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One-component moisture cured polyurethane sealant containing novel water removal agent and preparation method of one-component moisture cured polyurethane sealant

A polyurethane sealant and moisture curing technology, which is applied in the field of sealants, can solve the problems of poor control of the amount of water remover, etc., and achieve the effect of improving bubbling phenomenon, little influence of viscosity, and good construction performance

Active Publication Date: 2018-04-13
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 dewatering 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 new dehydrating agent containing Aqueous one-component moisture-curing polyurethane sealant and preparation method thereof

Method used

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  • One-component moisture cured polyurethane sealant containing novel water removal agent and preparation method of one-component moisture cured polyurethane sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A one-component moisture-curing polyurethane sealant containing a new type of dewatering agent, in parts by weight, composed of the following raw materials: polyurethane prepolymer 15kg, plasticizer 10kg, dewatering agent a 1kg, dewatering agent b1kg, Packing 10kg, silane coupling agent 0.2kg, catalyst 0.1kg and auxiliary agent 1kg;

[0059] The plasticizer is didecyl phthalate;

[0060] The dewatering agent b is p-toluenesulfonyl isocyanate;

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

[0062] The catalyst is dibutyl tin 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 in a mass ratio of 1:2:20:1;

[0065] The ultraviolet absorber is ultraviolet absorber UV1; the flame retardant is magnesium hydroxide; the dispersant is glycerol monostearate;

[0066] The polyuretha...

Embodiment 2

[0069] A one-component moisture-curing polyurethane sealant containing a new type of dewatering agent, in parts by weight, composed of the following raw materials: polyurethane prepolymer 70kg, plasticizer 45kg, dewatering agent a10kg, dewatering agent b2kg, filler 60kg, 2kg of silane coupling agent, 1kg of catalyst and 5kg of auxiliary agent;

[0070] The plasticizer is diisononyl phthalate;

[0071] The dewatering agent b is triethyl orthoformate;

[0072] The filler is obtained by mixing heavy calcium carbonate, white carbon black and titanium dioxide in 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 in a mass ratio of 2:1:40:1;

[0076] The ultraviolet absorber is ultraviolet absorber UV1577; the flame retardant is aluminum hydroxide; the dispersant is glyceryl tristearate;

[0077] The polyurethane ...

Embodiment 3

[0080] A one-component moisture-curing polyurethane sealant containing a new type of dewatering agent, in parts by weight, composed of the following raw materials: polyurethane prepolymer 40kg, plasticizer 25kg, dewatering agent a 6kg, and dewatering agent b1. 2kg, 40kg filler, 1kg silane coupling agent, 0.5kg catalyst and 3kg auxiliary agent;

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

[0082] The dewatering agent b is calcium oxide;

[0083] The filler is obtained by mixing talc powder and organic bentonite in 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 in a mass ratio of 1:1:27:1;

[0087] The ultraviolet absorber is obtained by mixing the ultraviolet absorber UV1 and the ultraviolet absorber UV1577 in a mass ratio of 1:4; the flame retardant is obtained by mixing magnesium hydr...

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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 single-component moisture-curing polyurethane sealant containing a novel 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 as caulking in buildings, squares and highways. Sealing materials, as well as sealing for automobile manufacturing, glass installation, electronic filling, submarines and rockets. One-component polyurethane sealant uses the residual isocyanate groups in the system to react with moisture in the air to achieve crosslinking 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 in nature. If water is present, it will react quickly with...

Claims

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Application Information

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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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