ASTM D4620-02(2007)
Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber

Standard No.

ASTM D4620-02(2007)

Release Date

2002

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4620-02(2012)

Latest

ASTM D4620-02(2021)

Scope

The surface area of zinc-oxide in rubber can significantly affect cure activation and vulcanizate properties.

The specific surface area of zinc-oxide is usually measured by nitrogen absorption which requires the use of equipment not normally found in rubber laboratories. This test method allows a ranking of zinc-oxide samples according to their surface areas with respect to a known standard using a simplified procedure involving mixing of rubber compounds and measuring cure times with oscillating disk or rotorless cure meters.

This test method may be used for quality control, research and development work, and comparison of different zinc-oxide samples.

1.1 This test method specifies the standard materials, mixing procedure, and test method for ranking zinc-oxide samples according to their specific surface area in a standard test formula based on chloroprene rubber (CR).

1.2 The ranking is based on the cure time of the standard CR formulation.

1.3 The accurate surface area cannot be determined by this test method, since factors other than surface area may influence the cure times to some extent (for example acidity, heavy metal traces, etc.).

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D4620-02(2007) Referenced Document

• ASTM D1646 Standard Test Method for RubberÐViscosity and Vulcanization Characteristics (Mooney Viscometer)
• ASTM D2084 Standard Test Method for Rubber Property-Vulcanization Using Oscillating Disk Cure Meter
• ASTM D3190 Standard Test Method for Rubber—Evaluation of Chloroprene Rubber (CR)
• ASTM D5289 Standard Test Method for Rubber Property8212;Vulcanization Using Rotorless Cure Meters

ASTM D4620-02(2007) history

• 2021 ASTM D4620-02(2021) Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber
• 2017 ASTM D4620-02(2017) Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber
• 2002 ASTM D4620-02(2012) Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber
• 2002 ASTM D4620-02(2007) Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber
• 2002 ASTM D4620-02 Standard Test Method for Evaluating the Effective Surface Area of Zinc-Oxide in Rubber
• 1998 ASTM D4620-98 Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber