Artificial rubber

Resin, Synth. Rubber, Artificial Synth. Fibers 63.334 14.9... 

Rubber—Collected works. 2. Rubber, Artificial—Collected works. I. Series. 

Colourless liquid b.p. 69 5 C. Manufactured from propanone by conversion to pinacone and passing its vapour over heated KHSO4. Slowly changes to a rubber-like substance the change is hastened by metallic sodium or peroxides. Used in the manufacture of artificial rubber. 

The polycondensation of di-isocyanates with polyhydric alcohols gives a wide range of polyurethanes which are used as artificial rubbers and light-weight foams, and have other important properties. Isocyanates are also used as modifiers in alkyd resins. ... 

Material characteristics, both chemical and physical, should be considered, especially flowabihty. Abrasiveness, friability, and lump size are also important. Chemical effects (e.g., the effect of oil on rubber or of acids on metal) may dictate the structural materials out of which conveyor components are fabricated. Moisture or oxidation effects from exposure to the atmosphere may be harmful to the material being conveyed and require total enclosure of the conveyor or even an artificial atmosphere. Obviously, certain types of conveyors lend themselves to such special requirements better than others. 

Health Hazards Information - Recommended Personal Protective Equipment Self-contained or airline breathing apparatus solvent-resistant rubber gloves chemical splash goggles Symptoms Following Exposure Inhalation causes impairment of coordination, headache. Contact with liquid causes mild irritation of eyes and skin. Ingestion causes irritation of mouth and stomach General Treatment for Exposure INHALATION remove victim from contaminated area administer artificial respiration if necessary call physician. SKIN wipe off liquid wash well with soap and water. INGESTION induce... 

Health Hazards Information - Recommended Personal Protective Equipment Rubber gloves goggles or face shield Symptoms Following Exposure Inhalation causes irritation of nose and throat. Ingestion causes irritation of mouth and stomach. Contact with eyes or skin causes irritation General Treattnent for Exposure INHALATION remove to fresh air administer artificial respiration if needed. EYES flush with water for at least 15 min. SKIN flush with water Toxicity by Inhalation (Threshold Limit Value) Data not available Short-Term Exposure Limits Data not available Toxicity by Ingestion Data not available Late Toxicity Data not available Vapor (Gas) Irritant Characteristics Data not available Liquid or Solid Irritant Characteristics Data not available Odor Threshold Data not available. 

---