硅酸乙酯-40 CAS11099-06-2

硅酸乙酯

性质:

化学组成通式:(C2H5O)2n+2SInOn-1

常温下为无色或淡黄色透明液体,具有类似*的味道。能与乙醇、丙醇等有机溶剂互溶,能与水发生水解反应生成硅酸溶胶并放出热量,在潮湿空气中变浑浊,静止后澄清,无毒。

用途:

随着科学技术的不断进步,硅酸乙酯系列产品的应用将更加广泛,特别是熔模精密铸造使其工艺具有下属特点和其他优越性。

1.  可以制造一切合金铸件,特别是难以进行机械加工的耐热和高硬度的合金。

2.  由于没有分型面,所以铸件表面质量高。

3.  铸件外型尺寸及其精确,表面光洁度高,因而大大节省了金属材料加工费用。

4.  可以铸造各种复杂形状的成型零件。

5.  各种耐火用的粘合剂。

6.  是制造高档、防腐、*性油漆的*材料。

综上所述,硅酸乙酯系列产品在现代国民经济的许多部门,如航空、仪表、船舶、汽车、拖拉机、机床、汽轮机、电讯机械、刀具、武器等制造行业,深受国内外用户和技术专家的充分肯定,将越来越广泛的应用。

工业品硅酸乙酯(俗称硅酸乙酯32%)

质量标准:

外观:无色或微黄色透明液体

比重:d420 0.94~0.98

酸度:(以卤化氢计%):≤0.1

二氧化硅含量(%):32~34

该产品主要用以陶瓷模精密铸造的水解液粘合剂,硅酸乙酯本身不是粘合剂,他必须经过水解成为水解液,才具有粘结能力。因此,所谓硅酸乙酯粘合剂是指硅酸乙酯的水解液在熔模精密铸造工艺中涂覆于可熔性模型上的特质耐火材料,就是由硅酸乙酯水解液和粉状耐火材料,配制成而成的。

硅酸乙酯水解液,就是硅酸乙酯与水的反应,实质上式硅酸乙酯分子中乙氧基(C2H5O-)被水分子中的氢氧根(-OH)所置换的过程。具体地说,这个过程式硅酸乙酯通过溶剂(乙醇)和催化剂(盐酸)的作用与水发生反应的全过程。

缩硅酸乙酯(俗称硅酸乙酯40%)

质量标准:

外观:无色或微黄色透明液体

比重:d4201.04~1.07

酸度:(以卤化氢计%):≤0.1

二氧化硅含量(%):38~42

该产品二氧化硅含量比工业硅酸乙酯高,如为制取强度特性同样的铸件中,硅酸乙酯用量将相应减少,可降低成本,国外熔模精密度制造主要用该产品。该产品也是生产高质量、海轮防腐有机硅油漆的*进的原料,使用该产品生产的油漆具有防腐、防雨、保护光泽等特点。

正硅酸乙酯(俗称硅酸乙酯28%)

质量标准:

外观:无色或微黄色透明液体

比重:d420 0.64~0.93

酸度:(以卤化氢计%):≤0.1

二氧化硅含量(%):28~30

该产品主要以生产试剂和一般性熔模精密铸造中,也可制造高档航空润滑剂。

注意事项

1. 硅酸乙酯系列产品虽属于无毒产品,但毕竟是化学原料,因此应避免接触皮肤或进入体内,如有发生,应用水清洗。

包装保管运输

1. 本产品装于200公斤干燥、干净、密封的镀锌桶内,也可按照用户要求进行包装。

2. 储存过程中应有遮盖物,避免日照、雨淋、受潮。

3. 本产品化学性稳定,运输按危险规84064号,避免猛烈撞击。

 

Ethy1 Silicate Series Products

Properties:

General formula of chemical composition: ( C ?H?O)2 ? , +2SI ? ,O ? ?1

Achromatic or pale yellow transparent liquid at normal temperature, with smell similar to that of sulfuric ether. Mutually soluble with such organic solvents as et thyl hydroxide and acetone, capable of hydrolytic reaction with water to generate sol silicate and release heat, becomesturbid in moist air, clarifies after becoming static, non-toxic.

Purposes

With continuous progress of science and technology, ethy1 silicate series products will be more extensively applied,especially in precision  investment casting, which enables its process to have the following features and other advantages.

1. Can manufacture all kinds of alloy castings, especially those heat-resistant and high-hardness alloys difficult for mechanical treatment;

2. Since there is no paring surface, quality of the casting surface is high

3. Physical dimension of the casting is extremely accurate, and finish degree of the casting surface is high, thus greatly saving metal materialand processing expense;

4. Can cast all kinds of formed parts with complicated shapes;

5. All kinds of binders for fire resistance;

6. Best material for producing top-grade, anti-corrosion, permanent paint.

In summary, in many sectors of modern national economy. eluding such manufacturing industries as aviation, instrument, vessel, automobiletractor, machine tools, turbines, telecom machinery, cutter and weapon, ethy1 silicate series products enjoy sufficient recognition from domestic and foreign users as well as technical experts,and will be more and more extensively applied.

Industry product ethyl silicate (popularly called ethyl silicate 32%

Quality standard:

Appearance: achromatic or slightly yellow transparent liquid. Specific gravity: d?20 0.940.98

Acidity: (calculated by hydrogen chloride %):<=0.1Content of silicon dioxide%: 32-34

This product is mainly an adhesive agent of the hydrolyzate for ceramic mould precision casting.Ethy1 silicate itself is not adhesive agent, inorder to obtain caking power it must be hydrolyzed into hydrolyzate. Therefore the so-called ethy1 silicate adhesive agent refers to the built-

for-purpose fire-proof material formed by applying the hydrolyzate of ethyl silicate on the meltable mould during the process of precisioninvestment casting, that is to say the ethyl silicate adhesive agent is prepared from hydrolyzate of ethyl silicate and powdery fire-proof material.

Hydrolyzate of ethy1 silicate is generated by reaction between ethyl silicate and water. In fact, it is a process in which the ethoxy (C?H?O-)inhe molecule of ethy1silicate is replaced by the hydroxyl(-OH) in water molecule. To be more specific, this process is the whole process inwhich the ethy1 silicate reacts with water through action of solvent(ethyl alcohol) and catalyst (hydrochloric acid).

Condensed ethyl silicate (popularly called ethyl silicate 40%)

Quality standard:

Appearance: achromatic or slightly yellow transparent liquid. Specific gravity d?20 1.04-1.07

Acidity: (calculated by hydrogen chloride %) <=0.1Content of silicon dioxide % 38~42

This product contains more silicon dioxide than industrial ethy1 silicate In preparing casting with

same strength property, use level of ethy1 silicate can be lowered accordingly, thus reducing cost.

Foreign countries mainly use this product in precision investment casting. This product is also the

most advanced raw material for producing high quality, sea-craft anti-corrosion organic silicon paint,

and paint produced using this product has such features as anti corrosion, rain protection and luster

maintenance.

Ethyl orthosilicate (popularly called ethyl silicate 28%)

Quality standard:

Appearance:achromatic or slightly yellow transparent liquid. Specific gravity: d? 20 0.64-0.93

Acidity:(calculated by hydrogen chloride %) <=0.1Content of silicon dioxide%:28~30

This product is mainly applied in producing reagent and general precision investment casing, and alsocan be used for producing top-grade aeroengine oil.

Precautions

1. Although ethy1 silicate series products are non-toxic, they are still chemical raw materials, thereforemeasures should be taken to prevent them from contacting skin or entering human body, and if accidentsnse with water.

Packaging, Storage and Transportation

This product is contained in 200kg dry, clean and sealed galvanized barrel, and can also be packaged asper requirement of user.

2. Provide covering during storage, and guard against sunlight, rain and damp.

3. This pro duct has stable chemical property, it should be transported according to hazard-related regulationNo 84064. and violent bouncing should be avoided.