Propylene glycol is used as an antifreeze in cars and trucks.
Steer clear of anything that contains propylene glycol, sodium lauryl sulfate, sodium laureth sulfate or parabens, just to name a few of the ingredients that are often debated in the industry.
Instead, rubber RV roofs are manufactured from Ethylene Propylene Diene Monomer (EPDM), a special type of long lasting rubber made specifically for use in roofing.
All products are formulated with sustainable raw materials, and are great for folks with sensitive skin because they're paraben- and propylene glycol-free.
In addition to being aluminum free, it is also free of parabens, propylene glycol and harsh chemicals, all of which may contribute to skin irritation.
Two propylene glycols, C3H302, are known, viz.
Thus ethane gives H3C CH2 CH3, propane; ethylene gives H 2 C:CH CH 3, propylene; and acetylene gives HC: C CH 3, allylene.
In comparison with the isomeric propylene, CH 3 HC:CH 2, it is remarkably inert, being only very slowly attacked by bromine, which readily combines with propylene.
Propylene is liberated during the reaction, and the phosphoric acid ester of meta-cresol which is formed is then fused with potash.
Propylene, C 3 H 6, may be obtained by passing the vapour of trimethylene through a heated tube (S.