Pentenes flash points

Methyl-1-pentene [691-37-2] is alight, colorless, flammable fiquid its physical constants are also given in Table 1. It is an irritant and, in high concentrations, a narcotic. Like 1-butene, this chemical compound has a low flash point and represents a significant fire hazard when exposed to heat, flame, or oxidizing agents. 

METHYL-l-PENTENE or 2-METHYL PENTENE-1 (763-29-1) Forms explosive mixture with air (flash point >20°F/>—7°C). Reacts violently with strong oxidizers. 

METHYL-3-PENTENE-2-ONE (141-79-7) Forms explosive mixture with air (flash point 87°F/31°C). Forms unstable peroxides in storage. Violent reaction with strong oxidizers, 2-aminoethanol, chlorosulfonic acid, 1,2-ethanediamine, ethanolaraine, nitric acid, sulfuric acid, oleum. Incompatible with strong acids aliphatic amines, alkanolamines, ethylene diamine. Dissolves some forms of plastics, resins, and rubber. Attacks copper. 

The first flammable liquid in the aUcene family is pentene. Because it is an alkene, it has a double bond in the compound. Pentene has a boiling point of 86°F, a flash point of 0°F, a flammable range of 1.5 to 8.7%, and an ignition temperature of 527°F. The structure and formula for pentene is shown in Figure 5.35. 

It is known that TPX has a higher melting point than either PE or PP (235°C - versus 140°C and 165°C, respectively) and as such can provide a flash spun product usable at higher temperatures. Rather the copolymers with around 85% 4-methyl-l-pentene are in use than the pure homopolymer. In addition, it can be blended with either PE or PP or both. 

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