Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modified alkylphenol-phenolic resin for rubber tackifier and preparation method thereof

A phenolic resin, alkylphenol technology, applied in the direction of adhesives, adhesive types, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of difficult to realize industrialization, long reaction time, high reaction temperature, and achieve industrialization , environmental protection, simple process effect

Active Publication Date: 2014-08-27
RACHEM CHINA CO LTD +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the reaction temperature is too high, the reaction time is long, and the prepared product is only used in EPDM rubber, and the application range is narrow.
However, this method is difficult to realize industrialization because it needs to be carried out under high pressure.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified alkylphenol-phenolic resin for rubber tackifier and preparation method thereof
  • Modified alkylphenol-phenolic resin for rubber tackifier and preparation method thereof
  • Modified alkylphenol-phenolic resin for rubber tackifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Into a 500ml four-neck round bottom reaction flask equipped with a mechanical stirrer, thermometer, reflux condenser and dropping funnel, 150g (1.0 mole) p-tert-butylphenol and 0.25g dodecylbenzenesulfonic acid (catalyst ), heat the mixture to 80°C to 120°C. When the temperature was 105° C., 33.2 g (0.41 mol) of aqueous formaldehyde solution was added dropwise. After the dropwise addition of the aqueous formaldehyde solution was completed, 10 g of xylene was added, and the reaction was kept under reflux for 10 minutes. Continue to add 22.1g (0.27mol) formaldehyde aqueous solution and reflux for 30 minutes. Then the condenser was changed from the reflux state to the distillation state, and the temperature of the reactants was heated to 130°C to 135°C. After stirring and reacting at this temperature for 1 hour, the temperature was raised to 180°C. Then add 0.12g of 1,8-diazabicyclo-bicyclo(5,4,0)-7-undecene (DBU) neutralization catalyst, stir the reaction for 15 minutes, ...

Embodiment 2

[0037] Into a 500ml four-necked round-bottomed reaction flask equipped with a mechanical stirrer, thermometer, reflux condenser and dropping funnel, 150g (1.0 mole) p-tert-butylphenol and 0.30g dodecylbenzenesulfonic acid (catalyst ), heat the mixture to 80°C to 120°C. When the temperature was 95° C., 54.8 g (0.68 mol) of aqueous formaldehyde solution was added dropwise. After the dropwise addition of the aqueous formaldehyde solution was completed, 80 g of xylene was added, and the reaction was kept under reflux for 10 minutes. Continue to add 18.1 g (0.22 mol) formaldehyde aqueous solution, and react under reflux for 30 minutes. Then the condenser was changed from the reflux state to the distillation state, and the temperature of the reactants was heated to 130°C to 135°C. After stirring and reacting at this temperature for 1 hour, the temperature was raised to 190°C. Then, 1.47g of 2.5% NaOH aqueous solution was added to neutralize the catalyst. After stirring and reacting ...

Embodiment 3

[0039] Into a 500ml four-neck round bottom reaction flask equipped with a mechanical stirrer, thermometer, reflux condenser and dropping funnel, add 150g (1.0 mole) p-tert-butylphenol and 0.15g p-toluenesulfonic acid (catalyst), and heat Mix the mixture to 80°C ~ 120°C. When the temperature was 100° C., 46.2 g (0.57 mol) of aqueous formaldehyde solution was added dropwise. After the dropwise addition of the aqueous formaldehyde solution was completed, 45 g of xylene was added, and the reaction was kept under reflux for 10 minutes. Continue to add 5.6 g (0.17 mol) of paraformaldehyde, and react under reflux for 30 minutes. Then the condenser was changed from the reflux state to the distillation state, and the temperature of the reactants was heated to 130°C to 135°C. After stirring and reacting at this temperature for 1 hour, the temperature was raised to 190°C. Then, 1.26g of 2.5% NaOH aqueous solution was added to neutralize the catalyst. After stirring and reacting for 15 mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses modified alkylphenol-phenolic resin and a preparation method thereof. The method comprises the following steps of: reacting alkylphenol with formaldehyde under the condition of an acidic catalyst; adding dimethylbenzene for modifying or mixing the dimethylbenzene with the alkylphenol, and adding the formaldehyde under the condition of the acidic catalyst to perform reaction; after adding the formaldehyde, performing reflux for 0.5 to 2 hours, and converting the reflux state of a condenser into a distillation state; heating a reactant to the temperature of between 130 and 200 DEG C, and neutralizing the catalyst by using a neutralizer; and distilling under reduced pressure to obtain the dimethylbenzene modified alkylphenol-phenolic resin. According to the method, a preparation process is simple, and the content of residual alkylphenol monomers in the resin is less than 2 percent. The resin is applied to a mixture of natural rubber and synthetic rubber, so that the stickiness of rubber sizing materials serving as semi-finished products can be improved obviously, and the natural rubber and the synthetic rubber have high stickiness retention rate.

Description

Technical field [0001] The present invention relates to the modification of phenolic resin, in particular to a modified alkylphenol-phenolic resin used as a rubber tackifier and a preparation method thereof. Background technique [0002] Self-adhesiveness is the characteristic of bonding between raw rubber compounds and finally fusing into one. It is the result of mutual diffusion and penetration of rubber molecules on the surface of the rubber layer caused by thermal movement. Most rubber products need to be laminated, laminated, and overlapped to complete the molding process, so they are inseparable from self-adhesive. The self-adhesiveness of natural rubber is the most ideal and has excellent molding and processing properties. Most synthetic rubbers have relatively poor self-adhesion and processing viscosity. Due to the universality of self-adhesive in rubber processing, it is often listed as one of the main processing performance indicators. [0003] In addition to natural ru...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08L61/14C08L7/00C08L21/00C09J161/14
Inventor 王文芳张成房彩琴董栋
Owner RACHEM CHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com