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Methyl methacrylate modified silicon resin coating and preparation method thereof

A technology of methyl methacrylate and modified resin, applied in coatings and other directions, can solve the problems of general silicone resin adhesion performance, poor mechanical properties and anti-corrosion requirements, affecting thermal protection performance, etc., to speed up the coating process. Curing speed, stable product performance, anti-pollution effect

Inactive Publication Date: 2017-04-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of pure silicone resin after curing are not very good to meet the anti-corrosion requirements. The hardness is high but brittle, and the flexibility is poor. Moreover, the adhesive performance of silicone resin is average, and the prepared coating is easy to fall off, affecting its Exercising thermal protection performance

Method used

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  • Methyl methacrylate modified silicon resin coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Synthesis of addition products: Add 67.43g of trimethoxysilane, 101.354g of toluene and 0.926g of platinum catalyst solution into a 500ml three-necked flask equipped with a reflux condenser, a thermometer and a magnet, and raise the temperature to 60°C. Add 50.06 g of methyl methacrylate dropwise into the liquid funnel, react for 1 hour, then raise the temperature to 85°C, react for 2 hours and then lower the temperature to below 40°C and carry out vacuum distillation to 120°C to obtain the addition product.

[0040] The molar ratio of trimethoxysilane to toluene is 1:2, and the molar ratio of methyl methacrylate is 1.1:1; the amount of chloroplatinic acid is the sum of the mass of trimethoxysilane and methyl methacrylate (50-100)* 10 -6 ;

[0041] Synthesis of modified resin (5% addition product, mole fraction): put 11.12g of addition product, 61.30g of methyltrimethoxysilane, and 99.15g of phenyltrimethoxysilane into a three-necked bottle, drop 8.74g Water and an ap...

Embodiment 2

[0047] Synthesis of addition products: Add 153.25g of trimethoxysilane, 92.14g of toluene and 1.996g of platinum catalyst solution into a 500ml three-necked flask equipped with a reflux condenser, a thermometer and a magnet, and raise the temperature to 60°C. Add 100.12 g of methyl methacrylate dropwise into the liquid funnel, react for 1 hour, then raise the temperature to 85°C, react for 2 hours and then lower the temperature to below 40°C and carry out vacuum distillation to 120°C to obtain the addition product. The molar ratio of trimethoxysilane to toluene is 1:1, and the molar ratio of methyl methacrylate is 1.25:1; the amount of chloroplatinic acid is the sum of the mass of trimethoxysilane and methyl methacrylate (50-100)* 10 -6 ;

[0048] Synthesis of modified resin (10% addition product, mole fraction): put 9g of addition product, 22.08g of methyltrimethoxysilane, and 40.125g of phenyltrimethoxysilane into a three-necked bottle, drop 8.735g of water , and add an ap...

Embodiment 3

[0055] Addition product synthesis and equipment are as above;

[0056] Synthesis of modified resin (20% addition product, mole fraction): put 22.24g of addition product, 20.433g of methyltrimethoxysilane, and 49.57g of phenyltrimethoxysilane into a three-necked bottle, drop 9g of water , and add an appropriate amount of hydrochloric acid as a catalyst (keep the drop rate of 1-2 seconds per drop); hydrolyze at room temperature (30°C) for one hour; raise the temperature to 60°C, and react for 2 hours; after the condensation is completed, change the distillation device and heat up to 85°C. The product methanol is distilled out (about three hours), and a certain amount of petroleum ether is added after the reaction is complete, so that the mass fraction of the resin is 90%.

[0057] Synthetic silicone oil: put 91.15g of methylphenyldimethoxysilane into a three-necked bottle, drop in 9g of water, and add an appropriate amount of hydrochloric acid as a catalyst (keep the water drop ...

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Abstract

The invention provides a methyl methacrylate modified silicon resin coating. A preparation method of the methyl methacrylate modified silicon resin coating comprises the following steps: making trimethoxy silane and methyl methacrylate undergo hydrosilylation, and hydrolyzing and condensing an additive product containing an acrylic ester structure with methyltrimethoxysilane and phenyltrimethoxysilane to prepare modified organic silicon resin; hydrolyzing and condensing dimethoxymethylphenylsilane to prepare silicon oil, and mixing the resin and the silicon oil to prepare a coating. The preparation method is simple in process, convenient for operation and control, and stable in product performance; the hardness, flexibility and adhesion of the resin are improved; petroleum ether having low toxicity is adopted, so that the influence on the health of operating personnel can be lowered, and pollution on the environment can be prevented; on the aspect of coupling agents, compared with a monoamino coupling agent, a dual-ammonia silane coupling agent has the advantages that the adhesive force between an organic material and an inorganic substrate can be enhanced, curing of silane can be facilitated in a short time, and the curing speed of the coating is increased.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a methyl methacrylate modified silicone resin coating and a preparation method thereof. Background technique [0002] Silicone resin is a kind of high-temperature resistant and anti-corrosion coating developed in the 1970s. It is a general term for a class of polymers composed of silicon atoms and oxygen atoms alternately linked to form a skeleton, and different organic groups are connected to silicon atoms. Silicone resins can basically be divided into three categories: polyalkyl silicone resins, polyaryl silicone resins, and polyalkylaryl silicone resins. Polyalkyl silicone resin is a polyalkyl silicone resin with a network structure made of raw materials that only connect two or less alkyl groups to each silicon atom; polyaryl silicone resin is a siloxane chain containing only phenyl groups Copolymer; polyalkylaryl silicone resin is the raw material of the above two resins through hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D183/04C09D7/12C09D7/00C08G77/14
CPCC08G77/14C08L2205/02C09D7/20C09D7/63C09D183/06C08L83/04C08K5/544
Inventor 黄荣华甘启茂廉艳媛肖婷婷杨伟光王莉
Owner WUHAN UNIV
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