Furex Fx-181 CAS 57583-35-4 Tin 19% Methyl Tin Mercaptide Manufacturer

Product Description

Product Description

Product Name: Methyl Tin Mercaptide 

Type: FX-181

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

Introduction of Methyl Tin Mercaptide FX-181

Methyl tin mercaptide, a type of organotin stabilizer that also includes butyl tin and octyl tin variants, is a transparent and viscous liquid with excellent compatibility in PVC formulations. It acts as a key stabilizer during the thermal processing of PVC, providing exceptional initial and long-term thermal stability, high product clarity, and superior weatherability compared to other metal-based heat stabilizers. Furthermore, it demonstrates strong compatibility with a range of additives and weakly polar oils, including C8–C12 fatty alcohols, fatty acids, phosphite esters, and mineral oils.

This compound is non-flammable and remains in a viscous liquid state even at temperatures as low as -20°C, owing to its low freezing point. Thanks to its straightforward manufacturing process and cost efficiency, methyl tin mercaptide is regarded as one of the most promising organotin stabilizers for various PVC processing methods such as extrusion, calendering, blow molding, and injection molding.

FX-181 is an advanced formulation within this class, specifically designed for clear PVC products. It delivers exceptional initial color retention, dynamic thermal stability, clarity, and weatherability, while requiring low dosage levels. FX-181 also offers good processability and a competitive price point.

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Production of Methyl Tin Mercaptide

The production of Methyl Tin Mercaptide mainly involves two steps:

1. Intermediate Preparation: Tin reacts with methyl chloride to form a methyl tin chloride mixture.
2. Esterification Reaction: This mixture reacts with iso-octyl thioglycolate in an alkaline solution. The by-product is neutralized. The final product is obtained through post-treatment steps like water washing and dehydration.

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Main Application Overview

It serves as an outstanding stabilizer for clear rigid PVC and vinyl copolymer blow – molding formulations meant for food contact. It offers remarkable clarity and good initial color stability. It is a highly effective stabilizer for the injection molding of pipe fittings and other top – quality parts used in potable water applications. It is excellent for calendered and extruded vinyl sheets in food – contact scenarios. It is suitable for food packaging applications as specified by the US FDA, BedGgstV (Germany), and Commission Regulation (EU) No 10/2011 for plastics intended to contact food. It enables efficient utilization of regrind. 

Applications of Methyl Tin Mercaptide

PVC Films
– Heat – shrinkable packaging films for secure and aesthetic product wrapping.

– Printing films, offering high – quality printability for various visual displays.

– Calendering films, with smooth and consistent surfaces.

– Kindling films, serving specific ignition – related functions.

PVC Sheets

– Transparent soft and hard films, used in diverse applications requiring clarity and different degrees of flexibility.

– Christmas films, adding festive elements with their unique designs.

– Advertising films, effectively conveying promotional messages.

– Compound films, combining multiple properties for enhanced performance.

PVC Particles
– Granular materials, which are the basic form for further processing.

– Housings for electronic communication equipment, providing protection and a sleek appearance.

PVC Building Materials
– Water pipes and fittings, ensuring reliable water conveyance.

– Chemical pipes, resistant to chemical corrosion.

– Various building materials and profiles, contributing to the construction industry's needs.

Other Applications
– PVC medical appliances such as infusion sets, meeting strict medical safety standards.

– Food packaging materials, ensuring food safety and preservation.

– Household appliances, enhancing the durability and functionality of daily – used products. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Key Properties of FX-181

1. Outstanding Thermal Stability
Currently, no other type of PVC stabilizer can match the thermal stability performance of methyl tin mercaptide. It offers excellent high-temperature color retention and long-term dynamic stability, making it the preferred stabilizer for rigid PVC applications. It is suitable for all PVC homopolymers—including emulsion, suspension, and bulk PVC—as well as graft polymers and copolymers.
2. Superior Transparency
Organotin stabilizers are widely recognized for their transparency. Methyl tin mercaptide, in particular, helps achieve crystal-clear end products without whitening. It is especially suitable for manufacturing bottles, containers, bellows, hard packaging, hoses, profiles, films, and other transparent PVC items.
3. Non-Toxic and Environmentally Friendly
Methyl tin mercaptide is a non-toxic, environmentally friendly stabilizer with very low migration rates in PVC. It has been approved by regulatory agencies including the German Federal Health Agency (BfArM), the US FDA, the British Plastics Federation (BPF), and the Japan Hygienic PVC Association (JHPA). As a result, it is permitted for use in food packaging, medical products, and drinking water pipes in the US, Europe, Japan, and other regions.
4. Excellent Compatibility
Methyl tin mercaptide exhibits strong compatibility with PVC. It disperses easily during compounding, and finished products show no exudation or precipitation over time. This helps maintain surface quality and electrical properties. Its compatibility with PVC is superior to that of butyl- or octyl-based tin stabilizers.
5. Improved Processing Fluidity
Methyl tin mercaptide optimizes the melt flow behavior of PVC, providing better fluidity during processing. It has a milder plasticizing effect compared to mixed-metal or lead-based stabilizers, making it an ideal heat stabilizer for rigid PVC formulations.
6. Anti-Scaling Properties
The use of methyl tin mercaptide helps prevent scaling in processing equipment. This reduces cleaning frequency, improves production efficiency, lowers operating costs, and increases overall profitability.

Why is Methyl Tin Mercaptide Widedly Used in the PVC Industry

I. Introduction

Methyl Tin Mercaptide Heat Stabilizer (abbreviated as 181) stands out as the plastic heat stabilizer with the most outstanding performance in the current PVC industry. It plays a crucial and versatile role in various PVC processing methods and product applications.

 

II. Reasons for Its Use

A. Wide – ranging Applicability in PVC Processing

1. Suitability for Different Molding Processes

   – 181 is highly effective for the rolling, extrusion, and injection molding of hard PVC. These are common and important processes in the production of various PVC products. For example, in the extrusion of PVC pipes, the use of 181 ensures smooth processing and high – quality output.

2. Diverse Product Applications

   – Due to its high safety, it is particularly suitable for food packing and hard PVC products such as transparent fake materials, plate materials, and heat – contracting membranes. In the food packaging industry, safety is of utmost importance, and 181 meets the strict requirements.

   – It has also been widely applied to plastic doors and windows, water pipes, and decorating materials. By using 181, manufacturers can replace other plastic heat stabilizers that have high toxicity, which is in line with the trend of environmental protection and safety in the industry.

 

B. Market Popularity and Usage Scale

1. Regional Acceptance

   – 181 has been widely used in the USA, Europe, and South Asia. This wide geographical application indicates its recognition and trust in different markets around the world.

2. Increasing Demand in Recent Years

   – Over recent years, 181 has been applied in large quantities. This growth in usage is mainly because 181's stability is much better than other organic tin stabilizers. As a result, the relevant PVC products have better performance, which has led to its wide welcome by many large – scale PVC – processing enterprises. It has become an essential additive in the processing of hard PVC.

III. Toxicology Information
The oral LD50 (Acute) for rats is in the range of 1.145 – 1.840 mg/kg. This information provides a basic understanding of its toxicity level, which is an important consideration in its application, especially in industries related to food and consumer products.
 
IV. Advantages: High Heat Stability
According to the appraisal of international authoritative organizations, 181 Methyl Tin Mercaptide has the highest heat stability and the best early – phase coloring among organic tin heat stabilizers. High heat stability is crucial in PVC processing as it ensures that the PVC products can maintain their quality and performance during high – temperature processing and long – term use. The good early – phase coloring property also contributes to the aesthetic and quality of the final PVC products.

Packaging 

20'FCL: With IBC 1.0MT(loads 18MT) or 1.1MT(loads 19.8MT) or 1.2MT(loads 21.6MT), usually the 20FCL can be with small 220KG drum(loads 17.6MT) and 225KG drum(loads 18MT).

40'FCL: 25MT   (23IBC: 1.1MT*20+1MT*3) or more

Delivery

Factory Overview

Why Choose us?

1. With over a decade of experience, we are a professional chemical company supplying a wide range of high-quality products at competitive prices.
2. We work with experienced freight partners to ensure smooth customs clearance and cost-effective shipping.
3. Our team of professional technicians is always ready to provide you with expert support.
4. We guarantee fast delivery once payment is confirmed.
5. OEM and ODM services are available to meet your specific requirements.
6. We maintain strong collaborative relationships with renowned universities worldwide.
7. Our customer service team is available 24/7 to assist you with pre-sales and after-sales support.
8. Customer satisfaction is our ultimate priority.

FAQ

Q1: Can I request a sample before placing an order?
Re: Yes, samples are available. For standard products, samples are free of charge; you only need to cover the freight cost. For high-value products, a partial product fee may apply in addition to the freight. Once we have established a cooperative relationship or you become a VIP customer, free samples will be provided upon request.

Q2: What payment methods does your company accept?
Re: We accept T/T, L/C, and PayPal. You may choose the option most convenient for you.

Q3: How and when will I receive my goods after payment?
Re: For small orders, items are shipped via international express carriers (such as DHL, FedEx, or TNT) or by air. Delivery typically takes 5–7 days. For larger orders, sea freight is a cost-effective option. Shipping time by sea may range from several days to several weeks, depending on the destination port.

Q4: Is it possible to use my own branded labels or packaging?
Re: Yes. Upon request, we can use your specified labels or packaging according to your requirements.

Q5: How do you ensure the products provided are qualified?
Re: We operate on a foundation of honesty and responsibility. All products undergo strict quality testing, and a Certificate of Analysis (COA) will be provided before shipment to guarantee quality.