Natural Rubber Latex Properties

Usage of Natural latex?

• Coatings

• Balloons

• Paints

• Adhesives

What is the main things in the rubber fractions?

• Proteins, carbohydrates, and metals

• Proteins, amino acids, and others

• Proteins, metal, and amino acids

• Protein, lipids, and metals

Where are the non-rubbers in Hevea Latex?

• Serum phase

• Bottom fraction

• Frey Wyssling particles

• Rubber fraction

There are two types of latex allergy mentioned in the slide, which one is the Type 4 allergy?

• Protein Allergy

• Chemical Allergy

• Skin Allergy

• Protein and chemical allergy

What is the function of Ammonia in NR latex?

• To stabilize latex

• To prevent premature coagulation

• Can inhibit bacteria action arising from high pH condition

• All of the above

How to handle commercial rate of NR latex?

• Avoid direct sunlight

• Stainless steel with epoxy container

• Tightly container

• All of the above

What is the chemical reaction takes place when latex is centrifuged?

• Latex destabilized

• H+ from acid neutralize the -ve charges

• Mg2+ converted to precipitate

• Removal of protein

What is the TSC % for Low Ammonium latex?

• 61%

• 45.5%

• 100%

• 10%

Latex particles stabilized by below except :

• Long chain fatty acid

• Adsorbed protein

• Metallic ions

• Polypeptides

Below are NR destabilized by, excepts for

• Evaporation

• Acidic substances

• Organic solvent

• Addition of ammonia