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Normas ASTM – AENOR
ASTM D1076-02

ASTM D1076-02

Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex

Fecha:
2017-08-16 /Historical
Superseeded by:
Scope:

1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following types:

Type 1-Centrifuged natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Type 2-Creamed natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Type 3-Centrifuged natural latex preserved with low ammonia with other necessary preservatives.

1.2 This specification is not necessarily applicable to latices prepared or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other types of latices. It does not apply to natural latex sources other than Hevea braziliensisnor to compounded latex concentrates.

1.3 The analytical procedures applicable to the specifications are included and appear in the following order:

Section
Sampling6 and 7
Total Solids8
Dry Rubber Content9
Total Alkalinity10
Viscosity11
Sludge Content12
Coagulum Content13
KOH Number14
pH15
Mechanical Stability16
Copper and Manganese17
Density18-30
Volatile Fatty Acids31-35
Boric Acid36
Dry Films37
Precision for All Test Methods38

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

Keywords:
rubber; latex; ammonia; natural; latices
57,27
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