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About

Product Types

  • System

Material

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General Characterization

Bayflex® 5253 is a moldable microcellular polyurethane foam, designed for high production molded gasket applications such as radial seal filters.

Storage Conditions

Avoid moisture contamination during storage, handling, and processing. For both components, pad containers with either nitrogen or dry air (desiccant cartridge or air dryer at -40°F dew point).
Store poly component B from 18 °C to 30 °C (65°F to 85°F). Mix poly component to a homogenous state before use and before removing any material from container.
For optimum shelf life, the recommended storage temperature for the isocyanate component is 20 °C to 35 °C (68°F to 95°F). Do not expose isocyanate component to lower temperatures – freezing may occur.

Sampling

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Packaging Type

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Cream Time seg 26 ± 3
Material Temperature °C 30 - 40
Mold Temperature °C 53 ± 5
Free Rise Density kg/m^3 255
Mix Ratio by Weigh polyol/isocyanate 100/48
Rise Time seg 78 ± 4

Specifications

Property Name Test Method Unit Value
Dynamic Viscosity 25 °C mPa.s 1200
Specific Gravity approx. 1.05
POLYOL
Appearance Black liquid
No. OH mg KOH/g 138
Water Content wt. % max. 0.3

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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