U-pack® B225

Identification & Functionality

Chemical Family

Phenols & Phenolics,

Phosphites

Chemical Name

Pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate),

Tris(2,4-ditert-butylphenyl) phosphite

Plastics & Elastomers Functions

Antioxidant

Technologies

Elastomers,

Plastics

Product Families

Elastomers — Elastomer Additives

Antioxidants & Stabilizers

Plastics — Polymer Additives

Antioxidants & Stabilizers

Molecular Formula

C₄₂H₆₃O₃P, C₇₃H₁₀₈O₁₂

Chemical Structure

                          C₄₂H₆₃O₃P                                                C₇₃H₁₀₈O₁₂

Features & Benefits

Materials Features

Good Thermal Stability,

Heat Aging Resistant,

Low Color Formation

Applications & Uses

Compatible Polymers & Resins

Ethylene Vinyl Acetate (EVA),

Polybutene,

Polyethylenes (PE),

Polyolefins,

Polypropylenes (PP),

Polyurethanes (PU)

Use Level

0.1 - 0.25%

Applications

U-pack® B225 is used in polyolefins and olefin-copolymers such as polyethylene, polypropylene, polybutene and ethylene-vinylacetate copolymers. The blend can also be used in other polymers such as engineering plastics, styrene homo- and copolymers, polyurethanes, elastomers, adhesives, and other organic substrates. U-pack® B225 can be used in combination with light stabilizers of the RIASORB® range.
U-pack® B225 is a convenient blend addressing a range of stabilization needs. The relatively high phenolic antioxidant content of U-pack® B225 addresses applications requiring more long-term thermal stability. In the recommended applications U-pack® B225 provides significant benefits, such as maintenance of original melt flow, low color formation, long-term-thermal stability. In polyolefins, the concentration levels for U-pack® B225 range typically between 0.1% and 0.25% depending on substrate and processing conditions. The optimum level is application specific.

Properties

Physical Form

Powder,

Solid

Appearance

White to off - white powder

Typical Properties

	Value	Units	Test Method / Conditions
Molecular Weight (C₄₂H₆₃O₃P)	647	—	—
Molecular Weight (C₇₃H₁₀₈O₁₂)	1178	—	—

Regulatory & Compliance

Certifications & Compliance

ISO 14001,

OHSAS

Safety & Health

Handling & Safety

The use of proper protective equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling.

Storage & Handling

Shelf Life

12 Months

Storage Conditions

Store the product in a cool, dry, well-ventilated area away from incompatible materials, keep tightly closed. With proper storage, shelf life of this product is 12 months from the manufacture date.