Polyurethane waterproof mildew-resistant paint and preparation method thereof

A technology of polyurethane waterproofing and polyurethane prepolymer, which is applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, reflection/signal coatings, etc., can solve the problems that are not mature enough to reduce flow, increase tensile strength, The effect of high plasticizing efficiency

Inactive Publication Date: 2015-07-08
GUANGXI JIKUAN SOLAR ENERGY EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, there is no mature technology to prepare a coating that is mildew-proof, lightweight, waterproof, environmentally friendly, not easy to age, and long-lasting. Therefore, people are still constantly researching and testing water-based coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First, 45 parts of polyurethane prepolymer, 1 part of hydroxypropyl methacrylate, 4.5 parts of dioctyl terephthalate, 0.7 parts of titanate coupling agent NDZ-201, and 12 parts of rutile titanium dioxide were prepared in parts by weight. , 8 parts of zinc oxide, 0.3 parts of polysiloxane defoamer, 8 parts of talcum powder, 15 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (octyl-isothiazoline Ketone) 5 parts, leveling agent polyvinyl butyral 3 parts by weight, for material preparation.

[0044] The production method is to add 1.7 kg of ethanol with a volume concentration of 65-80% per kg of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.3 hours. Then add titanate coupling agent NDZ-201; continue to react for 4 hours; then add dioctyl terephthalate, rutile titanium dioxide, zinc oxide, po...

Embodiment 2

[0046] First, 50 parts of polyurethane prepolymer, 2 parts of hydroxypropyl methacrylate, 5 parts of dioctyl terephthalate, 0.9 parts of titanate coupling agent NDZ-201, and 17 parts of rutile titanium dioxide were prepared in parts by weight. , 9 parts of zinc oxide, 0.4 parts of polysiloxane defoamer, 10 parts of talcum powder, 16 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (isothiazolinone fungicide ) 7 parts, antifreeze benzyl alcohol 5 parts, for material preparation.

[0047] The production method is to add 1.7kg of ethanol with a volume concentration of 65-80% per kilogram of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.4 hours. Then add titanate coupling agent NDZ-201; continue to react for 5 hours, then add dioctyl terephthalate, rutile titanium dioxide, zinc oxide, polysiloxane d...

Embodiment 3

[0049] First, 55 parts of polyurethane prepolymer, 3 parts of hydroxypropyl methacrylate, 6.5 parts of dioctyl terephthalate, 1.2 parts of titanate coupling agent NDZ-201, and 20 parts of rutile titanium dioxide were prepared in parts by weight. , 10 parts of zinc oxide, 0.5 parts of polysiloxane defoamer, 13 parts of talcum powder, 18 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (octyl-isothiazoline Ketone) 10 parts, anti-settling agent modified hydrogenated castor oil 6 parts, and prepare the materials.

[0050] The production method is to add 1.7kg of ethanol with a volume concentration of 65-80% per kilogram of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.6 hours. Then add titanate coupling agent NDZ-201; continue to react for 6 hours; then add dioctyl terephthalate, rutile titanium...

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Abstract

The invention relates to a polyurethane waterproof mildew-resistant paint and a preparation method thereof. The paint comprises a polyurethane prepolymer, propyl hydroxyethyl methacrylate, dioctyl terephthalate, a titanate coupling agent NDZ-201, rutile titanium white, zinc oxide, a polysiloxane defoaming agent, talcum powder, a mixed solvent and a mildew preventive. The preparation method comprises the following steps: adding 1.7kg of 65-80 vol% ethanol into every kilo of propyl hydroxyethyl methacrylate, dissolving, mixing with the polyurethane prepolymer in a reaction kettle, reacting at 80-130 DEG C for 1.3-1.6 hours, and adding the titanate coupling agent NDZ-201; continuing the reaction for 4-6 hours; and adding the dioctyl terephthalate, rutile titanium white, zinc oxide, polysiloxane defoaming agent, mildew preventive, talcum powder and mixed solvent, and evenly mixing to obtain the polyurethane waterproof mildew-resistant paint product. The paint provided by the invention has favorable waterproof and mildew-resistant effects, and has the characteristics of high weather resistance and high pollution resistance.

Description

technical field [0001] The invention relates to a polyurethane coating, in particular to a polyurethane waterproof and mildew-proof coating and a preparation method thereof. Background technique [0002] With the development of the construction industry, the demand for coatings is increasing day by day. Paint is a material that can be coated on the surface of an object by different construction techniques to form a solid film with firm adhesion, certain strength, and continuity. . Objects are exposed to the atmosphere and are corroded by oxygen, moisture, etc., which are likely to cause damage such as metal corrosion, wood decay, and cement weathering. Applying paint to the surface of the object forms a protective film, which can prevent or delay these damages. Occurrence and development can extend the service life of various materials. [0003] Polyurethane coating is an important architectural coating and can also be used as industrial coating. It is a new type of mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/14C09D5/33C09D7/12C09D7/00
CPCC09D175/14C08L2205/03C09D5/14C09D7/20C09D7/61C09D7/63C09D7/65
Inventor 谢刚杨明慧马昭键李珠肖
Owner GUANGXI JIKUAN SOLAR ENERGY EQUIP
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