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US 5,855,623 AGranted
Process for improving polyamide, acrylic, aramid, cellulosic and polyester properties, and modified polymers produced thereby
AssigneeIntera Technologies, Inc.
InventorsLarry L. English, Ted A. Mallen
Life of this patent
Estimating the term…
Abstract
Methods are provided for treating polyester, polyamide, acrylic, aramid or cellulosic substrates to improve the uniformity of dyeing and to improve the hydrophilic, soil-release, odor-, mildew-, bacterial- and fungal- resistant properties of these substrates.
Claims37
A process, comprising the steps of:
- (a) contacting a polyester substrate with an aqueous monomer or monomer mixture;
- (b) slowly adding a polymerization initiator to said contacted polyester substrate over a time period of greater than 3 minutes, wherein said contacted polyester substrate is heated to a temperature suitable for polymerization;
- (c) polymerizing said monomers on said contacted polyester substrate to form a surface modified polyester substrate.
A process, comprising the steps of:
- (a) mixing separate aqueous solutions of a water-soluble polymerizable monomer, a hydrophobic polymerizable monomer, an acid and a polymerization initiator to form a mixture;
- (b) contacting a polyester substrate with said mixture to form a contacted polyester substrate;
- and
- (c) heating said contacted polyester substrate in saturated steam at a temperature of about 98.degree.-100.degree. C. for a time sufficient to polymerize said monomer mixture on said polyester substrate to form a surface modified polyester substrate.
1 more element
A process, comprising the steps of:
- (a) contacting a polyester substrate with an aqueous solution containing a dye, a portion of a water-soluble polymerizable monomer at a pH of about 4-6 and at a temperature of about 120.degree.-135.degree. C. to form a contacted polyester substrate in a dye bath;
- (b) adding additional water-soluble polymerizable monomer to said dye bath;
- (c) lowering the pH of said dye bath to a pH in the range of about 2-4;
- (d) slowing adding a polymerization initiator to said dye bath over a time period of greater than 3 minutes;
- and
- (e) polymerizing said water-soluble polymerizable monomer on said contacted polyester substrate to form a surface modified polyester substrate.
3 more elements
A process, comprising the steps of:
- (a) contacting a polyamide, acrylic, aramid or cellulosic substrate with an acidic aqueous solution containing an unsaturated water-soluble polymerizable monomer to form a contacted substrate;
- (b) slowly adding a polymerization initiator to said contacted substrate over a time period of greater than 3 minutes, wherein said contacted substrate is heated to a temperature suitable for polymerization;
- (c) polymerizing said water-soluble polymerizable monomer on said substrate to form a surface modified substrate.
A process, comprising the steps of:
- (a) contacting a polyamide, acrylic, aramid or cellulosic substrate with an acidic aqueous solution containing a water-soluble polymerizable monomer;
- (b) adding a dye to said aqueous solution containing said water-soluble monomer and heating said solution at a temperature and time sufficient to dye said substrate;
- (c) lowering the pH of said solution to a pH of about 2-4;
- (d) slowly adding a polymerization initiator to said solution over a time period of greater than 3 minutes;
- and
- (e) polymerizing said water-soluble polymerizable monomer on said substrate to form a dyed and surface modified substrate.
3 more elements
A process, comprising the steps of:
- (a) mixing separate aqueous solutions of a water-soluble polymerizable monomer, an acid and a polymerization initiator to form a mixture;
- (b) contacting a polyamide, acrylic, aramid or cellulosic substrate with said mixture to form a contacted substrate;
- and
- (c) heating said contacted substrate in saturated steam at a temperature of about 98.degree.-100.degree. C. for a time sufficient to polymerize said water-soluble polymerizable monomer on said substrate to form a surface modified substrate.
1 more element
A method of improving the uniformity of dyeing, hydrophilic, soil-release, odor-resistant, mildew-resistant, bacterial-resistant or fungal-resistant properties of a polyester, polyamide, acrylic, aramid or cellulosic substrate, comprising the steps of:
- (a) contacting a polyester, polyamide, acrylic, aramid or cellulosic substrate with an aqueous monomer or monomer mixture;
- (b) slowly adding a polymerization initiator to said contacted substrate over a time period of greater than 3 minutes, wherein said contacted substrate is heated to a temperature suitable for polymerization;
- (c) polymerizing said monomers on said contacted substrate to form a surface modified substrate.
Dependencies are inferred from the claim text.