Loading patent…
AssigneeRohm and Haas Company
InventorsSudhir M. Mulik, William C. Finch, C. Damien Rodowski
Estimating the term…
The present invention provides modified urea formaldehyde (UF) resin binder compositions and mineral fiber mats having an emulsion polymer modifier comprising, in copolymerized form, from 5 to 25 wt. % of co polymerized carboxylic acid functional monomers. The emulsion polymers have a measured glass transition temperature (DSC) ranging from −40° C. to 70° C. and a large average particle size. Further, the emulsion polymers comprise less than 30% of the copolymerized acid in neutralized form and do not excessively thicken aqueous compositions containing them. The modified UF resin binder compositions enable good dilution stability in use and high tensile strength in products containing them.
An aqueous modified urea formaldehyde resin (UF resin) binder composition comprising from 2.5 to less than 15 wt. % of at least one emulsion polymer as modifier, based on total solids of the UF resin binder compositions, the emulsion polymer having a pH of from 4 to less than 7.0, wherein the emulsion polymer comprises, in copolymerized form, (i) one or more alkyl esters of (meth)acrylic acid, or a mixture thereof with one or more vinyl aromatic monomers, and (ii) one or more ethylenically unsaturated carboxylic acid group containing monomers, in the amount of from 5 to 25 wt. %, and, further wherein, the emulsion polymer has a measured glass transition temperature as measured by differential scanning calorimetry (DSC) ranging from −40° C. to 70° C.
Dependencies are inferred from the claim text.