GB/T 13658-2015 in English

VALID

Polymethylene polyphenylene isocyanate

Issued on:2015-12-31
Implemented on:2016-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
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Standard No:	GB/T 13658-2015
Document status:	VALID
Title in English:	Polymethylene polyphenylene isocyanate
Title in Chinese:	多亚甲基多苯基异氰酸酯
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2015-12-31
Implemented on:	2016-07-01
Superseding:	GB/T 13658-1992 Polymethylene polyphenylene isocyanate
Professional Classification:	GB-National Standard
Related Keywords:	polymethylene polyphenylene isocyanate introduction interpretation liquid brown liquid isocyanate content polymethylene polyphenyl isocyanate isocyanate content acidity/ % ≤0.030 ≤0.030 ≤0.030 viscosity
Related Topics:	total acidity of isocyanate Isocyanates and hydrazines Hydrazide isocyanate Guanidine isothiocyanate Isocyanate GB/T 13658 Cyano detection Most ester groups GB/T 13658-2015 Phenyl diisocyanate Cyano detection Polyphenylene cyanide Guanidine isothiocyanate+ Ethyl cyanoacetate Isocyanate environment tsi isocyanate Cetyl isocyanate Ethyl cyanoformate Isobutylbenzene Aminophenylarsenite Ethyl cyanoacetate Phenoxyethanol and isocyanates o-polyphenyl chain Polyisocyanate content Isocyanation reaction phenylene and phenylene amino acid sequence Cyanocobalt Toluene diisocyanate method methyl methylene methine Methyl methylene absorption peak Paraformaldehyde Methyl isocyanate Formic acid ph methyl methylene methine cyano g Isocyanates and Crude Oil Ester peak Polymethanol Phenylene detection basis Isocyanates Air Quality. The absorption peak of methyl methylene methyl, methylene, methine Piperazine and isocyanate methylene Hydroxycyanogens and cyanohydrins Toluene diisocyanate prepolymer Ethyl cyanoformate mass spectrometry How many ester groups come out of the peak and the original heterozygosity Isocyanate Determination Mass Spectrometry Hydroxycyanohydrin Isocyanate Test methylated toluene Methylphenylphenylenediamine Ester polyphenylene diisocyanate Tetraphenylene diisocyanate di-p-phenylene diisocyanate ester group one peak methylene iodide Methylation of toluene Cyanate Isocyanate Technology Cyanate Isocyanate Technology Dodo Wiki Isocyanide methylene peak Phenyl isocyanate and alcohol polyacid material Methylene peak type Cyanamide Is Toluene Diisocyanate Toxic? Methyl and methylene peaks Cyano and Alkyne Cyanonitrile What is the content of toluene Mass Spectrometry Polyformic Acid Alkyne cyano methine and methylene Nitrile and cyano methylene absorption peak Cyano UV Methylene methylene d multi degree Toluene has many impurities Methyl methylene absorption peak methylene absorption peak Phenyl and phenylene Doya Peak shape of methylene Ethyl aminobenzoate methylsulfonate Phenyl hypobromite tert-butyl isocyanate Phenyl isocyanate cyanoamidine Isocyanate Density How many powers of sulfurous acid Propyl diphenylcyanide copper benzoate Isocyanate Limits m-toluic acid Isocyanate liquid phase analysis Baiduya tsi p-toluenesulfonyl isocyanate polyisocyanate GB/t+13658 Polyformic acid Polyurethane gb/t13658 Multivariate heterogeneity GBT13658 GB/T 13658-1992 GB/T 13658-2015 n-butyl isocyanate Isocyanate Reaction Benzoic acid Part 163: Toluene diisocyanate Tris(trimethylsilyl)phosphite [(2S)-1-cyano-2-propyl]carbamate tert-butyl ester Waterborne Polyisocyanate Analysis conditions of m-toluic acid Isothiocyanate and amino Isocyanates react with amines Mass spectrometry analysis of methyl benzoate Copper sulfate and methylene blue Methyl benzoate pesticides Toluene diisocyanate environmental quality enforcement Isocyanate detection method Detection of p-toluenesulfonamide isocyanate Isocyanate self-monitoring Isocyanate industry Exhaust gas isocyanate detection Isothiocyanate series products National testing method for toluene diisocyanate Isocyanate detection method Detection method of polymethylene polyphenyl isocyanate in exhaust gas Toluenesulfonyl Isocyanate Quality Polymethylene polyphenylene isocyanate industry m-Toluic acid quality Methyl benzoate company Isocyanate detection Preparation method of benzene isocyanate Synthesis method of isocyanate Toluene diisocyanate detection Isocyanate environmental testing What is p-toluic acid? Isocyanate preparation method Toluene diisocyanate industry Methylphenyl sulfoxide determination method Determination method of toluene diisocyanate Isocyanate emissions Methyl diisocyanate detection method Toluene diisocyanate detection method gb13658 gbt13658-2015

《GB/T 13658-2015多亚甲基多苯基异氰酸酯》由TC15（全国塑料标准化技术委员会）归口，TC15SC8（全国塑料标准化技术委员会聚氨酯塑料分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了多亚甲基多苯基异氰酸酯(以下简称聚合MDI)的要求、试验方法、检验规则及标志、包装、运输、贮存等。
本标准适用于苯胺经缩合、光气化、分离、精馏制得的多亚甲基多苯基异氰酸酯。

Introduction

Interpretation of GB/T13658-2015 Standard

1. Background and Significance of Standard Formulation

GB/T13658-2015 "Polymethylene Polyphenyl Isocyanate" is a national standard of the People's Republic of China, which is used to regulate the quality requirements of aromatic isocyanates used in polyurethane production. This standard replaces GB/T13658 (1992 edition). The main revisions include:

Added product classification
Cancelled the classification of qualified products, first-class products and superior products
Increased the acidity index to 0.030%
Changed the density from a random inspection item to a type inspection item

2. Scope of application of the standard

This standard applies to polymethylene polyphenyl isocyanates prepared by condensation, phosgenation, separation and distillation of aniline, which are widely used in:

Manufacturing of polyurethane rigid foam
Isocyanurate foam system
Coatings, adhesives, anti-seepage and plugging and other fields

Project	PM-200	PM-400	PM-600
Appearance	Brown liquid	Brown liquid	Brown liquid
Isocyanate content (-NCO)/%	30.5~32.0	30.0~32.0	30.0~32.0
Acidity/%	≤0.030	≤0.030	≤0.030
Viscosity (25℃)/(mPa·s)	150~250	350~500	501~800

3. Experimental methods and inspection rules

According to the standard, the main test methods include:

Determination of isocyanate content: GB/T12009.4
Determination of acidity: GB/T12009.5
Determination of viscosity: GB/T12009.3

4. Implementation suggestions

To ensure compliance with the standard, manufacturers should:

Establish a complete quality control system
Perform regular type inspection
Strictly follow packaging, transportation and storage requirements

More samples: DL/T 5154-2012 GB 50021-2001(2009) YD/T 3934-2021

Sample only — not a preview of GB/T 13658-2015

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