Antioxidants, for polymers

The synthesis of an N-alkylarylamine by the reductive alkylation of an aromatic primary amine with a ketone is used in the preparation of antioxidants for polymers and rubber. The alkylation of an amine with a ketone is typically carried out in the liquid phase using heterogeneous catalysts such as Pd, Pt, Rh, or Ru supported on carbon (1,2). The reaction of ADPA with MIBK yields an imine, which then is hydrogenated over a Pt or sulfur promoted-Pt catalyst to yield 6-PPD. [Pg.481]

Nickel complexes are of considerable importance as stabilizers and antioxidants for polymers of various kinds. The nickel(II) complex of the benzoic acid derivative (12) (see Section 66.4) acts as a stabilizer against oxidation of polybutadiene,46 but is less effective in this respect than the manganese and cobalt complexes. Complex (20) is effective in decreasing the rate of photooxidation of two-phase poly(vinyl chloride)-polybutadiene rubbers 74... [Pg.1020]

Synthetic hindered phenols (Ph-OH) are one of the oldest and most important class of antioxidants for polymers. They act as efficient chain break-... [Pg.129]

Al-Malaika, S. Reactive antioxidants for polymers. In Reactive Modifiers in Polymers Al-Malaika, S., Ed. Blackie Academic Professional London, 1997 266-302. [Pg.100]

Uses Stabilizer, antioxidant for polymers, org. substrates, polyolefins, crosslinked PE systems esp. wire and cable, BR, SBR, NBR, SEBS, elastomer, petrol, prods., powd. and high-bake coatings, food pkg. food pkg. adhesives, paper, polymers, rubber Features Nondiscoloring, nonstaining... [Pg.439]

Uses Effective processing stabilizer, sec. antioxidant for polymers incl. filled polyolefins, ABS, PS, polybutylene, PBT, PC, thermoplastic polyester, nitrile barrier resins, and fibers peroxide decomposer for plastics mfg. reduces equipment corrosion in flame-retardant applies. antioxidant and color suppressant for powd. coatings antioxidant, stabilizer for food-grade polymers... [Pg.717]

Chem. Descrip. Didodecyl thiodipropionate CAS 123-28-4 EINECS/ELINCS 204-615-1 Uses Antioxidant for polymers, esp. PP, HOPE, LDPE, LLDPE, PS,ABS, PMMA, PA, PET, PBT, PC, POM, PU, in resinous/polymeric food-con-tact coatings preservative in foods antioxidant migrating from food pkg. Regulatory FDA 21CFR 175.300,181.24,182.3280 Properties Wh. powd. m.w. 514.9 m.p. 39-42 C < 0.1% ash Seenox DS [Shipro Kasei Kaisha]... [Pg.729]

Uses Antioxidant for polymer stabilization color and processing stabilizer for ABS, PC, PU, coatings, PET fiber sec. stabilizer for PVC Manuf/Distrib. Aldrich Dover Trade Names Weston PDDP... [Pg.1079]

Uses Stabilizer, sec. antioxidant for polymers and food-grade polymers antioxidant and color suppressant for powd. coatings... [Pg.1275]

Properties Wh. powd. sol. in common org. soivs. m.w. 836 sp.gr. 1.09 m.p. 100-102 C Uses Antioxidant for polymers incl. polyolefins, polystyrenes Manuf./Distrib. UniqemaAm. http //www. uniqema. com Trade Name Synonyms Topanol 205 t[Avecia http //www.avecia. com, http //www.aveciabiocides. com]... [Pg.506]

Uses Light stabilizer, free radical scavenger, antioxidant for polymers, polyolefins, food-grade polymers... [Pg.532]

Uses Antioxidant for polymer stabilization color and processing stabilizerfor ABS, PC,... [Pg.1357]

Empirical C16H14N4O2 Properties Wh. powd. sp.gr. 0.216 Uses Antioxidant for polymers copper deactivator stabilizer Manuf./Distrib. Eastman http //www. eastman. com Trade Name Synonyms Eastman Inhibitor OABH [Eastman http //www.eastman.com]-, MDA-1 t[Ciba Spec. Chems./Plastic Addit. http //WWW. cibasc. com]... [Pg.3006]

Hazardous Decomp. Prods. Thermal decomp, may produce oxides of carbon Uses Stabilizer, sec. antioxidant for polymers and food-grade polymers antioxidant and color suppressant for powd. coatings Regulatory FDA 21CFR 178.2010 Manuf./Distrib. Clariant http //www.clariant.com, http //WWW. clariant-northamerica. com Trade Name Synonyms Sandostab P-EPQ [Clariant/Pigments Addit. http //www.pa. clariant. com]... [Pg.3354]

Choose the structure that is commonly used as an antioxidant for polymers. [Pg.160]

Alvinox FB is highly efficient primary antioxidant for polymers. Its chemical structure includes three sterically hindered phenolic groups. It functions mainly as "radical scavenger" it reacts efficiently with peroxy radicals, thus slowing down the chain reaction process, which facilitates thenaal oxidation. [Pg.106]

Al-Malaika S. Vitamin E an effective biological antioxidant for polymer stabilisation. Polym... [Pg.416]

The most widely used antioxidants for polymer protection are phenolics. These products generally resist staining or discoloration. However, they may form quinoid structures upon oxidation, which lead to yellowing. Phenolic antioxidants include simple phenolics, bisphenolics, polyphenolics, and thiobisphenolics. Hindered phenolics, such as butylated hydroxy toluene (BHT), high molecular weight phenolics, and thiobisphenolics, are the most popular of the primary antioxidants. They are suitable as long-term stabilizers in almost all cases. [Pg.911]

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