Glass adhesion promoter
View Patent ↗A glass adhesion composition containing a copolymer having an acid and a substituted amide, silanol, or amine oxide functionality. The substituted amide, silanol, or amine oxide functionality provide excellent adhesion of the copolymer to glass, silica, sand and other silicon-based substances. The copolymer is useful as a fiberglass binder, and also useful in providing protective coatings on glass sheets. A fiberglass sizing composition is also provided having a copolymer that includes at least one acid group derived from at least one acid monomer, a hydrophobic comonomer, and a crosslinker. Additives can be added to the compositions to provide other functionality such as corrosion inhibitors, hydrophobic additives, additives for reducing leaching of glass, release agents, acids for lowering pH, anti-oxidants/reducing agents, emulsifiers, dyes, pigments, oils, fillers, colorants, curing agents, anti-migration aids, biocides, plasticizers, waxes, anti-foaming agents, coupling agents, thermal stabilizers, flame retardants, enzymes, wetting agents, and lubricants.
1. A glass binding composition comprising a copolymer derived from a monomer mixture comprising:
about 30 to about 99.99 percent by weight of at least one acid functional monomer unit selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, 2-acrylamidomethyl propane sulfonic acid, styrene sulfonic acid, (meth)allyl sulfonic acid, (meth)allyloxybenzene sulfonic acid or mixtures thereof;
about 0.01 to about 30 percent by weight of at least one silanol monomer as a comonomer unit; and
about 0 to about 50 percent by weight of at least one ethylenically unsaturated monomer unit,
wherein the copolymer is soluble in water; and a crosslinker.
2. The glass binding composition of claim 1 wherein the copolymer has a molecular weight of from about 1,000 to about 300,000.
3. The glass binding composition of claim 1 wherein the at least one silanol monomer is selected from the group consisting of vinyl trisisopropoxy silane, vinyl trisethoxy silane, vinyl trismethoxy silane, vinyl tri(2-methoxyethoxy) silane, vinyl methyl dimethoxy silane, γ-methacryl oxypropyl trimethoxy silane, and vinyl triacetoxy silane.
4. The glass binding composition of claim 1 wherein the at least one silanol monomer is selected from the group consisting of vinyl trisisopropoxy silane, vinyl trisethoxy silane, vinyl trismethoxy silane, vinyl tri(2-methoxyethoxy) silane, vinyl methyl dimethoxy silane, and vinyl triacetoxy silane.
5. The glass binding composition of claim 1 wherein the copolymer comprises about 6.27 percent to about 50 percent by weight of at least one ethylenically unsaturated monomer unit.
6. The glass binding composition of claim 1 , further comprising a catalyst and/or accelerator.
7. The glass binding composition of claim 1 , further comprising a corrosion inhibitor.