Coating processes – With post-treatment of coating or coating material – Heating or drying
Reexamination Certificate
2002-04-15
2003-09-09
Cameron, Erma (Department: 1762)
Coating processes
With post-treatment of coating or coating material
Heating or drying
C427S393200, C427S394000
Reexamination Certificate
active
06616980
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the use of an emulsion polymerized acrylated polyether modified polydimethylsiloxane as a wrinkle reducing additive for aqueous and non-aqueous based formulations useful for fabric care applications. More specifically, these acrylated silicones form a stable silicone-in-water emulsion that contains a highly cross-linked matrix, which, when spray applied to fabric substrates, releases wrinkles and deposits a continuous film. This film, upon drying, prevents wrinkles from reforming and improves tactile properties.
2. Description of Related Art
Emulsions of polymers derived from hydrophilic acrylated siloxanes offer important properties, such as hydrophilicity and rewettability, while maintaining other “silicone” characteristics, such as improved aesthetics and tactile properties.
U.S. Pat. No. 3,714,287 discloses that the removal of stains during laundering of organic textiles is facilitated and superior hand is imparted in the fabric by applying thereto a combination of from 10 to 99 percent by weight of a polymethylsiloxane and from 1 to 90 percent by weight of a polymeric, unsaturated, water-soluble carboxylic acid. This composition is said to work especially well in combination with aminoplast crease resistance textile resins. A typical formulation is 45 percent by weight of dihydroxyl dimethylolethylene urea resin, 27.5 percent by weight of a polydimethylsiloxane of 50,000 cs. viscosity and 27.5 percent by weight of polymethacrylic acid.
U.S. Pat. No. 4,153,640 discloses a process for the production of modified polymers, preferably in organic solvents, by radical-initiated polymerization of (Ia) 70 to 99.9 parts by weight of esters of the formula CH
2
═C(R)—COOR′(Ia) in which R is —H or —CH
3
and R′ are 1 to 18 C-alkyl radicals, at least 50% by weight of the esters of (Ia) being those in which R′ are 1 to 4 C-alkyl radicals, (Ib) 0.1 to 20 parts by weight of &ohgr;-hydroxyalkyl esters of acrylic, methacrylic, maleic and/or fumaric esters, the said dicarboxylic acids are possibly etherified on the second carboxylic group with 1 to 12 C-atoms containing alcohols and (Ic) 0 to 10 parts by weight of other unsaturated monomers, the sum of (Ia), (Ib) and (Ic) amounting to 100 parts by weight, in the presence of (II) 5 to 40 parts by weight of terminal blocked alkyl-hydrogen polysiloxanes, the alkyl radicals containing 1 to 4 carbon atoms, with a viscosity of 20 to 1000 cP at 20° C., the ratio of alkyl radicals to hydrogen atoms thereof being from 13:1 to 1:1, in which ratios the terminal groups are not included. Organic solvents containing the obtained modified polymers and usual curing agents for alkyl-hydrogen polysiloxanes are said to be useful for treating fibrous material to give water-tight and water-repellent effects.
U.S. Pat. No. 4,464,506 discloses a graft polymer dispersion suitable for finishing textiles and comprising water, a dispersing auxiliary and a polymeric product produced by subjecting to free radical polymerization a composition comprising
(A) an organopolysiloxane containing vinyl groups,
(B) an organopolysiloxane containing Si—H groups, and
(C) a polymerizable vinyl monomer, some of the organopolysiloxane components being linked via polymerized units of the vinyl monomer and some of the Si—H groups of the Si—H-organopolysiloxane being modified by mono-addition of the vinyl monomer.
U.S. Pat. No. 4,987,180 discloses that softness and elastic resilience can be imparted to a fabric material treated with a fabric finishing agent that is an aqueous emulsion of a copolymer obtained by the emulsion polymerization, in an aqueous emulsion of an organopolysiloxane having radical-polymerizable groups, e.g., vinyl groups, or mercapto-substituted hydrocarbon groups, e.g., 3-mercaptopropyl groups, as the polymerization medium of an acrylic or methacrylic monomer, e.g., alkyl acrylates and methacrylates, in a specified amount relative to the amount of the organopolysiloxane. The acrylic or methacrylic monomer may be partly replaced with a polyfunctional monomer, e.g., acrylic and methacrylic acids, N-methylol acrylamide, glycidyl methacrylate, 2-hydroxyethyl methacrylate and the like, and/or a monomer of the third class, e.g., styrene and acrylonitrile. The emulsion may be further admixed with an organohydrogen polysiloxane as a crosslinking agent and a catalyst for the crosslinking reaction.
U.S. Pat. No. 5,084,489 discloses a silicone emulsion prepared by emulsion polymerizing a hydroxyl endblocked polydiorganosiloxane oligomer with a combination of a siloxane or siloxane precursor containing unsaturated hydrocarbon groups and a functional silicone selected from the group consisting of organosilicon hydrides and mercaptoalkylsilanes or siloxanes, or with an acryl or methacryl functional siloxane. When the emulsion of the copolymer produced is combined with a photoinitiator, the copolymer can be crosslinked by exposure to ultraviolet radiation. When the water is removed, an elastomer results. The emulsion can be used to produce coatings and sealants.
U.S. Pat. No. 5,171,638 discloses an organopolysiloxane/acrylate ester copolymer emulsion composition prepared by forming a water-based emulsion of an alkenyl-containing organopolysiloxane containing no more than 5,000 parts per million of organosiloxane oligomer which has ≦20 silicon atoms in its molecule and copolymerizing the emulsion with an acrylate ester monomer.
U.S. Pat. No. 5,300,237 discloses reacting amino groups of an organopolysiloxane with an acrylic acid or ester compound to provide a fiber-treating composition that is said to be almost completely free of yellowing while having excellent softness and smoothness.
U.S. Pat. No. 5,300,241 discloses a polyester-fiber-treatment agent that can impart smoothness and flexibility to polyester fiber at the same time that it also equips the polyester fiber with nonflammability. The treatment agent for the polyester fiber is based on an organosilicon compound that contains an organic group comprising a bromine-containing organic group bonded to silicon via carbon where the organosilicon compound has a bromine content of at least 5 weight percent.
U.S. Pat. Nos. 5,532,023 and 5,798,107 disclose a wrinkle reducing composition for use on fabrics, particularly clothing. The composition comprises a wrinkle reducing active, which is made up of an effective amount of silicone and an effective amount of film-forming polymer, and a liquid carrier. The composition is substantially free of starch, modified starch, and mixtures thereof, and results in a Loss Modulus Difference of greater than about 3.3×10
7
Pascal on fabric. The composition can be incorporated into a spray dispenser that can create an article of manufacture that can facilitate treatment of fabric with the wrinkle reducing composition. The wrinkle reducing actives in the composition can be determined through Dynamic Mechanical Analysis using a 100% cotton broadcloth swatch and a fixed volume of a sample of wrinkle reducing active.
U.S. Pat. No. 5,612,433 describes a water repellent for fibers, comprising an acrylsilicone graft copolymer that is prepared by a radical copolymerization reaction of an organopolysiloxane compound containing one radical polymerizable group with radical polymerizable monomers including an acrylate, a methacrylate or a mixture thereof as a main member.
Acrylated polysiloxanes copolymerized with organic acrylates and emulsions thereof are known wherein the siloxane and acrylate have been applied to a substrate and are polymerized directly onto a surface. For example, U.S. Pat. No. 5,635,546 discloses a curable composition, having utility for threadlocking engageable members of a threaded mechanical fastener, comprising: a reactive silicone (meth)acrylate emulsified in an aqueous medium, optionally further comprising a polymerizable non-silicone (meth)acrylate monomer or oligomer; and a microencapsulated peroxy initiator which is initiatingly effective for cure of the react
Silvestre Emie M.
Tully Jo Anne
Cameron Erma
Crompton Corporation
Dilworth Michael P.
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