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

High-ortho benzyl ether phenolic resin and preparation method thereof, and method for applying high-ortho benzyl ether phenolic resin to cold box binder

A technology of phenolic resin and binder, which is applied in the field of high-ortho-benzyl ether phenolic resin with high methylol content and its preparation, can solve the problem of not completely improving the collapsibility of resin sand cores, and can not effectively improve the curing performance of resin and other problems, to achieve the effect of improving normal temperature performance and curing speed, high sand core strength, and improving normal temperature performance

Active Publication Date: 2016-10-26
JINAN SHENGQUAN GROUP SHARE HLDG
View PDF13 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The applicant's previous Chinese patent CN101147953 discloses a high-performance low-smoke flame-retardant amine-based cold box binder, which involves the preparation of high-ortho-benzyl ether phenolic resin, but the prepared high-ortho-benzyl ether phenolic resin The resin still cannot effectively improve the curing performance of the resin, nor has it completely improved the collapse of the resin sand core

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
  • High-ortho benzyl ether phenolic resin and preparation method thereof, and method for applying high-ortho benzyl ether phenolic resin to cold box binder
  • High-ortho benzyl ether phenolic resin and preparation method thereof, and method for applying high-ortho benzyl ether phenolic resin to cold box binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation method of high ortho benzyl ether phenolic resin is as follows:

[0061] Step 1: Put 420 kg of melted phenol, 60 kg of bisphenol A, 312 kg of paraformaldehyde, 4 kg of calcium oxide, and 0.6 kg of zinc acetate into the reactor and stir evenly, and use a pH regulator to lower the mixture at 30-40°C PH value is 4~7;

[0062] Step 2: Adjust the reactor condenser to the reflux state, raise the temperature under stirring, raise the temperature to 95°C within 60 minutes, and keep the reaction at 95-105°C for 90 minutes;

[0063] Step 3: Adjust the reaction kettle to the normal pressure fractionation state, raise the temperature inside the kettle to 115°C within 60 minutes, and keep the reaction at 115-120°C for 60 minutes;

[0064] Step 4: After the heat preservation is completed, cool down to below 100°C, then vacuumize to make the vacuum degree reach 300mmHg, and vacuumize for 30 minutes to obtain a high-ortho benzyl ether phenolic resin with a high methylo...

Embodiment 2

[0066] The preparation method of high ortho benzyl ether phenolic resin is as follows:

[0067] Step 1: Put 420 kg of melted phenol, 60 kg of bisphenol A, 398 kg of paraformaldehyde, 4 kg of calcium oxide, and 1 kg of zinc acetate into the reaction kettle and stir evenly, and use a pH regulator to lower the mixture at 30-40°C PH value is 5~6;

[0068] Step 2: Adjust the reactor condenser to the reflux state, raise the temperature under stirring, raise the temperature to 95°C within 60 minutes, and keep the reaction at 95-105°C for 90 minutes;

[0069] Step 3: Adjust the reaction kettle to the normal pressure fractionation state, raise the temperature inside the kettle to 115°C within 60 minutes, and keep the reaction at 115-120°C for 60 minutes;

[0070] Step 4: After the heat preservation is completed, cool down to below 100°C, and then vacuumize to make the vacuum degree reach 600mmHg, and vacuumize for 25 minutes to obtain a high-ortho benzyl ether phenolic resin with a hi...

Embodiment 3

[0072] The preparation method of high ortho benzyl ether phenolic resin is as follows:

[0073] Step 1: Put 420 kg of melted phenol, 60 kg of bisphenol A, 368 kg of paraformaldehyde, 4 kg of calcium oxide, and 1 kg of zinc acetate into the reactor and stir evenly, and use a pH regulator to lower the mixture at 30-40°C 5 to 6;

[0074] Step 2: Adjust the reactor condenser to the reflux state, raise the temperature under stirring, raise the temperature to 95°C within 60 minutes, and keep the reaction at 95-105°C for 90 minutes;

[0075] Step 3: Adjust the reaction kettle to the normal pressure fractionation state, raise the temperature inside the kettle to 115°C within 60 minutes, and keep the reaction at 115-120°C for 60 minutes;

[0076] Step 4: After heat preservation is completed, cool down to below 100°C, then vacuumize to make the vacuum degree reach 400mmHg, and vacuumize for 30 minutes to obtain a high-ortho benzyl ether phenolic resin with high methylol content.

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
Bending strengthaaaaaaaaaa
Bending strengthaaaaaaaaaa
Bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-ortho benzyl ether phenolic resin and a preparation method thereof, and a method for applying the high-ortho benzyl ether phenolic resin to a cold box binder, belonging to the technical field of phenolic resin. The high-ortho benzyl ether phenolic resin contains more than 27% of a hydroxymethyl group. The high-ortho benzyl ether phenolic resin is prepared by adding a molten phenol mixture, paraformaldehyde and a composite catalyst into a reaction vessel, selecting a proper mol ratio of phenolic to aldehyde and carrying out reaction under certain conditions. The prepared high-ortho benzyl ether phenolic resin has high hydroxymethyl content and realizes rapid reaction and curing with isocyanate radicals of isocyanate under the catalysis of amine, so normal-temperature strength of the resin is improved. Compared with the prior art, the high-ortho benzyl ether phenolic resin provided by the invention has the following advantages when applied to non-ferrous casting: under the condition that normal-temperature strength of a resin sand core is guaranteed, the usage amount of the resin is greatly reduced; collapsibility of the resin sand core is improved; the residual quantity of tar on a metal die is decreased; and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of phenolic resins, in particular to a high-ortho benzyl ether phenolic resin with high methylol content and a preparation method thereof. Background technique [0002] The biggest feature of high ortho phenolic resin is its fast polymerization speed, which can be quickly cured with isocyanate under the catalysis of amines, so it has a good application in casting resin sand. The ideal resin sand core should be in the pouring process. It should have the characteristics of good fluidity and fast solidification and molding in the mold. Resin sand with fast curing characteristics can reduce molding time and increase production efficiency. Although increasing the amount of resin added can improve the rapid curing performance, it will seriously affect the fluidity of the resin sand core, especially in the process of colored casting sand due to the low pouring temperature, the binder in the sand core is not comple...

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
IPC IPC(8): C08G8/24C08G18/54B22C1/22
CPCB22C1/22B22C7/06C08G8/24B22C1/2273C08G18/542
Inventor 祝建勋许增彬
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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