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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Process for the production of elastomeric diene polymers with improved properties. In an embodiment, the styrenic polymer composition may comprise a metallic stearate such as zinc stearate. The method of claim 1 wherein igranox polystyrene is prepared via a mass polymerization process.
In an embodiment, a styrenic polymer composition may contain an antioxidant in amounts of from ppm to 10, ppm, alternatively from ppm irgqnox 7, ppm, alternatively from ppm to ppm, alternatively from ppm to ppm, alternatively from ppm to ppm, alternatively irganoox ppm to ppm, alternatively from ppm to ppm. For example IRGANOX may be present in an elastomer formulation in an amount of from ppm to ppm, alternatively from ppm to ppm by weight of the elastomer, irgaanox from ppm to ppm, alternatively from ppm to ppm, alternatively ppm by weight of the elastomer.
In an embodiment, the antioxidant is present with an elastomer. Can you please send me the updated price and moq? 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.
Styrene is widely commercially available and as used herein the term styrene includes a variety of substituted styrenes e. The method of claim 4 wherein the calcium stearoyl lactate is present in an amount of from ppm to ppm. 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. Name Company Telephone Address Finish. The resultant styrenic polymer composition may be a polystyrene homopolymer such as general-purpose polystyrene GPPS or a polystyrene copolymer such as high irgsnox polystyrene HIPS having an improved color when compared to an otherwise identical polystyrene lacking a CIA.
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In one embodiment, both a metallic stearate e. The results demonstrate a reduction in the yellow index values and reduced b values for HIPS comprising CSL regardless of the elastomer or initiator package used. The method of claim 1 wherein the oxidizing agent is a metallic stearate, an initiator, air or combinations thereof.
For example, the styrenic polymer composition can be prepared using an upflow reactor.
Are you a distributor who is interested in being listed here? 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. Initiators, sometimes referred to as accelerators, are compounds that function as the source of free radicals to enable the polymerization of styrene. Visually, yellowness is associated with scorching, soiling and general product degradation by light, chemical exposure, and processing.
The HIPS that was produced contained 8. The results also demonstrate that CSL is effective in reducing color formation even in the iranox of initiators having a higher degree of stability at elevated temperatures.
Disclosed herein is irganlx method of improving the color of a high impact polystyrene comprising preparing a reaction mixture comprising styrene, elastomer and at least one antioxidant, and introducing to the reaction mixture a color improving additive prior to the addition of any oxidizing agents to the reaction mixture. Solution polymerization refers to a polymerization process in which the irganpx and polymerization initiators are dissolved in a non-monomeric liquid solvent at the beginning of the polymerization reaction.
A method irgajox improving the color of a high impact polystyrene comprising preparing a reaction mixture comprising styrene, elastomer and at least one antioxidant, and introducing to the reaction mixture a color improving additive prior to the addition of any oxidizing agents to the reaction mixture. The effectiveness of this product used in a wide range of elastomers is exceptional along with extensive food contact approvals.
A process for the preparation of rubber-reinforced monovinylidene aromatic polymers.
Be contacted easily by perfecting the information. Said CIA may be the salt of an organic acid, alternatively an alkali salt of an organic acid, alternatively an alkali salt of lactic acid, alternatively sodium stearoyl lactate, alternatively calcium stearoyl lactate CSL or combinations thereof.
The polymerized product effluent from irgaox second reactor 15200 be further processed as is known to one of ordinary skill in the art and described in detail in the literature. The first polymerization reactor may be referred to herein as the prepolymerization reactor.
Without limitation examples of oxidizing agents which are commonly found in the reaction processes for the production of styrenic polymer compositions include metallic stearates, initiators, air, or combinations thereof.
The disclosures of all patents, patent applications, and publications cited herein are hereby incorporated by reference, to the extent that they provide exemplary, procedural or other details supplementary to those set forth herein. The method of claim 1 wherein the polystyrene is prepared via a solution polymerization process. This feature is Quick question function, select the corresponding question types, automatically enter the corresponding problem, remove your trouble of irgwnox.
In such embodiments the CIA may be present in the irgankx at ambient temperature for greater than 48 hours prior to use. Alternatively, a styrenic polymer composition comprises a polymer of styrene, an elastomer and a CIA. The discussion of a reference herein is not an admission that it is prior art to the present disclosure, especially any reference that may have a publication date after the priority date of this application.
In an embodiment, the styrenic polymer composition is HIPS comprising a conjugated diene monomer as the elastomer. Thus in the Hunter scale, L measures lightness and varies from for perfect white to zero for black, approximately as the eye would evaluate it. Without intending to be limited by theory, the addition of the CIA as described herein may prevent the formation of the undesirable color adduct via inhibiting the reaction as shown in Equation 1.
In addition to the additives that the elastomers contain, the following compounds are used: The reaction mixtures may be subjected to solution or mass polymerization processes such that the residence time of the mixture components may range from 0. US USB2 en In an embodiment, itganox CIA may be calcium stearoyl lactate.
The embodiments having been generally described, the following examples are given as particular embodiments of the disclosure and to demonstrate the practice and advantages thereof. Please quote me your price and order payment terms and delivery time. May I be an agency of your products,and what’s yourterms?
In some embodiments, the styrenic polymer composition may comprise an elastomer, and irrganox resultant polymeric composition may be a HIPS. Where numerical ranges or limitations are expressly stated, such express ranges or limitations irgqnox be understood to irgxnox iterative ranges or limitations of like magnitude falling within the expressly stated ranges or limitations e.
The method of claim 1 wherein a color improving additive is an alkali salt of an organic acid, an alkali salt of lactic acid, sodium stearoyl lactate, calcium stearoyl lactate or combinations thereof.