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Improved process for producing alkylphenols thermoplastic resin

A production process and technology of thermoplastic resin, applied in the rubber field, can solve the problems of low yield, high resin production cost, large amount of formaldehyde aqueous solution, etc., and achieve the effect of improving economy

Active Publication Date: 2009-01-07
SINO LEGEND CHINA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the long reaction time and the large amount of formaldehyde aqueous solution lead to low yield per kettle, and the final result is high production cost of the resin

Method used

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  • Improved process for producing alkylphenols thermoplastic resin
  • Improved process for producing alkylphenols thermoplastic resin
  • Improved process for producing alkylphenols thermoplastic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Synthesis of p-tertoctylphenol (PTOP)-formaldehyde (F) resin, dodecylbenzenesulfonic acid as catalyst, PTOP: F (molar ratio) = 1: 0.78; LF: SF (molar ratio) = 49: 51; LF1: LF2 (mass ratio) ＝34∶66

[0068] In a 500ml four-necked round-bottomed reaction flask equipped with a mechanical stirrer, thermometer, reflux condenser and dropping funnel, add 206g (1.0mol) p-tert-octylphenol (PTOP) and 0.3g dodecylbenzenesulfonic acid (catalyst), and heat the mixture to 80-110°C. Then, when the temperature was lower than 110° C., 10.9 g of aqueous formaldehyde solution (LF1, 0.13 mol) was added rapidly, and the reaction was refluxed for 15 minutes, and then the condenser was changed from the reflux mode to the distillation mode. Now add 12.91 g (0.396 mol) of solid paraformaldehyde (SF) at about 100-130° C., and control the solid aldehyde addition time for 30-60 minutes. Immediately after the addition of solid aldehyde, another formaldehyde solution (LF2, 20.3 g, 0.25 mol) was ...

Embodiment 2

[0070] Synthesis of p-tert-octylphenol (PTOP)-formaldehyde (F) resin, p-toluenesulfonic acid as catalyst, PTOP: F (molar ratio)=1:0.81; LF:SF (molar ratio)=60:40, LF1:LF2 (mass ratio)=35:65

[0071] In a 500ml four-necked round-bottomed reaction flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel, add 160g (0.776 moles) of p-tertoctylphenol (PTOP) and 0.2g of p-toluenesulfonic acid (PTSA, catalyst), and heat the mixture to 80-110°C. Then, when the temperature was lower than 110° C., 10.6 g of formaldehyde aqueous solution (LF1, 0.167 mol) was added rapidly, and the reaction was refluxed for 15 minutes, and then the condenser was changed from the reflux mode to the distillation mode. Now add 8.35 g (0.256 mol) of solid paraformaldehyde (SF) at about 100-130° C., and control the solid aldehyde addition time for 30-60 minutes. Immediately after the addition of the solid aldehyde was completed, another formaldehyde solution (LF2, ...

Embodiment 3

[0073] Synthesis of p-tertoctylphenol (PTOP)-formaldehyde (F) resin, dodecylbenzenesulfonic acid as catalyst, PTOP: F (molar ratio) = 1: 0.81; LF: SF (molar ratio) = 35: 65; LF1: LF2 (mass ratio) = 35∶65

[0074] Into a 500ml four-neck round bottom reaction flask equipped with a mechanical stirrer, thermometer, reflux condenser and dropping funnel, add 160g (0.776mol) p-tertoctylphenol (PTOP) and 0.34g dodecylbenzenesulfonic acid (catalyst), and heat the mixture to 80-110°C. Then, when the temperature was lower than 110° C., 6.4 g of formaldehyde aqueous solution (LF1, 0.078 mol) was added rapidly, and the reaction was performed under reflux for 15 minutes, and then the condenser was changed from reflux mode to distillation mode. Now add 13.15 g (0.403 mol) of solid paraformaldehyde (SF) at about 100-130° C., and control the solid aldehyde addition time for 30-60 minutes. Immediately after the addition of solid aldehyde, another formaldehyde solution (LF2, 11.9 g, 0.147 m...

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Abstract

The invention relates to an improved process for alkyl phenol-formaldehyde thermoplastic tackifying resin. Liquid formaldehyde and solid formaldehyde are added, while water generated by a condensation reaction is continuously distilled out. The reaction speed of the condensation reaction of alkyl phenol and the formaldehyde is reduced due to water in the system, so the production efficiency as well as the production output is improved.

Description

technical field [0001] The invention relates to the field of rubber, and more particularly relates to an improved process for the production of alkylphenol thermoplastic resin and its application. Background of the invention [0002] Advanced radial or bias tires for cars, buses and trucks are designed to provide excellent tear resistance, wear resistance, low hysteresis, low rolling resistance, low fuel consumption and long service life. In order to achieve the above-mentioned excellent properties, the tire industry usually adds styrene-butadiene (SBR) and butadiene (BR) to the rubber formulation, especially the rubber composition formulation of the crown and the base tread. Generally speaking, in most applications, natural rubber is already sufficiently self-adhesive that no tackifier is needed. Compared with other synthetic rubbers, styrene-butadiene (SBR) has relatively low polarity. Unlike natural rubber, SBR does not undergo peroxidation during the rubber mixing proce...

Claims

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Application Information

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IPC IPC(8): C08G8/08C08L21/00C08L61/06B60C1/00
Inventor 杨全海
Owner SINO LEGEND CHINA CHEM
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