Description

Propionic Acid, 3,3-Diphenyl-, 1,2,2,6,6-Pentamethyl-4-Piperidinyl Est Er is a high-value hindered amine light stabilizer (HALS) derivative, specifically designed for superior polymer protection. This compound is critical for preventing the degradation of plastics and coatings caused by UV radiation and thermal oxidation. It is primarily needed by manufacturers in the polymer, specialty coatings, and advanced materials industries seeking to enhance the longevity and performance of their products.

Application

• Polymer Stabilization: Acts as a highly effective light stabilizer (HALS) in polyolefins (PP, PE), engineering plastics, and other polymers to prevent UV-induced degradation, color change, and loss of mechanical properties.
• Automotive Coatings & Plastics: Used in automotive clear coats, exterior trim, and under-the-hood components to ensure long-term gloss retention and weatherability.
• Industrial & Architectural Coatings: Incorporated into high-performance industrial, maintenance, and architectural coatings to protect against weathering, chalking, and cracking.
• Agricultural Films: Essential for stabilizing greenhouse films and mulch films, extending their functional life under intense sunlight.
• Adhesives & Sealants: Enhances the durability of high-performance adhesives and sealants exposed to outdoor conditions.
• Synthetic Fibers: Provides UV stabilization for polypropylene and polyethylene fibers used in outdoor textiles, geotextiles, and artificial turf.

Basic Information

Product Name	Propionic Acid, 3,3-Diphenyl-, 1,2,2,6,6-Pentamethyl-4-Piperidinyl Est Er
CAS No.	20811-87-4
Molecular Formula	C27H35NO2
Molecular Weight	405.58 g/mol
Synonyms	3,3-Diphenylpropionic Acid 1,2,2,6,6-Pentamethyl-4-piperidinyl Ester; 1,2,2,6,6-Pentamethyl-4-piperidinyl 3,3-diphenylpropionate; Tinuvin 440; Light Stabilizer 440; HALS-440; Bis(1,2,2,6,6-pentamethyl-4-piperidinyl) 3,3-diphenylpropionate (related structure); UV Stabilizer 20811-87-4; 4-Piperidinol, 1,2,2,6,6-pentamethyl-, 3,3-diphenylpropanoate
EINECS	Contact for details

Quality Control

Our production of Propionic Acid, 3,3-Diphenyl-, 1,2,2,6,6-Pentamethyl-4-Piperidinyl Est Er adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications for polymer additives. Certificates of Analysis (COA) detailing assay, identity, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and excessive heat.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.