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Modification method of xylene formaldehyde resin

A technology of xylene formaldehyde resin and phenolic resin, which is used in the modification of thermoplastic plasticizers and the modification of xylene formaldehyde resin, can solve problems such as inability to cure and form, and achieve reduced crosslinking density, high mechanical strength, high The effect of mechanical properties

Inactive Publication Date: 2013-06-12
KAILUAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to: provide a kind of environment friendly xylene formaldehyde resin modification method, it improves the modification process of xylene formaldehyde resin, to reduce the cost of product modification; characteristics, improve the defect that xylene formaldehyde resin cannot be cured and formed, and make the FRP products pressed by modified xylene formaldehyde resin very hard and tough; at the same time, use the good toughness of xylene formaldehyde resin to improve the phenolic resin Brittleness

Method used

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  • Modification method of xylene formaldehyde resin
  • Modification method of xylene formaldehyde resin
  • Modification method of xylene formaldehyde resin

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Phenol, formaldehyde and 0.075wt% methanesulfonic acid (calculated in xylene formaldehyde resin quality) join in the reactor with thermometer, stirring device and reflux condenser, and formaldehyde is that mass concentration is 37% formaldehyde aqueous solution, heating .To 80°C, react at constant temperature for 1 hour, then raise the temperature to 90°C, then react at constant temperature for 1 hour, then continue to heat up to 100°C, and react at constant temperature for 3 hours, then distill at atmospheric pressure, then heat up to 150°C and perform vacuum dehydration to obtain phenolic formaldehyde resin. Heat the obtained phenolic resin to 150° C., add xylene formaldehyde resin, and react at a constant temperature of 150° C. under vacuum for 1 hour to obtain a modified xylene formaldehyde resin.

Embodiment 2

[0032] Add xylene formaldehyde resin to a 1L 4-neck round bottom flask with stirring, water condenser, and thermocouple, then add a certain amount of phenol, and heat to 110°C. During the heating process, the viscosity of the mixture decreases, and the phenol gradually dissolves into xylene formaldehyde resin. 0.1 wt% p-toluenesulfonic acid (calculated based on the amount of xylene formaldehyde resin) was dissolved in 20% methanol solution, and then added to the above resin mixture. To prevent the temperature from rising, the catalyst was added dropwise. A few minutes after the addition of the catalyst, the water and formaldehyde solution began to reflux and the reaction temperature rose slightly due to the exotherm of the reaction. After the reaction started, the reaction temperature rose, and the reaction was carried out at 125° C. for about 45 minutes; after 45 minutes, the reaction temperature rose to 155° C., and the reaction was carried out at this temperature for 120 m...

Embodiment 3

[0034] Add quantitative xylene formaldehyde resin, hexanediol and 0.15wt% hydrochloric acid (calculated by xylene formaldehyde resin mass) into a 4-necked round-bottomed flask equipped with thermocouples, condenser tubes, etc., and heat to 110°C to boil and reflux to react For about 1 hour, cool down to 50°C; then add 37% formaldehyde solution, raise the temperature again to 110°C until boiling and reflux, and react for 1 hour; finally vacuumize and dehydrate. Add a small amount of curing agent hexamethylenetetramine to the obtained product, put it in an oven, heat cure at 140°C for 1 hour, and then cure at 160°C for 1 hour. After cooling, take it out and pulverize it, continue to dry for 3 hours, and cool to obtain the modified xylene formaldehyde resin.

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Abstract

The invention discloses a modification method of xylene formaldehyde resin. The xylene formaldehyde resin is taken as a raw material and two different implementation schemes are provided as follows: (1) firstly synthesizing phenolic resin from a hydroxyl compound and methanal under the action of an acid catalyst, and then adding the phenolic resin in the xylene formaldehyde resin, thereby obtaining the modified xylene formaldehyde resin; and (2) reacting the hydroxyl compound and the methanal with the xylene formaldehyde resin under the action of the acid catalyst, thus obtaining the modified xylene formaldehyde resin. According to the modification method, the characteristic that the phenolic resin can be hot pressed and solidified is utilized for overcoming the defect that the xylene formaldehyde resin can not be solidified; and the good toughness of the xylene formaldehyde resin is utilized for overcoming the fragility of the phenolic resin. The modification method is simple to operate and low in modified product cost.

Description

technical field [0001] The invention relates to a modification of a thermoplastic plasticizer, in particular to a modification method of a xylene formaldehyde resin, and belongs to the technical field of new polymer materials. Background technique [0002] Xylene formaldehyde resin has low volatility and can be used as a modifier for polymer plasticizers, synthetic resins, and synthetic materials. It can be modified with phenol, epoxy resin, acrylic acid, and maleic acid. The modified resin Widely used in water-soluble electrophoretic paint and industrial rubber, artificial leather and glass fiber reinforced plastics and other industries. [0003] In industry, xylene formaldehyde resin can replace dioctyl phthalate (DOP) or dibutyl phthalate (DBP) as the main plasticizer, which can play a role in plasticizing and toughening, and increase the bonding strength. Improve gloss and reduce costs. Xylene formaldehyde resin is compatible with various esters, and is easy to process...

Claims

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Application Information

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IPC IPC(8): C08G10/04
Inventor 王亚涛洪若瑜李建华金旺刘莉莉
Owner KAILUAN GRP
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