CN108276541A - A kind of the casting low formaldehyde furane resins of low furfuryl alcohol and its production method - Google Patents
A kind of the casting low formaldehyde furane resins of low furfuryl alcohol and its production method Download PDFInfo
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- CN108276541A CN108276541A CN201711472610.1A CN201711472610A CN108276541A CN 108276541 A CN108276541 A CN 108276541A CN 201711472610 A CN201711472610 A CN 201711472610A CN 108276541 A CN108276541 A CN 108276541A
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- formaldehyde
- furfuryl alcohol
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- furane resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
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Abstract
The present invention relates to resins synthesis technical field more particularly to a kind of the casting low formaldehyde furane resins of low furfuryl alcohol and its production methods.Include the raw material of following weight percent, furfuryl alcohol 55~60%, 65% xylitol 5~8%, 95% ethyl alcohol 5~8%, urea 8~13%, formaldehyde 10~15%, oxidized starch 2~4%, PVA 2~6%.The present invention can effectively reduce the content of the production cost and free formaldehyde of furane resins, prevent the pollution of the environment and body harm, increase the development space in furane resins future.
Description
Technical field
The present invention relates to resins synthesis technical field more particularly to a kind of casting low formaldehyde furane resins of low furfuryl alcohol and its
Production method.
Background technology
Resin sand technique, wherein furane resins are referred to as using the method that synthetic resin does binder configuration molding sand and core sand
Sand has the advantages such as moulding and coremaking intensity are high, dimensional accuracy is high, setting rate is fast, production efficiency is high, labor intensity is low, therefore
Using relatively broad, but the development of furan resin-sand receive of both restrict：First, the formaldehyde to dissociate in furane resins contains
Amount is higher, and smell is big, pollution environment, damages worker's health；Second, the furfuryl alcohol material price needed for synthetic resin persistently increases
Height leads to holding at high price for furane resins, affects the preparation of furane resins, uses and develop.
Invention content
Present invention seek to address that the deficiencies in the prior art, and provide a kind of casting low formaldehyde furane resins of low furfuryl alcohol and its
Production method.
The present invention to achieve the above object, using following technical scheme：A kind of casting low formaldehyde furane resins of low furfuryl alcohol,
Include the raw material of following weight percent, furfuryl alcohol 55~60%, 65% xylitol 5~8%, 95% ethyl alcohol 5~8%, urea 8
~13%, formaldehyde 10~15%, oxidized starch 2~4%, PVA2~6%.
Preferably：Include the raw material of following weight percent, furfuryl alcohol 56%, 65% xylitol 6%, 95% ethyl alcohol 7%, urine
Element 11%, formaldehyde 14%, oxidized starch 3%, PVA3%.
The present invention to achieve the above object, using following technical scheme：A kind of casting low formaldehyde furane resins of low furfuryl alcohol
Production method, include the following steps,
1) urea and formaldehyde in PH are 7~9, react 1~2h under conditions of 60~80 DEG C of reaction temperature by addition reaction；
2) polycondensation reaction, by the product of step 1) and furfuryl alcohol, 65% xylitol, 95% ethyl alcohol, oxidized starch, PVA in PH
It is 3~5, reaction temperature reacts 0.5~1h under conditions of being 80~100 DEG C；
3) dehydration is carried out dehydrating the product of step 2) using vacuum dehydration method.
Preferably：Addition reaction PH is 8,80 DEG C of reaction temperature, reaction time 1.5h；Polycondensation reaction PH is 4, reaction
100 DEG C of temperature, reaction time 1h.
The beneficial effects of the invention are as follows：The present invention replaces part furfuryl alcohol using the relatively cheap xylitol of price and ethyl alcohol,
The production cost that furane resins can effectively be reduced prevents the pollution of the environment and body harm to reduce the content of free formaldehyde,
Oxidized starch and PVA are added in the production process of furane resins as formaldehyde inhibitor, can effectively reduce content of formaldehyde.
Specific implementation mode
With reference to embodiment, the invention will be further described：
The present invention includes the raw material of following weight percent, furfuryl alcohol 55~60%, 65% xylitol 5~8%, 95% ethyl alcohol
5~8%, urea 8~13%, formaldehyde 10~15%, oxidized starch 2~4%, PVA2~6%.
The preparation method of furane resins of the present invention is：Include the following steps,
1) urea and formaldehyde in PH are 7~9, react 1~2h under conditions of 60~80 DEG C of reaction temperature by addition reaction；
2) polycondensation reaction, by the product of step 1) and furfuryl alcohol, 65% xylitol, 95% ethyl alcohol, oxidized starch, PVA in PH
It is 3~5, reaction temperature reacts 0.5~1h under conditions of being 80~100 DEG C；
3) dehydration is carried out dehydrating the product of step 2) using vacuum dehydration method.
Embodiment 1, the present invention include the raw material of following weight percent, furfuryl alcohol 56%, 65% xylitol 6%, 95% second
Alcohol 7%, urea 11%, formaldehyde 14%, oxidized starch 3%, PVA3%.
Specifically production method is：
1) formaldehyde of urea that weight percent is 11%, 14% is put into reaction kettle PH is 8, temperature is 80 DEG C
Under conditions of react 1.5h, adjust PH using sodium hydroxide solution, in this step urea and formaldehyde reaction generate an Oxymethurea and
Dimethylolpropionic urea, dimethylolpropionic urea are the primary raw material needed for subsequent reactions, the quality of the production quantity and urea and formaldehyde of dimethylolpropionic urea
Than related, therefore in order to make reaction mainly generate dimethylolpropionic urea, the weight ratio of urea and formaldehyde should be 1:1, since formaldehyde is easily waved
Hair, therefore a little higher than urea of formaldehyde weight easily generate byproduct formic acid if reaction PH is more than 9, and PH is less than 5, easily generates methylene
The derivative of base urea.
2) by the purity of furfuryl alcohol that the product of above-mentioned reaction and weight percent are 56%, 6% be 65% xylitol,
The ethyl alcohol that 7% purity is 95% PH be 4, temperature be 100 DEG C progress polycondensation reaction 1h, use hydrochloric acid solution adjust PH, wood
Sugar alcohol is the reactant that can replace furfuryl alcohol with ethyl alcohol, generates furane resins, and xylitol performance is stable, has good water solubility
And inoxidizability, it can react with formaldehyde；
Oxidized starch that weight percent is 3% and 3% PVA are the suppression aldehyde agent that free formaldehyde is reduced in reaction, PVA
Addition can reduce resin internal stress, so that resin's crosslinkage is reduced, to reduce brittleness, increase toughness, can be sent out with formaldehyde
Raw reaction, reduces free formaldehyde content, but PVA additions can excessively make resin viscosity bad stability, and few then effect was added
It does not protrude；After oxidized starch is added, the content of free formaldehyde is substantially reduced.
Reaction PH, which crosses conference, reduces reaction speed, and PH is too small moment to generate macromolecular, gelatin phenomenon occur.
3) finally product is carried out dehydrating using vacuum dehydration method.
Embodiment 2, the present invention include the raw material of following weight percent, furfuryl alcohol 55%, 65% xylitol 8%, 95% second
Alcohol 8%, urea 8%, formaldehyde 11%, oxidized starch 4%, PVA6%.
Specifically production method is：First be 8% urea by weight percent, 11% formaldehyde is put into reaction kettle
PH is 7, temperature reacts 2h under conditions of being 60 DEG C；Secondly, by the product of above-mentioned reaction and weight percent be 55% furfuryl alcohol,
Xylitol that 8% purity is 65%, 8% purity be 95% ethyl alcohol PH is 3, temperature is 80 DEG C of progress polycondensation reactions
1.5h, and it is the suppression aldehyde agent of 4% oxidized starch and 6% PVA as reduction free formaldehyde in reaction that weight percent, which is added,；
Finally product is carried out dehydrating using vacuum dehydration method.
Embodiment 3, the present invention include the raw material of following weight percent, furfuryl alcohol 60%, 65% xylitol 5%, 95% second
Alcohol 5%, urea 11%, formaldehyde 15%, oxidized starch 2%, PVA2%.
Specifically production method is：First be 11% urea by weight percent, 15% formaldehyde is put into reaction kettle
1h is reacted under conditions of PH is 9, temperature is 70 DEG C；Secondly, by the product of above-mentioned reaction and weight fraction be 60% furfuryl alcohol,
Xylitol that 5% purity is 65%, 5% purity be 95% ethyl alcohol PH is 5, temperature is 90 DEG C of progress polycondensation reactions
1.5h, and it is the suppression aldehyde of 2% oxidized starch and 2% PVA as reduction free formaldehyde in reaction that weight percent, which is added,
Agent；Finally product is carried out dehydrating using vacuum dehydration method.
Embodiment 4, furfuryl alcohol 60%, 65% xylitol 6%, 95% ethyl alcohol 7%, urea 13%, formaldehyde 10%, oxidized starch
2%, PVA2%.
First by the formaldehyde of urea that weight percent is 13%, 10% be put into reaction kettle PH be 7, temperature 60
2h is reacted under conditions of DEG C；Secondly, it is by the purity of furfuryl alcohol that the product of above-mentioned reaction is 60% with weight percent, 6%
The ethyl alcohol that 65% xylitol, 7% purity are 95% and is added PH is 3, temperature is 80 DEG C of progress polycondensation reaction 1.5h
Weight percent is 2% oxidized starch and 2% PVA as the suppression aldehyde agent for reducing free formaldehyde in reaction；Finally by product
It is carried out dehydrating using vacuum dehydration method.
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above,
As long as using the various improvement of inventive concept and technical scheme of the present invention progress, or not improved directly apply to other fields
It closes, within protection scope of the present invention.
Claims (4)
1. a kind of casting low formaldehyde furane resins of low furfuryl alcohol, it is characterised in that：Include the raw material of following weight percent, furfuryl alcohol
55~60%, 65% xylitol 5~8%, 95% ethyl alcohol 5~8%, urea 8~13%, formaldehyde 10~15%, oxidized starch 2~
4%, PVA2~6%.
2. the casting low formaldehyde furane resins of low furfuryl alcohol according to claim 1, it is characterised in that：Including following weight hundred
The raw material of point ratio, furfuryl alcohol 56%, 65% xylitol 6%, 95% ethyl alcohol 7%, urea 11%, formaldehyde 14%, oxidized starch 3%,
PVA 3%.
3. a kind of casting low formaldehyde furane resins production method of low furfuryl alcohol according to claim 1, it is characterised in that：Packet
Include following steps,
1) urea and formaldehyde in PH are 7~9, react 1~2h under conditions of 60~80 DEG C of reaction temperature by addition reaction；
2) polycondensation reaction, by the product of step 1) and furfuryl alcohol, 65% xylitol, 95% ethyl alcohol, oxidized starch, PVA PH be 3~
5, reaction temperature reacts 0.5~1h under conditions of being 80~100 DEG C；
3) dehydration is carried out dehydrating the product of step 2) using vacuum dehydration method.
4. the casting low formaldehyde furane resins production method of low furfuryl alcohol according to claim 3, it is characterised in that：Addition is anti-
It is 8 to answer PH, 80 DEG C of reaction temperature, reaction time 1.5h；Polycondensation reaction PH is 4,100 DEG C of reaction temperature, reaction time 1h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711472610.1A CN108276541A (en) | 2017-12-29 | 2017-12-29 | A kind of the casting low formaldehyde furane resins of low furfuryl alcohol and its production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711472610.1A CN108276541A (en) | 2017-12-29 | 2017-12-29 | A kind of the casting low formaldehyde furane resins of low furfuryl alcohol and its production method |
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| CN108276541A true CN108276541A (en) | 2018-07-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306045A (en) * | 2018-09-26 | 2019-02-05 | 保定永强合成材料有限公司 | Furan resin for casting and its manufacturing method |
| CN110655628A (en) * | 2019-11-06 | 2020-01-07 | 徐州盛安化工科技有限公司 | Synthetic method of environment-friendly furan resin for cast iron |
| CN113462004A (en) * | 2021-06-30 | 2021-10-01 | 西南林业大学 | Thermosetting starch/furfuryl alcohol foam material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012250A (en) * | 1983-07-04 | 1985-01-22 | Kao Corp | Production of binder for molding sand |
| CN104193936A (en) * | 2014-08-29 | 2014-12-10 | 玉林市兰科铸造材料有限公司 | Hot box resin for casting and preparation method of hot box resin for casting |
-
2017
- 2017-12-29 CN CN201711472610.1A patent/CN108276541A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012250A (en) * | 1983-07-04 | 1985-01-22 | Kao Corp | Production of binder for molding sand |
| CN104193936A (en) * | 2014-08-29 | 2014-12-10 | 玉林市兰科铸造材料有限公司 | Hot box resin for casting and preparation method of hot box resin for casting |
Non-Patent Citations (1)
| Title |
|---|
| 刘柄言: ""铸造用呋喃树脂糠醇代用材料的研究"", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306045A (en) * | 2018-09-26 | 2019-02-05 | 保定永强合成材料有限公司 | Furan resin for casting and its manufacturing method |
| CN110655628A (en) * | 2019-11-06 | 2020-01-07 | 徐州盛安化工科技有限公司 | Synthetic method of environment-friendly furan resin for cast iron |
| CN113462004A (en) * | 2021-06-30 | 2021-10-01 | 西南林业大学 | Thermosetting starch/furfuryl alcohol foam material and preparation method thereof |
| CN113462004B (en) * | 2021-06-30 | 2022-07-08 | 西南林业大学 | Thermosetting starch/furfuryl alcohol foam material and preparation method thereof |
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Application publication date: 20180713 |
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