High-elasticity silane-terminated polypropylene oxide sealant and preparation method thereof

A polypropylene oxide and silane-capped technology, which is applied in the direction of adhesives, polyether adhesives, polymer adhesive additives, etc., can solve the problems of unsatisfactory sealing, anti-vibration, general sealant elasticity, etc., and achieve the preparation process Simple and environmentally friendly, with high bonding strength and good weather resistance

Active Publication Date: 2016-01-13
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 scheme of modified silane sealant, the elasticity of the sealant is average, which cannot meet the high requirements for sealing and anti-vibration of components, joints and other parts in industries such as vehicles and elevators.

Method used

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  • High-elasticity silane-terminated polypropylene oxide sealant and preparation method thereof
  • High-elasticity silane-terminated polypropylene oxide sealant and preparation method thereof

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preparation example Construction

[0044] Corresponding to the above formula system, a preparation method of a highly elastic silane-terminated polypropylene oxide sealant comprises the following steps:

[0045] (1) Mix silane-terminated polypropylene oxide polymer, diluent, calcium carbonate, carbon black, thixotropic agent, light stabilizer, and antioxidant at 80-120°C and 0.085-0.095MPa vacuum, And maintain the above mixing conditions for 2~6 hours;

[0046] (2) After reducing the temperature of the mixture obtained in the previous step to below 50°C, add the dehydrating agent, adhesion promoter, and catalyst, and mix evenly under a gas protection atmosphere;

[0047] (3) Discharge, sealed and packaged according to specifications.

[0048] Preferably, the protective atmosphere is one of nitrogen, helium, neon, argon, krypton, and carbon dioxide, more preferably, nitrogen.

[0049] The present invention will be further described below in conjunction with specific implementation examples:

Embodiment 1

[0051] (1) 100 parts by mass of dimethoxysilyl-terminated polypropylene oxide with a viscosity of 13 Pa·s (atmospheric pressure and a temperature of 25°C, the same below), 40 parts by mass of poly(propylene oxide) with a molecular weight of 3000 Polyoxypropylene glycol, 70 parts by mass of light calcium carbonate, 70 parts by mass of heavy calcium carbonate, 10 parts by mass of carbon black, 5 parts by mass of PAMIDD680, 1 part by mass of 2-(2-hydroxyl-3,5-dibutyl-tert-phenylbenzene base)-5-chlorobenzotriazole, 1 mass part 2,6-di-tert-butyl-4-methyl phenol Mix evenly at 120°C and 0.085MPa vacuum, and maintain the above mixing conditions for 2 hours;

[0052] (2) After reducing the temperature of the mixture obtained in the previous step to below 50°C, add 4 parts by mass of vinyltrimethoxysilane, 2 parts by mass of N-(β-aminoethyl)-γ-aminopropyltrimethoxy The reaction product of base silane, 1 mass part of γ-aminopropyltrimethoxysilane, 1 mass part of tetraethyl orthosilicat...

Embodiment 2

[0055] (1) 100 parts by mass of diethoxysilyl-terminated polypropylene oxide with a viscosity of 18 Pa·s, 60 parts by mass of polyoxypropylene glycol with a molecular weight of 3000, 50 parts by mass of light calcium carbonate, 50 parts by mass Parts by mass of heavy calcium carbonate, 40 parts by mass of carbon black, 8 parts by mass of CrayvallacSL, 2 parts by mass of 2-(2-hydroxyl-3,5-dibutyl-tert-phenyl)-5-chlorobenzotriazole, 1.5 parts by mass Bis(3,5-di-tert-butyl-4-hydroxyphenyl)sulfide was mixed uniformly at 80°C and 0.095MPa vacuum, and the above mixing conditions were maintained for 6 hours;

[0056] (2) After reducing the temperature of the mixture obtained in the previous step to below 50°C, add 1 mass part of vinyltriethoxysilane, 2 mass parts of γ-(2,3-epoxypropoxy)propyltrimethoxy Base silane, 3 parts by mass of γ-aminopropyltrimethoxysilane, and 3 parts by mass of dibutyltin dilaurate are uniformly mixed under an inert gas nitrogen protective atmosphere;

[00...

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Abstract

The invention discloses a high-elasticity silane-terminated polypropylene oxide sealant and a preparation method thereof. The sealant is prepared from the raw materials of silane-terminated polypropylene oxide polymer, a diluting agent, calcium carbonate, carbon black, a thixotropic agent, a light stabilizer, an antioxidant, a dehydrating agent, an adhesion promoter, and a catalyst. The preparation method of the high-elasticity silane-terminated polypropylene oxide sealant comprises the following steps: (1) the silane-terminated polypropylene oxide polymer, the diluting agent, calcium carbonate, carbon black, the thixotropic agent, the light stabilizer and the antioxidant are well mixed under a temperature of 80-120 DEG C and a vacuum degree of 0.085-0.095MPa; and the above mixing conditions are maintained for 2-6h; (2) the temperature of the mixed material obtained in the above step is reduced to below 50 DEG C; the diluting agent, the adhesion promoter and the catalyst are added; the materials are well mixed under a protective gas atmosphere; and (3) the obtained material is discharged and packaged in a sealed manner according to certain specifications. The sealant provided by the invention has good performances. The preparation process is simple and environment-friendly.

Description

technical field [0001] The invention relates to a highly elastic silane-terminated polypropylene oxide sealant and a preparation method thereof. Background technique [0002] Elastic 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. One-component moisture-curing silane-terminated polypropylene oxide sealant is an environmentally friendly modified silane sealant. During the promotion and application process, it was found that its comprehensive perform...

Claims

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Application Information

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IPC IPC(8): C09J171/02C09J11/04C09J11/08C09J11/06
Inventor 李吉明薛纪东钟汉荣
Owner GUANGZHOU MECHANICAL ENG RES INST
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