31570-04-4 Usage
Characterization
Antioxidant 168? is a hydrolytically stable phosphite processing stabilizer. As a secondary antioxidant,Antioxidant 168 reacts during processing with hydroperoxides formed by autoxidation of polymers preventing process induced degradation and extending the performance of primary antioxidants.
Reactions
Precursor to a palladacyclic catalyst for Suzuki, Stille and Heck processes.
Ligand for Pd-catalyzed [3+2] intramolecular cycloaddition of alk-5-enylidenecyclopropanes.
Ligand for Pt-catalyzed intramolecular silaboration of alkenes.
Ligand for Ni-catalyzed aminocarbonylation of aryl halides.
Ligand for the Au-catalyzed [4+2] intramolecular cycloaddition of allene-dienes.
Rhodium-Catalyzed Allylic Substitution with an Acyl Anion Equivalent.
Applications
The application range of Antioxidant 168 -synergistically combined with other Ciba anti-oxidants - comprises polyolefins and olefin-copolymers such as polyethylene (e.g. HDPE, LLDPE), polypropylene, polybutene and ethylene-vinylacetate copolymers as well as polycarbonates and polyamides. The blends can also be used in polyesters, styrene homo- and copolymers, adhesives and natural and synthetic tackifier resins, elastomers such as BR, SEBS, SBS, and other organic substrates. Antioxidant 168? blends can be used in combination with light stabilizers of the TINUVIN and CHIMASSORB range.
Features/benefits
Antioxidant 168? is an organophosphite of low volatility and is particularly resistant to hydrolysis. It
protects polymers which are prone to oxidation, during the processing steps (compounding/
pelletizing, fabrication and recycling) from molecular weight change (e.g. chain scission/crosslinking)
and prevents discoloration.
Antioxidant 168 performs best when combined with other Ciba antioxidants. Blends of Antioxidant 168
with antioxidants of the IRGANOX range (IRGANOX B-blends) and with Hydroxylamine FS042 are
particularly effective. The IRGANOX range antioxidants additionally provide storage stability and give
the polymer long term protection against thermo-oxidative degradation.
Antioxidant 168 comprised in phenol free systems with other appropriate Ciba stabilizers addresses
specific stabilization requirements.
Guidelines for use
Typically 500 - 2000 ppm of Antioxidant 168 combined with appropriate levels of other additives are used for the processing stabilization of polymers. The optimum level is application specific. Extensive performance data of Antioxidant 168 combinations in various organic polymers and applications are available upon request.
Safety
Different sources of media describe the Safety of 31570-04-4 differently. You can refer to the following data:
1. In accordance with good industrial practice, handle with care and prevent contamination of the
environment. Avoid dust formation and ignition sources.
For more detailed information please refer to the material safety data sheet.
2. Antioxidant 168 is approved for indirect food contact applications.
Uses
Different sources of media describe the Uses of 31570-04-4 differently. You can refer to the following data:
1. Tris(2,4-tert-butylphenyl) Phosphite is an intermediate in the synthesis of Tris(2,4-di-tert-butylphenyl)phosphate (T884500), a processing stabilizer for polymers.
2. This product is an excellent Antioxidant wnameely applied to polyethylene, polypropylene, polyoxymethylene, ABS resin, PS resin, PVC, engineering plastics, binding agent, rubber, petroleum etc. for product polymerization.
Application
Antioxidant 168 is a kind of phosphite ester antioxidant as processing stabilizer, used for polypropylene, polyethylene, and adhesives. The amount to be used may be 0.1%~1.0% depending on the substrate, processing conditions, and requirements of the end application. Blends with hindered phenols are particularly effective.In addition, they use combination with light stabilizers when need.
General Description
Tris(2,4-di-tert-butylphenyl) phosphite is a triaryl based phosphite that can be used in catalysis and metallation. Its characteristic to undergo metallation reaction and provide a cost effective synthetic processes allows it to be useful in biaryl coupling reactions.
Flammability and Explosibility
Notclassified
Properties and Applications
TEST ITEMS
SPECIFICATION
APPEARANCE
WHITE INCOMPACT POWDER
CONTENT
99.0% min
MELTING RANGE
183-187 °C
VOLATILE
0.3% max
SOLUBILITY 2g/20ml TOLUENE
CLEAR
FREE 2,4-DITERT-BUTYPHENOL
0.2% max (wt)
TRANSMITTANCE
98% min 425nm
98% min 500nm
ACID VALUE,mg KOH/g
0.3% max
HYDROLYSIS TIME (90°C
WATER
）
14 h min
SOLUBILITY
1% ACETONE
30% TOLUENE
36% CHLOROFORM
4% ETHYL ACETATE
11% n-HEXANE
0.1% ETHANOL
36% DICHLOROETHANE
6% max PHENYLETHYLENE
0.01% max WATER
TEST ITEMS
SPECIFICATION
APPEARANCE
WHITE INCOMPACT POWDER
CONTENT
99.0% min
MELTING RANGE
183-187 °C
SOLUBILITY 2g/20ml TOLUENE
CLEAR
FREE 2,4-DITERT-BUTYPHENOL
0.2% max (wt)
TRANSMITTANCE
98% min 425nm
ACID VALUE,mg KOH/g
0.3% max
HYDROLYSIS TIME (90°C
WATER
）
14 h min
SOLUBILITY
1% ACETONE
Check Digit Verification of cas no
The CAS Registry Mumber 31570-04-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,5,7 and 0 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 31570-04:
(7*3)+(6*1)+(5*5)+(4*7)+(3*0)+(2*0)+(1*4)=84
84 % 10 = 4
So 31570-04-4 is a valid CAS Registry Number.
InChI:InChI=1/C14H21O3P/c1-13(2,3)10-7-8-12(17-18(15)16)11(9-10)14(4,5)6/h7-9H,1-6H3/q-2
31570-04-4Relevant articles and documents
Preparation method of phosphite antioxidant 168
-
Paragraph 0024-0030, (2019/04/27)
The invention discloses a preparation method of a phosphite antioxidant 168 and belongs to the technical field of antioxidant preparation. The preparation method is as follows: adding excessive 2,4-di-tert-butylphenol and a catalyst into a reaction kettle, adding phosphorus trichloride, and carrying out a synthetic reaction to generate tri(2,4-di-tert-butyl)phosphite; then, adding an anti-hydrolytic agent, then, carrying out filtration, and evaporating the excessive 2,4-di-tert-butylphenol in filtrate to obtain a crude product of tri(2,4-di-tert-butyl)phosphite; and then, crystallizing the crude product, and carrying out centrifuging, washing and drying to obtain a final finished product. By using the preparation method of the phosphite antioxidant 168, the consumption of raw materials isreduced, a reaction solvent is reduced, the reaction time is shortened, and the generation amount of byproducts is low; and a phosphite antioxidant 168 product prepared by using the preparation methodhas the characteristics of high purity (larger than or equal to 99%, low acid value (smaller than or equal to 0.3 mgKOH/g) and good hydrolysis resistance (PH is larger than or equal to 7).
Novel process route of synthesizing antioxidant 168
-
Paragraph 0038-0040; 0044-0046; 0050-0052; 0056-0058; 0062, (2018/09/26)
The invention provides an organic synthesis method of an antioxidant 168, namely tris(2,4-di-tert-butylphenyl) phosphite. The method comprises the following steps: taking a mixed solution of methanoland toluene as a solvent, and taking 2,4-di-tert-butylphenol and phosphorus trichloride as reactants. According to the invention, a supported catalyst is used, and the carrier and the active center ofthe catalyst are adjusted, so that the reaction is carried out more thoroughly, the yield and the purity of an finally obtained product are greatly improved, the highest yield can be up to 97.8%, thepurity can be up to 98.9%, and the yield and the purity are both obviously higher than the existing level. In the reaction for preparing the tris(2,4-di-tert-butylphenyl) phosphite provided by the invention, the usage amount of the catalyst is low, the reaction temperature is low, the post-treatment of the obtained product is simple, and the yield of a pilot plant test carried out by using the synthesis method provided by the invention is still up to 90% or above.
SOLID ALKYLARYL PHOSPHITE COMPOSITIONS AND METHODS FOR MANUFACTURING SAME
-
Page/Page column 36; 37, (2011/02/24)
The invention is directed to various alkylaryl phosphite compositions that ideally are suitable for use as secondary antioxidants in polymers. In one aspect, the phosphite composition comprises a tris(dialkylaryl)phosphite in an amount from 20 to 93 weight percent; and at least one of: a bis(dialkylaryl)monoalkylaryl phosphite; a bis(monoalkylaryl)dialkylaryl phosphite; and a tris(monoalkylaryl) phosphite. The inventive phosphite composition is a solid at ambient conditions. The invention also relates to alkylate compositions and processes for forming such alkylate compositions and such phosphite compositions.
COUMESTAN-LIKE ANTIOXIDANTS AND UV ABSORBANTS
-
, (2011/01/05)
The present invention relates to derivatives of the 1H-pyrano[4,3-b]benzofuran-1-one structure and their nitrogen analogues which possess powerful antioxidant properties combined with a highly effective UV absorbing functionality in one molecule. These compounds are especially useful in cosmetical and dermatological formulations.
Hydroxy-substituted N-alkoxy hindered amines and compositions stabilized therewith
-
, (2008/06/13)
Hindered amines substituted on the N-atom with an hydroxy-substituted alkoxy moiety are particularly effective in stabilizing organic polymer compositions against the deleterious effects of oxidative, thermal and actinic radiation where the presence of the OH group on the compounds adds important properties not otherwise attainable.
Substituted 5-heteroaryl-2-(2-hydroxyphenyl)-2h-benzotriazole UV absorbers, a process for preparation thereof and compositions stabilized therewith
-
, (2008/06/13)
Compounds of formula I or II where R is a heteroaryl moiety, such as 3-pyridyl, or T is a heteroaryl moiety, such as thien-2,5-diyl, and E1and E2are independently hydrogen, alkyl, aralkyl and the like, are prepared by reaction of a benzotriazole substituted on the 5-position of the benzo ring by a halogen atom with a heteroarylboronic acid or ester in the presence of a transition-metal catalyst, such as palladium (II) diacetate. The benzotriazole compounds of formula I are particularly efficacious as stabilizers for automotive coatings and candle wax.
Method for preparing stearically hindered aryl phosphites
-
, (2008/06/13)
A new process is disclosed for the manufacture of hindered aryl phosphites using derivatives of mercaptothiazole or dithiocarbamic acid as catalysts. Ortho-tertiary alkyl aryl phosphites are produced by the reaction of a phosphorus trihalide with an ortho-tertiary alkyl phenolic compound in the presence of the aforementioned catalysts.
