Acid of sulphur of summary aromatic hydrocarbon is from hard furan colophony optimal solidify agent, also be to use one of sort of most solidify agent at present, relative to the solidify agent at tall dissociate acid, it more be helpful for raising the later period intensity with furan arenaceous colophony and colophony sand mold (core) tenacity. Improve in furan colophony craft at present in, more is to reduce furan resinous branny mellow content, achieve thereby reduce furan resinous to produce cost purpose. The article tries to use condensate of sulphonating ketone aldehyde to come modified furan colophony achieves afore-mentioned improvement of furan colophony and solidify agent dual-purpose. With colophony of furan of modified of condensate of sulphonating ketone aldehyde, can reduce furan resinous branny mellow content is managing cost; Be in at the same time in mixing arenaceous process, the dissociate in solidify agent is acerbity the sulphur of the sulphonating condensate in this colophony the salt of acid radical turns sulphur into acid radical, was equivalent to reducing the free acid content in solidify agent, improved the performance of furan colophony arenaceous core and sand mold. Be opposite in article condition of craft of synthesis of condensate of aldehyde of this sulphonating ketone and respect of adaptability of modified furan resinous undertake study, reach relatively the synthetic condition of beautiful: Organic ketone F and aldehyde Maerbi 1 ∶ 4, maerbi is sulphonating reagent S and organic ketone F 1 ∶ 0.3; Condensate of aldehyde of this sulphonating ketone relatively the nitrogen in applying to and modified of resinous of low nitrogen furan. At present furan colophony all added modifier, basically use resin of furan of modified of phenolic aldehyde colophony without azotic furan colophony among them, and low nitrogen, medium nitrogen and colophony of tall nitrogen furan basically are with colophony of furan of modified of Niao aldehyde colophony. Reducing one of methods of furan colophony cost basically is to reduce branny mellow content most. At present agent of furan colophony solidify basically is to contain vitriolic industry organic useless acid. To colophony of furan of medium, low nitrogen, best solidify agent should be agent of solidify of the toluene of low dissociate acid or xylene sulphur acid, but cost of this solidify agent is higher. Document reports colophony of furan of modified of ketone aldehyde colophony, can reduce content of furan colophony branny alcohol. The article is to use the hydrolyze of sulphonating reagent S to show alkalescent reach sulphonating action, control the addition of organic ketone F and formaldehyde and condensation polymerization response, synthesis goes out have relatively macromolecule quantity, much hydroxyl and much sulphonate base condensate of sulphonating ketone aldehyde, use condensate of aldehyde of this sulphonating ketone to replace partial furan colophony to synthesize Central Africa reactivity next branny alcohol, a future life produces resin of furan of modified of condensate of sulphonating ketone aldehyde. In process of furan colophony solidify, acid radical may attend the much hydroxyl in condensate of aldehyde of this sulphonating ketone and sulphur reaction of furan colophony solidify. Condensate of aldehyde of ketone of article use sulphonating comes modified furan colophony, those who inspect condensate of sulphonating ketone aldehyde to synthesize raw material is optimal deserve to compare and differ add a quantity to contain effect of modified of azotic furan resinous to differring, reach thereby suitable scope of resinous of furan of modified of this sulphonating condensate. 1 test data and method main raw material has 1.1 experiments instrument and raw material: Alkyl of silicon of S of reagent of F of formaldehyde of the much polyformaldehyde of branny alcohol, 95%~96% , 37% liquids, organic ketone, sulphonating, lasting effect 602, soda acid activator, right acerbity mother liquor of methylic benzene sulfur (total acidity 35% , free is acerbity 12.5% ) , agent of furan colophony solidify (the total acidity of former solidify agent 42.5% , free is acerbity 35% , can undertake adjustment to acidity of corresponding solidify agent according to modified furan index) , sand mold (core) with arenaceous look for Heibei paddock 50~100 wait to all be industrial level raw material. Main instrument: Vitreous instrument, electric heat of DHT agitate temperature adjustment is covered; Hydraulic pressure is all-purpose pull test machine; PHS-2C acidity plan wait. 1.2 colophony contain azotic quantity and free aldehyde to detect the quantity containing nitrogen in index of methodological furan colophony and method of free aldehyde assay refer to document. Synthesis of semi-manufactured goods of colophony of furan of 1.3 tall nitrogen synthesizes the quantity that contain nitrogen to be the colophony of tall nitrogen furan of 10% with traditional method, regard modified furan resinous as semi-manufactured goods. Specific method of synthesis of semi-manufactured goods of colophony of tall nitrogen furan can refer to document. Colophony of the 1.4 furan that do not have nitrogen joins certain amount phenol and formaldehyde to the middle of 3 bottle, tone PH is alkalescent, it is certain to warm up to react to 85~90 ℃ time, join certain amount branny alcohol to be moved to acid reaction next, fill finally add free sex branny alcohol, thereby preparation gives phenol content the modified of phenolic aldehyde colophony of 15% does not have azotic colophony. Principle of synthesis of condensate of aldehyde of 1.5 sulphonating ketone and preparation of modified furan colophony use sulphonating reagent S to be shown in the hydrolyze in the system alkalescent, aldehyde ketone condensation undertakes in this ketone that lively hydrogen has below basic requirement and the formaldehyde that do not have lively hydrogen, be opposite again as a result of sulphonating reagent S at the same time the carbonyl in child of aldehyde ketone condensation undertakes sulphonating addition reacts, introduce sulphur acid in molecular structure thereby base, go further below acidity activator action next condensation dehydrate, get having relatively condensate of aldehyde of ketone of macromolecule quantity sulphonating. Differ according to furan colophony the requirement of the quantity that contain nitrogen, use 1.3 synthesis (namely above 1.3 medium synthesis methods, specific see bibliographical reference) semi-manufactured goods of colophony of tall nitrogen furan and condensate of sulphonating ketone aldehyde answer match, preparation gives colophony of furan of modified of condensate of sulphonating ketone aldehyde. 1.6 colophony arenaceous intensity detects methodological metage is measured certainly arenaceous, join next occupy colophony to measure the solidify agent of 50% (the experiment compares same condition to issue sand mold of colophony of furan of modified of condensate of different ketone aldehyde (core) tensile strength, here chooses commonly used solidify agent to join a quantity to undertake comparative only, namely solidify agent joins a quantity to occupy colophony to measure 50% ) mix agreement 0.5 Min with sand, rejoin takes arenaceous amount the furan colophony of 1.5% mixes agreement 1 Min. What will mixed is arenaceous fill up standard “∞” piece in the mould, calculate from drawing of patterns case, the early days that inspects 2 H and colophony of 24 H later period are arenaceous (core) intensity. 2 results analysis and discuss 2.1 formaldehyde and organic ketone F the influence trial that Maerbi reachs function of modified furan colophony to condensate secures organic ketone F and sulphonating agent S Maerbi (1 ∶ 0.25) , change the Maerbi of organic ketone F and formaldehyde, the condensate of sulphonating ketone aldehyde that inspects its to go out to synthesis reachs the influence of function of modified furan colophony, if the result is expressed 1 with the graph 1. Express 1 aldehyde and ketone Maerbi is right condensate and function of modified furan colophony are affected

Graph 1 condensate aldehyde ketone Maerbi affects to function of modified furan colophony from the watch 1 reach a figure 1 can see: When aldehyde and ketone when Maerbi is lesser, this condensate viscosity is big, cloudy, statified, the raw material that has more dissociate at the same time (ketone) without reaction, but increase as aldehyde and ketone scale, condensate has better outward appearance, can raise furan colophony with colophony of furan of this condensate modified at the same time model (core) arenaceous before, later period intensity, at the same time with not the furan colophony photograph of modified is compared, can raise furan colophony with colophony of furan of this condensate modified model (core) arenaceous before, later period intensity, and branny mellow content has relatively reduce substantially, but as aldehyde ketone Maerbizeng arrives greatly 4 ∶ 1 continue to increase, content of aldehyde of the dissociate in this condensate increases bigger, integrated consideration, aldehyde ketone Maerbi with 4 ∶ 1 for optimal, among them in the condensate of this scale preparation tallish dissociate aldehyde, can make an appointment with through adding 0.5% fall aldehyde agent will reduce the free aldehyde in condensate. The scale that S of 2.2 sulphonating agent and organic ketone F compare pair of condensate function and influence of function of modified furan colophony to secure organic ketone F and formaldehyde is 1 ∶ 4, change the scale of organic ketone F and sulphonating agent S, if the influence result of arenaceous intensity of the property of condensate of sulphonating ketone aldehyde that inspects its to go out to synthesis and modified furan colophony is expressed 2 with the graph 2. Express dosage of 2 sulphonating agent to be opposite condensate and influence of function of modified furan colophony Graph Maerbi is opposite reagent of 2 condensate sulphonating and ketone function of modified furan colophony affects from the watch 2 reach a figure 2 can see: The Maerbi when sulphonating agent S and ketone F from 0.15 increase 0.4 when, all can get the sulphonating condensate with better outward appearance, at the same time arenaceous intensity of modified furan colophony increases first, reduce next; And in sulphonating agent S and ketone F Maerbi is 0.45 with 0.55 when, the condensate of preparation is muddy and statified. Accordingly, s of first-rate sulphonating agent and ketone F scale are 0.25~0.35. Experiment of adaptability of resinous of furan of modified of condensate of aldehyde of 2.3 sulphonating ketone reachs an analysis according to afore-mentioned experiments knowable, optimal synthesis condition is condensate of sulphonating ketone aldehyde: Formaldehyde of ketone F ∶ Maerbi 1 ∶ 4; Maerbi is F of ketone of ∶ of sulphonating agent S 0.3 ∶ 1. Make up with semi-manufactured goods of colophony of tall nitrogen furan contain nitrogen to be 7% (tall nitrogen) , contain nitrogen to be 4% (in nitrogen) , contain nitrogen to be 2.8% , 1.7% (low nitrogen) reach the colophony that do not have nitrogen colophony of 5 kinds of different and phyletic furan, inspect this sulphonating condensate to be opposite different index (azotic content) the adaptability influence of furan colophony modified, if test result expresses 3-7. Express 3 condensate to add a quantity to be opposite colophony of tall nitrogen furan (nitrogen 7% ) of function affect Colophony of furan of the nitrogen in expressing 4 condensate to add a quantity to be opposite (nitrogen 4% ) of function affect Express 5 condensate to add a quantity to be opposite low nitrogen furan (nitrogen 2.8% ) of function affect Express 6 condensate to add a quantity to be opposite low nitrogen furan (nitrogen 1.7% ) of function affect Express 7 condensate to add a quantity to be opposite the influence that does not have function of azotic furan colophony Add a capacity from condensate of sulphonating ketone aldehyde branny to the different colophony that contain nitrogen mellow content and colophony (core) in light of influence of arenaceous tensile strength, reach the following conclusion, (1) colophony of tall nitrogen furan (N: 7% ) after modified, the colophony of tall nitrogen furan of modified of preparation of condensate of aldehyde of ketone of branny mellow content still has fair applicable value. (2) in azotic furan colophony (N: 4% ) when 10%~15% of content of condensate of sulphonating ketone aldehyde, branny mellow content was reduced in furan colophony 10% the left and right sides, colophony (core) arenaceous around period intensity is basic and changeless. Accordingly, modified of colophony of furan of the nitrogen in be opposite with condensate of aldehyde of this sulphonating ketone has better effect. (3) to colophony of low nitrogen furan (N: 2.8% and 1.7% ) , add the addition of the quantity as content of condensation polymerization of aldehyde of this sulphonating ketone, branny mellow content is reduced apparently in furan colophony, to colophony model (core) arenaceous strength effect is lesser, effect of modified of colophony of furan of because this this sulphonating condensate is right low nitrogen is optimal. (4) to having azotic furan colophony for, do not have azotic colophony with preparation of modified of condensate of sulphonating ketone aldehyde, compare with the photograph of colophony of the furan that do not have nitrogen of the preparation of colophony of furan of modified of phenolic aldehyde colophony that at present industry uses, cost and function do not have an advantage basically. (5) the place on put together is narrated, differ with modified of condensate of sulphonating ketone aldehyde the furan colophony of index, better to effect of colophony of furan of medium, low nitrogen. Odd from reduce furan colophony raw material look on cost, better also to effect of modified of tall nitrogen colophony. 3 conclusion use resin of furan of modified of condensate of sulphonating ketone aldehyde, can reduce furan resinous branny mellow content is managing cost; The dissociate in solidify agent is acerbity at the same time the sulphur in this sulphonating condensate acid radical salt turns sulphur into acid, reduced the free acid content in solidify agent, improved the performance of furan colophony arenaceous core and sand mold. Complex of condensate of sulphonating ketone aldehyde is optimal raw material deserves to compare: Ketone F and formaldehyde Maerbi with 1 ∶ 4, ketone F and sulphonating reagent S Maerbi 1 ∶ 0.3 for optimal. Condensate of aldehyde of this sulphonating ketone suits to be opposite low nitrogen and in modified of azotic furan colophony, can reduce furan resinous already branny mellow content, won't affect colophony again model (core) arenaceous intensity.