JIS K 1557-3:2007
Plastics -- Polyols for use in the production of polyurethane -- Part 3: Determination of degree of unsaturation by microtitration

Standard No.

JIS K 1557-3:2007

Release Date

2007

Published By

Japanese Industrial Standards Committee (JISC)

Latest

JIS K 1557-3:2007

Replace

JIS K 1557:1970

Scope

This standard specifies how to determine the degree of unsaturation in polyether polyols used as raw materials for polyurethane by microtitration. This method is based on the reaction of double bonds in polyols with mercury acetate. It cannot be applied to unsaturated compounds conjugated with carbonyl, carboxyl, or nitrile groups. The samples used for measurements must be dry and free of inorganic salts, especially halides.

JIS K 1557-3:2007 Referenced Document

• ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
• ISO 6353-2:1983 Reagents for chemical analysis; Part 2 : Specifications; First series
• ISO 6353-3:1987 Reagents for chemical analysis; Part 3 : Specifications; Second series
• JIS K 8001 General rules for test methods of reagents*， 2017-02-20 Update
• JIS R 3505 Volumetric glassware

JIS K 1557-3:2007 history

• 2007 JIS K 1557-1:2007 Plastics -- Polyols for use in the production of polyurethane -- Part 1: Determination of hydroxyl number
• 1970 JIS K 1557:1970 Testing method of polyether for polyurethane