| 摘要 |
530,836. Preserving rubber latex. MONSANTO CHEMICAL CO. June 19, 1939, No. 17891. Convention date, June 20, 1938. [Class 70] Rubber latex is preserved from coagulation and putrefaction by adding thereto a small quantity of a water soluble or dilute alkali soluble salt of a tetra- or penta-chlorophenol or a mixture thereof. Examples are given of the use of the sodium salt alone or with a small quantity of ammonia. The potassium, ammonium, barium and calcium salts may also be used.
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