Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-cost and high-strength furan resin and preparation method thereof

A furan resin and high-strength technology, which is applied in the field of low-cost and high-strength furan resin and its preparation, can solve the problems of furan resin strength reduction, furan resin price rise, casting industry impact, etc., to achieve shortened reaction time and enhanced resin strength , the effect of improving the reaction speed

Inactive Publication Date: 2014-09-03
CHONGQING HAOJIANG REFRACTORY MATERIALS CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the price of raw material furfuryl alcohol is 10,000-20,000 yuan / ton and has remained high, the price of furan resin has risen sharply, which has brought an impact on the foundry industry
And reduce the consumption of furfuryl alcohol, can cause the strength of furan resin to reduce again and can not meet the requirement of foundry industry, as application number is 201110407561. shortcoming

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
  • Low-cost and high-strength furan resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First put 28kg of 36.5% formaldehyde in the reaction kettle, start the mixer, add 3kg of melamine, then add 15% NaOH solution to adjust the pH value to 8.4, heat up to 60°C, and keep it warm for 30 minutes; then add 11kg of urea, Then add NaOH solution with a concentration of 15% to adjust the pH value to 8.4, maintain the temperature at 60°C, and keep it warm for 30 minutes; add 30kg of furfuryl alcohol and 21.2kg of industrial xylitol mother liquor, and then add HCl solution with a concentration of 15% to adjust the pH value to 3.6, heat up to 80°C, and keep warm for 60 minutes; close the feed valve on the reactor to make it in a sealed state, turn on the vacuum pump to increase the vacuum of the reactor to 0.03MPa, heat and dehydrate 5kg; reduce the temperature to 60°C, add 6kg of furfuryl alcohol and 0.8kg of silane coupling agent Z-6011, stir for 30 minutes and discharge; when the temperature is below 40°C, take a sample and send it to the laboratory for inspection....

Embodiment 2

[0025] First put 30kg of 36.5% formaldehyde in the reaction kettle, start the mixer, add 2kg of melamine, then add 40% NaOH solution to adjust the pH value to 8.8, heat up to 65°C, and keep it warm for 30 minutes; then add 6kg of urea, Then add NaOH solution with a concentration of 40% to adjust the pH value to 8.8, maintain the temperature at 65°C, and keep warm for 30 minutes; add 30kg of furfuryl alcohol and 23.7kg of industrial xylitol mother liquor, then add dilute sulfuric acid to adjust the pH value to 5.0, and heat up After reaching 108°C, keep warm for 90 minutes; close the feed valve on the reactor to make it in a sealed state, turn on the vacuum pump to increase the vacuum degree of the reactor to 0.09MPa, heat and dehydrate 6kg; lower the temperature to 60°C, and then add 7.6kg of furfuryl alcohol and 0.7kg of silane coupling agent KH-550 were stirred for 30 minutes and discharged; when the temperature was below 40°C, samples were taken and sent to the laboratory fo...

Embodiment 3

[0027] First put 26kg of 36.5% formaldehyde in the reaction kettle, start the mixer, add 0.5kg of melamine, then add 35% NaOH solution to adjust the pH value to 8.6, heat up to 60°C, and keep it warm for 30 minutes; then add 6kg of urea , then add a 35% NaOH solution to adjust the pH to 8.4, maintain the temperature at 60°C, and keep it warm for 30 minutes; add 35kg of furfuryl alcohol and 22kg of industrial xylitol mother liquor, and then add a 15% HCl solution to adjust the pH To 4.2, after heating up to 90°C, keep warm for 60 minutes; close the feed valve on the reactor to make it in a sealed state, turn on the vacuum pump to increase the vacuum of the reactor to 0.07MPa, heat and dehydrate 5kg; reduce the temperature to 60°C, then add 10kg of furfuryl alcohol and 0.5kg of silane coupling agent KH-560, stir for 30 minutes and discharge; when the temperature is below 40°C, take a sample and send it to the laboratory for inspection. After passing the test, measure and pack it ...

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

No PUM Login to View More

Abstract

The invention relates to a low-cost and high-strength furan resin and a preparation method thereof. The low-cost and high-strength furan resin comprises the following constituents according to percentage by weight: 12-30% of 36.5% formaldehyde, 3-12% of urea, 35-70% of furfuryl alcohol, 0.5-5% of melamine, 0.1-25% of industrial xylitol mother liquor and 0.2-0.8% of coupling agent. The preparation method comprises the following steps of formaldehyde alkaline reaction, urea alkaline reaction, furfuryl alcohol acid reaction, vacuum dehydration and discharge. The low-cost and high-strength furan resin disclosed by the invention has the beneficial effects that the using amount of the furfuryl alcohol and the wastewater discharge can be obviously reduced, so that the effects of reducing production cost and energy consumption can be achieved.

Description

technical field [0001] The invention relates to the field of furan resin material production, in particular to a low-cost high-strength furan resin and a preparation method thereof. Background technique [0002] Furan resin refers to the general term for resins produced from furfuryl alcohol and furfural with a furan ring as raw materials. It solidifies into insoluble and infusible solids under the action of strong acid. The types include furfuryl alcohol resin, furfural resin, furfurone resin, furfurone —Formaldehyde resin, etc. Furan resin is often used as a sand core binder in the casting process of the machinery industry, and is especially suitable for large-scale and high-volume machinery manufacturing, such as the production of automobile military industry, internal combustion engines, diesel engines, and sewing machines. When used as a binder for foundry sand cores, furan resin has the following characteristics: fast curing speed, low strength at room temperature, an...

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): C08G16/04
Inventor 刘巍
Owner CHONGQING HAOJIANG REFRACTORY MATERIALS CO LTD