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Single-component mildewproof negative-radical polyurethane building sealant and preparation method thereof

A polyurethane, one-component technology, applied in the field of sealants, can solve problems such as affecting the service life of buildings, no mildew and root resistance, and sealants without root resistance, and achieves good water removal effect, long shelf life, and good bonding performance. Effect

Active Publication Date: 2016-04-13
GUANGDONG PUSTAR SEALED RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, since the sealant is prone to mildew and failure when used in a humid environment for a long time, it must have a mildew-proof function
The sealant in the prior art has no root-blocking function, and there is no product with both mildew-proof and root-blocking functions. When used in vegetation roof construction, water leakage often occurs at the sealant application site, which affects the service life of the building.

Method used

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  • Single-component mildewproof negative-radical polyurethane building sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A single-component anti-mildew and root-resistance polyurethane building sealant, which comprises the following components by weight percentage:

[0086] Polyurethane prepolymer 30% ~ 70%

[0087] Antifungal agent 1% ~ 5%

[0088] Chemical root inhibitor 1% ~ 7%

[0089] Filler 20%~55%

[0090] Silane adhesion promoter 1% to 3%

[0091] Catalyst 0.1%~1%

[0092] Moisture scavenger 0.1% ~ 0.5%;

[0093] Wherein, the polyurethane prepolymer comprises the following components in weight percent:

[0094] Polyoxypropylene diol 25%~60%

[0095] Polyoxypropylene triol 10%~30%

[0096] Polyisocyanate 5%~10%

[0097] Plasticizer 20% to 50%.

[0098] Among them, the antifungal agent is a substance that does not contain active H, specifically silver-loaded zeolite, silver-loaded molecular sieve, silver-loaded activated carbon, nano-titanium dioxide, nano-zinc oxide, isothiazolinone compounds, pyrazole compounds, thiophene compounds, One or a mixture of two or more azirid...

Embodiment 2

[0121] A single-component anti-mildew and root-resistance polyurethane building sealant, which comprises the following components by weight percentage:

[0122] Polyurethane prepolymer 53%

[0123] Silver loaded molecular sieve 2%

[0124] chemical root inhibitor B 2 3%

[0125] Ground calcium carbonate 13%

[0126] PVC paste resin 7%

[0127] Light calcium carbonate 20%

[0128] γ-Glycidyl etheroxypropyl triethoxysilane 1.5%

[0129] Dibutyltin dilaurate 0.2%

[0130] p-methylsulfonyl isocyanate 0.3%;

[0131] Wherein, the polyurethane prepolymer comprises the following components by weight percentage:

[0132] Polyoxypropylene glycol 33%

[0133] Polyoxypropylene Triol 14.5%

[0134] Diphenylmethane diisocyanate 5.5%

[0135] Dioctyl phthalate 47%;

[0136] Wherein, the molecular weight of polyoxypropylene triol is 2000, and the molecular weight of polyoxypropylene diol is 6000.

[0137] In this embodiment, the polyurethane prepolymer is prepared by the following ...

Embodiment 3

[0151] A single-component anti-mildew and root-resistance polyurethane building sealant, which comprises the following components by weight percentage:

[0152] Polyurethane prepolymer 48%

[0153] Silver loaded activated carbon 4.5%

[0154] chemical root inhibitor B 5 4%

[0155] Ground calcium carbonate 17%

[0156] Carbon black 5%

[0157] Calcined kaolin powder 19%

[0158] Gamma-ureidopropyltriethoxysilane 1.4%

[0159] Stannous octoate 0.8%

[0160] p-methylsulfonyl isocyanate 0.3%;

[0161] Wherein, the polyurethane prepolymer comprises the following components by weight percentage:

[0162] Polyoxypropylene glycol 35%

[0163] Polyoxypropylene Triol 24%

[0164] Toluene diisocyanate 8.2%

[0165] Dioctyl phthalate 12.8%

[0166] Dinonyl phthalate 20%;

[0167] Wherein, the molecular weight of polyoxypropylene triol is 3000, and the molecular weight of polyoxypropylene diol is 6000.

[0168] In this embodiment, the polyurethane prepolymer is prepared by t...

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Abstract

The invention relates to the technical field of sealants, particularly a single-component mildewproof negative-radical polyurethane building sealant and a preparation method thereof. The single-component mildewproof negative-radical polyurethane building sealant comprises a polyurethane prepolymer, a mildew preventive, a chemical negative-radical agent, a filler, a silane bonding accelerator, a catalyst and a moisture remover. The polyurethane prepolymer comprises polyoxypropylene diol, polyoxypropylene triol, polyisocyanate and a plasticizer. The single-component mildewproof negative-radical polyurethane building sealant simultaneously comprises the mildew preventive and chemical negative-radical agent, and thus, has the dual functions of mildew resistance and negative radical. The single-component mildewproof negative-radical polyurethane building sealant is especially suitable for node treatment of the vegetation roofing waterproofing structure, and can prevent the plant root system from piercing into the sealant, which can cause inactivation of the additional waterproof layer. The preparation method is simple, and is suitable for industrialized large-scale production.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a single-component anti-mildew and root-resistance polyurethane building sealant and a preparation method thereof. Background technique [0002] With the rapid development of the country's urbanization process, the environmental crisis is becoming increasingly severe. The use of urban roof greening can effectively improve urban air quality, alleviate the urban heat island effect, and enhance the overall urban landscape. Vegetated roof structures generally require an additional waterproof layer, and most of the additional waterproof layers are made of polymer materials. Since the root system of plants planted on vegetation roofs is generally more developed and has a strong puncture ability, it is easy to cause the external waterproof layer to puncture and fail, resulting in water leakage. Therefore, the external waterproof layer material generally needs to use materials with ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C09J11/08C08G18/48
CPCC08G18/4812C08K3/04C08K3/26C08K3/346C08K9/12C08K13/06C08K2003/265C08K2201/011C08K2201/014C09J175/08C08L27/06C08K5/5435C08K5/57C08K5/29
Inventor 詹锋赵志静潘生辉
Owner GUANGDONG PUSTAR SEALED RAYON CO LTD
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