HG/T 2409-1992
Determination of isoamyl ester group content in polyurethane prepolymer (English Version)
- Standard No.
- HG/T 2409-1992
- Language
- Chinese, Available in English version
- Release Date
- 1992
- Published By
- Professional Standard - Chemical Industry
- Status
- 2024-07
- Replace By
- HG/T 2409-2023
- Latest
- HG/T 2409-2023
- Scope
- This standard specifies the method for determination of isocyanate group (NCO) content in polyurethane prepolymers or intermediate products. This standard is applicable to the determination of isocyanate group content in polyurethane prepolymers or intermediate products. The diisocyanate in this standard sample has certain toxicity (for example, the allowable concentration TLV of 2,4 toluene dicyanoate is 0.02 ppm. In order to avoid inhaling its vapor and preventing direct skin contact with it, the analysis process needs to be carried out under good conditions. Carry out under ventilation.
HG/T 2409-1992 history
- 2023 HG/T 2409-2023 Determination of isocyanate group content in polyurethane prepolymer
- 1992 HG/T 2409-1992 Determination of isoamyl ester group content in polyurethane prepolymer
