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Preparation method of waterproof thermal insulation coating and waterproof thermal insulation coating
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A thermal insulation coating, room temperature technology, applied in the field of coatings, can solve the problems of limited improvement of acrylic emulsion performance, inability to effectively exert the functions of thermal insulation, heat insulation and flame retardant, and achieve improved dispersibility and compatibility, good thermal insulation and thermal insulation. effect, effect of reducing activity
Pending Publication Date: 2022-05-31
FUJIAN BAIYI TECH CO LTD
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[0003] In the existing silicon-acrylic solution, organic silicon polymers, such as silica gel, are often directly added to monomers such as acrylic monomers, vinyl acetate monomers and styrene monomers, and emulsion polymerization is carried out under the action of emulsifiers. Silicone is used to form covalent bonds with silicon-oxygen atoms in inorganic materials to improve the performance of acrylic emulsions, but unmodified silica gel has strong hydrophilicity, and the heat preservation of silica gel itself The functions of heat insulation and flame retardancy cannot be effectively exerted, so that the performance improvement of acrylic emulsion is limited
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Embodiment 1
[0025] The invention provides a preparation method of a waterproof thermal insulation coating and the waterproof thermal insulation coating, comprising the following steps:
[0026] 1) First prepare supercritical aerogel raw materials:
[0028] Wherein, the orthosilicate in the step S1 is methyl orthosilicate or ethyl orthosilicate, and in this embodiment, methyl orthosilicate is used.
[0029] S2, the first mixed solution in S1 is allowed to stand for natural cooling, wherein the silica sol is gradually deposited to the bottom of the container, so that the standing first mixed solution is stratified, and the stand-still time lasts until the stratification has no obvious change. , take out the silica sol in...
Embodiment 2
[0043] The invention provides a preparation method of a waterproof thermal insulation coating and the waterproof thermal insulation coating, comprising the following steps:
[0044] 1) First prepare supercritical aerogel raw materials:
[0045] S1. Mix orthosilicate and ammonia water in a ratio of 1:(1.25-2), add hydrochloric acid to control the pH of the mixed solution between 5-6, put it into a stirrer, and at room temperature with 900r / min Speed stirring for 3-6h to obtain the first mixed solution;
[0046] Wherein, the orthosilicate in the step S1 is methyl orthosilicate or ethyl orthosilicate, and ethyl orthosilicate is used in this embodiment.
[0047] S2, the first mixed solution in S1 is allowed to stand for natural cooling, wherein the silica sol is gradually deposited to the bottom of the container, so that the standing first mixed solution is stratified, and the stand-still time lasts until the stratification has no obvious change. , take out the silica sol in t...
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Abstract
The preparation method comprises the following steps: carrying out replacement foaming on silicon dioxide obtained by stirring orthosilicate and ammonia water by using supercritical nitrogen or ammonia gas to obtain super-gel aerogel, crushing the super-gel aerogel, and then modifying the crushed aerogelpowder by using silazane to obtain the waterproof heat-insulating coating. The preparation method comprises the following steps: preparing a silicon dioxide aerogel powder, mixing the silicon dioxide aerogel powder with an acrylic monomer, a vinyl acetatemonomer and a styrenemonomer under the action of an emulsifier to obtain a silicone acrylic emulsioncoating, uniformly dispersing silicon dioxide aerogel particles modified by silazane in an acrylic emulsion, and enhancing the compatibility between the silicon dioxide particles and a polymer, the nano silicon-acrylic composite emulsion with good stability and compatibility is obtained, so that the coating prepared from the silicon-acrylic composite emulsion has better heat insulation and heat preservation effects.
Description
technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of a waterproof thermal insulation coating and a waterproof thermal insulation coating. Background technique [0002] With the continuous development of the coating industry, in order to meet the requirements of various industries for waterproof coatings, it is necessary to improve the performance of waterproof coatings under the condition that the existing silicone-acrylic coatings meet the performance requirements of waterproof, water resistance, acid and alkali corrosion resistance, etc. Or improve it to make it applicable to more industries and more use cases. [0003] In the existing silicon-acrylic solution, organosilicon polymers, such as silica gel, are often directly added to monomers such as acrylic monomers, vinyl acetate monomers and styrene monomers, and carry out emulsion polymerization under the action of an emulsifier. The performance of acrylic emuls...
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