The production process of methyl tin is simple, low cost, and excellent performance. It is an organotin variety with development potential among organotins. It is used in PVC extrusion, calendering, and blow molding And injection molding of various products.
| Chinese name | Methyltin Mercaptide | foreign name | Methyl Tin Mercaptide |
| Molecular formula | C31H60O6S3Sn and C22H44O4S2 Sn | CAS NO | 57583-35-4 |
Methyltin mercaptide is one of the three major organotin varieties. It is a transparent, clear and viscous liquid with good compatibility with PVC and C8-C12 fat Compatible with weak polar oils such as alcohols, C8-C12 fatty acids, fatty alcohol phosphite, grease, etc., non-flammable, low freezing point, and is still a viscous liquid even at -20°C.
Methyltin mercaptide heat stabilizer is a variety with good stability. Under the action of an amine phase transfer catalyst, tin methylation reaction is carried out with methyl chloride to generate a mixture of methyl tin chloride. After disproportionation reaction, the content of trimethyl tin chloride is controlled to be less than 0.1%, and then reacted with isooctyl thioglycolate to remove This product was prepared after chlorine. Organotin industrial varieties are mainly divided into methyl tin, butyl tin and octyl tin. Because the production process of methyl tin is simple, low cost and excellent performance, it is an organotin variety with development potential among organotins. It is used in various products of PVC extrusion, calendering, blow molding and injection molding. It has excellent initial coloring, transparency and thermal stability. Key additives for profiles and other products.
The industrial product is mainly a mixture of dimethyl tin mercaptide and monomethyl tin mercaptide, and the general product is monomethyl tin mercaptide and dimethyl tin mercaptide The weight ratio of methyl tin is 20:80, monomethyl tin mercaptan has excellent early stability, and dimethyl tin mercaptan has better late stability. Methyltin mercaptide has been approved by the US FDA (21 CFR 178.2010) and certified by the German BGA (ⅡA, 4C). It can be used in food packaging materials and water supply pipes, etc., and is safe and reliable. Because of its excellent performance, it can be used in the processing of food-grade hard transparent products with high processing requirements.
Performance characteristics of mercaptan methyl tin PVC stabilizer
1: Excellent heat stabilizer performance. In terms of heat stability, no other type of PVC stabilizer can surpass it. It has excellent high temperature Color stabilizer and long-term dynamic stability. Therefore, it is the first PVC stabilizer for rigid PVC, suitable for all PVC homopolymers, such as emulsion, suspension and bulk PVC, as well as polyvinyl chloride copolymers, graft polymers and copolymers.
2: Excellent transparency Organotin PVC stabilizer has excellent transparency. Crystalline products can be obtained without whitening. Because of this, SS-218A/TM-181-FS can be used in bottles, containers, bellows, all types of rigid packaging containers, hoses, profiles, films, etc.
3: The product is non-toxic, methyl tin mercaptide is a non-toxic green stabilizer, methyl tin mercaptide migrates very little in PVC, methyl tin The PVC stabilizer has been approved by the German Federal Health Agency, the US Food and Drug Administration, the British BPF and the Japanese JHPA, so in the United States, Europe, Japan and other countries, methyl tin mercaptide is approved to be used in PVC products for food and pharmaceutical packaging and in the upper water pipe.
4: Good compatibility Mercaptan methyl tin PVC stabilizer has good compatibility with PVC and is easy to disperse in PVC complexes. It will not precipitate out even if the product is used for a long time. Therefore, the surface properties and electrical properties of the product will not be affected. The compatibility of methyl tin and PVC is better than that of butyl tin and octyl tin.
5: Better fluidity Methyl tin mercaptide can improve the melting effect of PVC, so that PVC has good fluidity during processing, and it can enhance the resin Compared with mixed metal or lead salt stabilizers, it produces lower melt viscosity, so methyl tin is a good heat stabilizer for mixtures of rigid PVC.
6: Strong fouling resistance: No fouling will occur when using methyl tin mercaptide, which can reduce the number of clearing equipment, improve production efficiency, and reduce production Cost, expand profit
Application Field
PVC film (heat shrinkable packaging film, printing film, calendering film, twisted film, etc.)
PVC sheet (transparent soft and hard sheet, Christmas sheet, commercial sheet, composite sheet, etc.)
PVC particles (granules, electronic communication equipment shells, etc.)
PVC building materials (water supply pipes and fittings, chemical pipes, building materials, profiled materials, etc.)
PVC medical devices (infusion sets, etc.), food packaging materials, daily living appliances and other products
