Methyl Tin Mercaptide Introduction from Direct Factory

Brief Introduction

Methyl tin mercaptide is one of the three kinds of Organotin(methyl tin, butyl tin, and Octyl Tin). It is a transparent, clear, and viscous liquid with good compatibility with PVC（polyvinyl chloride ). It is a key stabilizer in the PVC heating process with very good pre-stability and post-stability, product transparency, high compatibility with other additives and raw materials, and excellent weatherability than other metal heat stabilizers.

It is compatible with weak polar oils such as C8-C12 fatty alcohol, C8-C12 fatty acid, phosphite fatty alcohol ester, and oil. It is non-flammable and has a low freezing point, it is a viscous liquid even at-20 ℃.

Methyl tin mercaptide is the most potential organotin product in the field of PVC extrusion, calendering, blow molding and injection molding because of its simple process and low cost.

The Main Application List

• PVC film (Heat shrinkable packaging film, printing film, calendering film, kindling film, etc.)
• PVC sheet (transparent soft and hard film, Christmas film, Advertising Film, compound film, etc.)
• PVC particles (granular materials, electronic communication equipment housing, etc.)
• PVC building materials (water pipes and fittings, chemical pipes, building materials, profiles, etc.)
• PVC medical appliances (infusion sets, etc.), food packaging materials, household appliances and other products

Quality Standard of Methyl Tin Mercaptide(GB/T 26026-2010)

• Chinese Name: 硫醇甲基锡PVC热稳定剂,有机锡热稳定剂
• English Name: Methyl Tin Mercaptide
• Chemical Structure Chemical Formula: C31H60O6S3Sn AND C22H44O4S2Sn
• Molecular formula: (CH3)nSn(SCH2COOC8H17)4-n
• CAS NO: 57583-35-4
• HS Code: 293090, ?381220, 2930909099, 2931900090, 3812399000
• Synonyms: Methyl tin mercaptide PVC Heat Stabilizer， Methyl tin isooctyl mercaptoacetate stabilizers， mercaptoacetate stabilizer， Organotin， Tin Stabilizer， Mercaptan Methyl Tin, Tin methylmercaptan, Monomethyltintris-(isooctylthioglycolate), DMTEHTG, Tin methylmercaptan heat stabilizer,

Mercaptan Methyl Tin Heat stabilizer is the best stable variety. The production method is as follows: Metal Tin is methylated with chloromethane under the action of temperature 210-240℃, pressure 1.0-1.3 MPA and Amine Phase-transfer catalyst, after disproportionation reaction, the content of trimethyltin chloride was controlled to be less than 0.1%, and then reacted with isooctyl mercaptoacetate. Organotin industrial varieties are mainly divided into methyl tin, butyl tin and Octyl Tin. Because of its simple process, low cost and excellent performance, Methyltin is the most potential organotin product. Applied to PVC extrusion, calendering, blow molding and injection molding of various products, with excellent initial coloring, transparency and thermal stability, polyvinyl chloride is a key additive for thin films, sheets, plates, granular materials, pipes, fittings and profiles.

The mixture of dimethyl Tin Mercaptan and Methyl Tin Mercaptan is mainly used in industrial products. The weight ratio of Mercaptan to dimethyl Tin Mercaptan is 20:80, and the stability of Mercaptan is excellent, dimethyl Tin Mercaptan exhibits better late stability. Methyl Tin Mercaptan is approved by US FDA (21CFR 178.2010) and BGA (II A, 4C). It can be used in food packaging materials and water pipes. Because of its excellent performance, it can be used in the processing of food-grade hard transparent products with high processing requirements.

Performance Index

• Dimethyltin bis(2-ethylhexyl mercaptoacetate) : <20%
• Methyltin tris(2-ethylhexyl mercaptoacetate) : <80%
• Specification?Color( Pt - Co value) : less than 30
• Viscosity(25℃), mPa·S:?60-90
• Special gravity( 25℃), g/cm3: 1.17 - 1.19
• Tin content( % ): 19.2 ± 0.5
• Physio-chemical Properties Appearance: transparent oily liquid (clear-light yellowish)

The Main Properties of Mercaptan Methyl Tin PVC?Stabilizer

1. Excellent Heat Stabilizer Properties

At present, no other type of PVC stabilizer can surpass it in thermal stability, it has excellent high-temperature color stabilizer and long-term dynamic stability. Therefore, it is the preferred PVC stabilizer for rigid PVC and is suitable for all homopolymers such as emulsions, suspensions and bulk PVC as well as polyvinyl chloride, graft polymers and copolymers.

2. Excellent transparency

Organotin PVC stabilizer has excellent transparency. Adopting the formula of Organotin, especially Methyl Tin Mercaptan Heat stabilizer, the product can be crystallized without albinism. For this reason, can be used for bottles, containers, bellows, various types of hard packaging containers, hoses, profiles, films and so on.

3. The product is non-toxic

Methyl Tin Mercaptan is a non-toxic and green stabilizer. Methyl Tin Mercaptan migrates very little in PVC. Methyl Tin Pvc stabilizer has been approved by the German federal health agency, the US Food and Drug Administration, the UK’s BPF?and Japan’s JHPA. So in the United States, Europe, Japan and other countries Mercaptan Methyl Tin is allowed for food and medical packaging PVC products and water pipes.

4. Good Compatibility

Mercaptan Methyl Tin Pvc stabilizer and PVC compatibility is good, in PVC complex is easy to disperse, its processing products in the long-term use will not precipitate. This will not affect the surface properties and electrical properties of the products. The compatibility of methyl tin with PVC is better than butyl tin and Octyl Tin.

5. Better Liquidity

Methyl Tin Mercaptan can improve the melt action of PVC and make PVC have good fluidity in processing. Its plasticizing effect on Resin is lower than that of mixed metal or lead salt stabilizer, methyltin is the best heat stabilizer for rigid PVC mixtures.

6. Good Resistance to Scaling

The use of Methyl Tin Mercaptan will not scale phenomenon, can reduce the time of clear equipment, improve production efficiency, reduce production costs and increase profits

Why do we use Methyl Tin Mercaptide in the PVC industry?

Methyl Tin Mercaptide Heat Stabilizer (called 181 for short) is currently the plastic heat stabilizer with the most excellent performance, which is very effective for the rolling, extrusion, and injection molding of hard PVC. Due to its high safety, it is especially applicable to food packing and hard PVC products (such as transparent fake materials, plate materials and heat contracting membranes). Moreover, it has been widely applied to plastic doors and windows, water pipes, and decorating materials, so as to replace other plastic heat stabilizers that have high toxicity. Therefore it has been widely used in the USA, Europe, and South Asia. Over recent years, 181 has been applied in a large quantity. Because 181's stability is much better than other organic tin stabilizers, the relevant products have better performance. So it has been widely welcomed by many large-scale PVC-processing enterprises, becoming the key adjutant in the processing of hard PVC.Toxicology Oral?LD50?rat (Acute): 1.145 -1.840 mg/kg Advantages[High Heat Stability]

According to the appraisal of the international authoritative organs, 181 Methyl Tin Mercaptide has the highest heat stability and best early-phase coloring among the organic tin heat stabilizers.

The advantage compared with other PVC stabilizers

Small Dosage: At the same effect, 181 Methyl Tin Mercaptide enjoys a small dosage, 15-20% less than butyl tin, and octyl tin, with generally 0.8-1.5 shares.?

Reliable Safety: Authorized by FDA for application as food packing materials with the maximal dosage of 2%.?

Excellent Performance: PVC products using 181 Methyl Tin Mercaptide Heat Stabilizer enjoy high transparency and clean color shade.

Storage and Packaging

Storage Stored in a cool dry place. Packed in 220kg plastic pail or as per?customers' requirements.

Loading information about our tin stabilizers 20'FCL or 40'FCL containers according to our experience:

20'FCL container loading capacity with different packing:

IBC 1.0MT(loads 18MT)

IBC 1.1MT(loads 19.8MT)

IBC 1.2MT(loads 21.6MT)

220KG drum(loads 17.6MT)

225KG drum(loads 18MT)

40FCL container loading capacity with different packing:

25MT?or more

23(IBC): 1.1*20+3*1

About the raw material of Methyl Tin Mercaptide

1. Tin Ingot

1.1 PROPERTIES OF RAW MATERIALS:

ELEMENT SYMBOL: SN

Atomic Volume: (cubic centimeter/mole) : 16.3

Melting Point: 231.89 °C

Boiling Point: 2260 °C

Atomic Mass: 118.7

A protective film of tin dioxide is formed on the surface of tin in the air to stabilize it.

The chemical reaction is accelerated; tin reacts with halogen to generate tin tetrahalide when heated; it can also react with sulfur; tin is stable to water, can be slowly dissolved in dilute acid, and quickly dissolved in concentrated acid; tin can be dissolved in strong alkaline solutions; It will be corroded in acidic solutions of salts such as ferric chloride and zinc chloride.

2. Tin tetrachloride

2.1 Raw material properties:

Colorless fuming liquid, cubic crystal when solid; melting point -33℃, boiling point 114.1℃, density 2.226g/cm3; volatile, fumes due to hydrolysis in humid air; soluble in some non-polar solvents, and it is good for some non-electrolytes (iodine, phosphorus, sulfur, etc.) Solvent. Tin tetrachloride dissolves in water, undergoes hydrolysis and precipitates alpha stannic acid, continues to add distilled water to form pentahydrate tin tetrachloride, which is dissolved in water and ionized to produce [Sn(H2O)]54+ ions. It is soluble in water and emits a lot of heat. It is soluble in alcohol, carbon tetroxide, benzene, toluene, gasoline, etc.

2.2 Storage method:

Store in a cool, dry, well-ventilated warehouse. Keep away from fire and heat source. The relative humidity is kept below 75%. The packaging must be sealed and kept away from moisture. It should be stored separately from easily (combustible) materials, alkalis, alcohols, etc., and avoid mixed storage. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.

3. Methyl chloride

3.1 Raw material properties:

Chloromethane is a colorless and easy to liquefy gas, which is stored in steel cylinders when liquefied under pressure. With ether smell and sweetness. The molecular weight is 50.49, the liquid density is 0.92g/cm3 (20/4°C), the gas density is 1.785g/L, and the boiling temperature is -23.76°C. Slightly soluble in water, soluble in chloroform, ether, ethanol, acetone. Not easy to burn and explode. Non-corrosive. It is decomposed into methanol and hydrochloric acid at high temperature (above 400℃) and under strong light and generates phosgene when heated or exposed to flame. Easily soluble in water, ethanol, chloroform, etc. Dissolve 400ml in 100g water; dissolve 3500ml in 100g ethanol.

3.2 Storage method:

Store in a cool, dry, well-ventilated warehouse. Keep away from fire and heat sources.

The storage temperature should not exceed 30℃. should be kept away from oxidizer, do not store together. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that easily generate sparks. The storage area should be equipped with leakage emergency treatment equipment.

4. Liquid ammonia

4.1 Raw material properties:

Molecular formula: NH3

Relative density (air=1): 0.59

Molecular weight: 17.04

Relative density of liquid ammonia (water = 1): 0.7067 (25℃)

Spontaneous ignition point: 651.11℃

Melting point (℃): -77.7

Explosion limit: 16%～25%

Boiling point (℃): -33.4 1%

PH value of aqueous solution: 11.7

Specific heat kJ (kg·K): ammonia (liquid) 4.609, ammonia (gas) 2.179

Vapor pressure: 882kPa(200℃)

Also known as anhydrous ammonia, it is a colorless liquid. Ammonia is easily soluble in water and forms an alkaline solution of ammonium hydroxide when dissolved in water. The solubility of ammonia in water at 20°C is 34%. Liquid ammonia is widely used in industry, is corrosive, and easy to volatilize, so its chemical accident rate is quite high. Liquid ammonia is a colorless liquid with a strong pungent odor and can easily be vaporized into gas ammonia.

5. Dimethyl sulfide

5.1 Raw material properties

Strong radish smell, betel nut-like smell

Molecular formula: C2H6S CAS: 625-80-9, CAS: 75-18-3

Molecular weight: 62.13

Boiling point: 38℃

Melting point: -98℃

Chinese name: dimethyl sulfide

Property description: Colorless, transparent and volatile liquid, flammable and explosive. Highly toxic. Have

foul smell.

Relative density 0.8450 (20/4℃),

The refractive index is 1.4438, the self-ignition point is 206.1℃, the flash point is -17.8℃, and the distillation range is 36-39℃. Soluble in ethanol and ether, insoluble in water. The flammable range in the air is 2.2%-19.7%.

6. Isooctyl thioglycolate

6.1 Raw material properties:

Molecular formula C10H20O2S, relative molecular weight 204.33, colorless, transparent and easy-flowing oily liquid at room temperature. The pure product has a special odor, is insoluble in water, and can be miscible with organic solvents such as ethanol and ether. It is weakly acidic and can be mixed with sodium hydroxide. And other alkaline substances generate corresponding metal salts.

We are a professional manufacturer specialized in Methyl Tin Mercaptide(PVC heat stabilizers) with 18 experience, maybe we could do sth for you and it must be a good product portfolio for your company.?

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Manufacturer:

Taian City Blue Sky Auxiliaries Co., Ltd.

Website: www.blueskyauxiliaries.com

Email: [email protected]

WhatsApp: +8618017218168

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