High-strength silane-modified polyether sealant for automobiles and preparation method thereof

A silane-modified polyether, high-strength technology, used in the field of sealants, can solve the problems of poor performance of mechanically modified silane-based structural adhesives, structural differences, and far-flung mechanical properties, etc., to achieve primerless adhesion. effect, high shear strength, improved construction process

Inactive Publication Date: 2018-11-06
GUANGZHOU JOINTAS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with PU structural adhesives, modified silane structural adhesives perform poorly in terms of mechanical properties
Patents CN104694065B, CN105199653A and CN107841277A all proposed the preparation technology of high-strength silane-modified polyurethane sealant, and the mechanical properties inherited the characteristics of polyurethane sealant, but there were obvious structural differences between the main structure and the silane-modified polyether proposed in this patent; Patents CN106987223A and CN107022333A both mention the preparation technology of high-strength silane-modified polyether sealant, but the mechanical properties of this technology are about 4MPa, which is far from the mechanical properties achieved by this patented technology

Method used

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  • High-strength silane-modified polyether sealant for automobiles and preparation method thereof
  • High-strength silane-modified polyether sealant for automobiles and preparation method thereof
  • High-strength silane-modified polyether sealant for automobiles and preparation method thereof

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preparation example Construction

[0034] The preparation method adopted in embodiment and comparative example comprises the following steps:

[0035] (1) Dry the reinforcing filler and reinforcing carbon black at 100°C for 3 hours, and set aside;

[0036] (2) Add silane-modified polyether resin, reinforcing filler, reinforcing carbon black and 40% water-removing agent in the planetary kettle in sequence, and disperse at high speed for 30-40 minutes;

[0037] (3) Add environment-friendly plasticizer, thixotropic agent, ultraviolet absorber, light stabilizer, antioxidant, first adhesion promoter, second adhesion promoter, adsorbent, 60% by mass of the dewatering agent and the catalyst are mixed uniformly, stirred for 20-40 minutes under the condition of a vacuum degree of -0.09MPa-0.1MPa, and the material is discharged.

[0038] It should be noted that the nano-activated carbon and its composite materials used in the examples of the present invention can be purchased from Shanghai Shuyu Chemical Co., Ltd.

[0...

Embodiment 1～12 and comparative example 1～5

[0046] Performance Testing

[0047] Test methods for tensile strength and elongation at break of sealants: refer to GB / T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber (type II dumbbells);

[0048] Test method for adhesiveness of sealant: refer to GB / T 13477.18-2002 Test Method for Building Sealing Materials Part 18: Determination of Peel Adhesion;

[0049] Test method for shear strength of sealant: refer to GB / T 7124-2008 Determination of tensile shear strength of adhesive (rigid material to rigid material);

[0050] Test method for curing speed of sealant: refer to QC / T 1024-2015 Determination of curing speed in Section 7.7 of one-component polyurethane sealant for automobiles

[0051] Test method of sealant odor level: refer to the determination method of VDA270.

[0052] Table 2 Test results of mechanical properties of silane-modified polyether sealant in each embodiment and comparative example

[0053]

[0054...

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Abstract

The invention belongs to the technical field of sealants and particularly relates to a high-strength silane-modified polyether sealant for automobiles and a preparation method thereof. The high-strength silane-modified polyether sealant for automobiles comprises, by weight, 25-60 parts of a silane-modified polyether resin, 5-20 parts of an environment-friendly plasticizer, 15-30 parts of a bulkingfiller, 10-30 parts of reinforcing carbon black, 0-1 part of a thixotropic agent, 0-1 part of a UV absorber, 0-1 part of a light stabilizer, 0-2 parts of an antioxidant, 0-4 parts of a water removalagent, 0.2-0.8 parts of an adsorbent, 0.1-4 parts of a curing accelerator, 0.1-2 parts of an adhesion promoter and 0-1 part of a catalyst. The high-strength silane-modified polyether sealant solves the problem that the traditional silane-modified polyether sealant has low mechanical properties, improves the complicated construction process of the polyurethane sealant for the traditional windshieldglass, realizes primerless bonding, solves the problem that the polyurethane sealant for the traditional windshield glass produces foam at a high temperature and high humidity and solves the problemthat the polyurethane sealant for the traditional windshield glass has poor environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of sealants, in particular to a high-strength silane-modified polyether sealant for automobiles and a preparation method thereof. Background technique [0002] With the improvement of automobile manufacturing technology level, the adoption of new materials and new technologies, and the improvement of customers' requirements for automobile economy and comfort, new varieties and new processes of sealants are more and more widely used in automobiles, and are used in shockproof , heat insulation, anti-corrosion, anti-rust, anti-leakage, reduce noise, reduce self-weight, improve the comfort and safety of the car, etc. have this special effect. In order to improve the safety of the car, ensure the safety of the occupants, and prevent the occupants from being injured due to the poor assembly of the window glass during sudden braking or collision during high-speed driving, the direct bonding process of the window gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06C09J11/08
CPCC08K2003/265C08K2201/011C09J11/04C09J11/06C09J11/08C09J171/00C08L71/00C08L77/00C08K13/04C08K3/26C08K3/36C08K7/24C08K3/04C08K5/544
Inventor 杨海兵李义博石正金
Owner GUANGZHOU JOINTAS CHEM
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