Absorption of additivies into polymer surfaces from solution
AssigneeGeneral Electric Company
InventorGim F. Lee, Jr.
Life of this patent
Estimating the term…
Abstract
Polymeric articles or non-polymeric articles having polymeric coatings are treated to incorporate an additive in the surface by a process comprising contacting the surface with a solution of the additive in a mixture of two or more solvents of different solvating power and selectively absorbing the additive into the surface.
Claims24
A process for incorporating an additive into the polymeric surface of a molded article comprising a polyphenylelne ether resin product, comprising the steps of:
- (a) contacting said article having at least one said polymeric surface with a solution of an additive dissolved in a miscible blend of two or more liquids, at least one of which is a solvent for the polyphenylene ether resin product and additive and at least oen of which is a nonsolvent or poorer solvent for the polyphenylene ether resin and additive;
- (b) continuing the contact for a period of time sufficient for the polyphenylene ether resin product surface to absorb an effective amount of the additive;
- and
- (c) drying the liquid from the polymer surface to obtain an article having the additive incorporated in the surface, wherein the additive is selected from among light stabilizers, heat stabilizers, antioxidants, colorants, antistatics agents, flame retardant agents, smoke suppressants, foaming agents, electrical conductivity additives, lubricants, and resistants and wherein the at least one solvent for the polyphenylene ether resin product has a boiling point which is lwoer than that of the at least one nonsolvent or poorer solvent for the polyphenylene ether resin and additive.
A process for incorporating an additive into the polymeric surface of an article, comprising
- (a) contacting an article having at least one polymeric surface with a solution of an additive dissolved in a miscible blend of two or more liquids, at least one of which is a solvent for the polymer and additive, and at least one of which is a nonsolvent or poorer solvent;
- (b) continuing the contact for a period of time sufficient for the polymer surface to absorb an effective amount of the additive;
- and
- (c) drying the liquid from the polymer surface to obtain an article having the additive incorporated in the surface, wherein the at least one solvent for the polymer and additive has a higher evaporation rate than that of the at least one nonsolvent or poorer solvent.
A process for incorporating an additive into the polymeric surface of a molded article comprising a polyphenylene ether resin product, comprising the steps of:
- (a) contacting said article having at least one said polymeric surface with a solution of an additive dissolved in a miscible blend of two or more liquids, at least one of which is a solvent for the polyphenylene ether resin product and additive, and at least one of which is a nonsolvent or poorer solvent for the polyphenylene ether resin and additive;
- (b) continuing the contact for a period of time sufficient for the polyphenylene ether resin product surface to absorb an effective amount of the additive;
- and
- (c) drying the liquid from the polymer surface to obtain an article having the additive incorporated in the surface, wherein the additive is selected from among light stabilizers, heat stabilizers, antioxidants, colorants, antistatics agents, flame retardant agents, smoke suppressants, foaming agents, electrical conductivity additives, lubricants, and resistants and wherein the at least one solvent for the polyphenylene ether resin product has an evaporation rate which is higher than that of the at least one nonsolvent or poorer solvent for the polyphenylene ether resin and additive.
A process for incorporating an additive inot the polymeric surface of an article, comprising
- (a) contacting an article having at least one polymeric surface with a solution of an additive dissolved in a miscible blend of two or more liquids, at least one of which is a solvent for the polymer and additive, and at least one of which is a nonsolvent or poorer solvent;
- (b) continuing the contact for a period of time sufficient for the polymer surface to absorb an effective amount of the additive;
- and
- (c) drying the liquid from the polymer surface to obtain an article having the additive incorporated in the surface, wherein the at least one solvent for the polymer and additive has a lower boiling point than that of the at least one nonsolvent or poorer solvent for the polymer.
Dependencies are inferred from the claim text.