Precipitation polymerization process for producing an oil adsorbent polymer capable of entrapping solid particles and liquids and the product thereof
AssigneeAMCOL International Corporation
InventorMilan F. Sojka
Life of this patent
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Abstract
A process for producing a microporous oil sorbent polymer comprising the steps of: dissolving a polyunsaturated monomer in a silicone organic solvent to provide a monomer mixture containing more than 90% by weight polyunsaturated monomer; polymerizing said monomers by precipitation polymerization, under an inert atmosphere to precipitate microporous, micro-particles in the form of micro-particles, agglomerates and aggregates having a bulk density of about 0.02 gm/cm3 to about 0.01 gm/cm3 and capable of adsorbing at least about 20% by weight organic materials based on the total weight of polymer plus adsorbed organic material.
Claims16
A dry powder comprising:
- (a) up to 78.3% by weight salicylic acid, and
- (b) a micro-particle comprising a polymer of allyl methacrylate and an ethylene glycol dimethacrylate, in a mole ratio of about 1:1 to about 1:2, said particle characterized by having a mean unit diameter of less than about 80 microns, a bulk density of about 0.02 to about 0.07 g/cm3.
A dry powder comprising:
- (a) up to 50% by weight dibenzoyl peroxide, and
- (b) a micro-particle comprising a polymer of allyl methacrylate and an ethylene glycol dimethacrylate, in a mole ratio of about 1:1 to about 1:2, said particle characterized by having a mean unit diameter of less than about 80 microns, a bulk density of about 0.02 to about 0.07 g/cm3.
A dry, free-flowing powder comprising:
- (a) up to 73% by weight retinol, and
- (b) a micro-particle comprising a polymer of allyl methacrylate and an ethylene glycol dimethacrylate, in a mole ratio of about 1:1 to about 1:2, said particle characterized by having a mean unit diameter of less than about 80 microns, a bulk density of about 0.02 to about 0.07 g/cm3.
A dry, free-flowing powder comprising:
- (a) up to about 92% by weight of an oleophilic material, and
- (b) a micro-particle comprising a polymer of allyl methacrylate and an ethylene glycol dimethacrylate, in a mole ratio of about 1:1 to about 1:2, said particle characterized by having a mean unit diameter of less than about 80 microns, a bulk density of about 0.02 to about 0.07 g/cm3.
Dependencies are inferred from the claim text.