Abstract:
The invention provides curable coating compositions comprising an aqueous dispersion comprising a stabilizing resin (P1) and a compound (P2) comprising functional groups reactable with a crosslinking agent. Compound (P2) is dispersed into stabilizing resin (P1). The coating compositions of the invention may further comprise an optional crosslinking agent (P3) which may or may not be dispersed into stabilizing resin (P1). In a particularly preferred embodiment, both the stabilizing resin (P1) and compound (P2) will comprise functional groups which are carbamate or are convertible to carbamate.
Abstract:
The invention provides curable waterborne coating compositions comprising an aqueous dispersion (A) comprising an organic binder component (A1) comprising at least 5% by weight of a reactive component (a), based on the total weight of organic binder component (A1), and at least one crosslinking component (B). The reactive component (a) is substantially free of any heteratoms and is a not a crystalline solid at room temperature and comprises from (i) 12 to 72 carbon atoms, and (ii) at least two functional groups. The curable waterborne coating compositions of the invention show significantly improved pop resistance while also providing improved chip resistance, weathering resistance, flexibility, and/or scratch & mar resistance.
Abstract:
The curable coating compositions of the invention comprise a particulate component having at least one binder component (a) which is a solid at 75 DEG F/24 DEG C, and an additive component (b). The curable coating compositions further comprise a crosslinking component (c) reactive with the at least one binder component (a). Additive component (b) has from 12 to 72 carbon atoms, is substantially free of any heteroatoms, is not a crystalline solid at 75 DEG F/24 DEG C and comprises a mixture of two or more structures selected from the group consisting of aliphatic structures for additive component (b), aromatic-containing structures for additive component (b), cycloaliphatic-containing structures for additive component (b), and mixtures thereof, wherein at least one of the two or more structures is either a cycloaliphatic-containing structure or an aromatic-containing structure. The curable coating compositions are useful as powder coating compositions and powder slurry coating compositions having improved application performance properties.
Abstract:
The present invention provides a coating composition containing a two-stage polymer emulsion. The two-stage emulsion polymer contains composite polymeric particles of a first stage polymer prepared from about 0.25% to about 5% by weight monomer having at least two polymerizable ethylenically unsaturated groups, about 2.5% to about 10% by weight hydroxyl monomer, preferably at least about 50% by weight of non-functional monomer of hydrophobic monomer, and preferably without addition of any acid-functional monomer; and a second stage polymer having a theoretical glass transition temperature at least about 50 DEG C prepared using, by weight, about 25% to about 50% by weight hydroxyl monomer, about 3% to about 9% carboxylic acid monomer, preferably at least 25% by weight of non-functional monomer of hydrophobic monomer;. The composite polymeric particles have a theoretical glass transition temperature of not more than about 30 DEG C, preferably not more than about 0 DEG C, and include from about 0.8% to about 2% by weight of carboxylic acid monomer.
Abstract:
Powder coating composition for automotive exterior coatings with compatibility with other coatings and resistance to yellowing include a film-forming material such as a polyepoxide and an acid-functional crosslinker that is a reaction product of 1,3,5-tris(2-hdyroxyethyl)isocyanurate and a cyclic anhydride.
Abstract:
The invention provides curable waterborne coating compositions comprising an aqueous dispersion (A) comprising an organic binder component (A1) comprising at least 5% by weight of a reactive component (a), based on the total weight of organic binder component (A1), and at least one crosslinking component (B). The reactive component (a) is substantially free of any heteratoms and is a not a crystalline solid at room temperature and comprises from (i) 12 to 72 carbon atoms, and (ii) at least two functional groups. The curable waterborne coating compositions of the invention show significantly improved pop resistance while also providing improved chip resistance, weathering resistance, flexibility, and/or scratch & mar resistance.
Abstract:
A coating composition contains solid particulates of a mixture of an aminoplast crosslinking agent, a solid polymer having functionality reactive with the aminoplast crosslinking agent, and a crystalline, carbamate- functional additive. The crystalline, carbamate-functional additive has a melting point of at least about 30~C and is up to about 15% by weight of the powder coating composition.
Abstract:
Método para preparar un revestimiento compuesto sobre un sustrato que comprende la aplicación de una capa de una primera composición de revestimiento y la aplicación de una capa de una segunda composición de revestimiento, caracterizado porque al menos una de dichas primera y segunda composiciones de revestimiento es una composición de revestimiento en polvo que comprende particulados sólidos que incluyen, en una mezcla, (a) un producto de reacción ácido funcional de 1,3,5-tris(2-hidroxietil)isocianurato y un anhídrido cíclico y (b) un material filmógeno reactivo con el producto con grupos funcionales ácido de (a).
Abstract:
Composición de revestimiento que comprende una emulsión polimérica en dos etapas que contiene partículas poliméricas compuestas de un polímero de la primera etapa y de un polímero de la segunda etapa, caracterizada porque (a) el polímero de la primera etapa se prepara como emulsión en un medio acuoso mediante polimerización de una primera combinación de monómeros de adición que comprende (i) del 0, 25% al 5% en peso, con respecto al peso total de los monómeros polimerizados en la primera etapa, de como mínimo un monómero que contiene al menos dos grupos polimerizables etilénicamente insaturados; (ii) del 2, 5% al 10% en peso, con respecto al peso total de los monómeros polimerizados en la primera etapa, de al menos un monómero que tiene la funcionalidad hidroxilo, y (iii) no más del 0, 5% en peso, con respecto al peso total de los monómeros polimerizados en la primera etapa, de un monómero ácido carboxílico funcional; y (b) el polímero de la segunda etapa tiene una temperatura de transiciónvítrea teórica de al menos 50ºC y se prepara mediante polimerización, en presencia de la emulsión polimérica de la primera etapa, de una segunda combinación de monómeros de adición que está sustancialmente libre de monómeros que tienen más de un grupo polimerizable etilénicamente insaturado, comprendiendo dicha segunda combinación de monómeros de adición (i) del 25% al 50% en peso, con respecto al peso total de monómeros polimerizados en la segunda etapa, de al menos un monómero que tiene la funcionalidad hidroxilo; y (ii) del 3% al 9% en peso, con respecto al peso total de los monómeros polimerizados en la segunda etapa, de al menos un monómero que tiene la funcionalidad ácido carboxílico; y caracterizada además porque las partículas poliméricas compuestas tienen una temperatura de transición vítrea teórica de al menos -30ºC y no más de 30ºC y del 0, 8% al 2% en peso, con respecto al peso total de los monómeros polimerizados en las etapas primera y segunda, de al menos un monómero que tiene la funcionalidad ácido carboxílico.