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BLS® 2908

1 of 21 products in this brand
BLS 2908 (67845-93-6)is a benzoate-type light stabilizer that functions by scavenging free radicals formed During the photodegradation of plastic materials. Combinations of this product with hindered amine light stabilizers (HALS) often provide superior performance vs. HALS used alone, especially in polyolefin substrates. BLS 2908 is non-discoloring, has good compatibility with polyolefinsubstrates, is resistant to extraction, and is FDA-cleared for use in many types of polyolefins for indirect food contact applications.

Functions: Light Stabilizer

Compatible Polymers & Resins: Polyethylenes (PE), Polypropylenes (PP)

Features: Low Volatility

Synonyms: 3,5-Bis(1,1-dimethylethyl)-4-hydroxybenzoic acid hexadecyl ester, 3,5-Di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester, Antioxidant 2908, Hexadecyl 4-hydroxy-3,5-di(tert-butyl)benzoate, Light Stabilizer 2908

Technical Data Sheet
  • TypeDocument Name
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Knowde Enhanced TDS

Identification & Functionality

Chemical Name

Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate

Plastics & Elastomers Functions

Light Stabilizer

CAS No.
67845-93-6
EC No.
267-342-2
Technologies

Elastomers,

Plastics

Product Families

Elastomers — Elastomer Additives

Antioxidants & Stabilizers

Plastics — Polymer Additives

Antioxidants & Stabilizers

Features & Benefits

Materials Features

Low Volatility

Advantages
  • Provides excellent light stability to polyolefins and other plastics when used in combination with HALS and (optionally) UV absorbers 
  • Improves the stability of polyolefins during processing and end use at moderate temperatures 
  • Non-discoloring 
  • Excellent compatibility with polyolefins, resistant to extraction and migration 
  • Low volatility 
  • FDA-cleared for use in polyolefins

Applications & Uses

Markets

Adhesives & Sealants,

Printing & Packaging

Applications

Printing & Packaging — Packaging

Food & Beverage Packaging

Adhesives & Sealants — Packaging & Paper

Tape & Label Adhesives

Printing & Packaging — Tapes, Labels & Adhesives

Other Tapes, Labels & Adhesives,

Tapes & Labels

Compatible Polymers & Resins

Polyethylenes (PE),

Polypropylenes (PP)

Use Level
0.1 to 0.5%
Applications

BLS 2908 is a benzoate-type light stabilizer recommended for use in combination with HALS and (optionally) UV absorbers in polyolefins. Potential applications include polypropylene and TPO thick-section parts and polyethylene (HDPE, LLDPE, LDPE) moldings, films, and tapes

Guidelines for Use

Recommended concentrations in polyolefins range from 0.1 to 0.5%. The use of BLS 2908 in combination with HALS such as BLS 1770 and/or BLS 1944 is recommended for thick-section polypropylene applications. These combinations generally give superior performance as compared to HALS used alone. In some cases the addition of a UV absorber such as BLS 531 or BLS 1326 can provide further improvements in performance. In polyethylene the use of BLS 2908 in combination with HALS such as BLS 783 or BLS 1944 is recommended. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use

Properties

Physical Form

Solid

Compatible with
Polyolefins
Typical Properties
ValueUnitsTest Method / Conditions
Melting Point55-65°C—
Molecular Weight474.82g/mol—

Regulatory & Compliance

Certifications & Compliance

FDA 21 CFR Regulations

FDA Regulations

BLS 2908 has been cleared for use in olefin polymers under 21 CFR §178.2010

Storage & Handling

Shelf Life
24 Months
Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.