GB/T 37042-2018 in English

VALID

Hexamethylene diisocyanate

Issued on:2018-12-28
Implemented on:2019-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 37042-2018
Document status:	VALID
Title in English:	Hexamethylene diisocyanate
Title in Chinese:	六亚甲基二异氰酸酯
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2018-12-28
Implemented on:	2019-07-01
ICS Classification:	83.040-Raw materials for rubber and plastics
Chinese Classification:	G32-Synthetic resin and plastic
Professional Classification:	GB-National Standard
Related Keywords:	technological evolution hexamethylene diisocyanate diisocyanate introduction in-depth interpretation standard frameworks standard dimensions gb/t diisocyanate hexamethylene
Related Topics:	total acidity of isocyanate Hexamidine diisocyanate Diisocyanate Diisocyanate Isocyanates and hydrazines Hydrazide isocyanate Guanidine isothiocyanate Isocyanate Guanidine Isothiocyanate Analysis Phenyl diisocyanate Guanidine isothiocyanate+ Ethyl cyanoacetate Isocyanate environment tsi isocyanate Cetyl isocyanate Ethyl cyanoformate Ethyl cyanoacetate Phenoxyethanol and isocyanates ferrocyanide sulfate Isocyanation reaction Toluene diisocyanate method methyl methylene methine Methyl methylene absorption peak Isocyanic acid methyl methylene methine cyano g Isocyanates and Crude Oil Liquid Chromatography Isocyanates Butyl hexahexabenzoate Isocyanates Air Quality. The absorption peak of methyl methylene methyl, methylene, methine Isocyanate food grade Piperazine and isocyanate methylene Hydroxycyanogens and cyanohydrins Toluene diisocyanate prepolymer Ethyl cyanoformate mass spectrometry Isocyanate Test Method Subunit Isocyanate Determination Mass Spectrometry Hydroxycyanohydrin Isocyanate Test Hexadimethylaminodigallium diisopropyl methyl phosphate Tetraphenylene diisocyanate Tetradiisocyanate di-p-phenylene diisocyanate Diisocyanate methylene iodide Dimethyl tellurium Hexamethylene diisocyanate Cyanate Isocyanate Technology Cyanate Isocyanate Technology Isocyanide Cetyl Alcohol Vapor Phase methylene peak MHHH Phenyl isocyanate and alcohol methylene diisocyanate gem dimethyl Toluene diisocyanate is toxic Methylene peak type Is Toluene Diisocyanate Toxic? Dimethyl peak Methyl and methylene peaks Cyano and Alkyne Cyanate+ gem dimethyl Alkyne cyano methine and methylene Secondary carbamate methylene absorption peak Methylene methylene isopropyl gem dimethyl Methyl methylene absorption peak methylene absorption peak Peak shape of methylene tert-butyl isocyanate Isocyanate Standard 666 isooctane peak Used Subseries cyanoamidine Gem diacid ester Hexyl isocyanate Isocyanate Density Isocyanate Limits dilinoleic acid Isocyanate liquid phase analysis hdl diisocyanate Polyurethane hdl diisocyanate Two Jia Yasa Dimethylsulfone GBT37042 GB/T 37042-2018 n-butyl isocyanate Isocyanate Reaction Part 163: Toluene diisocyanate diphenylmethane diisocyanate in water Diphenylmethane diisocyanate in soil Diphenylmethane diisocyanate (HDI) in soil Waterborne Polyisocyanate Methylation mechanism of dimethyl sulfate Methylation mechanism of dimethyl sulfate Isothiocyanate and amino Isocyanates react with amines Dimethyl sulfate hydrolysis rate Copper sulfate and methylene blue Toluene diisocyanate environmental quality enforcement Isocyanate detection method Guanidine isothiocyanate quality Isocyanate self-monitoring Isocyanate industry Exhaust gas isocyanate detection Isothiocyanate series products National testing method for toluene diisocyanate How to detect dimethyl sulfate Isocyanate detection method Toluenesulfonyl Isocyanate Quality Polymethylene polyphenylene isocyanate industry Isocyanate detection diethyl phosphite Preparation method of benzene isocyanate Synthesis method of isocyanate Dimethyl sulfate quality diethyl phosphite Diisocyanate content in exhaust gas Toluene diisocyanate detection Isocyanate environmental testing Isocyanate dimer detection method Isocyanate preparation method Isocyanate reference Dimethyl sulfate fire extinguishing method Toluene diisocyanate industry Determination method of toluene diisocyanate Determination method of diphenylmethane diisocyanate Isocyanate emissions Methyl diisocyanate detection method Toluene diisocyanate detection method

《GB/T 37042-2018六亚甲基二异氰酸酯》由TC63（全国化学标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。

Introduction

In-depth interpretation of GB/T 37042—2018 Hexamethylene diisocyanate standard

1. Background of standard formulation and analysis of technological evolution

Hexamethylene diisocyanate (HDI) is an important industrial chemical raw material, widely used in polyurethane production and other fields. The formulation of GB/T 37042—2018 standard fills the gap in domestic technical requirements and testing methods for HDI, ensuring that product quality meets international standards.

With the rapid development of my country's chemical industry, the market demand for HDI is growing. The introduction of this standard provides clear technical guidance for production enterprises and also provides an effective basis for law enforcement for regulatory authorities.

2. Comparative analysis of standard frameworks

Standard dimensions	GB/T 37042—2018	Compared with international standards
Technical requirements	Purity ≥99.50%, isocyanate content ≥49.70%	In line with ISO standards, with high consistency of indicators
Test methods	Gas chromatography (Appendix A) and potentiometric titration (Appendix B)	Comply with globally accepted testing specifications
Safety requirements	Clarify the identification and protection measures for hazardous chemicals	Detail the requirements for occupational health protection

3. Practical application case analysis

Case 1: HDI purity detection

A manufacturer used gas chromatography to measure the purity of HDI products. The results showed that the purity was 99.65%, which met the standard requirements. The repeatability error of this method was only 0.10%, which verified the effectiveness of Appendix A of the standard.

Case 2: Hydrolyzed chlorine content detection

The hydrolyzed chlorine content in HDI was determined by potentiometric titration, and the result was 85 mg/kg, which was lower than the standard index (100 mg/kg), indicating that the production process was well controlled.

4. Implementation Suggestions

Manufacturers: It is recommended to establish a sound quality control system, conduct regular inspections in accordance with Appendix A and B of the standard, and keep good inspection records.
Regulatory authorities: Strengthen supervision and spot checks on HDI products, especially focusing on the quality of products of small enterprises.
User units: Before using HDI products, it is recommended to request a safety data sheet (SDS) and operate in strict accordance with the protection requirements.

More samples: JC/T 2453-2018 GB 50021-2001(2009) NB/T 47013.2-2015

Sample only — not a preview of GB/T 37042-2018