Instant-sealing silicone sealant and preparation method thereof

A technology of silicone glue and base silane, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of reducing the production and assembly efficiency of mechanical parts, affecting the production continuity, etc., and achieving excellent affinity , save process, improve the effect of thixotropy

Active Publication Date: 2016-11-23
山东汉斯曼高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This seriously affects the continuity of production and reduce

Method used

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  • Instant-sealing silicone sealant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] An instant sealing silicone glue, which is composed of the following components in weight percentage: 29.5% hydroxyl-terminated polydimethylsiloxane (20000cp viscosity), 21% hydroxyl-terminated polydimethylsiloxane (3000cp viscosity), 38.5% nano-calcium carbonate, 5.4% methyl tributylketoxime silane, 1.0% vinyl tributylketoxime silane, 4.45% meteorological silica, 0.05% hexamethyl Disilazane, 0.05% of dibutyltin dilaurate and 0.05% of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0026] The preparation method is as follows, based on the percentage of the total weight of the instant sealing silicone glue to be prepared:

[0027] (1) Add 29.5% hydroxyl-terminated polydimethylsiloxane (20000cp) and 21%% hydroxyl-terminated polydimethylsiloxane (3000cp) into the reactor, heat up to 110°C and stir in vacuum for 3 hours;

[0028] (2) Cool down to below 50°C, put 38.5% nano-calcium carbonate into the reactor, and stir in vacuum for 40 minutes;

[0029] (3) Continue to co...

Embodiment 2

[0035] An instant sealing silicone glue, which is composed of the following components in weight percentage: 31.5% hydroxyl-terminated polydimethylsiloxane (20000cp viscosity), 21% hydroxyl-terminated polydimethylsiloxane (3000cp viscosity), 36.5% nano-calcium carbonate, 4.6% methyl tributylketoxime silane, 2.0% vinyl tributylketoxime silane, 4.25% meteorological silica, 0.05% hexamethyl Disilazane, 0.04% of dibutyltin dilaurate and 0.06% of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0036] The preparation method is as follows, based on the percentage of the total weight of the instant sealing silicone glue to be prepared:

[0037] (1) Add 31.5% hydroxyl-terminated polydimethylsiloxane (20000cp) and 21% hydroxyl-terminated polydimethylsiloxane (3000cp) to the reactor, heat up to 110°C and stir in vacuum for 3 hours;

[0038] (2) Cool down to below 50°C, put 36.5% nano-calcium carbonate into the reactor, and stir in vacuum for 40 minutes;

[0039] (3) Continue to cool ...

Embodiment 3

[0042] An instant sealing silicone glue, which is composed of the following components in weight percentage: 28% hydroxyl-terminated polydimethylsiloxane (20000cp viscosity), 23.5% hydroxyl-terminated polydimethylsiloxane (3000cp viscosity), 39.2% nanometer calcium carbonate, 4.5% methyl tributylketoxime silane, 1.0% vinyl tributylketoxime silane, 3.65% meteorological silica, 0.05% hexamethyl Disilazane, 0.04% of dibutyltin dilaurate and 0.05% of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0043] The preparation method is as follows, based on the percentage of the total weight of the instant sealing silicone glue to be prepared:

[0044] (1) Add 32% hydroxyl-terminated polydimethylsiloxane (20000cp) and 23.5% hydroxyl-terminated polydimethylsiloxane (3000cp) into the reactor, heat up to 110°C and stir in vacuum for 3 hours;

[0045] (2) Cool down to below 50°C, put 39.2% nano-calcium carbonate into the reactor, and stir in vacuum for 40 minutes;

[0046] (3) Continue t...

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Abstract

The invention belongs to the technical field of a high polymer material and a preparation method thereof, and especially relates to an instant-sealing silicone sealant and a preparation method thereof, and the instant-sealing silicone sealant comprises the following components by weight: 28 to 32% of hydroxyl-terminated polydimethylsiloxane(20000cp), 20 to 24% of hydroxyl-terminated polydimethylsiloxane(3000cp), 35 to 40% of nano calcium carbonate, 4.0 to 6.0% of methyl-tri-(butanone-oxime)silane, 1.0 to 2.0% of vinyl-tri-(butanone-oxime)silane, 3.0 to 5.0% of fumed silica, 0.03 to 0.06% of hexamethyl-disilazane, 0.03 to 0.06% of dibutyltin dilaurate and 0.03 to 0.06% of N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane. The instant-sealing silicone sealant has the advantages of being fast to cure, instant to seal, environmental-friendly, conserving and non-solvent, and has the characteristics of excellent thixotropy, aging resistance, ultraviolet resistance and the like. The instant-sealing silicone sealant can be widely applied to instant sealing of railway vehicles and automobile mechanical parts, quick bonding and sealing of lamp materials, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and their preparation, and in particular relates to an instant sealing silicone sealant and a preparation method thereof. Background technique [0002] One-component silicone sealant is a paste-like polymer material that cures into a tough rubber-like solid when exposed to moisture in the air. Silicone glue has strong adhesion, good sealing performance, and at the same time has the characteristics of weather resistance, vibration resistance, moisture resistance, odor resistance and adaptability to large changes in cold and heat. Coupled with its wider applicability, it can realize the sealing of most construction machinery parts and the bonding between building materials, so the application value is very large [0003] Silicone sealant does not flow under its own weight, so it can be used in overhead or sidewall joints without sagging, collapsing or flowing away. It is primarily used f...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/04C09J11/06
Inventor 亓书英杨士勇于虎
Owner 山东汉斯曼高分子材料有限公司
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