Description

1,2,3,4-Butanetetracarboxylic acid, tetramethyl ester, reaction products with 2,2,6,6-tetramethyl-4-piperidinol and beta,beta,beta',beta'-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol is a high-performance, multifunctional hindered amine light stabilizer (HALS) and crosslinking agent. This compound is engineered to provide exceptional long-term thermal and UV stability to polymeric materials, preventing degradation and extending service life. It is a critical additive for manufacturers in the plastics, coatings, and specialty polymer industries seeking to enhance the durability of their products under demanding environmental conditions.

Application

• Polymer Stabilization: Primary use as a high-efficiency hindered amine light stabilizer (HALS) in polyolefins (PP, PE), engineering plastics, and thermoplastic elastomers to prevent photo-oxidative degradation.
• Automotive Coatings and Plastics: Imparts UV resistance to exterior automotive parts, coatings, and trim, protecting against color fade, gloss loss, and surface cracking.
• Industrial and Architectural Coatings: Enhances the weatherability of protective coatings for buildings, industrial equipment, and outdoor structures.
• Agricultural Films and Geotextiles: Extends the functional lifespan of polyethylene and polypropylene films used in agriculture and construction by stabilizing against sunlight exposure.
• Wire and Cable Insulation: Provides thermal aging resistance and UV protection for insulating materials, ensuring long-term performance and safety.
• Crosslinking Agent for Polymers: The multifunctional structure can act as a crosslinker in specific polymer systems, improving mechanical properties and heat resistance.
• Advanced Composite Materials: Used in fiber-reinforced composites to maintain matrix integrity and performance in outdoor applications.

Basic Information

Product Name	1,2,3,4-Butanetetracarboxylic acid, tetramethyl ester, reaction products with 2,2,6,6-tetramethyl-4-piperidinol and beta,beta,beta',beta'-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol
CAS No.	85631-01-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	HALS based on BTCA tetramethyl ester and TMP; Polymeric Hindered Amine Light Stabilizer; UV Stabilizer 85631-01-2; Reaction product of 1,2,3,4-butanetetracarboxylic acid, tetramethyl ester with 2,2,6,6-tetramethyl-4-piperidinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane; Tetramethyl butanetetracarboxylate-TMP-HALS adduct; Spirocyclic HALS derivative; Light stabilizer for polyolefins CAS 85631-01-2
EINECS	Contact for details

Quality Control

Our production of this advanced stabilizer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Quality is verified through a suite of analytical techniques including HPLC, GPC, and spectroscopic methods to confirm chemical identity, purity, and functional group content. Certificates of Analysis (COA) documenting key specifications are provided with every shipment. We support compliance with relevant global regulatory frameworks for polymer additives.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	White to light yellow powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Ash Content	≤ 0.5%
Primary Amine Content	Contact for details

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