Hydrous gel
AssigneeKuraray Co., Ltd.
InventorsShobu Minatono, Hideo Takamatsu
Life of this patent
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Abstract
A hydrous gel consisting essentially of a water-in-oil dispersion cured with a crosslinking agent. The dispersion comprises a rubber component in which water is dispersed in the form of droplets in the presence of a surfactant. The rubber component is based on a liquid polyisoprene rubber having a cis-1,4 content of not less than 70% and a molecular weight of 8,000 to 120,000 or a modified polyisoprene rubber which is an adduct of the above-mentioned liquid polyisoprene rubber and maleic anhydride or a derivative thereof. The hydrous gel provides cold- and heat-retaining materials, perfume-retaining materials, adhesives for medical use, poultices and shock-absorbing materials.
Claims13
A hydrous gel consisting essentially of a water-in-oil dispersion cured with a crosslinking agent, said dispersion comprising a rubber component in which water is dispersed in the form of droplets in the presence of a surfactant, said rubber component being selected from the group consisting of liquid polyisoprene rubber having a cis-1,4 content of not less than 70% and a molecular weight of 8,000 to 120,000, and modified liquid polyisoprene rubber which is an adduct of said liquid polyisoprene rubber and maleic anhydride or a derivative thereof.
A hydrous gel prepared by crosslinking a water-in-oil dispersion, said water-in-oil dispersion prepared by mixing a rubber component based on a liquid polyisoprene rubber or modified liquid polyisoprene rubber, a surfactant and a crosslinking agent, adding water and effectng emulsification, said rubber component being selected from the group consisting of liquid polyisoprene rubber having a cis-1,4 content of not less than 70% and a molecular weight of 8,000 to 120,000 and modified liquid polyisoprene rubber which is an adduct of said liquid polyisoprene rubber and maleic anhydride or a derivative thereof.
A hydrous gel prepared by crosslinking a water-in-oil dispersion prepared by mixing a rubber component based on a liquid polyisoprene rubber or modified liquid polyisoprene rubber and a cross-linking agent, adding the resulting mixture to an aqueous phase containing a surfactant and effecting emulsification, said rubber component being selected from the group consisting of liquid polyisoprene rubber having a cis-1,4 content of not less than 70% and a molecular weight of 8,000 to 120,000 and modified liquid polyisoprene rubber which is an adduct of said liquid polyisoprene rubber and maleic anhydride or a derivative thereof.
Dependencies are inferred from the claim text.