News Details
Crosslinking agent for sulfonate coating
2017-7-26 17:57:40
Crosslinking agent for sulfonate coating
Sulfonic acid coating crosslinking agent is compatible with resin.
Several kinds of sulfonic acid crosslinking agents are commonly used in domestic production. According to the seasonal classification, the hardening speed of self-hardening sand can be adjusted by adjusting the type of sulfonate crosslinking agent and the amount of added.
The silane can increase the adhesion strength of the resin and the original sand, thus reducing the resin consumption by a third or so. At the same time, silane can improve the moisture resistance of resin sand. Silane can hydrolyze and become high polymer precipitation, so its enhancement effect decreases with time, so it is better to add silane before use, and then use immediately after stirring evenly.
The characteristics of the hard furan resin sand
1. Advantages:
1) the surface of the casting is clear, angular and accurate.
2) the scattering of sand is good, cleaning and polishing is easy, thus reducing the damage of the casting shape precision in the finishing process of sand cleaning.
3) due to the utmost in every process of ruled out the influencing factors of mould, casting deformation and damage, so the casting surface quality of the resin sand casting, casting geometry precision than clay can increase 1 ~ 2 level, reached the CT7 ~ 9 level precision and 1 ~ 2 mm / 600 mm of straightness, roughness is improved;
Chinese name: Diethyl toluene diamine(DETDA)
Sulfonic acid coating crosslinking agent is compatible with resin.
Several kinds of sulfonic acid crosslinking agents are commonly used in domestic production. According to the seasonal classification, the hardening speed of self-hardening sand can be adjusted by adjusting the type of sulfonate crosslinking agent and the amount of added.
The silane can increase the adhesion strength of the resin and the original sand, thus reducing the resin consumption by a third or so. At the same time, silane can improve the moisture resistance of resin sand. Silane can hydrolyze and become high polymer precipitation, so its enhancement effect decreases with time, so it is better to add silane before use, and then use immediately after stirring evenly.
The characteristics of the hard furan resin sand
1. Advantages:
1) the surface of the casting is clear, angular and accurate.
2) the scattering of sand is good, cleaning and polishing is easy, thus reducing the damage of the casting shape precision in the finishing process of sand cleaning.
3) due to the utmost in every process of ruled out the influencing factors of mould, casting deformation and damage, so the casting surface quality of the resin sand casting, casting geometry precision than clay can increase 1 ~ 2 level, reached the CT7 ~ 9 level precision and 1 ~ 2 mm / 600 mm of straightness, roughness is improved;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
4) reducing labor intensity greatly improves working conditions and working environment, especially reducing noise, silica dust, etc., reducing environmental pollution;
5) resin sand mold (core) high strength (including high temperature and high strength), good formability, gas evolution was lower than those of other organic casting, good thermal stability, good air permeability, can greatly reduce the adhering sand casting, sand inclusion, sand holes, blow hole, shrinkage cavity, the casting defects such as cracks, so as to reduce the rejection rate, can make use of clay sand to make complex parts, key-module;
6) it is easy to achieve regeneration recovery rate of about 90% in old sand recovery. It is effective in saving new sand, reducing transportation and preventing waste pollution.
2. Disadvantages:
1) there are strict requirements on the original sand, such as grain size, grain shape, SiO2 content, micropowder content, alkali metal salt and clay content, etc.
2) the effect of temperature and humidity on the speed of hardening and the strength of the crosslinking is greater.
3) compared with the cast type of inorganic binder, resin sand has a high volume of air, such as improper measures, which can easily produce stoma type defects.
4) compared with clay sand, the cost is still higher;
5) for castings such as ball iron or low carbon stainless steel, the surface may be caused by carburizing or carburizing, which may result in spheroidization or increase of carbon, which can produce cracks and other defects on thin wall complex cast steel parts;
6) the irritant smell and some harmful gases occur in the pouring, and the amount of CO gas is larger and requires good ventilation conditions.
Original sand: the original sand quality has great influence on resin dosage, resin sand strength and quality of casting.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
4) reducing labor intensity greatly improves working conditions and working environment, especially reducing noise, silica dust, etc., reducing environmental pollution;
5) resin sand mold (core) high strength (including high temperature and high strength), good formability, gas evolution was lower than those of other organic casting, good thermal stability, good air permeability, can greatly reduce the adhering sand casting, sand inclusion, sand holes, blow hole, shrinkage cavity, the casting defects such as cracks, so as to reduce the rejection rate, can make use of clay sand to make complex parts, key-module;
6) it is easy to achieve regeneration recovery rate of about 90% in old sand recovery. It is effective in saving new sand, reducing transportation and preventing waste pollution.
2. Disadvantages:
1) there are strict requirements on the original sand, such as grain size, grain shape, SiO2 content, micropowder content, alkali metal salt and clay content, etc.
2) the effect of temperature and humidity on the speed of hardening and the strength of the crosslinking is greater.
3) compared with the cast type of inorganic binder, resin sand has a high volume of air, such as improper measures, which can easily produce stoma type defects.
4) compared with clay sand, the cost is still higher;
5) for castings such as ball iron or low carbon stainless steel, the surface may be caused by carburizing or carburizing, which may result in spheroidization or increase of carbon, which can produce cracks and other defects on thin wall complex cast steel parts;
6) the irritant smell and some harmful gases occur in the pouring, and the amount of CO gas is larger and requires good ventilation conditions.
Original sand: the original sand quality has great influence on resin dosage, resin sand strength and quality of casting.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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