Abstract:
Adhesives containing an aldehyde-based resin, a kraft lignin, and a surfactant and methods for making and using same are provided. In one or more embodiments, the adhesive can include an aldehyde-based resin; a kraft lignin; a surfactant; an alkaline compound; and water. The adhesive can have a viscosity of about 500 cP to about 5,000 cP, at a temperature of about 25°C. In one example, the adhesive can include about 20 wt% to about 40 wt% of the aldehyde-based resin, about 1 wt% to about 15 wt% of the kraft lignin, about 0.05 wt% to about 2 wt% of the surfactant, about 0.5 wt% to about 10 wt% of the alkaline compound, and about 45 wt% to about 70 wt% of water, where all weight percent values are based on a combined weight of the aldehyde-based resin, the kraft lignin, the surfactant, the alkaline compound, and the water.
Abstract:
Resins compositions and methods for making and using same. The resin composition can include a glyoxalated polyacrylamide resin and a polyamide-epihalohydrin resin. The polyamide-epihalohydrin resin can include a polyamine partially crosslinked with a bridging moiety and having azetidinium ions. The bridging moiety can be derived from a functionally symmetric crosslinker. A fiber product can include a plurality of fibers and the resin composition, where the resin composition can be at least partially cured.
Abstract:
Compositions that include hydrophobizing agents and stabilizers and methods for making and using same are provided. In at least one specific embodiment, a composition can include about 40 wt% to about 60 wt% lignosulfonic acid or a salt thereof, about 1 wt% to about 20 wt% of a hydrophobizing agent, and about 20 wt% to about 59 wt% of a liquid medium, where all weight percents are based on the combined weight of the lignosulfonic acid or salt thereof, the hydrophobizing agent, and the liquid medium.
Abstract:
This disclosure relates to papermaking and the use of creping adhesive and release agent compositions used in papermaking. In one aspect, there is provided a new class of release agents and compositions comprising release agents, the release agent comprising: a) a release agent comprising a quaternary imidazoline compound, an imidazoline free base, an oil-based dispersion, or a combination thereof; and b) a polyether component selected from a polypropylene glycol (PPG), a co-polymer of propylene glycol and ethylene glycol (co-PPG-PEG), a blend of polypropylene glycol (PPG) and polyethylene glycol (PEG), and a combination thereof, wherein the release composition has a cloud point in water at standard pressure from about 1°C to about 98°C. There are also provided creping compositions having a cloud point, comprising an adhesive composition and a release composition as described.
Abstract:
Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized glyoxalated polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising glyoxalated polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the glyoxalated polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized glyoxalated polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized glyoxalated polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.
Abstract:
A method for preparing a cationic polyacrylamide composition particularly suitable for making a glyoxylated polyacrylamide composition useful as a temporary wet-strengthening agent and the composition resulting from that method, along with the use of the composition for adding temporary wet strength to paper and the resulting strengthened paper products.
Abstract:
Methods for making cellulosic fiber webs using release aids containing one or more polyethers and one or more hydrophilic polymers. In at least one specific embodiment, a release aid having a first temperature can be applied to a drying surface having a second temperature. The second temperature can be greater than the first temperature. The release aid, in an aqueous solution that includes water and about 3 vol% of the release aid based on the total volume of the release aid and water, can have a cloud point greater than the first temperature and less than the second temperature at a pressure of 100 kPa. The method can also include adhering a cellulosic fiber web to the drying surface by contacting the cellulosic fiber web to the drying surface. The method can also include dislodging the cellulosic fiber web from the drying surface.
Abstract:
Hydrophobizing agents for use in making composite lignocellulose products are provided. In at least one specific embodiment, a method for making a composite product can include contacting a plurality of lignocellulosic substrates with a resin and a hydrophobizing agent to form a mixture. The hydrophobizing agent can include one or more vegetable waxes, one or more alkaline metal alkylsiliconates, one or more alkyl ketene dimers, one or more organosilanes, one or polysiloxanes, one or more Fischer-Tropsch waxes, one or more fluorinated polyurethanes, one or more fluorinated acrylate polymers, one or more olefin metathesis products, or any mixture thereof. The method can also include at least partially curing the mixture to produce a composite product.
Abstract:
Methods for making and using aqueous dispersions for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there are provided aqueous colloidal dispersions comprising nanoparticles of at least one colloidal clay and an aqueous fluorochemical, which can be applied to, on, or in paper, paperboard and cellulose fiber products. The paper and products that have been modified using these aqueous dispersions have good resistance to oil and grease penetration with lower overall amounts of aqueous fluorochemicals being required. Additional methods for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there is provided a process for improving the oil and grease resistance of a cellulose fiber material, the process comprising: a) applying a pretreatment composition comprising a cationic polymer to a cellulose fiber material in a size press to form a pretreated cellulose substrate; b) drying the pretreated cellulose substrate; and c) applying a fluorochemical composition to the dry pretreated cellulose substrate to form an oil-repellent cellulose fiber material.
Abstract:
Wet strengthened fiber products, wet strengthening resins, and methods for making such wet strengthened fiber products and wet strengthening resins. The wet strengthened fiber product can include a fiber web and an at least partially cured wet strengthening resin, which prior to at least partially curing, the wet strengthening resin can include a polyamide- epihalohydrin (PAE) resin and a cationic styrene maleimide (SMI) resin. The PAE resin can include a reaction product of a polyamidoamine and an epihalohydrin and the cationic SMI resin can include a reaction product of a styrene maleic anhydride (SMA) copolymer and an amine. The wet strengthened fiber product can include the wet strengthening resin in an amount of about 0.05 wt% to about 5 wt%, based on a dried weight of the wet strengthened fiber product.