US 5,238,749 A · Antimicrobial coating process and product

Abstract

An improved antimicrobial coated product and a method for coating substrates, the product of which is capable of withstanding high impact, is not subject to corrosion, is resistant to germ retention and transfer, and thus is extremely well suited for the containment of toxic, hazardous, corrosive, and bacteria-laden wastes as well as for products which are resistant to attack from fungus, positive and negative bacteria, yeast infections and contaminations, and viruses, as well as resistant to attack from corrosion, corrosive chemicals, caustic chemicals, and radiation. The substrate is coated with a thermoplastic material incorporating an antimicrobial agent by electrostatic, fluidized bed or flame spraying techniques. Alternatively, the substrate may be coated with a combination of a thermosetting resin and a thermoplastic material, either or both incorporating an antimicrobial agent, all of which can be cured in place.

Claims8

Dependent claims

An antimicrobial laminated article, comprising:

a substrate selected from the group consisting of non-ferrous and ferrous metals, glass, porcelain, concrete, refractory and other high silica materials, plastics and thermoplastics;
a coating of thermoplastic material containing an effective antimicrobial amount of 5-chloro-2,4 dichloro-phenoxy) phenol which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4-dichloro-phenoxy) phenol within said coating demands equalization;
said coating material being bonded to said substrate, and having a high degree of impermeability.

An antimicrobial coated product made by the process of, sequentially:

selecting a substrate that will hold an electrostatic charge;
preparing the surface of the substrate;
grounding the substrate;
electrostatically applying a layer of a positively charged, uncured, powdered thermoplastic material containing an effective antimicrobial amount of an antimicrobial biocidal or biostatic substance which maintains its biocidal properties above 300.degree. F. and migrates through the thermoplastic material to the surface of the thermoplastic on demand to said substrate by electrostatic methods;
the antimicrobial biocidal or biostatic substance being selected from the group consisting of 5-chloro-2-(2,4dichlorophenoxy) phenol and polyhexamethylene biguanide hydrochloride which exhibits controlled migration through said coating to said substrate surface when an imbalance of vapor pressure of said 5-chloro-2-(2,4 dichloro-phenoxy) phenol within said coating demands equalization;
and
thereafter heating the substrate and said coating to a temperature of from 355.degree. to 430.degree. F. and holding the temperature for a period of from 5 to 22 minutes;
whereby said coating materials become cured and bonded to the substrate, and develop a high degree of impermeability.

5 more elements

Dependencies are inferred from the claim text.

Antimicrobial coating process and product

Life of this patent

Antimicrobial coating process and product

Life of this patent

Abstract

Claims8