Plastics. Polyols for use in the production of polyurethane. Determination of degree of unsaturation by microtitration Ingestion-build-232773

Plastics. Polyols for use in the production of polyurethane. Determination of degree of unsaturation by microtitration Ingestion-build-2327731 Scope This International Standard specifies a microtitration method to measure the degree of unsaturation in polyether polyols used in the production of polyurethanes. It is based on the reaction of mercuric acetate with double bonds in the polyol. It does not apply to compounds in which the unsaturation is conjugated with carbonyl, carboxyl or nitrile groups. The product being measured must be essentially dry and free of inorganic salts, especially

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It specifies technical requirements and corresponding test methods for test sieves of perforated metal plate and applies to test sieves having:

It outlines requirements for acceptable performance and specifies procedures for demonstrating conformance to this international standard

hot-dip galvanizing (galvanic coating)

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improve customer confidence and trust in such services

together with subsequent validation

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