ASTM D1076-23
Standard Specification for Rubber—Concentrated, Ammonia Stabilized, Creamed, and Centrifuged Natural Latex

Standard No.

ASTM D1076-23

Release Date

2023

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1076-23

Scope

1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1—Centrifuged Hevea natural latex stabilized with ammonia only. Category 2—Creamed Hevea natural latex stabilized with ammonia only. Category 3—Centrifuged Hevea natural latex stabilized with low ammonia. Category 4—Centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing less than 200 µg total protein per gram dry weight of latex, with ammonia or other hydroxide. Category 5—Centrifuged Hevea natural latex treated with aluminum hydroxide or by other means, stabilized with ammonia only containing less than 0.5 % non-rubber content. 1.2 This specification is not necessarily applicable to latices prepared, stabilized, or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other categories of latices. It does apply to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates. 1.3 The analytical procedures applicable to the specifications are included and appear in the following order: Section Sampling 6 and 7 Total Solids 8 – 17 Dry Rubber Content 18 Protein Content 19 Total Alkalinity 20 Viscosity 21 Sludge Content 22 Coagulum Content 23 KOH Number 24 pH 25 Mechanical Stability 26 Copper and Manganese 27 Density 28 – 40 Volatile Fatty Acids 41 – 45 Boric Acid 46 Dry Films 47 Precision for All Test Methods 48 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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.

ASTM D1076-23 Referenced Document

• ASTM D1278 Standard Test Methods for Rubber from Natural Sources—Chemical Analysis
• ASTM D4483 Standard Practice for Determining Precision for Test Method Standards in the Rubber and Carbon Black Industries
• ASTM D5712 Standard Test Method for Analysis of Aqueous Extractable Protein in Natural Rubber and Its Products Using the Modified Lowry Method
• ASTM D6499 Standard Test Method for Immunological Measurement of Antigenic Protein in Hevea Natural Rubber (HNR) and its Products
• ASTM E70 Standard Test Method for pH of Aqueous Solutions With the Glass Electrode

ASTM D1076-23 history

• 2023 ASTM D1076-23 Standard Specification for Rubber—Concentrated, Ammonia Stabilized, Creamed, and Centrifuged Natural Latex
• 2021 ASTM D1076-21 Standard Specification for Rubber—Concentrated, Ammonia Stabilized, Creamed, and Centrifuged Natural Latex
• 2020 ASTM D1076-15(2020) Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 2015 ASTM D1076-15 Standard Specification for Rubber&x2014;Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 2014 ASTM D1076-14 Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 2010 ASTM D1076-10 Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 2006 ASTM D1076-06 Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 2002 ASTM D1076-02 Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
• 1997 ASTM D1076-97 Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex