Standard No.:	GB/T 11409.3-2003
Chinese Name:	橡胶防老剂、硫化促进剂 软化点的测定
English Name:	Test method of softening point for rubber antiagers and vulcanizing accelerators
Professional Classification:	G70 Basic standards and general methods for chemical additive
Professional Classification:	GB National Standard
ICS Classification:	83.040.20 Rubber compounding ingredients
Issued by:
Issued on:	2003-01-10
Implemented on:	2003-07-01
Status:	ABOLISHED
Replace:	GB/T11409.3-1989 Test method of softening point for rubber antiager and vulcanizing accelerators
Replace By:	GB/T11409-2008 Test methods rubber antiagers and vulcanizing accelerators
Replace By Date:	2009-02-01
Language:	English
File Format:	PDF
Word Count:
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1 Scope

This standard specifies the ring-and-ball method to determine the softening points for rubber antiagers and vulcanization accelerators.
This standard is applicable to the determination of softening points for rubber antiagers and vulcanization accelerators.

2 Method Summary

Put the steel ball with specified mass on the specimen ring full of specimen; heat the assembly at the constant heating speed; the specimen softens and falls, under the gravity action of the steel ball, with the steel ball to the specified distance and temperature at this moment is the softening point of the specimen.