CN110479952B - Odor masking agent for furan resin sand for casting and preparation method thereof - Google Patents
Odor masking agent for furan resin sand for casting and preparation method thereof Download PDFInfo
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- CN110479952B CN110479952B CN201910700316.4A CN201910700316A CN110479952B CN 110479952 B CN110479952 B CN 110479952B CN 201910700316 A CN201910700316 A CN 201910700316A CN 110479952 B CN110479952 B CN 110479952B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/224—Furan polymers
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Abstract
The invention relates to a smell shielding agent for furan resin sand casting and a preparation method thereof. The chemical components of the odor masking agent for the furan resin sand for casting comprise anhydrous methanol, glyceryl triacetate, diethylene glycol, lilial, peach aldehyde, benzyl salicylate, ethyl isovalerate, diatomite, dipropylene glycol, allyl heptanoate, styrallyl acetate, diethyl phthalate, triethylene glycol tridecanoate, ethyl acetate, alpha-hexyl cinnamaldehyde, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and nano titanium dioxide powder. The odor masking agent for casting furan resin sand and the furan resin containing the odor masking agent are sprayed in the modeling and pouring places of the furan resin sand, so that volatile harmful substances such as free formaldehyde, toluene, xylene and the like can be effectively adsorbed and reduced, meanwhile, light fragrance is emitted, and the operation site is improved.
Description
Technical Field
The invention relates to the field of casting, in particular to a smell shielding agent for furan resin sand for casting and a preparation method thereof.
Background
In recent years, furan resin is widely applied to casting production, particularly urea-formaldehyde furan resin, which is rapidly and widely regarded by the casting industry of various countries in the world by virtue of the advantages of low viscosity, high strength, strong acid resistance, strong alkali resistance, high temperature resistance, good collapsibility, simple synthesis process and the like, and the furan resin self-hardening sand process has the advantages of self-hardening at normal temperature, low energy consumption, high production efficiency, high old sand recovery rate, high size precision of produced castings, good surface quality of castings and the like, so that furan resin becomes the most amount of resin for casting in China. However, with the rapid development of the economy in China and the increase of the demand of the domestic foundry industry, the field of casting materials, particularly self-hardening furan resin, is rapidly developed, and the treatment of the environmental health problem of a foundry is generated along with the rapid development of the economy in China. The production of a non-toxic furan resin with reliable service performance is a common target of research personnel of casting materials at present when the environment is increasingly worsened, but the field of adhesives has a statement of 'no aldehyde but no colloid', formaldehyde is a main raw material of the urea-formaldehyde furan resin with the largest use amount, but formaldehyde is easy to cause abnormal smell, allergy, abnormal lung function and abnormal immune function of a human body, is a well-known allergic reaction source and is one of potential strong carcinogenic substances. Free formaldehyde can volatilize in the storage and use of resin and the operation of pouring resin sand, seriously threatens the health of workers, and works in the environment for a long time, so that respiratory diseases such as dry throat, nausea, nasosinusitis, pharyngitis and the like are easily caused, mucous membrane congestion can be caused by long-term chronic stimulation, and leukemia can be also caused seriously. In addition, harmful substances such as toluene and xylene in the sulfonic acid curing agent used together with furan resin are volatilized in the molding and casting of the resin sand. Therefore, on one hand, the environmental protection performance of the resin is improved, such as the content of free formaldehyde in the resin is reduced, but the volatilization of the free formaldehyde can be only reduced in the storage process of the resin, and how to reduce harmful substances such as the free formaldehyde, toluene, xylene and the like in the whole process of the storage, use and resin sand pouring operation of the resin is an important problem which needs to be solved urgently in the front of the majority of casting researchers.
The special odor masking agent for furan resin sand is a composite product formed by mixing organic chemicals, and mainly comprises the following components: taste masking agent, perfume and high-efficiency dispersant, and the working principle thereof is as follows: the coating is prepared by organically interacting and processing through special processes, wherein in the volatilization process, the absorbent seeps out of the surface of a film forming liquid to capture uncomfortable molecules, and forms a shielding net on the surface of a coating while adsorbing monomer peculiar smell, so that the volatilization of organic matters such as free formaldehyde, toluene, xylene and the like is reduced, and meanwhile, the effects of shielding and removing the odor are achieved, the reaction with resin is avoided, and the normal use of the resin is not influenced. Therefore, the odor masking agent is added into the furan resin and sprayed in the molding and casting places of the furan resin sand, so that the volatile harmful substances such as free formaldehyde, toluene, xylene and the like can be effectively adsorbed and reduced, and meanwhile, the faint fragrance is emitted, and the operation site is improved.
The prior art is lack of thoroughly solving the problems of volatilization of free formaldehyde of common urea-formaldehyde furan resin, volatilization of harmful substances such as free formaldehyde, toluene, xylene and the like in the process of molding and pouring resin sand, bad smell of an operation site and the like.
Disclosure of Invention
Based on the above, the invention provides the odor masking agent for the furan resin sand for casting and the preparation method thereof through technical innovation, aiming at the problems that the prior art is lack of completely solving the problems of volatilization of free formaldehyde of common urea-formaldehyde furan resin, volatilization of harmful substances such as free formaldehyde, toluene, xylene and the like in the process of molding and pouring resin sand, bad odor of an operation site and the like.
In order to solve the above disadvantages, the invention adopts the technical scheme that:
the odor masking agent for the casting furan resin sand comprises, by weight, 10-20% of anhydrous methanol, 20-40% of glyceryl triacetate, 15-45% of diethylene glycol, 1-3% of lilial, 1-3% of peach aldehyde, 1-6% of benzyl salicylate, 0.01-0.03% of ethyl isovalerate, 7-11% of kieselguhr, 0.01-0.03% of dipropylene glycol, 0.01-0.03% of allyl heptanoate, 0-0.2% of styrofoam acetate, 0.01-0.03% of diethyl phthalate, 0.01-0.03% of cycloethylene tridecanedioate, 0.99-1.01% of ethyl acetate, 1-9% of alpha-hexyl cinnamon, 0.6-1% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-benzotriazol chloride, 1 to 3 percent of nano titanium dioxide powder.
The preparation method of the odor masking agent for the furan resin sand for casting comprises the following steps:
s1: sequentially adding anhydrous methanol, diethylene glycol, dipropylene glycol, diethyl phthalate and ethyl acetate into a reaction kettle, and uniformly stirring;
s2: and then treating glyceryl triacetate, convallaldehyde, peach aldehyde, benzyl salicylate, ethyl isovalerate, diatomite, allyl heptanoate, styrallyl acetate, triethylene glycol tridecanedioate, alpha-hexyl cinnamaldehyde, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and nano titanium dioxide powder, adding into a reaction kettle, and stirring for 30-60 min to obtain the finished product.
Further, the rotating speed of the stirring kettle in the S1 is 500-800 r/min.
Further, the rotating speed of the stirring kettle in the S2 is 800-1200 r/min.
A furan resin containing taste-masking agent, which is prepared by adding the above-mentioned taste-masking agent for foundry furan resin sand to a finished furan resin and stirring.
Further, the rotating speed during stirring is 60-120 r/min, and the stirring time is 30-60 min.
The invention has the beneficial effects that:
(1) the free formaldehyde detection content of the general urea formaldehyde furan resin binder is about 0.3%, the free formaldehyde detection content of the furan resin binder containing the odor masking agent is about 0.03%, and the free formaldehyde is reduced by 90%.
(2) The detection content of free formaldehyde of the environment-friendly urea formaldehyde furan resin binder is about 0.1%, the detection content of free formaldehyde of the furan resin binder containing the odor masking agent is about 0.03%, and the free formaldehyde is reduced by 70%.
(3) The formaldehyde content of the general urea formaldehyde furan resin binder measured by a formaldehyde detector in the molding process is about 78ppm, and the formaldehyde content of the furan resin binder containing the odor masking agent measured by the formaldehyde detector in the molding process is only about 5.8ppm, so that the formaldehyde content is obviously reduced.
(4) The formaldehyde content of the environment-friendly urea formaldehyde furan resin binder measured by a formaldehyde detector in the molding process is about 56ppm, and the formaldehyde content of the furan resin binder containing the odor masking agent measured by the formaldehyde detector in the molding process is only about 5.8ppm, so that the formaldehyde content is obviously reduced.
(5) The formaldehyde content of the general urea formaldehyde furan resin binder measured by a formaldehyde detector in the casting process is about 35ppm, and the formaldehyde content of the furan resin binder containing the odor masking agent measured by the formaldehyde detector in the molding process is only about 3.6ppm, so that the formaldehyde content is obviously reduced.
(6) The formaldehyde content of the environment-friendly urea formaldehyde furan resin binder measured by a formaldehyde detector in the casting process is about 25ppm, and the formaldehyde content of the furan resin binder containing the odor masking agent measured by the formaldehyde detector in the molding process is only about 3.6ppm, so that the formaldehyde content is obviously reduced.
(7) The general urea-formaldehyde furan resin binder has obvious irritating and irritating formaldehyde smell, toluene or xylene smell and furan resin smell in the molding process, the furan resin binder containing the taste masking agent has light fruity smell in the molding process, and the smell of a casting shop is thoroughly improved.
(8) The environment-friendly urea formaldehyde furan resin binder has obvious irritating and irritating formaldehyde smell, toluene or xylene smell and furan resin smell in the molding process, the furan resin binder containing the taste masking agent has light fruity smell in the molding process, and the smell of a casting shop is thoroughly improved.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying examples. The preferred embodiments of the present invention are given in the examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The following is to be understood in conjunction with the specific examples:
the odor masking agent for the casting furan resin sand comprises, by weight, 10-20% of anhydrous methanol, 20-40% of glyceryl triacetate, 15-45% of diethylene glycol, 1-3% of lilial, 1-3% of peach aldehyde, 1-6% of benzyl salicylate, 0.01-0.03% of ethyl isovalerate, 7-11% of kieselguhr, 0.01-0.03% of dipropylene glycol, 0.01-0.03% of allyl heptanoate, 0-0.2% of styrofoam acetate, 0.01-0.03% of diethyl phthalate, 0.01-0.03% of cycloethylene tridecanedioate, 0.99-1.01% of ethyl acetate, 1-9% of alpha-hexyl cinnamon, 0.6-1% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-benzotriazol chloride, 1 to 3 percent of nano titanium dioxide powder.
The preparation method of the odor masking agent for the furan resin sand for casting comprises the following steps:
s1: sequentially adding anhydrous methanol, diethylene glycol, dipropylene glycol, diethyl phthalate and ethyl acetate into a reaction kettle, and uniformly stirring at the rotating speed of 500-800 r/min;
s2: then treating glyceryl triacetate, convallaldehyde, peach aldehyde, benzyl salicylate, ethyl isovalerate, diatomite, allyl heptanoate, styrallyl acetate, triethylene glycol tridecanedioate, alpha-hexyl cinnamaldehyde, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and nano titanium dioxide powder, adding into a reaction kettle, and stirring for 30-60 min; the rotating speed is 800-1200 r/min.
The furan resin containing the odor masking agent is prepared by adding the odor masking agent for the casting furan resin sand into a finished product of furan resin and stirring, wherein the rotating speed during stirring is 60-120 r/min, and the stirring time is 30-60 min.
Example 1
Anhydrous methanol 15%, glyceryl triacetate 30%, diethylene glycol 30%, lilial 2%, peach aldehyde 2%, benzyl salicylate 3%, ethyl isovalerate 0.02%, diatomite 10%, dipropylene glycol 0.02%, allyl heptanoate 0.02%, styryl acetate 0.01%, diethyl phthalate 0.02%, triethylene glycol tridecyl acetate 0.02%, ethyl acetate 1%, alpha-hexyl cinnamon 4%, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole 0.89%, and nano titanium dioxide powder 2%.
Adding 1500g of anhydrous methanol, 3000g of diethylene glycol, 2g of dipropylene glycol, 2g of diethyl phthalate and 100g of ethyl acetate into a 50L reaction kettle in sequence, and stirring at the rotating speed of 500-800 r/min for 10-20 min. And adding 3000g of glyceryl triacetate, 200g of convallaria majalis, 200g of peach aldehyde, 300g of benzyl salicylate, 2g of ethyl isovalerate, 1000g of diatomite, 2g of allyl heptanoate, 1g of styryl acetate, 2g of triethylene tridecanedioate, 400g of alpha-hexyl cinnamaldehyde, 89g of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and 200g of nano titanium dioxide powder into a reaction kettle after being treated by a special process, starting stirring at the rotating speed of 800-1200 r/min for 30-60 min, and taking out of the kettle to obtain the special odor-blocking agent for furan resin sand.
And II, adding the obtained special odor masking agent for furan resin sand into the finished product of furan resin, and stirring (the addition amount of the odor masking agent accounts for 2 per mill of the weight of the resin), wherein the rotating speed is 60-80 r/min, and the stirring time is 30-60 min, so that the furan resin containing the odor masking agent is obtained.
And III, spraying a proper amount of the odor masking agent in the molding and pouring places of the furan resin sand.
The free formaldehyde content of the furan resin binder containing the odor masking agent is 0.02 percent, and the formaldehyde content of the furan resin binder containing the odor masking agent is 5.00ppm measured by a formaldehyde detector in the molding process; measuring the formaldehyde content to be 3.45ppm by using a formaldehyde detector in the pouring process; and has no obvious irritant formaldehyde smell, toluene or xylene smell and furan resin smell on site, and has light fruit fragrance instead.
Example 2
20% of anhydrous methanol, 28% of glyceryl triacetate, 28% of diethylene glycol, 2% of lilial, 2% of peach aldehyde, 3% of benzyl salicylate, 0.02% of ethyl isovalerate, 8% of diatomite, 0.02% of dipropylene glycol, 0.02% of allyl heptanoate, 0.01% of styrofoam acetate, 0.02% of diethyl phthalate, 0.02% of triethylene glycol tridecanoate, 1% of ethyl acetate, 4% of alpha-hexyl cinnamon, 0.89% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole chloride and 3% of nano titanium dioxide powder.
Adding 2000g of anhydrous methanol, 2800g of diethylene glycol, 2g of dipropylene glycol, 2g of diethyl phthalate and 100g of ethyl acetate into a 50L reaction kettle in sequence, and stirring at the rotating speed of 500-800 r/min for 10-20 min. 2800g of glyceryl triacetate, 200g of convallaria majalis, 200g of peach aldehyde, 300g of benzyl salicylate, 2g of ethyl isovalerate, 800g of diatomite, 2g of allyl heptanoate, 1g of styryl acetate, 2g of triethylene tridecanedioate, 400g of alpha-hexyl cinnamaldehyde, 89g of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and 300g of nano titanium dioxide powder are added into a reaction kettle after being treated by a special process, stirring is started, the rotation speed is 800-1200 r/min, and the stirring time is 30-60 min, and then the special odor-blocking agent for furan resin sand is obtained.
And II, adding the obtained special odor masking agent for furan resin sand into the finished product of furan resin, and stirring (the addition amount of the odor masking agent accounts for 2 per mill of the weight of the resin), wherein the rotating speed is 60-80 r/min, and the stirring time is 30-60 min, so that the furan resin containing the odor masking agent is obtained.
And III, spraying a proper amount of the odor masking agent in the molding and pouring places of the furan resin sand.
The free formaldehyde content of the furan resin binder containing the odor masking agent is 0.03 percent, and the formaldehyde content of the furan resin binder containing the odor masking agent is 5.23ppm measured by a formaldehyde detector in the molding process; measuring the formaldehyde content to be 4.15ppm by using a formaldehyde detector in the casting process; and has no obvious irritant formaldehyde smell, toluene or xylene smell and furan resin smell on site, and has light fruit fragrance instead.
Example 3
18% of anhydrous methanol, 26% of glyceryl triacetate, 32% of diethylene glycol, 2% of lilial, 2% of peach aldehyde, 3% of benzyl salicylate, 0.02% of ethyl isovalerate, 9% of diatomite, 0.02% of dipropylene glycol, 0.02% of allyl heptanoate, 0.01% of styrofoam acetate, 0.02% of diethyl phthalate, 0.02% of triethylene glycol tridecanoate, 1% of ethyl acetate, 4% of alpha-hexyl cinnamon, 0.89% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole chloride and 2% of nano titanium dioxide powder.
Adding 1500g of anhydrous methanol, 3000g of diethylene glycol, 2g of dipropylene glycol, 2g of diethyl phthalate and 100g of ethyl acetate into a 50L reaction kettle in sequence, and stirring at the rotating speed of 500-800 r/min for 10-20 min. And then 2600g of glyceryl triacetate, 200g of convallaria majalis, 200g of peach aldehyde, 300g of benzyl salicylate, 2g of ethyl isovalerate, 900g of diatomite, 2g of allyl heptanoate, 1g of styryl acetate, 2g of triethylene tridecanedioate, 400g of alpha-hexyl cinnamaldehyde, 89g of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and 200g of nano titanium dioxide powder are added into a reaction kettle after being treated by a special process, stirring is started, the rotation speed is 800-1200 r/min, and the stirring time is 30-60 min, so that the special odor-shielding agent for furan resin sand is obtained.
And II, adding the obtained special odor masking agent for furan resin sand into the finished product of furan resin, and stirring (the addition amount of the odor masking agent accounts for 2 per mill of the weight of the resin), wherein the rotating speed is 60-80 r/min, and the stirring time is 30-60 min, so that the furan resin containing the odor masking agent is obtained.
And III, spraying a proper amount of the odor masking agent in the molding and pouring places of the furan resin sand.
The free formaldehyde content of the furan resin binder containing the odor masking agent is 0.01 percent, and the formaldehyde content of the furan resin binder containing the odor masking agent is 5.11ppm measured by a formaldehyde detector in the molding process; measuring the formaldehyde content to be 3.23ppm by using a formaldehyde detector in the casting process; and has no obvious irritant formaldehyde smell, toluene or xylene smell and furan resin smell on site, and has light fruit fragrance instead.
Example 4
12% of anhydrous methanol, 32% of glyceryl triacetate, 34% of diethylene glycol, 2% of lilial, 2% of peach aldehyde, 3% of benzyl salicylate, 0.02% of ethyl isovalerate, 7% of diatomite, 0.02% of dipropylene glycol, 0.02% of allyl heptanoate, 0.01% of styrofoam acetate, 0.02% of diethyl phthalate, 0.02% of triethylene glycol tridecanoate, 1% of ethyl acetate, 4% of alpha-hexyl cinnamon, 0.89% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole chloride and 2% of nano titanium dioxide powder.
I, sequentially adding 1200g of anhydrous methanol, 3400g of diethylene glycol, 2g of dipropylene glycol, 2g of diethyl phthalate and 100g of ethyl acetate into a 50L reaction kettle, and stirring at the rotating speed of 500-800 r/min for 10-20 min. And then 3400g of glyceryl triacetate, 200g of convallaria majalis, 200g of peach aldehyde, 300g of benzyl salicylate, 2g of ethyl isovalerate, 700g of diatomite, 2g of allyl heptanoate, 1g of styryl acetate, 2g of triethylene tridecanedioate, 400g of alpha-hexyl cinnamaldehyde, 89g of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and 200g of nano titanium dioxide powder are added into a reaction kettle after being treated by a special process, stirring is started, the rotation speed is 800-1200 r/min, and the stirring time is 30-60 min, so that the special odor-shielding agent for furan resin sand is obtained.
And II, adding the obtained special odor masking agent for furan resin sand into the finished product of furan resin, and stirring (the addition amount of the odor masking agent accounts for 2 per mill of the weight of the resin), wherein the rotating speed is 60-80 r/min, and the stirring time is 30-60 min, so that the furan resin containing the odor masking agent is obtained.
And III, spraying a proper amount of the odor masking agent in the molding and pouring places of the furan resin sand.
The free formaldehyde content of the furan resin binder containing the odor masking agent is 0.04 percent, and the formaldehyde content of the furan resin binder containing the odor masking agent is 6.23ppm measured by a formaldehyde detector in the molding process; measuring the formaldehyde content by a formaldehyde detector to be 3.10ppm in the casting process; and has no obvious irritant formaldehyde smell, toluene or xylene smell and furan resin smell on site, and has light fruit fragrance instead.
Example 5
10% of anhydrous methanol, 40% of glyceryl triacetate, 25% of diethylene glycol, 2% of lilial, 2% of peach aldehyde, 3% of benzyl salicylate, 0.02% of ethyl isovalerate, 11% of diatomite, 0.02% of dipropylene glycol, 0.02% of allyl heptanoate, 0.01% of styrofoam acetate, 0.02% of diethyl phthalate, 0.02% of triethylene glycol tridecanoate, 1% of ethyl acetate, 4% of alpha-hexyl cinnamon, 0.89% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole chloride and 1% of nano titanium dioxide powder.
I, sequentially adding 1000g of anhydrous methanol, 2500g of diethylene glycol, 2g of dipropylene glycol, 2g of diethyl phthalate and 100g of ethyl acetate into a 50L reaction kettle, and stirring at the rotating speed of 500-800 r/min for 10-20 min. And then 4000g of glyceryl triacetate, 200g of convallaria majalis, 200g of peach aldehyde, 300g of benzyl salicylate, 2g of ethyl isovalerate, 1100g of diatomite, 2g of allyl heptanoate, 1g of styryl acetate, 2g of triethylene tridecanedioate, 400g of alpha-hexyl cinnamaldehyde, 89g of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and 100g of nano titanium dioxide powder are added into a reaction kettle after being treated by a special process, stirring is started, the rotating speed is 800-1200 r/min, and the stirring time is 30-60 min, so that the special odor-shielding agent for furan resin sand is obtained.
And II, adding the obtained special odor masking agent for furan resin sand into the finished product of furan resin, and stirring (the addition amount of the odor masking agent accounts for 2 per mill of the weight of the resin), wherein the rotating speed is 60-80 r/min, and the stirring time is 30-60 min, so that the furan resin containing the odor masking agent is obtained.
And III, spraying a proper amount of the odor masking agent in the molding and pouring places of the furan resin sand.
The free formaldehyde content of the furan resin binder containing the odor masking agent is 0.05 percent, and the formaldehyde content of the furan resin binder containing the odor masking agent is 7.11ppm measured by a formaldehyde detector in the molding process; measuring the formaldehyde content to be 4.11ppm by using a formaldehyde detector in the casting process; and has no obvious irritant formaldehyde smell, toluene or xylene smell and furan resin smell on site, and has light fruit fragrance instead.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The odor masking agent for the casting furan resin sand is characterized by comprising, by weight, 10-20% of anhydrous methanol, 20-40% of glyceryl triacetate, 15-45% of diethylene glycol, 1-3% of lilial, 1-3% of peach aldehyde, 1-6% of benzyl salicylate, 0.01-0.03% of ethyl isovalerate, 7-11% of kieselguhr, 0.01-0.03% of dipropylene glycol, 0.01-0.03% of allyl heptanoate, 0-0.2% of storax acetate, 0.01-0.03% of diethyl phthalate, 0.01-0.03% of triethylene glycol tridecanoate, 0.99-1.01% of ethyl acetate, 1-9% of alpha-hexyl cinnamon, 0.6-1% of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole, 1 to 3 percent of nano titanium dioxide powder.
2. A method for preparing the odor masking agent for foundry furan resin sand of claim 1, comprising the steps of:
s1: sequentially adding anhydrous methanol, diethylene glycol, dipropylene glycol, diethyl phthalate and ethyl acetate into a reaction kettle, and uniformly stirring;
s2: and then treating glyceryl triacetate, convallaldehyde, peach aldehyde, benzyl salicylate, ethyl isovalerate, diatomite, allyl heptanoate, styrallyl acetate, triethylene glycol tridecanedioate, alpha-hexyl cinnamaldehyde, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole and nano titanium dioxide powder, adding into a reaction kettle, and stirring for 30-60 min to obtain the finished product.
3. The method for preparing the odor masking agent for furan resin sand casting as claimed in claim 2, wherein the rotation speed of the stirring kettle in S1 is 500-800 r/min.
4. The method for preparing the odor masking agent for furan resin sand casting as claimed in claim 2, wherein the rotation speed of the stirring kettle in S2 is 800-1200 r/min.
5. A furan resin containing a taste-masking agent, characterized in that the furan resin containing the taste-masking agent is prepared by adding the taste-masking agent for foundry furan resin sand according to any one of claims 1 to 4 to a finished furan resin and stirring the mixture.
6. The furan resin with taste-masking agent as claimed in claim 5, wherein the rotation speed during stirring is 60-120 r/min, and the stirring time is 30-60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700316.4A CN110479952B (en) | 2019-07-31 | 2019-07-31 | Odor masking agent for furan resin sand for casting and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910700316.4A CN110479952B (en) | 2019-07-31 | 2019-07-31 | Odor masking agent for furan resin sand for casting and preparation method thereof |
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| CN110479952A CN110479952A (en) | 2019-11-22 |
| CN110479952B true CN110479952B (en) | 2020-11-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5545825A (en) * | 1993-05-19 | 1996-08-13 | Schuller International, Inc. | Low VOC furan resins and method of reducing VOCs in furan resins |
| CN1379062A (en) * | 2002-04-10 | 2002-11-13 | 山东省桓台东源化工厂 | Fragrant furan resin and its preparing process |
| CN102802833A (en) * | 2010-03-18 | 2012-11-28 | 花王株式会社 | Binder composition for use in mold manufacturing |
| CN103567365A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Furan resin self-hardening sand for casting and preparation method thereof |
| CN108727549A (en) * | 2018-05-29 | 2018-11-02 | 宁夏共享化工有限公司 | A kind of modified urea-formaldehyde furane resins |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9662637B2 (en) * | 2013-10-31 | 2017-05-30 | Xiwang Qi | Nano-structured composite absorber for air detoxing and deodoring |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5545825A (en) * | 1993-05-19 | 1996-08-13 | Schuller International, Inc. | Low VOC furan resins and method of reducing VOCs in furan resins |
| CN1379062A (en) * | 2002-04-10 | 2002-11-13 | 山东省桓台东源化工厂 | Fragrant furan resin and its preparing process |
| CN102802833A (en) * | 2010-03-18 | 2012-11-28 | 花王株式会社 | Binder composition for use in mold manufacturing |
| CN103567365A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Furan resin self-hardening sand for casting and preparation method thereof |
| CN108727549A (en) * | 2018-05-29 | 2018-11-02 | 宁夏共享化工有限公司 | A kind of modified urea-formaldehyde furane resins |
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| CN110479952A (en) | 2019-11-22 |
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