Rianlon RIANOX Antioxidants and RIASORB UV Stabilizers for Polymers

Selection and quotation of Rianlon anti-aging additives: RIANOX 1010, 1098 and 168 antioxidants, RIASORB UV-360 UV absorbers and UV-944 hindered amine stabilizers, U-pack blends and intermediates.

RIANOX 1010, 1076, 1098 and 245 Primary Antioxidants

Hindered phenolic antioxidants protect polymers against thermal oxidation in processing and service. The range covers 1010, 1076, 245, 3114, grade 1098 for polyamides, liquid 1135 and 1520, sulfur-containing 1035 and metal deactivators MD-1024 and 697.

  • 1010: molecular weight 1178
  • 1010 melting range: 110–125 °C
  • 1098: grade for polyamides
  • MD-1024 and 697 metal deactivators

RIANOX 168, 626 and 412S Secondary Antioxidants

Phosphite and thioester antioxidants are used together with hindered phenolic primary grades. The range covers phosphites 168, 626 and the new 686, and thioesters DSTP, DLTP and 412S. Grade 168 has low volatility and good hydrolysis resistance.

  • 168: molecular weight 647
  • 168 melting range: 183–187 °C
  • Phosphites 168, 626 and 686
  • Thioesters DSTP, DLTP and 412S

RIASORB UV-326, UV-360 and UV-1130 UV Absorbers

Benzotriazole and triazine absorbers take up ultraviolet light and slow photo-aging. Benzotriazoles include UV-326, UV-328, UV-329, UV-P, UV-234, liquid UV-1130 and coating grades UV-384-2 and UV-928; triazines are UV-400, UV-405 and UV-460. UV-360 has very low volatility.

  • UV-360: molecular weight 659
  • UV-360 melting range: 192–198 °C
  • Triazines UV-400, UV-405 and UV-460
  • Liquid grades UV-1130 and UV-400

RIASORB UV-944, UV-622 and UV-123 HALS

Hindered amine light stabilizers: polymeric UV-944 and UV-622, block oligomeric UV-2020, low molecular weight UV-770DF and UV-292, low alkaline liquid UV-123, plus UV-3853, UV-119S and multifunctional UV-660 for polyamides.

  • UV-944: Mn 2000–3100
  • UV-944 melting range: 100–135 °C
  • UV-123: low alkaline liquid
  • UV-660: grade for polyamides

U-pack B225, B900 and UV-783 Additive Blends

U-pack blends combine antioxidants or light stabilizers in a single grade. Antioxidant blends are B225, B215, B220, B561, 621B, B900, B1171, B1411 and B2777; light stabilizer blends UV-783, UV-791 and UV-111 serve polyolefins. Blend makeup is checked against the maker catalog.

  • Antioxidant blends B225, B215 and B220
  • Blends B1171 and B1411
  • Light stabilizer blends UV-783 and UV-791
  • UV-111 blend for polyolefins

Intermediates and Polymerization Inhibitors

The intermediates range covers 1,10-decamethylenediamine, sebacic acid, dimethyl and dibutyl sebacate, tetramethylpiperidinol, tetramethylpiperidone and pentamethylpiperidinol. Polymerization inhibitors are grades 701 (4-hydroxy TEMPO), 702 and 706.

  • Decamethylenediamine and sebacic acid
  • Dimethyl and dibutyl sebacate
  • Tetramethylpiperidinol and piperidone
  • Inhibitors 701, 702 and 706

Pairing Primary and Secondary Antioxidants

The hindered phenolic primary antioxidant RIANOX 1010 has low volatility and good compatibility with the polymer, and the maker notes it is often compounded with a phosphite. Phosphite 168 resists hydrolysis and is likewise intended for use with phenolic grades.

The ready U-pack B225 blend combines 168 and 1010 by the substance numbers in the catalog, so we check it against formulations where these grades are dosed separately to keep the primary to secondary ratio.

Light Stabilization by Part Thickness and Polymer

For thin products such as fibers and films the maker points to the polymeric hindered amine stabilizer RIASORB UV-944: it resists extraction and also improves thermal oxidative aging resistance.

For polycarbonate, polyamide and polyacetal the benzotriazole UV-360 fits: it has very low volatility and does not bloom out of the material at higher loadings. UV-384-2 and UV-928 serve coatings exposed to high temperatures, and the multifunctional UV-660 targets polyamides.

Volatility, Color and Physical Form

For polyamides the maker singles out phenolic RIANOX 1098: it has little influence on material color before and after aging, with a melting range of 156–162 °C. For liquid dosing the range offers liquid phenolic 1135 and multifunctional 1520, liquid UV absorbers UV-1130 and triazine UV-400, and liquid hindered amines UV-123 and UV-292.

Powder grades are checked by melting range: 110–125 °C for 1010, 183–187 °C for 168 and 192–198 °C for UV-360.

Grade Check and Batch Quotation

For selection we check the polymer and processing route, part thickness, color and volatility requirements and the primary and secondary antioxidant pair. Grade and equivalent are agreed on the maker technical data sheet (TDS) for the formulation.

The maker runs six production bases and keeps every grade on two sites with a backup line. Packing: RIANOX 1010 in 20 kg PE bags, RIASORB UV-944 in 25 kg cartons.

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