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Long-opening-time primer and preparation method thereof

A technology of open time and primer, which is applied in the direction of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of short open time of the primer, and achieve improved medium resistance and Adhesive performance, long open time, effect of reducing reaction speed

Inactive Publication Date: 2015-06-03
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to achieve better adhesion, the existing primers matching polyurethane adhesive sealants generally need to add resins with high isocyanate content to improve the bonding force with one-component moisture-curing polyurethane adhesives; Reacts with water in the air, so primers based on resins with high isocyanate content generally have a short open time

Method used

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  • Long-opening-time primer and preparation method thereof
  • Long-opening-time primer and preparation method thereof
  • Long-opening-time primer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment

[0054] Silane-terminated aliphatic isocyanate prepolymers were prepared as follows:

[0055] 350 grams of polyoxypropylene trihydric alcohol (average molecular weight 350) is added in the reactor with mechanical stirring, nitrogen protection and heating device. Heated to 50°C under the protection of nitrogen, then added 1512 grams of 1,6-hexamethylene diisocyanate biuret, stirred evenly, added 1 gram of dibutyltin dilaurate, kept at 70°C and stirred for 4 hours, then added mercaptopropyl trimethoxy 1176g of base silane, and continue to keep warm at 50°C for 4h to obtain a silane-terminated aliphatic isocyanate prepolymer.

[0056] Adhesion promoters are prepared as follows:

[0057] 269 ​​grams of N-(2-aminoethyl)-3-aminopropyltriethoxysilane was added to the reactor equipped with mechanical stirring, nitrogen protection and heating device. Heated to 80°C under the protection of nitrogen, then added 236 grams of (3-glycidoxypropyl)trimethoxysilane, stirred evenly, and contin...

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Abstract

The invention relates to a long-opening-time primer and a preparation method thereof. The primer is matched with a single-component moisture-curing polyurethane sealant. The primer comprises the following components in percentage by mass: 15-35% of silane terminated polymer, 2-10% of bonding accelerator, 0.1-2% of stabilizing agent, 1-10% of plasticizer, 3-15% of colorant, 0.3-1.5% of dispersing agent, 0.1-2.5% of antioxidant, 0.1-2.5% of ultraviolet absorbent, 0.1-2.5% of light stabilizer and 30-70% of solvent. The primer can be used for enhancing the bonding stability of the single-component polyurethane adhesive when being used for glass assembly and elastic bonding. The system is free of isocyanate, lowers the reaction speed, prolongs the opening time of the primer, has favorable adhesion with ink glass, common primers and finish coats, and enhances the medium resistance and bonding performance of the silane terminated polymer.

Description

technical field [0001] The invention relates to an adhesive, in particular to a primer with a long open time and a preparation method thereof. The primer is used together with a single-component polyurethane adhesive and is used for windshield assembling in the manufacture of transportation equipment And other elastic bonding, used to improve the bonding stability of the one-component polyurethane adhesive on the surface of different materials and the performance after aging, and at the same time make up for the defects of the ink layer of the windshield, and improve the aging resistance of the bonding. Background technique [0002] As automobiles, rail vehicles, passenger cars, ships and other transportation vehicles have higher and higher requirements for comfort and safety, the glass of the driver's cab and compartment is generally connected to the car body by elastic bonding instead of rubber strips. Not only the overall sealing performance is improved, but also the glas...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J175/08C09J11/04C09J11/06C09J11/08C08G18/66C08G18/48C08G18/38C08G18/12
Inventor 曾照坤
Owner TONSAN ADHESIVES INC
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