Preparation method for infiltration agent with low viscosity and low shrinkage

A low-shrinkage, impregnating agent technology, applied in the direction of adhesives, adhesive types, cyclodextrin adhesives, etc., can solve secondary shrinkage gaps that are prone to cracks, resin-type impregnating agents with high viscosity, and impregnation processes Time extension and other problems, to achieve the effect of improving reaction conversion rate, increasing mutual solubility and uniform density

Inactive Publication Date: 2018-12-07
翟琳
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is that the curing shrinkage rate of the current acrylate type impregnating agent is large, which causes the impregnating agent to easily appear cracks and secondary shrinkage voids...

Method used

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Examples

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Embodiment Construction

[0022]Put 200-230g of straw residue and 400-450mL of sodium hydroxide solution with a mass fraction of 45% into a water-bath reaction kettle with a stirrer, heat the water-bath to 90-95°C, start the stirrer, and stir for 3-5 hours. To obtain the lignin lye, adjust the pH of the lignin lye to neutral with glacial acetic acid with a mass fraction of 95%, then move it into a high-speed centrifuge, and centrifuge it at a speed of 3500-3700r / min for 12-15min at a high speed to remove the supernatant Liquid, separated to obtain the lower layer of precipitation, washed with water for 2 to 3 times, then moved into an oven with a set temperature of 70 to 80°C, and dried for 4 to 5 hours to obtain wood powder for later use; add 70 to 75g of β-cyclodextrin to the beaker and 100-130mL of sodium hydroxide solution with a mass fraction of 90%, stirred at room temperature for 10-15min, then added 5-10g of 2,3-epoxypropyltrimethylammonium chloride, placed the beaker in a water bath, Heat up t...

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PUM

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Abstract

The invention relates to the technical field of infiltration agent preparation, and particularly relates to a preparation method for an infiltration agent with low viscosity and low shrinkage. According to the preparation method, acrylic acid and methacrylic acid are used as monomers; substances such as sodium dodecanesulphonate and sodium bicarbonate are added to obtain acrylate latex; a self-made rheological filler, vermiculite powder and the acrylate latex are mixed to obtain an infiltration liquid; a polyvinyl alcohol solution and n-butyraldehyde are subjected to a reaction; and the infiltration liquid, wood powder and a reinforcing agent are added to obtain the infiltration agent with the low viscosity and the low shrinkage. The vermiculite powder in the infiltration liquid enables the intersolubility between the polyvinyl alcohol and n-butyraldehyde molecules to be increased, and the reaction conversion rate is improved; lignin can produce large steric hindrance in the infiltration liquid, which facilitates improving the dispersion performance of acrylate particles in the infiltration liquid; the reinforcing agent accelerates volatilization of water-based volatile matters inan aqueous emulsion; and in addition, the lignin enables the deposition density of the infiltration liquid to be increased when a metal workpiece is bonded, enables the shrinkage amount of the infiltration liquid to be reduced during rapid curing, and has a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of impregnating agent preparation, in particular to a preparation method of a low-viscosity and low-shrinkage impregnating agent. Background technique [0002] Castings, weldments, powder metallurgy parts, and die-casting parts produced in the machinery industry often have volume shrinkage during the process of transforming molten liquid metal into solid metal substances. , small cracks and inclusions and other defects, which greatly affect its quality and use. Some defects are not easy to be found, and problems appear only after pressure testing after processing, resulting in waste of man-hours and raw materials. Therefore, in the machining process, it is necessary to seal and reinforce the processed product. The impregnation method is a process produced for this purpose. Impregnation is to infiltrate the sealing medium (usually a low-viscosity impregnant) into the micropores (slits) through natural infi...

Claims

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Application Information

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IPC IPC(8): C09J133/02C09J123/08C09J183/04C09J129/14C09J105/16C09J197/02C09J11/04C08F220/06C09K3/12
CPCC08F220/06C08L2205/035C09J11/04C09J133/02C09K3/12C08L23/0853C08L83/04C08L29/14C08L5/16C08L97/02C08K3/36C08K3/34
Inventor 翟琳邓博陈帅
Owner 翟琳
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