CN102049463A - Resin sand flame retardant and using method thereof - Google Patents
Resin sand flame retardant and using method thereof Download PDFInfo
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- CN102049463A CN102049463A CN2009101028376A CN200910102837A CN102049463A CN 102049463 A CN102049463 A CN 102049463A CN 2009101028376 A CN2009101028376 A CN 2009101028376A CN 200910102837 A CN200910102837 A CN 200910102837A CN 102049463 A CN102049463 A CN 102049463A
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- resin
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- flame retardant
- sulfonic acid
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Abstract
The invention discloses a resin sand flame retardant and a using method thereof, relates to the fields of casting and flame retardancy, in particular to a flame retardant taking resin sand as a die-casting combustible alloy and a using method thereof. The resin sand flame retardant is solution of alkyl sodium sulfonate, and the using method comprises the following steps of: taking fresh sand in a certain mass; taking partial alkaline resin which is 0.75 to 12 weight percent of the sand; taking alkyl sodium sulfonate in a mass which is 2 to 3.5 percent of weight of the partial alkaline resin to prepare solution; mixing the solution of alkyl sodium sulfonate and the partial alkaline resin; mixing the mixture and the fresh sand; and fully mixing with the partial alkaline resin to prepare a resin sand casting model. By taking the alkyl sodium sulfonate as the flame retardant for the resin sand, the combustible alloy can be effectively prevented from combusting. Due to the solution of alkyl sodium sulfonate, micro powder content in raw sand is effectively reduced, and the physical property of the resin sand is improved; and the production flow is simplified, and the production cost is reduced.
Description
Technical field
The present invention relates to cast anti-flaming field, exactly relate to a kind of with the flame retardant and the using method thereof of resin sand as mold casting boiler plug alloy.
Background technology
Along with the progress of science and technology development with society, be more and more higher to the requirement of foundry goods, foundry goods will towards in light weight, intensity is high, no surplus or few surplus processing, surface roughness require high, quality conformance better direction to develop.Adopt traditional clay-bonded sand tide mold technique, be difficult to satisfy the requirement of the new period foundry goods.Therefore more and more be applied in the casting field as cast model with self-hardening resin sand.At boiler plug alloy, for example magnesium alloy is as a kind of foundry goods raw material commonly used, oxidizing fire very easily in cast and cavity filling process, this just need add anti-flaming filler in making the cast model material, with prevent foundry goods pour into a mould and the solidification shrinkage process in produce oxidizing fire.Simultaneously, resin sand technology generally requires below 0.5% the very strictness of the powder content control of roughing sand.Traditional boiler plug alloy flame retardant is mainly based on boric acid, sulphur, because sulphur, boric acid are the powdery solid material, add in the roughing sand and will certainly increase powder content, reduce the serviceability of resin sand, it is low to make resin sand intensity occur, drop is arranged or do not solidify phenomenon, also can cause cast(ing) surface coarse.Improve intensity as need and then need increase a large amount of resins and catalyst, cause production cost to increase.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of novel flame retardant and using method thereof, both reduced the powder content in the roughing sand, also improved the intensity of resin sand greatly, make cast(ing) surface smoothly not coarse.
A kind of resin sand flame retardant is the alkyl sulfonic acid sodium solution, and the structural formula of its sodium sulfonate of alkane is:
The anti-flaming effect of alkyl sulfonic acid sodium solution mainly is by gas phase protection, two aspects of dense film protection are formed, the alkyl sulfonic acid sodium solution is the compound of open-chain structure, be heated to 270 ℃ of beginning chain ruptures, because the C-H chain combination is more firm, so often disconnect from the C-C chain earlier, generate the alkane alkenes compounds of a lot of short chains, rising along with temperature, the alkane alkenes compounds of these short chains takes place, generate carbon, water and carbon dioxide, after being heated, sulfonic group decomposites SO2, gas such as H2S and S, and SO2 and CO2 are that the injection of utmost point difficult to burn gas is between boiler plug alloy and resin sand mold, to boiler plug alloy formation gas phase protection; Decomposite the sulphur of a large amount of free states after the alkyl sulfonic acid sodium solution is heated, thus it can be directly and the boiler plug alloy melon generate the higher sulfuration alloy of compacting factor and play a protective role.
Using method when the alkyl sulfonic acid sodium solution is used as flame retardant:
The temperature of this method will guarantee between 5 ℃～30 ℃;
Step 1, get the fresh sand of certain mass;
Step 2, get and account for sand and weigh 0.75%～1% meta-alkalescence resin;
Step 3, get the alkyl sulfonic acid sodium solution that accounts for meta-alkalescence weight resin 2%～3.5% in the step 2;
Step 4, with alkyl sulfonic acid sodium solution in the step 3 and the meta-alkalescence mixed with resin in the step 2;
Step 5, the mixture in the step 4 is mixed with fresh sand in the step 1;
Step 6, get the slant acidity resin identical with meta-alkalescence resin quality in the step 2;
Step 7, fully mix with slant acidity resin in the step 6 having added the meta-alkalescence resin sand of alkyl sulfonic acid sodium solution in the step 5;
Step 8, making resin sand cast model.
Adopt the alkyl sulfonic acid sodium solution can effectively play anti-flaming effect to boiler plug alloy as the flame retardant of resin sand.The alkyl sulfonic acid sodium solution that uses has effectively reduced the powder content in the roughing sand, has improved the physical property of resin sand, has simplified production procedure and has reduced production cost.
The specific embodiment
Below the present invention is described further:
As the preferred version of technical scheme part in the summary of the invention among the present invention, the meta-alkalescence resin in the step 2 can be selected phenyl ether phenolic resins for use, and the slant acidity resin in the step 6 can be selected polyisocyanate fat for use.
Alkyl sulfonic acid in the alkyl sulfonic acid sodium solution using method step 3 accounts for the percentage preferred 2.5%～3% of slant acidity resin quality in the step 2, adopt the alkyl sulfonic acid sodium solution in this scope can make the anti-flaming better effects if of resin sand cast model, meet resin sand cast model tension, resistance to compression and gas permeability technological requirement simultaneously.
Between preferred 18 ℃～25 ℃ of the temperature in carrying out resin sand mold process, can not fully react between too short two resinoids of time, the too low sand mo(u)ld of the intensity of mold can loose, and the too high model of temperature is not finished to react between two resinoids and finished.
For obtaining the technological parameter of the cast model of resin sand under the situation of different weight percentage that the sodium alkyl sulfonate solution weight accounts for the meta-alkalescence resin, under 20 ℃ of room temperatures, done following test by the step in the technical scheme:
Step 1, get the fresh sand of 2Kg;
Step 2, phenyl ether phenolic resins 0.9 gram;
Step 3, the alkyl sulfonic acid sodium solution of getting Different Weight are made solution;
Step 4, the gains in step 2 and the step 3 are mixed;
Step 5, the gains of step 4 are mixed with fresh sand in the step 1;
Step 6, get polyisocyanate fat 0.9 gram;
Step 7, step 6 are mixed with gains in the step 5;
Step 8, making resin sand model.
Obtaining experimental result sees the following form:
Through overtesting, in the step 2 resin, add the alkyl sulfonic acid sodium solution that accounts for resin 2.5%～3%, can effectively prevent the oxidizing fire of foundry goods in casting process, and not reduce resin sand intensity, can satisfy manufacturing technique requirent.
Claims (5)
1. a resin sand flame retardant is the alkyl sulfonic acid sodium solution.
2. the using method of the described resin sand flame retardant of claim 1:
Using method when the alkyl sulfonic acid sodium solution is used as flame retardant:
The temperature of this method will guarantee between 5 ℃～30 ℃;
Step 1, get the fresh sand of certain mass;
Step 2, get and account for sand and weigh 0.75%～1% meta-alkalescence resin;
Step 3, get the alkyl sulfonic acid sodium solution that accounts for meta-alkalescence weight resin 2%～3.5% in the step 2;
Step 4, with alkyl sulfonic acid sodium solution in the step 3 and the meta-alkalescence mixed with resin in the step 2;
Step 5, the mixture in the step 4 is mixed with fresh sand in the step 1;
Step 6, get the slant acidity resin identical with meta-alkalescence resin quality in the step 2;
Step 7, fully mix with slant acidity resin in the step 6 having added the meta-alkalescence resin sand of alkyl sulfonic acid sodium solution in the step 5;
Step 8, making resin sand cast model.
3. the using method of resin sand flame retardant according to claim 2 is characterized in that: the meta-alkalescence resin in the step 2 can be selected phenyl ether phenolic resins for use, and the slant acidity resin in the step 6 can be selected polyisocyanate fat for use.
4. according to the using method of claim 2 or the described resin sand flame retardant of 3 arbitrary claims, it is characterized in that: the alkyl sulfonic acid in the sodium alkyl sulfonate using method step 3 account for slant acidity resin quality in the step 2 percentage preferred 2.5%～3%.
5. according to the using method of claim 2 or the described resin sand flame retardant of 3 arbitrary claims, it is characterized in that: between preferred 18 ℃～25 ℃ of the temperature in carrying out resin sand mold process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101028376A CN102049463A (en) | 2009-11-06 | 2009-11-06 | Resin sand flame retardant and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101028376A CN102049463A (en) | 2009-11-06 | 2009-11-06 | Resin sand flame retardant and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102049463A true CN102049463A (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101028376A Pending CN102049463A (en) | 2009-11-06 | 2009-11-06 | Resin sand flame retardant and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012066145A2 (en) | 2010-11-19 | 2012-05-24 | Hüttenes-Albertus Chemische Werke GmbH | Sulfonic acid-containing binder for molding material mixes for the production of molds and cores |
| DE102012201971A1 (en) | 2012-02-09 | 2013-08-14 | Hüttenes-Albertus Chemische Werke GmbH | Cold box binder systems and blends for use as additives to such binder systems |
-
2009
- 2009-11-06 CN CN2009101028376A patent/CN102049463A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012066145A2 (en) | 2010-11-19 | 2012-05-24 | Hüttenes-Albertus Chemische Werke GmbH | Sulfonic acid-containing binder for molding material mixes for the production of molds and cores |
| DE202011110579U1 (en) | 2010-11-19 | 2014-11-28 | Hüttenes-Albertus Chemische Werke GmbH | Sulfonic acid-containing binder for molding material mixtures for the production of molds and cores |
| DE102012201971A1 (en) | 2012-02-09 | 2013-08-14 | Hüttenes-Albertus Chemische Werke GmbH | Cold box binder systems and blends for use as additives to such binder systems |
| WO2013117256A1 (en) | 2012-02-09 | 2013-08-15 | Hüttenes-Albertus Chemische Werke GmbH | Cold-box binder systems and mixtures for usage as additives for such binder systems |
| DE202012013467U1 (en) | 2012-02-09 | 2017-01-30 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Cold box binder systems and blends for use as additives to such binder systems |
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Application publication date: 20110511 |