DISPERSION DE PIGMENTOS.
    21.
    发明专利

    公开(公告)号:MX391215B

    公开(公告)日:2025-03-21

    申请号:MX2017012651

    申请日:2017-09-29

    Abstract: Los concentrados, los colorantes y las composiciones de recubrimiento líquidos contienen partículas de pigmento sólido dispersas en un diluyente líquido reactivo no volátil, que tiene una viscosidad menor que 1000 cps y que contiene al menos una especie molecular que tiene al menos tres sitios insaturados reactivos. El diluyente líquido reactivo puede servir como uno o más de un medio de dispersión para las partículas de pigmento sólido, un portador, un agente de coalescencia y un humectante, y puede reticularse o de otra manera curarse para formar una red polimérica interpenetrante en, o reticulada con, una composición de recubrimiento pigmentada que contiene un aglutinante polimérico formador de película. Las modalidades del diluyente líquido reactivo pueden proporcionar colorantes y composiciones de recubrimiento que tienen niveles reducidos de VOC, portadores convencionales, dispersantes convencionales, agentes de coalescencia convencionales y humectantes convencionales.

    BIOBASED POLYESTER
    22.
    发明专利

    公开(公告)号:CA2993164C

    公开(公告)日:2021-08-31

    申请号:CA2993164

    申请日:2016-07-14

    Inventor: MELNYK THOMAS J

    Abstract: Disclosed herein is a coating composition comprising: a binder comprising a linear polyester resin having at least about 1000 Mn, hydroxyl equivalent weight of at least about 1000 mg KOH per gram, and less than about 5 percent by weight aromatic groups, and optionally a curing agent capable of reacting with the linear polyester resin to produce a crosslinked polymeric network; and at least one pigment, wherein the linear polyester is prepared by condensation of one or more difunctional aliphatic acid, ester, or anhydride with at least one aliphatic polyol. The linear polyester resin is made by condensation of one or more aliphatic or cycloaliphatic polyols with one or more aliphatic or cycloaliphatic polyfunctional acids derived from biobased materials or a biological feedstock.

    LOW PENETRATION LOW FORMALDEHYDE ALKYD COMPOSITION

    公开(公告)号:CA2747438C

    公开(公告)日:2019-03-12

    申请号:CA2747438

    申请日:2009-12-18

    Abstract: Soak-in and strike through on the exposed end grain portions of low density or porous wood substrates including alder, birch, pine, poplar, and soft maple are reduced by applying to the end grain a solvent-borne coating composition containing an (i) alkyd resin having a hydroxyl number less than about 150, (ii) acid catalyst and (iii) cross linker. The resin desirably has a number average molecular weight greater than about 2000, and may have a Gardner coloration less than about 3 or may be a short oil alkyd based on coconut oil. By using a reduced hydroxyl number alkyd resin, a reduced cross linker amount may be employed, thereby reducing formaldehyde evolution in compositions made with methylated amino resin cross linkers such as methylated melamine resins.

    PROCESS FOR MANUFACTURING MEDIUM AND HIGH MOLECULAR WEIGHT POLYESTERS

    公开(公告)号:CA2715262C

    公开(公告)日:2017-11-28

    申请号:CA2715262

    申请日:2009-02-05

    Abstract: Medium and high molecular weight polyester polymers are prepared in syrup form from an ester oligomer. The oligomer is converted to the polymer by polycondensation at elevated pressure and elevated temperature in a nonreactive carrier capable of forming an azeotrope with water. The ester oligomerization or polycondensation reactions desirably are monitored using a non-viscometric technique. The process has a rapid cycle time. The syrup contains the polymer and nonreactive carrier, and may more conveniently be used to make initially non-solid products such as polyester coatings than is the case when employing pelletized solid polyester resins.

    Crosslinkable imide polyester coating

    公开(公告)号:AU2008245819B2

    公开(公告)日:2012-06-07

    申请号:AU2008245819

    申请日:2008-04-22

    Abstract: A primer/topcoat coil coating system employs crosslinkable branched hydroxyl-functional polyester-imide resins derived or derivable from a symmetric aromatic imide triol and a diacid or acid-producing derivative. The primer resin has a hydroxyl number greater than about 90 but not more than about 215, the topcoat resin has a hydroxyl number greater than about 100 but not more than about 215, and the primer and topcoat can each be hardened in 30 seconds or less to provide a coating having at least OT flexibility with no tape off and at least 2H pencil hardness.

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