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High-performance flame-retardant silane modified polyether sealant and preparation method thereof

A technology of silane-modified polyether and sealant, which is applied in the field of sealant, can solve the problems of poor compatibility of sealant matrix resin, reduce the mechanical properties of materials, destroy the atmospheric ozone layer, etc., achieve fast curing speed, reduce surface drying time, Ease of promotion and use

Active Publication Date: 2021-05-28
深圳市优力新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with people's increasing awareness of environmental protection and safety, there are two major problems in the current sealants: (1) The base material has high viscosity. In order to facilitate construction, a large amount of highly volatile organic solvents must be used as diluents to reduce Viscosity, which is not only harmful to human health, but also destroys the atmospheric ozone layer; (2) The curing speed of the base material at room temperature is slow. In order to improve the curing reaction speed, organotin compounds are usually used as catalysts to shorten the curing time of the glue. Highly toxic and harmful to the environment
However, the added flame retardant is easy to absorb moisture and has poor compatibility with the sealant matrix resin, and the mechanical properties of the material are reduced due to a large amount of addition

Method used

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  • High-performance flame-retardant silane modified polyether sealant and preparation method thereof
  • High-performance flame-retardant silane modified polyether sealant and preparation method thereof
  • High-performance flame-retardant silane modified polyether sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of polysiloxane comprises the steps:

[0034] (1) React γ-aminopropylmethyldiethoxysilane with deionized water (volume ratio 1:1) at 85°C for 4 hours to obtain aminosilane hydrolyzate, in which γ-aminopropylmethyldiethoxysilane The volume ratio of oxysilane to deionized water is 1:1;

[0035] (2) After dehydration of 12 parts by weight of aminosilane hydrolyzate obtained in step (1), with 94 parts by weight of octamethylcyclotetrasiloxane, 0.6 parts by weight of hexamethyldisiloxane and 0.1 parts by weight of potassium hydroxide React at 140°C for 5h to obtain polysiloxane.

Embodiment 1

[0037] The preparation of pine lingxin acid anhydride:

[0038] Take pinesinic acid and put it into a four-neck flask equipped with stirring, thermometer and nitrogen protection, and turn on the oil bath. Start nitrogen protection and heat to 260°C, and keep the temperature for 30min; slowly add maleic anhydride (the molar ratio to pinicine acid is 2:1) several times, and react at 260°C for 6h after feeding; the crude product Cool in ice water, pulverize and wash with deionized water several times to obtain a crude product, then dry and dissolve in glacial acetic acid, heat and reflux for 2 hours, recrystallize twice, finally wash with deionized water several times, and dry That's it. The conversion rate (yield) obtained by measuring the acid value was 86.9%.

[0039]For the polysiloxane modified with maleic anhydride, 12 parts by weight of maleic anhydride and 46 parts by weight of polysiloxane were reacted at 95° C. for 4.5 hours to obtain the modified polysiloxane.

[00...

Embodiment 2

[0046] The preparation of pine lingxin acid anhydride and modified polysiloxane is the same as in Example 1.

[0047] A high-performance flame-retardant silane-modified polyether sealant. The raw material components include: by weight, 112 parts of modified polysiloxane-terminated polyether, 108 parts of active nano-calcium carbonate, 30 parts of polypropylene glycol, 22 parts of flame retardant filler, 4 parts of vinyltrimethoxysilane, 13 parts of white carbon black, 3 parts of bisaminosilane and 0.8 parts of organic chelated tin catalyst. The apparent viscosity of polyether is 13600mPa·s; the flame retardant filler is an intumescent flame retardant, and the mass ratio of acid source, carbon source and gas source is 2:0.9:1.2; the acid source is melamine polyphosphate, and the carbon source It is phenolic resin (PF), and the gas source is melamine (M EL).

[0048] The preparation of a high-performance flame-retardant silane-modified polyether sealant is the same as in Exampl...

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Abstract

The invention discloses a high-performance flame-retardant silane modified polyether sealant and a preparation method thereof, and relates to the technical field of sealants. The preparation method of the sealant specifically comprises the following steps: S1, mixing the modified polysiloxane-terminated polyether, the plasticizer, the moisture scavenger, the calcium carbonate, the white carbon black and the flame-retardant filler to obtain a product A; s2, mixing the product A obtained in the step S1 with a tackifier, adding an organic chelated tin catalyst for reaction, and carrying out vacuum defoaming treatment, stirring, discharging and sealing to obtain the sealant. The sealant can maintain good mechanical properties while having excellent flame retardancy, has good elasticity, high adhesive property, good corrosion resistance, high curing speed, outstanding high temperature resistance and excellent product quality, and can be widely applied.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a high-performance flame-retardant silane-modified polyether sealant and a preparation method thereof. Background technique [0002] Sealant is a multi-functional bonding and sealing material that plays the role of bonding, caulking, and bearing the deformation and shrinkage stress of gaps or connections between different structures or substrates. Compared with traditional bolts and riveting, sealants are polymer elastomers with excellent bonding, good elasticity, light weight, high strength and strong corrosion resistance, and are widely used in construction, automobiles, machinery manufacturing, energy and electrical engineering, etc. Major engineering technology fields. However, with people's increasing awareness of environmental protection and safety, there are two major problems in the current sealants: (1) The base material has high viscosity. In order to faci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/12C09J11/04C09J11/06C09J11/08C08G77/46
CPCC08G77/46C08K2003/265C08K2003/323C08K2201/011C08L2201/02C09J11/04C09J11/06C09J11/08C09J183/12C08L71/02C08L61/06C08L5/16C08L3/02C08K5/3462C08K7/26C08K5/544C08K3/26C08K5/5425C08K13/04C08K3/32C08K5/06C08K5/3155C08K5/34928C08K5/34922C08K9/10C08K5/053
Inventor 曹政委
Owner 深圳市优力新材料科技有限公司
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