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Autocatalysis cross-linking organosilicon seal glue and method for making same

A cross-linked, silicone technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of high price and catalyst poisoning, and achieve the effect of fast curing speed, simplified manufacturing process and excellent performance

Inactive Publication Date: 2008-03-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Addition-type silicone sealants and adhesives use platinum-based catalysts, which are not only expensive, but also easily cause catalyst poisoning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 100 parts of α, ω-dihydroxy polydimethylsiloxane and 60 parts of nano-calcium carbonate at a vacuum degree of -0.095 and a temperature of 110° C., dehydrate in vacuum for 45 minutes, and cool to room temperature. The resulting mixed glue is ready for use.

[0019] Make a solution of 1.25 parts of n-butylaminomethyltriethoxysilane and 60 parts of n-hexane, stir and mix with the above-mentioned mixed glue for 15 minutes at room temperature and vacuum degree -0.095MPa, and pour the obtained sealant into a deep 4 The mechanical properties of the vulcanized rubber were measured according to the provisions of GB / T13477-1992 test methods for building sealing materials after curing at room temperature for 7 days in a polytetrafluoroethylene mold of mm.

[0020] Use 80×10×3mm PE and PP injection specimens whose surface has been roughened by a grinder, glue them together, and test the shear strength of the silicone sealant according to GB / T13477-92 Adhesive Tensile Shear Stren...

Embodiment 2

[0025] 1.38 parts of cyclohexylaminomethyltriethoxysilane was used as the crosslinking agent, and the rest were the same as in Application Example 1. The properties of the sealant are shown in Table 1.

Embodiment 3

[0027] 1.53 parts of di-n-butylaminomethyltriethoxysilane was used as the crosslinking agent, and the rest were the same as in Application Example 1. The properties of the sealant are shown in Table 1.

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PUM

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Abstract

The present invention discloses one kind of self-catalysis cross-linked silicone sealing glue and its preparation process. The self-catalysis cross-linked silicone sealing glue contains alpha, omega-dihydroxy polysiloxane as main component, alpha-amidomethyl trialkoxy silane as the cross-linking agent, stuffing and diluent. It has simple preparation process without need of added catalyst, fast curing speed, low cost and other advantages. It is suitable for adhering and sealing energy-saving lamp and vehicle lamp.

Description

technical field [0001] The invention relates to a self-catalyzed cross-linking silicone sealant and a manufacturing method thereof, which are suitable for bonding and sealing energy-saving lamps and vehicle lamps. Background technique [0002] At present, the condensation-type silicone sealants and adhesives widely used at home and abroad use organotin salts and titanium complexes, which have the disadvantages of high toxicity and vulcanization reduction at high temperatures. For example, patent ZL01107167.2 (neutral silicone sealant and its manufacturing method) uses dibutyltin dilaurate, dibutyltin diacetate or tin acetyl ethyl ester complex; ZL01803341.5 (organosiloxane composition) introduces The catalyst is the acetoacetate of titanium or zirconium. Addition silicone sealants and adhesives use platinum catalysts, which are not only expensive, but also prone to catalyst poisoning. Contents of the invention [0003] In order to solve the above problems, the object of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C09J183/04
Inventor 许家瑞尹以高张艺陈晓燕池振国
Owner SUN YAT SEN UNIV
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