A kind of metal roof waterproof coating and preparation method thereof

A technology for waterproof coatings and metal roofs, which is applied in the direction of coatings, etc., can solve the problems of affecting the service life of waterproof effects, poor low-temperature flexibility of waterproof coatings, and difficulty in adapting coatings to metal roofs, etc., to achieve improved storage stability, good weather resistance, and extended The effect of service life

Active Publication Date: 2022-07-26
东联新南方科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Waterproof coatings need to have good waterproof performance, and the main waterproofing effect in waterproof coatings is acrylic emulsion. The waterproof coating made of acrylic emulsion has excellent hardness, optical properties and weather resistance after hardening, but its low temperature flexibility Poor; because the metal roof is outdoors, in extreme weather, for example, in some areas, thunderstorms in the summer afternoon will quickly cool down the metal roof with high thermal conductivity by 20 to 30 degrees in extreme time, causing serious thermal problems. Tension, and due to the low temperature flexibility of traditional waterproof coatings, it is difficult for the coating to adapt to the thermal expansion and contraction of the metal roof, resulting in damage to the paint film, affecting the waterproof effect and service life

Method used

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  • A kind of metal roof waterproof coating and preparation method thereof
  • A kind of metal roof waterproof coating and preparation method thereof
  • A kind of metal roof waterproof coating and preparation method thereof

Examples

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preparation example 1

[0037] Preparation Example 1 of Polymer Emulsion: ① Preparation of Polyurethane Prepolymer: Take 2kg of isophorone diisocyanate and 6kg of polyoxypropylene glycol, add 0.2kg of ethylene glycol chain extender and 0.01kg of dibutyltin dilaurate The catalyst was reacted at a temperature of 70 ° C for 2 hours, then 0.4 kg of sodium 1,2-dihydroxy-3-propanesulfonate was added, and the reaction was continued until the NCO content remained unchanged to obtain a polyurethane prepolymer;

[0038] ②Preparation of pre-emulsion: take 3kg of butyl acrylate, 4kg of methyl acrylate, 3kg of n-octyl acrylate, 0.6kg of sodium lauryl sulfate, 0.2kg of nonylphenol polyoxyethylene ether, 0.2kg of dodecylene Sodium propyl succinate alkyl sulfonate, 0.3kg N-methylol acrylamide, 0.1kg ammonium persulfate and 100kg deionized water, stir and heat up to 85°C, keep stirring for 10min, then add 0.5kg polyether acrylate, 0.2 kg of polyethylene glycol monomethyl ether and 0.2 kg of polycaprolactone were stir...

preparation example 2

[0040] Preparation example 2 of polymer emulsion: ① Preparation of polyurethane prepolymer: take 2.5kg isophorone diisocyanate and 7kg polyoxypropylene glycol, add 0.3kg ethylene glycol chain extender and 0.015kg dilauric acid diol The butyltin catalyst was reacted at a temperature of 75°C for 2.5h, then 0.5kg of sodium 1,2-dihydroxy-3-propanesulfonate was added, and the reaction was continued until the NCO content remained unchanged to obtain a polyurethane prepolymer;

[0041] ②Preparation of pre-emulsion: take 3.75kg butyl acrylate, 5kg methyl acrylate, 3.75kg n-octyl acrylate, 0.9gkg sodium lauryl sulfate, 0.3kg nonylphenol polyoxyethylene ether, 0.3kg dodecane Alkyl allyl succinate sodium sulfonate, 0.45kg N-methylol acrylamide, 0.15kg sodium persulfate and 100kg deionized water, stir and heat up to 88°C, keep stirring for 12min, then add 0.75kg polyether acrylic acid Ester, 0.3kg polyethylene glycol monomethyl ether and 0.3kg polycaprolactone were kept at a temperature o...

preparation example 3

[0043] Preparation Example 3 of Polymer Emulsion: 1. Preparation of Polyurethane Prepolymer: Take 3kg of isophorone diisocyanate and 8kg of polyoxypropylene glycol, add 0.4kg of ethylene glycol chain extender and 0.02kg of dibutyltin dilaurate The catalyst was reacted at a temperature of 80 ° C for 3 hours, then 0.6 kg of sodium 1,2-dihydroxy-3-propanesulfonate was added, and the reaction was continued until the NCO content remained unchanged to obtain a polyurethane prepolymer;

[0044] ②Preparation of pre-emulsion: take 4.5kg butyl acrylate, 6kg methyl acrylate, 4.5kg n-octyl acrylate, 1.2kg sodium lauryl sulfate, 0.4kg nonylphenol polyoxyethylene ether, 0.4kg dodecane Alkyl allyl succinate sodium sulfonate, 0.5kg N-methylol acrylamide, 0.2kg potassium persulfate and 100kg deionized water, stir and heat up to 90°C, keep stirring for 15min, then add 0.8kg polyether acrylic acid Esters, 0.4kg polyethylene glycol monomethyl ether and 0.4kg polycaprolactone were kept at a temper...

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Abstract

The invention discloses a waterproof coating for metal roofs and a preparation method thereof. The main technical point of the technical solution is a waterproof coating for metal roofs, which includes A component and B component; the A component includes the following raw materials in parts by weight: water 150 -155 parts, dispersant 6-8 parts, defoamer 1-3 parts, wetting agent 1-2 parts, titanium dioxide 45-55 parts, zinc oxide 8-12 parts, heavy calcium carbonate 400-420 parts, 8-12 parts of ethylene glycol, 0.7-0.9 parts of hydroxyethyl cellulose and 0.8-1.2 parts of 2-amino-2-methyl-1-propanol; the B component includes the following components by weight: polymerization 340-360 parts of emulsion, 1-3 parts of bactericide, 5-7 parts of film-forming aids, 1-3 parts of defoamer and 5-7 parts of thickener. The waterproof coating of the present invention has the advantages of high adhesion to substrates, good low temperature flexibility, and good anti-cracking performance under the condition of rapid temperature change.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings, in particular to a metal roof waterproof coating and a preparation method thereof. Background technique [0002] Waterproof coating refers to a coating formed by the coating film that can prevent the leakage of rainwater or groundwater; among them, acrylic waterproof coating is a kind of commonly used waterproof coating, which is based on pure acrylic polymer emulsion and added with other additives. The one-component water-emulsion waterproof coating; the waterproof film formed by this waterproof coating after curing has certain extensibility, elasto-plasticity, crack resistance, impermeability and weather resistance, which can be waterproof and waterproof to the substrate. penetration and protection. [0003] In recent years, metal roofs have been widely used in industrial and public buildings. With the rapid development of metal roofs, more suitable protection systems are required ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D7/61C09D7/63C09D7/65C08F283/00C08F220/18C08F220/14C08F220/58C08F2/26C08F2/30C08F283/02C08F283/06C08G18/66C08G18/48C08G18/32C08G18/38
CPCC09D151/08C09D7/61C09D7/63C09D7/65C08F283/006C08F283/02C08F283/06C08F283/065C08G18/6674C08G18/4825C08G18/3206C08G18/3855C08K2003/2241C08K2003/2296C08K2003/265C08L51/08C08L1/284C08L33/02C08K13/02C08K3/22C08K3/26C08K5/053C08K3/32C08F220/14C08F220/58C08F2/26C08F2/30
Inventor 洪小弟
Owner 东联新南方科技(北京)有限公司
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