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 presence of the CIA e. In an embodiment, the CIA may also be present in a reactor receiving a recycle stream comprising an elevated level of antioxidants, such as described previously herein. The method of claim 7 wherein the aliphatic conjugated diene is a butadiene monomer. In an embodiment, a styrenic polymer composition may contain a neutralizing agent such as a metallic stearate in amounts of from 50 ppm to ppm, alternatively from ppm to ppm, alternatively from ppm to ppm, alternatively from 50 ppm to ppm, with all ppm values stated herein by weight unless otherwise indicated.
For example, the polymerization reaction may be carried out in a reactor system employing a first and second polymerization reactors that are either continuously stirred tank reactors CSTR or plug-flow reactors. In an embodiment, the styrenic polymer composition comprises an initiator or the byproducts of an initiator reaction.
Metallic stearate additives are neutralizing agents which may aid in the processing of polymer resins by neutralizing acidic sites as well as aiding mold release. 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 and pressures in a recycle stream. Blends or copolymers of the diene monomers may also be used. 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.
The method of claim 1 wherein the oxidizing agent is present in an amount of from 50 ppm to ppm.
Method of adding water insoluble organic chemicals to styrene-butadiene rubber latex dispersions and resulting styrene-butadiene rubber latex dispersions. A process for the preparation of rubber-reinforced monovinylidene aromatic polymers. Such antioxidants may react irganoxx metals present in the polymeric reaction mixture such as iron or zinc to produce color-forming compounds CFCs.
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. The method of claim 4 wherein the calcium stearoyl lactate is present in an amount of from ppm to ppm. For example, the styrenic polymer composition can be prepared using an upflow reactor. These results are graphically represented in FIGS. The method of claim 1 wherein the reaction mixture has a residence time of 0.
The polymerized product effluent from the second reactor may be further processed as is known to one of ordinary skill in the art and described in detail in the literature.
Synthesis of Irganox 《Fine Chemicals》年04期
For example and without limitation, CSL or other CIA may be included in a reaction mixture or component comprising an antioxidant prior to the inclusion of an oxidizing agent such as a metallic stearate. CSL and optionally additional components as needed to impart the desired physical properties.
The CIA may function to inhibit the oxidation of other components of the polymer composition such as for example and without limitation the antioxidants.
Name Company Telephone Address Finish. Many commercial formulations of such elastomers may include at least one antioxidant as a stabilizer. Use of broader terms such as comprises, includes, having, etc. We will find the most reliable suppliers for you according to your description. The method of claim 1 wherein the antioxidant comprises a phenol, a catechol, ris-nonylphenylphosphite TNPP2,6 ditertiarybutylmethyl phenol, Octadecyl 3,5-Di- tert -butylhydroxyhydrocinnamate, 4-bis[ octylthio methyl]-o-cresol, or combinations thereof.
Please send your question! In an embodiment the reaction process begins with a reaction mixture comprising styrene, a CIA, an elastomer having at least one antioxidant, and optionally additional components such as those described herein or as known to one of ordinary skill in the art.
It effectively protects the substrate against thermooxidation during processing and long term heat aging. In an embodiment, any initiator capable of free radical formation that facilitates the polymerization of styrene may be employed. Said reaction mixture may be introduced to a polymerization reactor system, which will be described in detail later herein to allow for the formation of a styrenic polymer composition.
irgabox In an embodiment, the CIA is present in the reaction mixture prior to the addition of any compound that may serve as an oxidizing agent. The polymerization process can be either idganox or continuous. Be contacted easily by perfecting the information. 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 ppm to ppm, alternatively from 80 ppm to ppm.
In some embodiments, the antioxidant is introduced indirectly to the reaction mixture as a component in the elastomer formulation. In yet another embodiment, the polymerization reaction may be carried out in a plurality of reactors with each reactor having an optimum temperature range.
In such embodiments, the CIA may be introduced to the composition prior irgsnox the addition of an antioxidant to inhibit or prevent CFC formation. In an embodiment, the styrenic polymer composition may comprise compounds such as metallic stearates and initiators.