Low viscosity, fast curing binder for cellulose
AssigneeRohn and Haas Company
InventorDennis P. Stack
Life of this patent
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Abstract
Low viscosity, fast curing binders for nonwoven cellulosic materials comprise an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer resulting from the copolymerization of a water insoluble olefinic non-ionic organic compound, a water soluble olefinic carboxylate compound and a water soluble olefinic hydroxy ester or a water soluble olefinic amide or a mixture of hydroxy ester and amide. The emulsion copolymer dispersion is admixed with a latex to provide a binder having a relatively low viscosity and capable of reaching about 80 percent of fully cured wet tensile strength in 8 seconds or less.
Claims64
A fast curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the compolymerization of a mixture of comonomers comprising;
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group therein;
- and
- (3) one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters or water soluble olefinically unsaturated amides or a mixture thereof;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast-curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising:
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds having the general formula:
- ##STR9## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from hydrogen, halogen, nitro, amino and organic radicals;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group, said compounds having the general formula:
- ##STR10## wherein R.sub.5, R.sub.6, and R.sub.7 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- R.sub.8 is hydrogen or an organic radicals;
- and X is an organic radical or a covalent bond;
- and
- (3) a member selected from the group consisting of one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters of the general formula:
- ##STR11## wherein R.sub.9, R.sub.10 and R.sub.11 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- and R.sub.12 is an organic radical having at least 2 carbon atoms, with at least one of R.sub.9, R.sub.10, R.sub.11 and R.sub.12 being an organic radical containing a hydroxyl substituent, said hydroxyl substituent being located on a carbon atom which is at least 2 carbon atoms away from the carboxylate group;
- and Y is an organic radical or a covalent bond;
- and one or more water soluble olefinically unsaturated amides having the general formula:
- ##STR12## wherein R.sub.13, R.sub.14 and R.sub.15 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- R.sub.16 and R.sub.17 are hydrogen or organic radicals;
- and Z is an organic radical or a covalent bond;
- and a mixture of said one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters and said one or more water soluble olefinically unsaturated amides;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex to produce said binder, the latex being selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising;
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group therein;
- and
- (3) one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising;
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group therein;
- and
- (3) one or more water soluble olefinically unsaturated amides;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast-curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising:
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds having the general formula:
- ##STR17## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from hydrogen, halogen, nitro, amino and organic radicals;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group, said compounds having the general formula:
- ##STR18## wherein R.sub.5, R.sub.6, and R.sub.7 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- R.sub.8 is hydrogen or an organic radical;
- and X is an organic radical or a covalent bond;
- and
- (3) one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters of the general formula:
- ##STR19## wherein R.sub.9, R.sub.10 and R.sub.11 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- and R.sub.12 is an organic radical having at least 2 carbon atoms, with at least one of R.sub.9 R.sub.10, R.sub.11 and R.sub.12 being an organic radical containing a hydroxyl substituent, said hydroxyl substituent being located on a carbon atom which is at least 2 carbon atoms away from the carboxylate group;
- and Y is an organic radical or a covalent bond;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex to produce said binder, the latex being selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast-curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising:
- (1) one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds having the general formula:
- ##STR20## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from hydrogen, halogen, nitro, amino and organic radicals;
- (2) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group, said compounds having the general formula:
- ##STR21## wherein R.sub.5, R.sub.6, and R.sub.7 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- R.sub.8 is hydrogen or an organic radical;
- and X is an organic radical or a covalent bond;
- and
- (3) one or more water soluble olefinically unsaturated amides having the general formula:
- ##STR22## wherein R.sub.13, R.sub.14 and R.sub.15 are independently selected from hydrogen, halogen, nitro, amino, and organic radicals;
- R.sub.16 and R.sub.17 are hydrogen or organic radicals;
- and Z is an organic radical or a covalent bond;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex to produce said binder, the latex being selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
A fast-curing binder for nonwoven cellulosic materials, said binder comprising an aqueous dispersion of discrete particles of a highly functionalized emulsion copolymer formed by the copolymerization of a mixture of comonomers comprising:
- and 10 phm to about 60 phm of one or more water insoluble polymerizable olefinically unsaturated non-ionic organic compounds;
- the balance of said mixture of comonomers comprising a mixture of
- (a) one or more water soluble olefinically unsaturated organic compounds having at least one carboxylate group therein;
- and
- (b) one or more water soluble olefinically unsaturated carboxylic acid hydroxy esters or one or more water soluble olefinically unsaturated amides or a mixture thereof;
- said aqueous dispersion of discrete particles of highly functionalized emulsion copolymer being admixed with a latex to produce said binder, the latex being selected from the group consisting of styrene-butadiene resin (SBR) copolymer latexes, vinyl acetate/acrylate copolymer latexes, and all-acrylate copolymer latexes.
Dependencies are inferred from the claim text.