描述

Di-n-octyltin Oxide / Dioctyltin Oxide CAS 870-08-6

Dioctyltin Oxide for Synthesis – CAS 870-08-6 is a versatile compound widely used in various applications. Also known as Dioctyloxostannane, this compound plays a crucial role in the synthesis process and holds great importance in the research field. With its high purity and unique composition, this product guarantees reliable and accurate results, making it perfectly suited for synthesis processes. Dioctyltin Oxide for Synthesis finds applications in numerous technical fields, including chemical research, pharmaceutical industry, and material science.

This product is mainly used in the production of PVC heat stabilizers, paint enhancers, can also be used in part of the production of antioxidants catalysts.

As a catalyst for the synthesis of polyurethane, it can form a stable dispersion system in water-based coatings.

特点

Synonym: Dioctyltin Oxide, Dioctyloxostannane

CAS Number: 870-08-6

High purity: With its exceptional purity, Dioctyltin Oxide for Synthesis ensures consistent and precise outcomes in the synthesis process.

Perfectly suited for synthesis: The unique composition and properties of this compound make it specifically designed for use in synthesis processes. It allows researchers to achieve their desired results efficiently.

Wide range of technical applications: Dioctyltin Oxide for Synthesis finds applications in various technical fields, such as chemical research, pharmaceutical industry, and material science. Its versatility makes it suitable for diverse uses.

MSDS available: To ensure user safety, the material safety data sheet (MSDS) for Dioctyltin Oxide for Synthesis is provided. It contains essential safety information and guidelines.

Supported by peer-reviewed papers and technical documents: This compound is supported by peer-reviewed papers and technical documents, providing users with additional information, experimental protocols, and references to enhance their research.

Similar products available: In case Dioctyltin Oxide for Synthesis does not meet specific requirements, similar products with different compositions and properties are also available to cater to individual needs.

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Dioctyltin Oxide in PVC heat stabilizers

Evaluation of heat discolouration of various heat stabilizers

Ideal heat stabilizers should have the functions of absorbing HCL, eliminating active sites, adding to conjugated polyene chains, destroying carbon positive ion salts, and preventing auto-oxidation without generating products that have a catalytic effect on the degradation of PVC. The actual heat stabiliser has different functions and shows different heat stabilisation properties, which can be roughly divided into four categories: initial type, long-term type, intermediate type and all-purpose type.

1) Cadmium, zinc soap is a typical initial-type heat stabilizers, can quickly absorb HCL, and in the Cd, Zn catalyzed by carboxylic acid root effectively replace the unstable chlorine atoms on the PVC chain, thus effectively inhibiting the initial degradation and colouring, but because of its consumption of fast and conversion products CdC12, ZnC12, and is a highly effective catalyst for PVC off HCL, and thus will trigger the vicious degradation of PVC to make the material suddenly Therefore, the long-term thermal stability is poor.
2) Barium, calcium soap is a typical long-term heat stabilizer, only absorb HCL function, so it can not effectively inhibit PVC colouring, but because the conversion product BaC12, CaC12 does not have catalytic activity, will not cause PVC suddenly turn black, long-term thermal stability is better.
3) Fatty acid organotin belongs to the intermediate type, not only can absorb HCL, but also can effectively replace the unstable chlorine atoms on the PVC chain with carboxylic acid roots, and the conversion product does not have catalytic activity.
4) Thiol organotin has all-round characteristics, can stabilise PVC by various mechanisms at the same time, and the conversion product is not catalytically active, so it has both excellent initial and long-term heat stabilisation effects.

The ideal PVC structure is the first-tail structure -CH2-CHCl-CH2-CHCl-, which is quite stable. However, the synthesis of PVC has so far not been possible in the same way as the synthesis of cis-butadiene rubber, where cis-butadiene is subjected to directional random polymerisation in the presence of a zwitterionic catalyst.

Polymerisation of vinyl chloride is a free radical random polymerisation, it has a stable first – tail structure, there are first – first structure – CH2 – CHCl – CHCl – CH -, tail – tail structure – CHCl – CH2 – CH2 – CHCl -; there is a coupling disproportionation to generate vinyl junction CH2 =CH2-CHCl-CHCl-CH2 structure and allyl chloride-CH2-CH=CH-CHCl-CH2 and so on.
In PVC synthesis to generate allyl chloride, tertiary carbon chlorine and double bond is its molecular chain structure in the unstable factors, unstable order: PVC molecular chain within the allyl chloride > tertiary carbon chlorine > end group allyl chlorine > secundary chlorine.PVC processing easy to degrade precisely because of the structure of the PVC molecular chain of the unstable factors, such as not to stabilise the modification of the decomposition temperature of 130 ° C or so, but to be PVC resin processing into useful products, the moulding temperature should be above 190 ℃. Therefore, it is necessary to add heat stabilizers to stabilise and improve its structure.