Design and preparation for controllable hydrophobic material

A technology of co-hydrolysis and silicone, applied in small raw hide/large raw hide/leather/fur treatment, tanning treatment, leather impregnation, etc., can solve the problem of enrichment, difficult to well reflect the hydrophobic properties of silicone materials, and restrict movement. and other problems, to achieve the effect of good adhesion, convenient production and low cost

Inactive Publication Date: 2007-11-14
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the two ends or the middle of the silicone chain are bonded and fixed, its movement is restricted and it cannot be enriched on the surface, so it is difficult to reflect the hydrophobic properties of the silicone material well.

Method used

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  • Design and preparation for controllable hydrophobic material
  • Design and preparation for controllable hydrophobic material
  • Design and preparation for controllable hydrophobic material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0062] Mix 100ml of toluene and 150ml of water into a 500ml flask, then take 80g of trimethylchlorosilane and 20g of methyldichlorosilane into the dropping funnel, keep the temperature below 25°C, stir, and add the mixed monomers dropwise. After the dropwise addition, pour the toluene aqueous solution into a separatory funnel, let stand, separate layers, remove the water layer, and then wash with water three times. Then add 30g of concentrated sulfuric acid, catalytic reforming at 35°C for 6 hours, then pour the mixture into a separatory funnel, let stand, separate layers, and remove the acidic water layer. Add about 0.5% mass fraction of activated carbon, stir, heat, after 30 minutes, let stand, separate layers, and remove the activated carbon. Neutralize with water and wash until the solution is neutral. Then use an oil pump to carry out vacuum distillation to collect the colorless silicon hydrogen reagent I.

[0063] It can be seen from Fig. 1 that there are mainly two gr...

example 2

[0065] Mix 100ml of toluene and 150ml of water into a 500ml flask, then take 50g of trimethylchlorosilane, 30g of diphenyldichlorosilane and 20g of methyldichlorosilane into the dropping funnel, and control the temperature below 25°C. Stir and add the mixed monomers dropwise. After the dropwise addition, transfer the mixed solution into a separatory funnel, let stand, separate layers, remove the water layer, and then wash with water three times. Slowly add 30 g of concentrated sulfuric acid, and carry out catalytic reforming at 35° C. for 6 hours, then pour the mixture into a separatory funnel, let stand, separate layers, and remove the acid layer. Add about 0.5% mass fraction of activated carbon, stir and heat, and after about 30 minutes, let stand and separate layers to deactivate the carbon. Neutralize with water and wash until the toluene solution is neutral. Finally, carry out vacuum distillation with an oil pump to collect colorless silicon hydrogen reagent.

example 3

[0067] Take by weighing the product of 12.5g example 1, put into and be equipped with mechanical stirrer, N 2 Add 5 drops of isopropanol solution containing 1% chloroplatinic acid to the four-neck flask with gas inlet, dropping funnel, and condenser tube, 2 Under air protection, stir to make it evenly mixed. Then take 6.3g of allyl methacrylate and measure it into the dropping funnel. Control the temperature in a water bath at 70°C, stir, and pass in N 2 Gas, then slowly add allyl methacrylate dropwise. After the dropwise addition, the temperature was raised to 90°C, the reaction was continued for 6h, and cooled. A colorless and transparent oily liquid was obtained.

[0068] It can be seen from Fig. 2 that the hydrogen peak Si-H at 4.6575-4.7127ppm disappears, and CH appears at 6.093-6.1294, 5.5304-5.6101, 4.0689-4.1145, 1.6660 and 1.9196-1.9474ppm respectively 2 =C(CH 3 )-, O-CH 2 -, O-CH 2 -CH 2 and CH 2 =C(CH 3 )-peaks. without CH 2 = The peak of CH, which show...

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Abstract

The present invention relates to a method that synthesizes the silicone prepolymer containing double bond and various chain segments, in sequence, by the cohydrolysis of silane containing hydrogen, silane containing chloro and alkoxy silane, and the reaction with allyl compounds under catalytic agent. The prepolymer will be copolymerized with (meth)acrylate to acquire the surface hydrophobic strength- controllable silicone modified acrylic resin composite. The composite is water soluble, and has good adhesion, gloss, softness, hydrophobicity and weatherability; it is regulable for the hydrophobic, antifouling and scrubbing resistant abilities of the composite surface, according to demands. Moreover, the product is simple in its production process, low in its cost, and very friendly to environment, which can be used in various fields such as leather, textile, construction and ship.

Description

technical field [0001] The invention relates to the synthesis of an organosilicon prepolymer containing a double bond, and the preparation technology for obtaining an organosilicon-acrylic resin composite material with controllable surface hydrophobic strength by using it to copolymerize with (meth)acrylic acid and its esters . Background technique [0002] Silicone monomers and their polymers have low surface tension, low glass transition temperature, good water resistance, temperature resistance, weather resistance and other properties. These superior properties have laid the foundation for their application in polymer material science. However, its further application is limited due to its high cost, poor adhesion and film-forming properties. Acrylic resin has the advantages of superior (ozone) oxygen resistance, oil resistance, adhesion, and many monomers, easy synthesis and low price, but the performance of acrylic resin such as temperature resistance, water resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/50C08G77/20C14C9/00C14C3/22D06M15/643
Inventor 刘白玲张保坦陈华林邓小波罗蓉
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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