Preparation method of nano-silica rosin modified phenolic resin

A nano-silica, phenolic resin technology, applied in the field of phenolic resin preparation, can solve the problems of the softening point not meeting the requirements for use, the reaction is not easy to control, the product color is dark, etc., to achieve good viscosity, reduce reaction time, and high softening point. Effect

Active Publication Date: 2015-06-10
桂林兴松林化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing processes for producing rosin-modified phenolic resins have the disadvantages that the reaction is not easy to control, the products produced have dark colors, and the softening point does not meet the requirements for use, etc., and the free formaldehyde in the resin has not been controlled to the minimum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Put 110 parts by weight of xylenol, 200 parts by weight of tert-butylphenol, 100 parts by weight of p-dodecylphenol and 90 parts by weight of hydrogenated bisphenol A into the reactor in sequence, heat up to 60 ° C, stir for 10 minutes, and use The concentration is 1mol / L NaOH to adjust the pH to 7.5, then add 170 parts by weight of formaldehyde solution with a mass concentration of 60%, and add 1% polyvinyl alcohol at the same time, heat up to 85°C, keep the temperature for 200min, then cool down to 80°C, use NH with a concentration of 1mol / L 4 Adjust the pH to 6.5 with Cl, keep it for 100 minutes, stop heating, cool to room temperature, adjust the pH value to neutral, and discharge to obtain the condensation liquid;

[0024] (2) Put 800 parts by weight of rosin into the reactor, heat up to 180°C, wait for the melting to be complete, then heat up to 230°C, add 8 parts by weight of maleic acid, 10 parts by weight of propylene glycol, 50 parts by weight of neopentyl ...

Embodiment 2

[0028] (1) Put 127 parts by weight of xylenol, 188 parts by weight of tert-butylphenol, 150 parts by weight of p-dodecylphenol and 80 parts by weight of hydrogenated bisphenol A into the reactor in sequence, heat up to 63 ° C, stir for 9 minutes, and use The concentration is 1mol / L NaOH to adjust the pH to 7.6, then add 185 parts by weight of formaldehyde solution with a mass concentration of 70%, and add 2% polyvinyl alcohol at the same time, heat up to 87°C, keep the temperature for 180min, then cool down to 81°C, use NH with a concentration of 1mol / L 4 Cl adjusted the pH to 6.4, kept for 90 minutes, stopped heating, cooled to room temperature, adjusted the pH value to neutral, and discharged to obtain a condensation liquid;

[0029] (2) Put 850 parts by weight of rosin into the reaction kettle, heat up to 185° C., wait for the melting to be complete, then heat up to 233° C., according to 85 parts by weight of pentaerythritol and 0.2 parts by weight of sulfuric acid solution...

Embodiment 3

[0033](1) Put 145 parts by weight of xylenol, 175 parts by weight of tert-butylphenol, 200 parts by weight of p-dodecylphenol and 70 parts by weight of hydrogenated bisphenol A into the reactor in turn, heat up to 65 ° C, stir for 8 in, and use The concentration is 1mol / L NaOH to adjust the pH to 7.7, then add 200 parts by weight of formaldehyde solution with a mass concentration of 75%, and add 2% polyvinyl alcohol at the same time, heat up to 87°C, keep the temperature for 150min, then cool down to 83°C, use NH with a concentration of 1mol / L 4 Adjust the pH to 6.3 with Cl, keep it for 850 minutes, stop heating, cool to room temperature, adjust the pH value to neutral, and discharge to obtain the condensation liquid;

[0034] (2) Put 900 parts by weight of rosin into the reactor, heat up to 190°C, wait for the melting to be complete, then heat up to 235°C, add 12 parts by weight of maleic acid, 8 parts by weight of propylene glycol, 35 parts by weight of neopentyl glycol, 90...

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Abstract

The invention belongs to the technical field of preparation of phenolic resin, and in particular relates to a preparation method of nano-silica rosin modified phenolic resin. The method is that xylenol, tert-butylphenol, dodecyl-phenol, hydrogenated bisphenol A and formaldehyde are used as the raw materials; the weak-base and weak-acid process is carried out to prepare phenolic resin; rosin and nano-silica are utilized for modifying, so as to prepare the nano-silica rosin modified phenolic resin. The preparation method is simple in process; the prepared phenolic resin is high in viscosity, high in softening point, small in free formaldehyde content, high in heat resistance and corrosion resistance, suitable for industrial mass production, and applicable to preparation of coating and ink, and can be also used as adhesive and rubber components.

Description

technical field [0001] The invention belongs to the technical field of phenolic resin preparation, in particular to a preparation method of nano-silica rosin-modified phenolic resin. Background technique [0002] Phenolic resin is a general term for resins produced by the reaction of phenols and aldehydes in the presence of catalysts. Phenolic resin is the earliest industrialized synthetic resin in the world. , the production process and equipment are simple, and more importantly, its excellent mechanical properties, heat resistance, ablation resistance, electrical insulation, dimensional stability, molding processability and flame retardancy. The cured phenolic resin has good Physical and chemical properties, widely used in various aspects of industry, agriculture, national defense and national economy, etc., phenolic resin has become an indispensable material in the industrial sector. Phenolic resin is often used to make adhesive materials, friction materials, refractory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K3/36C08G8/34
Inventor 刘桂芳董林鑫刘川范辂
Owner 桂林兴松林化有限责任公司
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