Silane modified polyurethane sealing glue with quick surface dry as well as preparation and application thereof

A polyurethane sealant and silane modification technology, which is applied in engine seals, polyurea/polyurethane adhesives, sealing devices, etc., can solve the problems of long dry time of sealants, difficult quality control, and reduced construction efficiency. Achieve the effect of meeting the requirements of assembly process, fast surface drying speed and improving construction efficiency

Active Publication Date: 2012-06-20
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above technical solutions for preparing sealant, the prepolymer is synthesized by hydroxyl-terminated polyether and isocyanate. The process is complicated, the quality is difficult to control, and the sealant takes a long time to dry, which reduces the construction efficiency to a certain extent.

Method used

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  • Silane modified polyurethane sealing glue with quick surface dry as well as preparation and application thereof
  • Silane modified polyurethane sealing glue with quick surface dry as well as preparation and application thereof
  • Silane modified polyurethane sealing glue with quick surface dry as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) First place calcium carbonate and carbon black in a constant temperature oven and dry at 120°C for 20 hours;

[0045] (2) 100 parts by weight of SPUR 1015LM, 20 parts by weight of light calcium carbonate, 20 parts by weight of heavy calcium carbonate, 50 parts by weight of carbon black, 40 parts by weight of dioctyl phthalate, 3 parts by weight of gas phase dioxide Silicon (the HB-215 product of Guangzhou Jibisheng Technology Industrial Co., Ltd., the same below), 1 part by weight of 2-(2-hydroxyl-3,5-dibutyl-tert-phenyl)-5-chlorobenzotriazole, 1 Parts by weight of 2,6-tertiary butyl-4-methylphenol and 1 part by weight of vinyltrimethoxysilane are added to the reaction kettle of the planetary mixer, and the temperature is 80°C, and the vacuum degree is 0.090±0.005MPa. Rotate at 50rpm, maintain 80°C, 0.090±0.005MPa vacuum, stir for 180 minutes, mix well;

[0046] (3) Afterwards, the temperature in the kettle was lowered to 40±5°C, filled with nitrogen, added 2 parts...

Embodiment 2

[0050] (1) Dry calcium carbonate and carbon black in a constant temperature oven at 150°C for 5 hours;

[0051] (2) 100 parts by weight of SPUR 1050MM, 60 parts by weight of light calcium carbonate, 60 parts by weight of heavy calcium carbonate, 20 parts by weight of carbon black, 60 parts by weight of dibutyl phthalate, 8 parts by weight of gas phase dioxide Silicon, 2 parts by weight of 2-(2-hydroxy-3,5-dibutyl-tert-phenyl)-5-chlorobenzotriazole, 2 parts by weight of bis(3,5-tertiary butyl-4-hydroxyphenyl ) thioether and 2 parts by weight of vinyltriethoxysilane are added to the reaction kettle of the planetary mixer, at a temperature of 90°C and a vacuum of 0.090±0.005MPa at a revolution speed of 50rpm to maintain a temperature of 90°C and a vacuum of 0.090±0.005MPa Vacuum, stir for 120 minutes, mix well;

[0052] (3) After that, the temperature in the kettle was lowered to 40±5°C, filled with nitrogen, added 3 parts by weight of γ-aminopropyltriethoxysilane, and stirred a...

Embodiment 3

[0056] (1) Dry calcium carbonate and carbon black in a constant temperature oven at 140°C for 12 hours;

[0057] (2) 100 parts by weight of SPUR 1050MM, 40 parts by weight of light calcium carbonate, 40 parts by weight of heavy calcium carbonate, 50 parts by weight of carbon black, 50 parts by weight of didecyl phthalate, 4 parts by weight of gas phase dioxide Silicon, 1 part by weight of 2-(2-hydroxy-3,5-dibutyl-tert-phenyl)-5-chlorobenzotriazole, 1 part by weight of 2,6-tertiary butyl-4-methylphenol and 3 Add vinyltriethoxysilane in parts by weight to a planetary mixer reactor, and stir for 150 minutes at a temperature of 85°C and a vacuum of 0.090±0.005MPa at a revolution speed of 50rpm, maintaining a temperature of 85°C and a vacuum of 0.090±0.005MPa ,well mixed;

[0058] (3) After that, the temperature in the kettle was lowered to 40±5°C, filled with nitrogen, added 4 parts by weight of 3-(2,3-glycidoxy)propyltrimethoxysilane, and stirred at a revolution speed of 50 rpm ...

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Abstract

The invention discloses silane modified polyurethane sealing glue with quick surface dry as well as a preparation and an application thereof. The sealing glue is prepared from the following substances in parts by weight: 100 parts of silane modified polyurethane prepolymer, 40-60 parts of plasticizer, 40-120 parts of calcium carbonate, 20-50 parts of carbon black, 3-8 parts of thixotropic agent, 1-2 parts of light stabilizer, 1-2 parts of antioxidant, 1-3 parts of water absorbent, 2-4 parts of adhesion promoter and 0.2-0.5 part of catalyst. According to the invention, by dispersing the raw materials at a certain temperature and under vacuum conditions to prepare the silane modified polyurethane sealing glue product. The product is the single-component sealing glue cured at a room temperature and has a fast surface dry speed, and the surface dry time is 15-20 min; the sealing glue does not influence the assembling of parts so that the sealing glue can be applied to industrial fields including gluing, sealing and the like of automotive windscreens; the sealing glue does not need to be firstly coated in the construction process and has the advantages of higher temperature resistance, water resistance, ageing resistance and higher physical mechanics performances after being cured.

Description

technical field [0001] The invention belongs to the technical field of polyurethane sealants / adhesives, and relates to a fast surface-drying silane-modified polyurethane sealant with silane-modified polyurethane prepolymer as a main raw material and its preparation and application. Background technique [0002] Sealant is one of the important process materials in automobile production. It plays an important role in the structural reinforcement of automobiles, sealing and antirust, vibration and noise reduction, interior and exterior decoration, simplification of manufacturing process, and reduction of body weight. In recent years, with the development of the automotive industry in the direction of environmental protection, energy saving, safety and comfort, and lightweight, the development and application of new high-performance automotive sealants will become more and more important. The design concept and manufacturing technology of the automobile industry are constantly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09K3/10B60J10/02B60J10/16B60J10/70
Inventor 薛纪东李吉明钟汉荣
Owner GUANGZHOU MECHANICAL ENG RES INST
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