AQUEOUS GLYOXALATED POLYACRYLAMIDE COMPOSITION

    公开(公告)号:WO2022147586A1

    公开(公告)日:2022-07-07

    申请号:PCT/US2022/070010

    申请日:2022-01-04

    Abstract: An aqueous composition includes water and a cationic polymeric resin having at least one reactive aldehyde group and formed from the reaction of glyoxal and a polymer. The polymer comprises at least one acrylamide repeating unit and at least one cationic repeating unit wherein a number of reactive aldehyde equivalents divided by a number of equivalents of residual glyoxal based on the total weight of the polymer is greater than about 1.2, wherein prior to reaction the polymer has greater than about 50 mole % acrylamide repeat units and from about 2 to about 30 mole % cationic repeating units, wherein greater than about 5 mole % of the acrylamide repeating units are converted to reactive aldehyde groups in the cationic polymer resin; and wherein the composition exhibits a viscosity gain of less than about 200%.

    TREATMENT OF PRINTING SUBSTRATE
    2.
    发明申请

    公开(公告)号:WO2018213191A1

    公开(公告)日:2018-11-22

    申请号:PCT/US2018/032572

    申请日:2018-05-14

    Abstract: A method of enhancing adhesion of an image to at least one surface of a substrate is provided herein. The method includes treating at least a portion of the surface by applying a composition comprising one or more polymers to the portion of the surface. The method further includes drying the composition after applying the composition to the substrate to form a treated substrate. The method further includes printing an image from an electrophotographic printer utilizing liquid toner technology on the treated substrate. The substrate is treated and dried less than about 5 minutes prior to being printed.

    COMPOSITIONS AND METHODS FOR TREATING A SUBSTRATE AND FOR IMPROVING ADHESION OF AN IMAGE TO A TREATED SUBSTRATE

    公开(公告)号:WO2019191289A1

    公开(公告)日:2019-10-03

    申请号:PCT/US2019/024367

    申请日:2019-03-27

    Abstract: A method for treating a substrate is provided herein. The method includes providing a substrate and applying a composition to the substrate to form the treated substrate. The composition includes a binder, a binder additive, and an aluminum salt. A method for improving adhesion of an image to the treated substrate is also provided herein. The method includes providing the substrate, applying the composition to the substrate to form the treated substrate, and applying a liquid toner to the treated substrate to form the image on the treated substrate. A printed material exhibiting improved adhesion of the image to the treated substrate is also provided herein. The printed material includes a treated substrate. The treated substrate includes the substrate and a coating disposed on the substrate and formed from the composition. The printed material further includes the image disposed on the treated substrate and formed from the liquid toner.

    COMPOSITION AND METHOD FOR INCREASING WET AND DRY PAPER STRENGTH

    公开(公告)号:WO2020176696A1

    公开(公告)日:2020-09-03

    申请号:PCT/US2020/020012

    申请日:2020-02-27

    Abstract: A composition for increasing paper strength includes a dialdehy de-modified polyacrylamide strengthening agent, a water soluble compound that is soluble at about 5 wt% or greater in water at about 25°C, and water. The water soluble compound is typically present in a weight amount that is greater than a weight amount of the strengthening agent. The composition is formed by combining the strengthening agent and the water soluble compound in aqueous media to form the composition, wherein on a dry basis the water soluble compound is typically present in a greater amount than the strengthening agent, drying the composition to form a powder or paste that has a water content of less than about 10 weight percent and is stable after storage at about room temperature for about six months, and reconstituting the powder or paste by adding water thereto, The reconstituted composition may then be used to make paper.

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