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. An aqueous process for producing hydrophobic solution copolymers comprising the steps of:
adding an acid functional monomer and a hydrophobic monomer to an aqueous solution;
adding an initiating agent to effect polymerization of the monomers;
adding a chain transfer agent to the aqueous solution; adding maleic acid, sodium methallyl sulfonate or combinations thereof; and
polymerizing the monomers thereby forming hydrophobic solution copolymers in the aqueous solution.
2. The aqueous process of claim 1 wherein polymerization occurs at a temperature of about 90° C. or greater.
3. The process of claim 1 further comprising the step of adding a silanol or amine oxide functional-monomer prior to the polymerization.
4. The process of claim 3 wherein the silanol functional-monomer is selected from the group consisting of vinyl trisisopropoxy silane, vinyl trisethoxy silane, vinyl trismethoxy silane, γ-methacryl oxypropyl trimethoxy silane, and vinyl triacetoxy silane.
5. The process of claim 3 wherein the a silanol functional-monomer is selected from the group consisting of vinyl trisisopropoxy silane, vinyl trisethoxy silane, vinyl trismethoxy silane, and vinyl triacetoxy silane.