red brick powder; BIBP0 Pour .5 parts into the 50mL mixing chamber, start the motor to drive the rotors in the mixing chamber to rotate relative to each other, and set the speed to 20r / min. After locking the device, EVA and each raw material component are mixed under the shearing action of the two rotors. uniform to obtain a mixed rubber. Then, the mixed rubber is cut into pieces and poured into an injection molding machine, and injection molding is performed at 90° C. to obtain a...

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Abstract

The invention provides an expansive colloid based on an ethylene-vinyl acetate copolymer resin matrix and a preparation method thereof. The expansive colloid at least includes, by mass, 60-75% of theethylene-vinyl acetate copolymer resin, 8-20% of a foamer, 0.2-0.8% of a crosslinking agent, 0.3-1% of a foaming improver, 0.3-1% of a lubricant, 1-4% of a tackifier, 5-20% of filler, 2-10% of a flameretardant and 0.5-2% of an anti-aging agent, wherein the filler is silane coupling agent modified red brick powder. The expansive colloid based on the ethylene-vinyl acetate copolymer resin matrix has high strength and excellent expansion rate, is good in synergistic flame-retarding effect, is low in cost and is suitable for industrial application.

Description

technical field [0001] The invention relates to the field of foamed materials, in particular to an expanded colloid based on an ethylene-vinyl acetate copolymer resin matrix and a preparation method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) foam material is based on EVA resin, adding foaming agent and various functional additives, and making it foam and expand under certain conditions. EVA foam material has the advantages of high expansion ratio, light weight, good adhesion, cushioning, sound insulation, noise reduction, etc. [0003] At present, the EVA foam material used in the field of automobile noise reduction has problems such as easy aging and flammability, and may cause fire or aggravate the fire in case of emergency, endangering human property and life safety. In addition, the filler used in the material, such as nano-calcium carbonate, has complicated preparation process, high production cost and unsatisfactory reinforcement eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K9/06C08K3/34C08K3/26C08J9/10
CPCC08J9/0066C08J9/009C08J9/0095C08J9/103C08J2203/04C08J2323/08C08K3/26C08K3/346C08K9/06
Inventor 顾海宏
Owner 上海贺邦金属制品有限公司
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