Emulsion polymer binder with azirdine crosslinking agent for glass fiber webs
OwnerJoel E. Goldstein, Hendrikus van Boxtel +1inventors
InventorsJoel E. Goldstein, Hendrikus van Boxtel, Steven P. Pauls
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Abstract
A binder composition for glass fiber mats or the like, where the binder composition includes a carboxylated emulsion resin and a polyfunctional aziridine crosslinking agent. The binder composition is formaldehyde free, exhibits good crosslinking density, and enables the economical production of strong, flexible fiberglass mats which may be used as thermal and acoustic insulation.
Claims32
An aqueous binder composition for glass fiber webs, wherein said binder composition includes:
- a) an emulsion polymer having from 0.05 to 50 weight percent of carboxylic acid monomer units based on the total monomer weight, wherein the emulsion polymer has a glass transition temperature of at least 20° C.;
- b) a polyfunctional aziridine crosslinking agent;
- and
- c) water.
An aqueous binder composition for glass fiber webs, wherein the binder composition comprises a mixture of:
- a) a synthetic emulsion polymer that includes from 0.05 to 50 weight percent of carboxylic acid monomer units based on the total monomer weight, wherein said emulsion polymer is substantially free of polyvinyl alcohol protective colloids;
- b) a polyfunctional aziridine crosslinking agent;
- and
- c) water.
An aqueous binder composition for glass fiber webs, wherein the binder composition comprises:
- a) a surfactant-stabilized emulsion polymer which includes at least 50 percent of vinyl acetate monomer units and from 0.1 to 50 weight percent of carboxylic acid monomer units based on the total monomer weight, and
- wherein the emulsion polymer has a glass transition temperature in the range of from 30° C. to 100° C.;
- b) a polyfunctional aziridine crosslinking agent;
- and
- c) water.
A binder composition for glass fiber mats, wherein the binder composition comprises the reaction product of:
- a) a polymer which includes from 0.1 to 50 weight percent of carboxylic acid monomer units based on the total monomer weight, where the polymer has a glass transition temperature of at least 20° C.;
- and
- b) from 0.1 to 10 pphr of a polyfunctional aziridine crosslinking agent.
A method for producing a fiberglass mat bonded with polymeric binder, said method including the steps of:
- a) forming a web of glass fibers;
- b) applying an aqueous binder composition to the glass fiber web, where the aqueous binder composition has a pH in the range of from 6 to 9 and includes
- i) an emulsion polymerized synthetic resin having carboxylic acid monomer units, and
- ii) a polyfunctional aziridine crosslinking agent,
- and
- c) subsequently drying the glass fiber web to cure the binder composition.
Dependencies are inferred from the claim text.