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US 4,476,262 AGranted
Aqueous coatings comprising ionic polymer ester and diluent polymer with reduced monomer residue and method of preparation
AssigneeMobil Oil Corporation
InventorsShaw C. Chu, Arthur T. Spencer
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Abstract
A method for reducing extractable constituents of an undesirable monomer in compositions which comprise an ionic polymer and an addition polymer of the undesired monomer which comprises conducting an addition polymerization in the presence of the undesired monomer with another monomer which is copolymerizable therewith and which results in a less undesirable residue or a residue which is more easily removable, is disclosed.
Claims18
A process for preparing an aqueous dispersion composition containing reduced extractable constituents which composition includes
- A. an ionic polymer component derived from an aromatic epoxy resin containing 1,2-epoxy groups which has been reacted to render it self-dispersible in water;
- B. a first addition polymer of a first monomer;
- in which the addition polymerization of said first polymer results in an undesirable residue of first monomer;
- the improvement comprising reducing the residue of said first monomer by conducting an additional in situ polymerization step, in the presence of an aqueous dispersion of said first addition polymer containing residual first monomer, with a second monomer which is capable of copolymerizing with said first monomer and which results in a less undesirable monomer residue or a residue which is more easily removable than said first monomer.
1 more element
Dependencies are inferred from the claim text.