Flame retardant liquid rubber composition
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsToshimoto Moriwaki, Kiyoshi Hani, Shigeru Kubota, Shohei Eto, Akira Fukami, Ichiro Yamasaki
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Abstract
A flame retardant liquid rubber composition comprises a hydrogenated polyhydroxybutadiene polymer and castor oil, which are modified with an isocyanate having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 respectively represent a lower alkyl group or hydrogen atom and n is an integer of 1 to 4, and alumina hydrate and magnesium hydroxide. The castor oil can be incorporated before adding said isocyanate or can be converted into an isocyanate prepolymer by reacting with said isocyanate before the addition.
Claims6
A flame retardant liquid rubber composition comprising:
- a hydrogenated polyhydroxybutadiene polymer and a castor oil which are modified with an isocyanate having the formula:
- ##STR4## wherein R.sub.1, R.sub.2 and R.sub.3 independently represent a lower alkyl group or hydrogen atom and n is an integer from 1 to 4,
- alumina hydrate, and
- magnesium hydroxide,
- wherein said composition comprises 100 parts by weight of said hydrogenated polyhydroxybutadiene polymer, 10 to 150 parts by weight of said castor oil, 60 to 180 parts by weight of alumina hydrate, and 5 to 60 parts by weight of magnesium hydroxide.
Dependencies are inferred from the claim text.