IRGANOX 1520 PDF
Get instant access to Irganox® L technical datasheet. It is a multifunctional liquid phenolic antioxidant for processing and long-term thermal stabilization. Multifunctional phenolic antioxidant for processing and long-term thermal stabilization of elastomers, plastics and related products. NameMethyl-4,6-bis(octylsulfanylmethyl)phenol,CASProperties: Molecular Fomula:C25H44OS2,Molar Mass,Densityg/cm 3.
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The method of claim 7 wherein the aliphatic conjugated diene is a butadiene monomer. Mass polymerization, also known as bulk polymerization refers to the polymerization of a monomer in the absence of any medium other than the monomer and a catalyst or polymerization initiator.
Antioxidant Irganox , CAS# Supplier | China Baoxu
The embodiments described herein are exemplary only, and are not intended to be limiting. Thus, a need exists for styrenic polymer compositions such as HIPS having an improved color and methods of making same.
In an embodiment, the polymerization reaction may be carried out using a continuous production process in a polymerization apparatus comprising a irganpx reactor or a plurality of reactors.
The method of claim 1 wherein the polystyrene is prepared via a mass polymerization process. Such HIPS contain an elastomeric phase that is embedded in the polystyrene matrix resulting in the composition having an increased impact resistance.
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In other embodiments, the CIA may be introduced to the polymerization reactor at some point downstream of the first polymerization reactor. The chromacity dimensions a and b give understandable designations of color as follows:. irganlx
Irganox® 1520 L
In addition to the additives that the elastomers contain, the following compounds are used: In such embodiments, the CIA may function to inhibit CFC 1250 and may be present prior to the addition of any additional metallic stearates. Additional details regarding solution or mass polymerization processes iragnox residence times have been previously described herein.
In an embodiment, a process for the production of a styrenic polymer composition comprises contacting a reaction mixture comprising styrene, an elastomer having at least one antioxidant, and a CIA prior to contacting the reaction mixture with an oxidizing agent.
However, UL assumes no responsibility or liability for the accuracy of the information contained on this website and strongly encourages that upon final product or material selection information is validated with the manufacturer. Many variations and modifications of the embodiments disclosed herein are possible and are within the scope of the disclosure. For example, antioxidants such as catechols or phenols which are added to the HIPS production process primarily to stabilize styrene monomer or are present in polybutadiene riganox, may be oxidized to quinone-type compounds or simply color bodies resulting in a discoloration or yellowing of the polymer composition.
Initiators, sometimes referred to as accelerators, are compounds that function as the source of free radicals to enable the polymerization of styrene. The unreacted materials may be returned upstream using a process known as devolatilization wherein the unreacted styrene monomer is carried out of the reaction vessel at high reaction temperatures 15200 pressures in a recycle stream.
In such embodiments, the final antioxidant concentration in the HIPS originating from the elastomer may be in the range of from 80 ppm to ppm, alternatively from 80 organox to ppm, alternatively from 80 ppm to ppm. In an embodiment, the styrenic polymer composition may comprise compounds such as metallic stearates and initiators. We intend to purchase this product, would you please send me the quotation and minimum order quantity?
To Zibo Muhui Trading Co. The present disclosure relates generally to styrenic polymer compositions and more specifically to polystyrene having improved color and methods of making same. Improved methods of making styrenic polymeric compositions and methods of using same. Many commercial formulations of such elastomers may include at least one antioxidant as a stabilizer.
Thank you for your enquiry and you will be contacted soon. The effect of changing the peroxide initiator package and irgajox on the color of the HIPS resin produced was investigated. Alternatively, a styrenic polymer composition comprises a polymer of styrene, an elastomer and a Irvanox.
Accordingly, the scope of protection is not limited by the description set out above but is only limited by the claims which follow, that scope including all equivalents of the subject matter of the claims.
In an alternative embodiment, the CIA may be introduced to the polymerization process at some time subsequent to the dissolution of the elastomer. When the prepolymer reaches the desired conversion, it may be passed through a heating device into a second reactor for further irgwnox. The method of claim 1 wherein the antioxidant irganod present in an amount of from ppm to 10, ppm. In an embodiment, the irgsnox polymer composition may comprise a metallic stearate such as zinc stearate.
The color formation in the polymer composition may be assessed using any technique known to one of ordinary skill in the art for the assessment of color in a polymeric composition. Resins were prepared using ppm Zinc Stearate ZnStKBR S and a two initiator package and compared to resins prepared using the D elastomer and a one initiator package.