Polysulphide sealants
OwnerAndrew J. Marsh, Terence F. Watkinsinventors
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Abstract
A hardener for a polysulphide sealant comprises an inorganic peroxide and according to the invention includes as a cure control agent a naphthenate e.g. copper naphthenate and/or a phenolic compound e.g. cresylic acid.
Claims10
A hardener composition for reaction with a polysulphide base to form a sealant, the hardener composition comprising an inorganic peroxide and a cure control agent for controlling the rate of cure, in which the cure control agent is selected from the group of a cure accelerator or a cure retarder or both, and the cure accelerator is a metal salt of napthenate, and the cure retarder is a phenolic compound.
A composition according to any preceding claim, in which the inorganic peroxide in the hardener composition is lead peroxide.
A method of making a sealant having an extended pot life comprising mixture together a polysulphide base and a hardener composition therefor, the hardener composition comprising an inorganic peroxide and a cure control agent for controlling the rate of cure of the base and hardener, in which the cure control agent is selected from the group consisting of a cure accelerator and a cure retarder or both, and the cure accelerator is a metal salt of a naphthenate and the cure retarder is a phenolic compound.
In the art of controlling the rate of cure of a polysulphide base and a hardener therefor, the hardener comprising an inorganic peroxide, the improvement which consists in extending the pot life of the mixture of base and hardener by including in the hardener composition a cure control agent selected from the group consisting of a cure accelerator and a cure retarder or both, and the cure accelerator is a metal salt of a naphthenate and the cure retarder is a phenolic compound.
Dependencies are inferred from the claim text.