Damp-heat-resistant high-strength single-component polyurethane primer-free adhesive sealant and preparation method thereof

A bonding and sealing, high-strength technology, applied in polyurea/polyurethane adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve products that are difficult to extrude, increase in viscosity, and seal Glue thickening and other problems, to achieve the effect of enhanced physical and mechanical properties, enhanced moisture and heat resistance, and high mechanical properties

Active Publication Date: 2020-10-23
SHANDONG NORTH MODERN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, silica is directly added to the product together with other fillers for mixing and stirring, but directly adding silica to the polyurethane sealant system will cause the reaction of silicon hydroxyl groups and NCO groups to form hydrogen bonds, resulting in thickening of the sealant, The viscosity gradually increases, which eventually leads to the problem that the product is difficult to extrude.

Method used

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  • Damp-heat-resistant high-strength single-component polyurethane primer-free adhesive sealant and preparation method thereof
  • Damp-heat-resistant high-strength single-component polyurethane primer-free adhesive sealant and preparation method thereof
  • Damp-heat-resistant high-strength single-component polyurethane primer-free adhesive sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A heat-resistant, high-strength one-component polyurethane primer-free adhesive sealant, composed of the following raw materials: hydroxyl-terminated polyether polyol 8kg, first polyester polyol 3kg, first isocyanate 4kg, first plasticizer 12kg, 15kg of white carbon black modified polyurethane prepolymer, 0.5kg of water scavenger, 18kg of inorganic filler, 1kg of resin filler, 1kg of auxiliary agent and 0.01kg of first catalyst;

[0066] The hydroxyl-terminated polyether polyol is a trifunctional polyoxypropylene ether with an average molecular weight of 3000;

[0067] The first polyester polyol is a difunctional polyester polyol with an average molecular weight of 500;

[0068] The first isocyanate is diphenylmethane diisocyanate;

[0069] The first plasticizer is epoxy soybean oil;

[0070] The dewatering agent is p-toluenesulfonyl isocyanate;

[0071] The inorganic filler is acetylene carbon black;

[0072] The resin filler is a polyphenol type glycidyl ether epoxy resin;

[007...

Embodiment 2

[0082] A heat-resistant, high-strength one-component polyurethane primer-free adhesive sealant, consisting of the following raw materials: hydroxyl-terminated polyether polyol 15kg, first polyester polyol 10kg, first isocyanate 5kg, first plasticizer 22kg, 35kg of white carbon black modified polyurethane prepolymer, 1kg of water scavenger, 25kg of inorganic filler, 3kg of resin filler, 2kg of auxiliary agent and 0.4kg of first catalyst;

[0083] The hydroxyl-terminated polyether polyol is a trifunctional polyoxyethylene ether with a molecular weight of 6000;

[0084] The first polyester polyol is a bifunctional polyester polyol with a molecular weight of 3000;

[0085] The first isocyanate is toluene diisocyanate;

[0086] The first plasticizer is dipropylene glycol dibenzoate;

[0087] The dewatering agent is calcium oxide;

[0088] The inorganic filler is light calcium carbonate;

[0089] The resin filler is terpene resin;

[0090] The auxiliary agent is calcium hydroxide;

[0091] The f...

Embodiment 3

[0099] A heat-resistant, high-strength one-component polyurethane primer-free adhesive sealant, composed of the following raw materials: hydroxyl-terminated polyether polyol 10kg, first polyester polyol 5kg, first isocyanate 4.2kg, first plasticizing 18kg of white carbon black modified polyurethane prepolymer, 0.6kg of water scavenger, 20kg of inorganic filler, 1.5kg of resin filler, 1.2kg of auxiliary agent and 0.1kg of first catalyst;

[0100] The hydroxyl-terminated polyether polyol is a trifunctional polyoxypropylene ether with a molecular weight of 4000;

[0101] The first polyester polyol is a difunctional polyester polyol with a molecular weight of 1000;

[0102] The first isocyanate is composed of isophorone diisocyanate and hexamethylene diisocyanate in a mass ratio of 1:1;

[0103] The first plasticizer is composed of diisodecyl phthalate and diisononyl phthalate in a mass ratio of 1:2;

[0104] The dewatering agent is composed of p-toluenesulfonyl isocyanate and calcium oxid...

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Abstract

The invention discloses a damp-heat-resistant high-strength single-component polyurethane primer-free adhesive sealant and a preparation method thereof, and belongs to the technical field of polyurethane sealants. The single-component polyurethane primer-free adhesive sealant disclosed by the invention contains a self-made white carbon black modified polyurethane prepolymer; after the white carbonblack modified polyurethane prepolymer is added into the polyurethane sealant, the overall damp-heat resistance of the product can be enhanced so that compared with the single-component polyurethaneprimer-free adhesive sealant without the white carbon black modified polyurethane prepolymer, the adhesive stability of the single-component polyurethane primer-free adhesive sealant after damp-heat aging can be obviously improved; the obtained single-component polyurethane primer-free adhesive sealant has relatively high mechanical properties after being cured for 7 days under standard conditions, wherein the shearing strength reaches 7.5 MPa or above, the tensile strength reaches 12.5 MPa or above, the tearing strength reaches 25 N / mm or above, and the physical and mechanical performance requirements of the polyurethane adhesive sealant can be met in case of assembling windshields on different traffic vehicles.

Description

Technical field [0001] The invention relates to the technical field of polyurethane adhesive sealants, in particular to a single-component polyurethane primer-free adhesive sealant with high strength and humidity resistance and a preparation method thereof. Background technique [0002] One-component polyurethane adhesive sealant is a polyurethane adhesive made by fully mixing NCO-terminated polyurethane prepolymer with fillers, plasticizers, curing agents, additives, etc. The bonding principle is the isocyanate group in the colloid and air The water molecules in the resin react and gradually solidify from the outside to the inside to form a cross-linked network. At the same time, the colloid reacts with the active groups on the surface of the substrate to form a firm bond; one-component polyurethane adhesive sealant because of its good mechanics Performance, weather resistance, oil resistance and excellent elasticity, it is widely used in the bonding and sealing of windshield gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/08C09J11/04C09J11/06
CPCC08K2003/2206C08K2003/265C08K2201/011C08K2201/014C08L2205/025C08L2205/03C08L2205/035C09J11/04C09J11/06C09J11/08C09J175/04C08L91/00C08L63/00C08K3/04C08K5/42C08K7/26C08L45/00C08K13/04C08K3/26C08K3/22C08K5/12C08L93/04C08K5/544C08K3/34
Inventor 于伟强张健伟杜厚俊陈晓理王玉东刘杨华王延玲赵玉萍
Owner SHANDONG NORTH MODERN CHEM IND
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