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One-component moisture-curing polyurethane sealant containing water remover and preparation method thereof

A polyurethane sealant, moisture curing technology, applied in the field of sealants, can solve the problem of poor control of the amount of water scavenger, and achieve the effect of improving bubbling phenomenon, reducing viscosity, and having little effect on viscosity

Active Publication Date: 2020-08-28
SHANDONG NORTH MODERN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the amount of water-removing agent is not well regulated, solve the impact of the existing monofunctional isocyanate on product quality, and ensure the storage stability of the product, the purpose of the present invention is to provide a water-removing agent containing One-component moisture-curing polyurethane sealant and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A one-component moisture-curing polyurethane sealant containing a water-removing agent, which consists of the following raw materials in parts by weight: 15 kg of polyurethane prepolymer, 10 kg of plasticizer, 1 kg of water-removing agent a, 1 kg of water-removing agent b, and filler 10kg, silane coupling agent 0.2kg, catalyst 0.1kg and auxiliary agent 1kg;

[0059] Described plasticizer is didecyl phthalate;

[0060] The water remover b is p-toluenesulfonyl isocyanate;

[0061] The filler is obtained by mixing nano-calcium carbonate, light calcium carbonate and carbon black according to the mass ratio of 1:2:2;

[0062] The catalyst is dibutyltin dilaurate;

[0063] The silane coupling agent is A-187;

[0064] The auxiliary agent is obtained by mixing ultraviolet absorber, antioxidant 1010, flame retardant and dispersant according to the mass ratio of 1:2:20:1;

[0065] The ultraviolet absorber is ultraviolet absorber UV1; the flame retardant is magnesium hydroxide...

Embodiment 2

[0069] A one-component moisture-curing polyurethane sealant containing a water-removing agent, which consists of the following raw materials in parts by weight: 70 kg of polyurethane prepolymer, 45 kg of plasticizer, 10 kg of water-removing agent a, 2 kg of water-removing agent, and 60 kg of filler , silane coupling agent 2kg, catalyst 1kg and auxiliary agent 5kg;

[0070] Described plasticizer is diisononyl phthalate;

[0071] The water remover b is triethyl orthoformate;

[0072] The filler is obtained by mixing heavy calcium carbonate, white carbon black and titanium dioxide according to a weight ratio of 1:4:1;

[0073] The catalyst is stannous octoate;

[0074] The silane coupling agent is A-189;

[0075] The auxiliary agent is obtained by mixing ultraviolet absorber, antioxidant 1010, flame retardant and dispersant according to the mass ratio of 2:1:40:1;

[0076] The ultraviolet absorber is ultraviolet absorber UV1577; the flame retardant is aluminum hydroxide; the ...

Embodiment 3

[0080] A one-component moisture-curing polyurethane sealant containing a water-removing agent, which consists of the following raw materials in parts by weight: 40 kg of polyurethane prepolymer, 25 kg of plasticizer, 6 kg of water-removing agent a, and 1.2 kg of water-removing agent b , filler 40kg, silane coupling agent 1kg, catalyst 0.5kg and auxiliary agent 3kg;

[0081] The plasticizer is cyclohexane 1,2-diisononyl dicarboxylate;

[0082] The water removal agent b is calcium oxide;

[0083] The filler is obtained by mixing talcum powder and organic bentonite according to a mass ratio of 9:1;

[0084] The catalyst is chelated tin;

[0085] The silane coupling agent is A-187;

[0086] The auxiliary agent is obtained by mixing ultraviolet absorber, antioxidant 1010, flame retardant and dispersant according to the mass ratio of 1:1:27:1;

[0087] The ultraviolet absorber is obtained by mixing ultraviolet absorber UV1 and ultraviolet absorber UV1577 according to the mass ra...

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PUM

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Abstract

The invention discloses one-component moisture cured polyurethane sealant containing a novel water removal agent. The one-component moisture cured polyurethane sealant containing the novel water removal agent is prepared from polyurethane prepolymer, a plasticizer, a water removal agent a, a water removal agent b, a filler, a silane coupling agent, a catalyst and an auxiliary agent; the inventiondiscloses the one-component moisture cured polyurethane sealant containing the novel water removal agent; the polyurethane prepolymer with low molecular weight is prepared and added into the formula of the one-component moisture cured polyurethane sealant to substitute monofunctional isocyanate p-toluenesulfonyl isocyanate serving as a high-efficiency chemical water removal agent in part of formulae, so that the requirements on types and using amounts of water removing agents in a product system are lowered; moreover, a series of serious problems caused by adding of excessive monofunctional isocyanate cannot be caused; the novel water removal agent a of the one-component moisture cured polyurethane sealant protects NCO active groups in a main body prepolymer with high molecular weight frombeing consumed, so that the final curing strength of the product reaches expected strength; better construction performance is achieved, and a bubbling phenomenon of the product is improved.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a one-component moisture-curing polyurethane sealant containing a water-removing agent and a preparation method thereof. Background technique [0002] Polyurethane sealant refers to a type of sealant that contains carbamate (-NH-CO-O-) in the molecular chain and isocyanate (-NCO) in the end group. It can be widely used in buildings, squares, and roads as caulking Sealing materials, and sealing in automotive manufacturing, glass installation, electronic filling, submarines and rockets, etc. The one-component polyurethane sealant uses the residual isocyanate groups in the system to react with moisture in the air to achieve cross-linking and curing. It is a paste with a certain viscosity at room temperature and is extruded with a glue gun during construction. The NCO group in the polyurethane prepolymer is very active. If there is water, it will quickly react with water, and a cro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C09J11/08C08G18/48C08G18/76C08G18/30C08G18/71
CPCC08G18/12C08G18/48C08G18/4825C08G18/4829C08G18/715C08G18/7614C08G18/7671C08K2003/162C08K2003/2224C08K2003/2227C08K2003/2241C08K2003/265C08K2201/011C08K2201/014C08L2205/025C09J11/04C09J11/06C09J11/08C09J175/08C08L75/08C08K13/02C08K3/22C08K3/36C08K5/06C08K3/26C08K5/12C08K3/16C08K3/34C08K3/346C08K13/04C08K7/26C08G18/307
Inventor 董斌杜厚俊王玉东于伟强刘杨华温静
Owner SHANDONG NORTH MODERN CHEM IND
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