Silicane modified polyurethane sealant used for automobile and preparing method thereof

A polyurethane sealant and silane modification technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of narrow selection range of mechanical properties, no mention of water resistance of materials, and inability to fully meet the needs of automobiles. Use sealant usage requirements and other issues to achieve excellent water resistance, excellent aging resistance, and improved mechanical properties

Active Publication Date: 2015-06-10
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the range of mechanical properties of the above patented silicone-modified polyurethane sealant products is relatively narrow, and cannot fully meet the requirements for the use of different parts of automotive sealants.
In addition, as mentioned earlier, waterproofing is one of the functions of automotive sealants, but in the existing patented technology of silane-modified polyurethane sealants, the water resistance of materials has not been mentioned yet.

Method used

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  • Silicane modified polyurethane sealant used for automobile and preparing method thereof
  • Silicane modified polyurethane sealant used for automobile and preparing method thereof
  • Silicane modified polyurethane sealant used for automobile and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 100 parts of triethoxysilane-terminated silane-modified polyurethane, 15 parts of diisodecyl phthalate, and 5 parts of dioctyl phthalate into a mixer, and stir at a temperature of 80 °C and a vacuum of 0.09 MPa Mix for 15 minutes; cool down to below 60°C, stop vacuuming and stirring, add 40 parts of calcium carbonate, 40 parts of titanium dioxide, 10 parts of carbon black, 10 parts of fumed silica, stir and mix for 40 minutes; add 80 parts of liquid butyl rubber parts, 20 parts of liquid isoprene rubber, 0.5 part of pentaerythritol tetramethylene β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, at a temperature of 120°C and a vacuum of 0.07MPa, Dehydrated and blended for 100 minutes; cooled to below 50°C, stopped vacuuming and stirring, and added 12 parts of vinyltrimethoxysilane, 3 parts of vinyltriethoxysilane, 1 part of ureidopropyltrimethoxysilane, and 2 parts of vinyltrimethoxysilane. 0.8 part of dibutyltin laurate and 0.2 part of stannous octoate were stirred...

Embodiment 2

[0042] Add 100 parts of trimethoxysilane-terminated silane-modified polyurethane, 50 parts of diisononyl phthalate, and 25 parts of dioctyl phthalate into a mixer, and stir and mix at a temperature of 80°C and a vacuum of 0.06 MPa 30 minutes; cool down to below 60°C, stop vacuuming and stirring, add 25 parts of calcium carbonate, 20 parts of talcum powder, 5 parts of fumed silica, stir and mix for 60 minutes; add 55 parts of liquid styrene-butadiene rubber, 2,6- 0.2 parts of di-tert-butyl-p-cresol, at a temperature of 100°C and a vacuum of 0.06MPa, dehydration and blending for 120 minutes; lower the temperature to below 50°C, stop vacuuming and stirring, add 5 parts of vinyltrimethoxysilane, aminopropyl 0.5 part of trimethoxysilane and 0.5 part of dibutyltin diacetate were stirred and mixed for 15 minutes under a vacuum of 0.09 MPa to obtain a silane-modified polyurethane sealant for automobiles. The test results of product performance are shown in Table 1.

Embodiment 3

[0044] Add 50 parts of trimethoxysilane-terminated silane-modified polyurethane, 50 parts of triethoxysilane-terminated silane-modified polyurethane, 50 parts of diisooctyl phthalate, and 50 parts of butylbenzyl phthalate In the mixer, stir and mix for 10 minutes at a temperature of 90°C and a vacuum of 0.08MPa; cool down to below 60°C, stop vacuuming and stirring, add 50 parts of carbon black, 50 parts of organic bentonite, 30 parts of titanium dioxide, and 30 parts of talc powder , 10 parts of fumed silica, stirred and mixed for 55 minutes; add 80 parts of liquid butyl rubber, 0.1 part of 2,6-di-tert-butyl-p-cresol, and 0.5 parts of 4,4`-di-tert-octyldiphenylamine, in Temperature 110°C, vacuum degree 0.09MPa, dehydration and blending for 60 minutes; cool down to below 50°C, stop vacuuming and stirring, add 10 parts of methyltrimethoxysilane, 10 parts of vinyltriethoxysilane, aminoethyl 1 part of aminopropyltrimethoxysilane, 0.5 part of tin dibutyldioctate, and 0.3 part of te...

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PUM

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Abstract

The invention discloses silicane modified polyurethane sealant used for an automobile and a preparing method thereof. Silicane modified polyurethane polymer, plasticizer, filling, reinforcing agents, cross-linking agents, thickening agents, catalytic agents and an antioxidant are used as raw materials. The preparing method includes the steps that firstly, the silicane modified polyurethane polymer and the plasticizer are evenly mixed at the temperature of 80 DEG C-90 DEG C under the vacuum degree of 0.06 MPa-0.09 MPa; then the filling is added, and stirring and mixing are performed evenly; then the reinforcing agents and the antioxidant are added, dehydrated and blended evenly at the temperature of 100 DEG C-120 DEG C under the vacuum degree of 0.06 MPa-0.09 MPa; finally, the cross-linking agents, the thickening agents and the catalytic agents are added and mixed evenly under the vacuum degree of 0.06 MPa-0.09 MPa to obtain the silicane modified polyurethane sealant used for the automobile. Compared with the same kind of materials, the silicane modified polyurethane sealant used for the automobile is wide in selection range of mechanical properties, and can be used for sealing and adhering of different component of the automobile according to different requirements; the water-resistant performance is excellent, and the safety of automobile operation is ensured; meanwhile, the sealant has excellent mechanical performance and adhesive performance, is resistant to aging, and can be widely applied to the field of automobile manufacturing.

Description

technical field [0001] Embodiments of the present invention relate to the field of polymer materials, and more particularly, embodiments of the present invention relate to a silane for automobiles prepared by hydrolysis of a crosslinking agent under moisture conditions and a crosslinking reaction with a silane-modified polyurethane. Modified polyurethane sealant and preparation method thereof. Background technique [0002] With the continuous advancement of science and technology, the automobile industry is gradually developing in the direction of safety and comfort, beautiful appearance, energy saving and environmental protection, and light weight. As one of the necessary materials in automobile manufacturing, the development and application of high-performance sealants are extremely important. [0003] Sealant is a material used to fill voids and seams. In the field of automobile manufacturing, it is mainly used for the bonding and sealing of windshields, lights, doors an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06C09J11/04C09J11/08
Inventor 毛俊轩黄强潘林车国勇熊婷王有治
Owner CHENGDU GUIBAO SCI & TECH
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