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Polymer-based waterproof coating and preparation method thereof

A waterproof coating, polymer technology, applied in the direction of coating, can solve the problems of poor storage stability, unstable coating system, easy to deteriorate, etc., to improve surface hardness and waterproof performance, improve internal cross-linking density, surface Density-enhancing effect

Inactive Publication Date: 2021-03-16
成都亢倡菱涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of polymer-based waterproof coating and its preparation method, to solve the polymer-based waterproof coating in the prior art in the long-term storage process, the storage stability is poor, the coating system is unstable, easy to deteriorate, resulting in The problem of poor waterproof performance and mechanical properties of the product

Method used

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  • Polymer-based waterproof coating and preparation method thereof

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preparation example Construction

[0032] A preparation method of a polymer-based waterproof coating, the specific preparation steps comprising:

[0033] Phosphogypsum pretreatment:

[0034] In parts by weight, successively take 60-80 parts of phosphogypsum, 60-80 parts of absolute ethanol, 8-10 parts of concentrated sulfuric acid, and 10-20 parts of calcium chloride solution with a mass fraction of 1-10%. After mixing the phosphogypsum and the absolute ethanol ball mill, then adding the concentrated sulfuric acid, heating and stirring for reaction, then adding the calcium chloride solution, and adjusting the pH to alkaline, and reacting with hydrothermal stirring for 3-6 hours, Concentrate and dry to obtain pretreated phosphogypsum;

[0035] Enzymatic hydrolysis of chitosan:

[0036] Add chitosan enzyme with a chitosan solution mass of 0.01-0.03 to the chitosan solution with a mass fraction of 1-10%, stir the enzymolysis reaction for 3-5 hours, heat up to kill the enzyme, and cool to obtain chitosan enzymat...

Embodiment 1

[0044] Phosphogypsum pretreatment:

[0045] In parts by weight, successively take 60 parts of phosphogypsum, 60 parts of dehydrated ethanol, 8 parts of concentrated sulfuric acid, and 10 parts of calcium chloride solution with a mass fraction of 1%, and first ball mill the phosphogypsum and the dehydrated ethanol After mixing, add the concentrated sulfuric acid, heat and stir for reaction, then add the calcium chloride solution, adjust the pH to alkaline, react with hydrothermal stirring for 3 hours, concentrate and dry to obtain pretreated phosphogypsum;

[0046] Enzymatic hydrolysis of chitosan:

[0047] Adding chitosanase with a chitosan solution mass of 0.01 to a chitosan solution with a mass fraction of 1%, stirring the enzymolysis reaction for 3 hours, heating up to kill the enzyme, and cooling to obtain a chitosan enzymolysis solution;

[0048] Preparation of stabilizer:

[0049] In parts by weight, successively take 20 parts of the chitosan enzymolysis solution, 3 pa...

Embodiment 2

[0053] Phosphogypsum pretreatment:

[0054] In parts by weight, successively take 80 parts of phosphogypsum, 80 parts of dehydrated alcohol, 10 parts of concentrated sulfuric acid, and 20 parts of calcium chloride solution with a mass fraction of 10%, and first ball mill the phosphogypsum and the dehydrated ethanol After mixing, add the concentrated sulfuric acid, heat and stir for reaction, then add the calcium chloride solution, adjust the pH to alkaline, react with hydrothermal stirring for 6 hours, concentrate and dry to obtain pretreated phosphogypsum;

[0055] Enzymatic hydrolysis of chitosan:

[0056] To the chitosan solution with a mass fraction of 10%, add chitosanase with a chitosan solution quality of 0.03, stir the enzymolysis reaction for 5 hours, heat up to kill the enzyme, and cool to obtain chitosan enzymolysis solution;

[0057] Preparation of stabilizer:

[0058] In parts by weight, successively take 30 parts of the chitosan enzymolysis solution, 5 parts of...

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Abstract

The invention discloses a polymer-based waterproof coating and a preparation method thereof, and belongs to the technical field of building coatings. The product developed by the invention comprises the following raw materials in parts by weight: 100-150 parts of gypsum, 60-70 parts of water, 10-20 parts of slaked lime, 20-40 parts of water glass, 3-5 parts of sodium metaaluminate, 200-300 parts of styrene-butyl acrylate-acrylic acid copolymer emulsion and 30-50 parts of stabilizer. The stabilizer comprises 20-30 parts by mass of a chitosan solution with the mass fraction of 1-10%, 3-5 parts by mass of terephthalaldehyde and 0.3-0.5 part by mass of transition metal salt. The preparation method comprises the following steps: pretreatment of gypsum, enzymolysis of chitosan, preparation of the stabilizer and preparation of the polymer-based waterproof coating. The obtained product has excellent storage stability.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to a polymer-based waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement waterproof coating, referred to as JS waterproof coating, J refers to polymer, S refers to cement, so JS is polymer cement waterproof coating. Polymer cement waterproof coating is an organic liquid composed of polyacrylate emulsion, ethylene-vinyl acetate copolymer emulsion and other polymer emulsions and various additives, and inorganic powder composed of cement, quartz sand, various additives, and inorganic fillers. It is a kind of two-component, water-based building waterproof coating made by reasonable proportioning and compounding. Its waterproof mechanism is to block the penetration of water or the penetration of water molecules by forming a complete coating film. Many polymeric materials form complete and continuous films after drying. There a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D7/62C09D7/61C09D7/65C09D7/63
CPCC08K2003/2206C08K2003/3045C09D125/14C09D7/61C09D7/62C09D7/63C09D7/65C08L5/08C08K9/02C08K3/30C08K5/07C08K3/22C08K3/34C08K3/28C08K13/06
Inventor 雷小毛
Owner 成都亢倡菱涂料科技有限公司
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