Peroxide dispersions
AssigneeArkema Inc.
InventorsThomas H. Kozel, Joseph M. Gravelle, Timothy Belford, Tomas Salvador
Life of this patent
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Abstract
The viscosity of aqueous dispersions of normally solid organic peroxides may be advantageously lowered through the use of surfactants which are polyglyceryl esters of C6-C12 fatty acids. The reduction in viscosity facilitates milling the peroxides to reduce particle size and also provides dispersions of small particle size peroxides which may be readily poured or pumped.
Claims12
An aqueous pumpable or pourable dispersion comprising a) about 35% by weight or more of water-insoluble, solid benzoyl peroxide having an average particle size of less than 5 μm and b) 0.1 to 2.0 weight percent of surfactant having an HLB value of 12 to 18 and which is a polyglyceryl ester of one or more saturated C6-C18 fatty acids selected from the group consisting of octanoic acid, decanoic acid, and mixtures thereof.
An aqueous pumpable or pourable dispersion comprising:
- g) 37.5 to 42 weight % benzoyl peroxide having an average particle size of less than 5 μm;
- h) 53.5 to 62 weight % water;
- i) 0.25 to 1.5 weight % gelling agent;
- j) 0.1 to 2.0 weight % of surfactant selected from the group consisting of polyglyceryl-10 caprylate/caprate, polyglyceryl-10 caprylate, and polyglyceryl-10 laurate, and mixtures thereof;
- k) 0.01 to 0.05 weight % crosslinking agent;
- and
- l) 0.25 to 1.0 weight % base.
Dependencies are inferred from the claim text.