Basf Corporation

Adriana E Ticu

Christopher J Bradford

Glenn E Martin

David J Oberg

Richard E De Schepper

Brian J Bugg

In a process for crosslinking a polymer, a .beta.-dicarbonyl functionality is present as a reactive diluent and/or as a reactive solvent and/or on a crosslinking entity. The .beta.-difunctional compound reacts with formaldehyde which is either released during the crosslinking reaction (or otherwise present) whereby less formaldehyde is released, than would otherwise be released. The formaldehyde which reacts with the .beta.-dicarbonyl compound is either incorporated into the crosslinked polymer network or released in the form of a reaction product which is not as harmful to the environment as the unreacted formaldehyde. The process enables the reduction of formaldehyde release during crosslinking to levels otherwise unobtainable. Furthermore, the process enables a reduction in the amount of organic solvent utilized.

Process for producing a crosslinked polymer using a .beta.-dicarbonyl

According to the present invention, a .beta.-dicarbonyl functionality, an .alpha.,.beta.-unsaturation functionality, or a vinylogous amide functionality is incorporated into an aminoplast resin or an aminoplast resin precursor.

Aminoplast resin or aminoplast resin precursor

A sealant primer composition useful for promoting the adherence of non-porous materials to enamel paint coated substrates comprises (1) an acrylic polymer base composition comprising the reaction product of 2-sulfoethyl methacrylate and lower alkyl esters of methacrylic acid, (2) a pigmenting agent, and (3) a solvent effective to interpenetrate the enamel substrate coating.

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Livonia, MI, United States of America

Adriana E Ticu