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High-temperature-resistant sealing agent and preparation method and application thereof

A sealing agent, high temperature resistant technology, used in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of affecting the sealing effect, difficult to use the sealing agent, yellowing and chalking, etc., to improve the anti-oxidation performance, good Salt spray corrosion resistance and thermal weight loss reduction effect

Active Publication Date: 2019-03-19
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional sealing agent uses epoxy resin or acrylic resin. Although it can achieve a good sealing effect, epoxy resin has poor environmental resistance. It will seriously yellow and pulverize when used in marine environment for a long time, which will seriously affect its sealing. Effect
Although acrylic resin has good weather resistance, its temperature resistance is poor, so it cannot be used in high temperature environments with temperatures higher than 500 °C
At present, epoxy silicone should be difficult to be applied in the field of sealant because it is difficult to cure under 15°C.

Method used

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  • High-temperature-resistant sealing agent and preparation method and application thereof
  • High-temperature-resistant sealing agent and preparation method and application thereof
  • High-temperature-resistant sealing agent and preparation method and application thereof

Examples

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preparation example Construction

[0057] Wherein, the preparation method of described epoxy silicone resin comprises:

[0058] Mix 100 parts by mass of epoxy resin and 90-110 parts by mass of xylene, dissolve at 80-100°C for 2-3 hours, then add 35-45 parts by mass of organosilicon intermediate and 1-3 parts by mass of isopropyl titanate, Raise the temperature to 130-140°C and react for 4-5h until the solution is clear and transparent. The molecular structure of the organosilicon intermediate is shown in formula (2):

[0059]

[0060] Among them, n=10-15.

[0061] The epoxy silicone resin prepared by the method provided in the embodiment of the present invention has a heat resistance of over 600° C. and an ultraviolet radiation resistance of over 500 h.

[0062]The preferred BYK company BYK358 of the polyphosphoric acid leveling agent; the BYK320 of the preferred BYK company of the modified silicone leveling agent; the preferred 220 of the ultraviolet light stabilizer BYK company of Germany; the preferred ...

Embodiment 1

[0074] An embodiment of the present invention provides a high temperature resistant sealant, the preparation method of which comprises the following steps:

[0075] (1) Add 100g of Baling Petrochemical CYD011 epoxy resin to the reactor, 100g of xylene, dissolve at 90°C for 3h, then add 40g of the organosilicon intermediate shown in formula (2) (n=9-14, Purchased from Dow Corning DC6030), 2g of isopropyl titanate, heated to 130°C, reacted for 4h, until the solution was clear and transparent, and epoxy silicone resin was obtained.

[0076] (2) Add 100g of epoxy silicone resin, 2g of BYK358, 2g of BYK320, 2g of light stabilizer 9061, 2g of light stabilizer 220, and 100g of xylene into the stirring tank, and stir for 30min at 400 rpm to obtain epoxy silicone varnish .

[0077] (3) 100 g of epoxy silicone varnish and 100 g of curing agent (n=9-14, purchased from Dow Corning 6040) having the structural formula shown in formula (1) were uniformly mixed to obtain a sealing agent.

...

Embodiment 2

[0082] An embodiment of the present invention provides a high temperature resistant sealant, the preparation method of which comprises the following steps:

[0083] Add 100g Baling Petrochemical CYD011 epoxy resin to the reaction kettle, 90g xylene, dissolve at 90°C for 3h, then add 35g of the organosilicon intermediate shown in formula (2) (n=9-14, purchased from Dow Corning DC6030 ), 1g of isopropyl titanate, heated up to 130°C, and reacted for 4h until the solution was clear and transparent to obtain epoxy silicone resin.

[0084] Add 100g of epoxy silicone resin, 1.5g of BYK358, 1.5g of BYK320, 1.5g of light stabilizer 9061, 1.5g of light stabilizer 220, and 90g of toluene into the stirring tank, and stir at 400 rpm for 30 minutes to prepare epoxy silicone varnish .

[0085] Mix evenly 100 g of epoxy silicone varnish with 90 g of curing agent (purchased from Dow Corning 6040) with the structural formula shown in formula (1) to obtain a sealer.

[0086] It is applied on t...

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Abstract

The invention discloses a high-temperature-resistant sealing agent and a preparation method and application thereof and belongs to the field of thermal protection coatings. The high-temperature-resistant sealing agent is made from, by mass, 100 parts of epoxy organosilicon varnish and 90-110 parts of amino silicone oil curing agent. The high-temperature-resistant sealing agent can be applied to aluminum-clad alumina coating surface to evidently improve its resistance to salt spray corrosion; after 192 hours of alternating salt spray test, a base material is never corroded; the high-temperature-resistant sealing agent can also be applied to zirconia coating surface to improve its oxidation resistance; after three times of room temperature to 1000 DEG C thermal shock, zirconia coating neverpeels off.

Description

technical field [0001] The invention relates to a preparation method and application of an epoxy organosilicon high-temperature-resistant sealing agent, which can be applied to the surface of a ceramic-based coating to improve its anti-oxidation and anti-corrosion capabilities, and belongs to the field of thermal protection coatings. Background technique [0002] Ceramic-based coatings have the advantages of high temperature resistance and strong adhesion, and can be used as thermal barrier coatings on the surface of metal substrates to achieve thermal protection for the substrate. However, ceramic-based coatings often have a porous structure. In environments such as salt spray and humid heat, small molecules such as water vapor and inorganic salts can easily penetrate into the substrate through the pores of the ceramic-based coating, causing pitting corrosion of the metal substrate. As a result, the local bonding force between the ceramic-based coating and the substrate is ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/47C09D7/65C08G59/50
CPCC08G59/504C08K2003/329C09D5/08C09D5/18C09D163/00C09D7/47C09D7/65C08K3/32
Inventor 贺晨曾一兵任英李晨光马康智孙伟华
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH