Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D6099-18
• Năm ban hành / Publication date: 2018
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates
• Chỉ số phân loại Quốc tế (ICS) / By field: 83.040.01 - Nguyên vật liệu cho cao su và chất dẻo nói chung
• Số trang / Page: 3

Phạm vi áp dụng / Scope of standard

1.1 This test method determines the acidity, expressed as parts per million (ppm) of HCl, in aromatic isocyanate samples of greater than 100-ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-(4-phenylisocyanate) (see Note 1).

Note 1: This test method is equivalent to ISO 14898, Test Method A.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.