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1.1 This test method covers the measurement of the apparent pH of a water extract of an acetone solution of water insoluble phenol-formaldehyde resin. 1.2 This standard does not purport to address all of the safety problems 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.

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1.1 These test methods cover the determination of the amount of apparent free phenol in synthetic phenolic resins or solutions used for coating purposes. The test method for isolation of the free phenol applies to all the commonly used resins except those containing p-phenyl-phenol. Test Method A applies to the simpler phenols up to and including the xylenols; Test Method B applies to the common alkylated phenols. >1.2 This standard does not purport to address all of the safety problems, 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. >

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DIN 53420 Testing of Cellular Materials; Determination of Apparent Density 废止 发布日期 :  2001-12-01 实施日期 : 

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