This International Standard specifies a gas-chromatographic method for determining monomeric diisocyanates such as toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate and other diisocyanates in isocyanate resins as defined in clause 3 and in solutions prepared from such resins, insofar as these are used in the formulation of paints and similar coating materials.
note:1) The term "toluene diisocyanate" is used here and in the following text for 4-methyl-1,3-phenylene diisocyanate (2,4-toluene diisocyanate) and 2-methyl-1,3-phenylene diisocyanate (2,6-toluene diisocyanate).
2) The term "isophorone diisocyanate" is used here and in the following text for 2-(isocyanatomethyl)-3,5,5-trimethylcyclohexylisocyanate. The stereoisomers are identified at the appropriate points in the text by (I) and (II).
3) The term "diphenylmethane diisocyanate" is used here and in the following text for 4,4-diisocyanatodiphenylmethane, 2,4-diisocyanatodiphenylmethane and 2,2-diisocyanatodiphenylmethane.
BS 6782-10:1998 history
1998BS 6782-10:1998 Binders for paints - Determination of monomeric diisocyanates in polyisocyanate resins