A kind of preparation method of anti-aging sealant for automobile

An aging-resistant and sealant technology, applied in the field of composite materials, can solve the problems of poor high temperature and aging resistance, short service life, etc., and achieve the effect of stable performance and high synthesis rate

Active Publication Date: 2019-05-17
安徽雅达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the sealant currently on the market has better sealing performance, its high temperature resistance and aging resistance are relatively poor, and its service life is relatively short.

Method used

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  • A kind of preparation method of anti-aging sealant for automobile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of anti-aging sealant for automobiles, comprising the following steps:

[0026] (1) At -60°C, using methyl chloride as a solvent, isobutylene as the first monomer, p-methylstyrene as the second monomer, and aging and complexing with HCl and aluminum trichloride for 30 minutes to obtain Initiate the system, and add n-propanol or monoethanolamine as the third component, the third component is added to the reactor along with the polymerized monomer when the monomer is fed, and the cationic slurry copolymerization is carried out for 40 hours to obtain poly Isobutylene-based random copolymer; wherein, in the reaction system, the total mass concentration of isobutylene and p-methylstyrene is 45wt%, and the mass ratio of isobutylene and p-methylstyrene is 2.5:1; n-propanol or monoethanolamine The concentration is 1×10 - 6 mol / L; the molar ratio of n-propanol or monoethanolamine to aluminum chloride is 18:1, and the molar ratio of HCl to aluminum chloride...

Embodiment 2

[0031] A preparation method of anti-aging sealant for automobiles, comprising the following steps:

[0032] (1) At -100°C, using methyl chloride as a solvent, isobutylene as the first monomer, and o-methylstyrene as the second monomer, aging and complexing with water and alkyl aluminum chloride for 5 minutes to prepare The initiation system is obtained, and isobutanol or diethanolamine is added as the third component. When the monomer is fed, the third component is added to the reactor along with the polymerized monomer, and is copolymerized by cationic slurry for 40 hours to obtain Polyisobutylene-based random copolymer; wherein, in the reaction system, the total mass concentration of isobutylene and o-methylstyrene is 10wt%, and the mass ratio of isobutylene and o-methylstyrene is 0.5:1; isobutanol or diethanolamine The concentration is 1×10 -2 mol / L; the molar ratio of isobutanol or diethanolamine to alkyl aluminum chloride is 6:1, and the molar ratio of water to alkyl alu...

Embodiment 3

[0037] A preparation method of anti-aging sealant for automobiles, comprising the following steps:

[0038](1) At -70°C, with methyl chloride as the solvent, isobutylene as the first monomer, and m-ethylstyrene as the second monomer, dicyclohexylcarbodiimide and alkylaluminum chloride are used to Compounding for 10 minutes to prepare the initiation system, and adding isopropanol or diethanolamine as the third component, the third component is added to the reactor along with the polymerized monomer when the monomer is fed, and is co-polymerized by cationic slurry. Polymerize for 50 hours to obtain a polyisobutylene-based random copolymer; wherein, in the reaction system, the total mass concentration of isobutylene and m-ethylstyrene is 15 wt%, and the mass ratio of isobutylene and m-ethylstyrene is 0.9:1; The concentration of isopropanol or diethanolamine is 1 x 10 -3 mol / L; the molar ratio of isopropanol or diethanolamine to alkyl aluminum chloride is 10:1, and the molar rati...

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Abstract

The invention discloses a preparation method of an aging-resistant sealant for automobiles. The method includes the following steps that firstly, a polyisobutenyl random copolymer is prepared; then, nano-filler of a core-shell structure with nano-titanium oxide wrapping nano-silicon dioxide is prepared; finally, the obtained polyisobutenyl random copolymer, butyl rubber and ethylene propylene diene monomer are mixed and added into an internal mixer, and internal mixing is conducted for 30-60 min at 160-170 DEG C; the temperature is reduced to 130-135 DEG C, carbon-5 petroleum resin, naphthenic oil and plasticizer are added into the internal mixer, and internal mixing is conducted for 10-30 min; the temperature is reduced to 100-115 DEG C, the obtained nano-filler, calcium carbonate and bis(P,P-bis-ethylhexyl diphosphato)ethanediolato titanate are added into the internal mixer, and internal mixing is conducted for 45-70 min; the temperature is reduced to the room temperature, stirring and mixing are conducted for 1-2 h, and the aging-resistant sealant for automobiles is obtained. The sealant is good in mechanical property and excellent in wear resistance and aging resistance.

Description

Technical field: [0001] The invention relates to the field of composite materials, in particular to a method for preparing an aging-resistant sealant for automobiles. Background technique: [0002] With the continuous development of the economy and the rapid development of the automobile industry, there are higher requirements for automobile interior decoration and other aspects. Due to its excellent performance, sealants are widely used in the sealing and adhesion of automobiles, and gradually become a An irreplaceable product with unlimited development potential. [0003] Sealants are also called liquid gaskets. Compared with solid seals (such as steel gaskets, paper gaskets, etc.), they have the advantages of convenient use and good sealing performance, so they are widely used in the automotive industry. However, although the sealants currently on the market have better sealing properties, their high temperature and aging resistance properties are relatively poor, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/22C08L23/16C08K13/06C08K9/10C08K3/36C08K3/22C08K3/26
CPCC08K2201/011C08L23/22C08L2201/08C08L2205/025C08L2205/035C08L23/16C08K13/06C08K9/10C08K3/36C08K2003/2241C08K2003/265
Inventor 王海燕
Owner 安徽雅达科技有限公司
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