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[China]
Address: 81 Fanhua Road, Songjiang,shanghai (201613) Transportation Bus 7, the Shanghai-green may direct. Geographical position Songjiang Industrial Zone headquarters in the bustling Road 81, Shanghai-Hangzhou high-speed, the Shanghai-old highway, the North Tower, Wing Lok Road.
Phone: 21-51095728, 51095718
shanghai Huaming Gona Rare Earth New Materials Co.Ltd |
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Silicone Rubber Heat Stabilizers [Mechanism] Silicone rubber in a confined high-temperature oxygen-free
conditions mainly react in the main chain rearrangement thermal
degradation, that is, the depolymerization reaction took place, so
that the products softened (or soften), resulting in the loss of
mechanical strength, loss of use value. The high temperature in the
aerobic conditions, mainly polymer-based side of the oxidation, the
formation of alkyl radicals, and free radical reactions result in
coupling the seal of cross-linking density, so that the products
gradually harden, and even the occurrence of cracks (known as the
Sclerosis). In the silicone rubber by adding cerium oxide, prevents
oxidation of side-chain polysiloxane cross-linked and the main
chain of degradation. To a certain temperature range to prevent the
silicone rubber as a result of free radical oxidation reactions
generated, but also in the air under the O2 regeneration; absorbed through the silicone rubber to some of the
catalytic reaction of the degradation of micro-acid or alkaline
substances In order to play a silicone rubber on the role of
heat-stable. At the same time, ceria special electronic structure
(f Electron shell is not filled with) so that it easier to form
complex, the formation of complex molecules through the rubber
block segment of the campaign to curb the rubber in the solvent of
swelling, resulting in improved rubber Of oil. [Product properties]
[Technology Parameters]
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