PLASTICIZING DEDUCTING AGENTS FOR GASKETING COMPOUNDS

Abstract

A joint compound comprising calcium sulfate hemihydrate and / or at least one filler, wherein the total amount of the at least one filler and / or calcium sulfate hemihydrate is at least approximately 50% by weight of the dry-basis (water-free) joint compound, preferably the filler comprising calcium carbonate, calcium sulfate dihydrate or calcium sulfate anhydrite, or a mixture thereof; binder in up to approximately 15% by weight of the dry-basis joint compound; polymeric thickener in up to approximately 3% by weight of the dry-basis joint compound; plasticizing dust-removing agent in from approximately 0.01 to approximately 3% by weight of the dry-basis (water-free) joint compound; and an additive in up to approximately 10% by weight of the dry-basis joint compound.

Description

PLASTICIZING DEDUCTING AGENTS FOR GASKETING COMPOUNDS FIELD OF INVENTION This invention relates in general to gasket compounds comprising plasticizing dust-removing agents, such as glycol dibenzoates. BACKGROUND OF THE INVENTION In building construction, one of the most common building materials is gypsum board, often called drywall, used in the construction of walls and / or ceilings. The board can be composed of any of a variety of materials, including, but not limited to, cementitious materials such as cement or gypsum. Walls made of gypsum board are traditionally constructed by attaching the boards to wooden studs or metal frames and treating the joints between adjacent panels with a specially prepared adhesive called joint compound. Gypsum board is easily adaptable to walls of unusual dimensions and can be shaped around structural elements such as beams or pipes.The side edges of the plasterboard panels are tapered, allowing joint compound to be applied at the joint between adjacent panels, creating a monolithic surface once completed. q Lcnnn / zznz / E / YiAi Ref. 330727 It is well known in the trade that finishing a joint between boards involves at least three steps. First, a thin layer of joint compound is applied to the boards over the joint, and a liquid-permeable paper or fiberglass tape is inserted. Next, a second layer of joint compound is applied over the inserted tape. This second layer of joint compound typically extends approximately 5.1 cm (2 in) beyond the edges of the tape. Finally, a third layer of joint compound is applied over the first two layers, with the third layer generally extending even further beyond the edges of the tape. The second and third layers can be lightly sanded after drying. Additional layers may be necessary to achieve the desired finish in certain areas with critical lighting.Joint compounds are also used to make repairs to defects, such as uneven surfaces, holes, depressions, gaps, dents, and other imperfections, including imperfections around electrical boxes, pipes and conduits, as well as corners created by the intersection of drywall. There are several categories of joint compounds. Drying-type compounds cure through water evaporation, while setting-type joint compounds react chemically with water during the curing process. Setting-type joint compounds typically use calcium sulfate hemihydrate, also known as plaster of Paris, as a base. When water is added to the setting-type powder, it reacts with the calcium sulfate hemihydrate through a hydration reaction to form a crystal assembly matrix of calcium sulfate dihydrate. This crystal assembly matrix gives the compound greater strength.The advantage of a setting-type joint compound over a drying-type compound is that you don't have to wait for the compound to fully dry before finishing, resulting in less shrinkage and cracking, and greater overall strength of the finished joint. Drying-type joint compounds have the advantage of being easy to use, as they are generally supplied premixed, requiring the manufacturer to add water and mix. A third type of joint compound combines the setting action of a calcium sulfate hemihydrate-based compound with the ease of use of a premixed compound. The properties of a premixed setting-type joint compound are taught in U.S. Patent No. 5,746,822 to Espinoza, incorporated herein by reference. US Patent No. 5,746,822 to Espinoza et al.This describes a set-type cementitious composition that can be set and hardened after the introduction of an accelerator. The cementitious base composition contains calcium sulfate hemihydrate as the primary filler and certain non-calcium phosphate additives that prevent setting in the presence of water. Alternatively, the premixed cementitious composition can be used as a dry-type joint compound without the accelerator. Additional ingredients that can be used in the joint compound include preservatives, wetting agents, defoamers, and plasticizers. Kaplan's US patent 5,494,947 describes a joint compound comprising an acrylate, a biocide, a reinforcing agent, a latex, a first surfactant, a plasticizer, a coalescing agent, a fungicide, a filler, and a second coalescing agent. The plasticizer may be a liquid benzoate ester. Plasticizers impart high strength to the flexible joint compound mixture. One class of plasticizers that provides optimal results is liquid benzoate esters. One such ester, dipropylene glycol dibenzoate, is marketed as Benzoflex® 9-88 by Velsicol, located at Rosemont, 111. The weight percentages in the formulation will range from 0 to 8 percent. Batel's US patent 5,779,786 describes a premixed, set-type joint compound made from a mixture that includes calcium sulfate hemihydrate, water, and a set retarder. The joint compound preferably includes a plasticizer to provide improved adhesion to the substrate in cold weather. Useful plasticizers include dibutyl phthalate, which is available from Kalama Chemicals of Seattle, Wash. A suitable plasticizer is marketed under the trade name BENZOPLEX by Velsicol Chemical Corp. of Memphis, Tenn. US patent 6,805,741 by Liu et al. describes a premixed composition that sets when mixed with an activator to cause the reaction of calcined gypsum with water to form set gypsum. The composition comprises water and calcined gypsum, as well as a setting inhibitor comprising a polyacrylic acid and / or a salt thereof. The composition may further comprise a plasticizer, wherein the plasticizer is a polycarboxylic polyether compound, a salt of a polycarboxylic polyether compound, or combinations thereof. U.S. Patent No. 8,673,071 to Immordino Jr. et al., maturing from the publication of U.S. Patent Application No. 20080141909 to Immordino Jr. et al., describes the improvement of the bond between gasket compounds and substrates by the addition of thickeners, plasticizers and / or powdered polyvinyl alcohol. US patent 9,643,887 by Ayambem et al. describes a joint compound composition comprising: a filler material selected from the group that consists of calcium carbonate, calcium sulfate dihydrate, and calcium sulfate hemihydrate; a first binder comprising a first polymer, wherein the first binder has a glass transition temperature equal to or greater than approximately -10 °C; and a second binder comprising a second polymer, wherein the second binder has a glass transition temperature in the range of approximately -80 °C to approximately 10 °C, wherein the glass transition temperature of the first binder is at least approximately 5 °C higher than the glass transition temperature of the second binder; and wherein the first and second polymers have the same chemistry. The second binder further comprises a plasticizer.The plasticizer is selected from the group consisting of a diethylene dibenzoate ester and a dipropylene dibenzoate ester. The plasticizer depresses the glass transition temperature of the polymer. US patent 9,683,143 by Negri et al. describes an adhesive composition comprising a polymeric binder, a filler, a rheology modifier, and an associative thickener. The binder is a combination of polyvinyl acetate and polyvinyl alcohol in an amount of 10% to 40% by weight. The composition may further comprise a compound selected from the group consisting of a colorant, a foaming agent, a defoaming agent, a buffering agent, an anti-settling agent, a wetting agent, a plasticizer, and any combination thereof. US patent 2010 / 0175590 by Stevens et al. describes a premixed, set-type joint compound and a set initiator. The set-type joint compound includes a premixed, set-type joint compound base with a calcium-free phosphate set-preventing agent that prevents the chemical hydration of a gypsum component of the set-type joint compound. The joint compound base is calcium carbonate-free. The joint compound optionally includes plasticizers. Between coats of joint compound, and before painting the wall, it's necessary to sand the compound to even out the surface. When doing this, the resulting dust is usually very fine and tends to remain airborne, settling only after extended periods. This long dwell time allows it to travel long distances from the wall. In home renovations, this fine dust doesn't stay in the area immediately adjacent to where the joint compound is applied, but is often found throughout the house, resulting in dust settling everywhere. Liquid mineral oils and solid waxes (e.g., polyethylene glycol wax) are known to reduce dust in gypsum-based compositions and are often incorporated into joint compounds as a dedusting agent. A dedusting agent is defined as a material with the ability to reduce the production of airborne dust generated by sanding or other disturbance and / or with the ability to reduce the airborne residence time of the generated dust compared to a similar material without the dedusting additive. Airborne dust typically has a particle size of less than 10 microns. Examples of solid wax and mineral oil dedusting agents are described in U.S. Patent No. 6,673,144 to Immordino, Jr. et al., and U.S. Patent No. Langford's 6,676,746 and 8,329,785 and Langford's US patent application publication no. 2003 / 0066456.Specifically, Langford patent US 8,329,785 describes gasket compound ingredients such as preservatives, fungicides, antifreeze, wetting agents, defoamers, flocculants (such as polyacrylamide resin), and plasticizers (such as dipropylene glycol dibenzoate). Langford patent US 8,329,785 also describes dust-reducing additives such as oils, surfactants, solvents, waxes, and other petroleum derivatives. Langford patent US 2003 / 0066456 describes dust-reducing additives such as oils (such as mineral oils, vegetable oils, and animal oils), surfactants, oleoresinous mixtures, pitch, solvents, paraffins, waxes (including natural and synthetic waxes), glycols, and other petroleum derivatives.Other materials that do not fit into the categories above, such as molasses, can also effectively reduce the amount of dust generated by a wall repair compound, according to Langford. However, these dust-reducing agents have several limitations. For example, liquid mineral oils and waxes are essentially free molecules that disperse individually in the joint compound. As they dry, thermodynamics and their physical wetting properties cause these molecules to migrate to the surface of the gypsum product, resulting in an uneven distribution of dust-reducing properties. Furthermore, when on the surface, liquid mineral oils and waxes also cause a loss of adhesion to the substrate at higher concentrations. Additionally, when water-soluble synthetic waxes are added to the water in the slurry with other solid components, the solid synthetic waxes tend to float on the surface for a long time, dissolving slowly after prolonged mixing. Alternative dusting agents have been developed that include wax emulsions and polymer-coated wax core particles, for example, as described in U.S. Patent No. 10,329,203 by Ayambem et al. and U.S. Patent Application Publications No. 2015 / 0158999 and 2016 / 0376798 by Ayambem. US patent 2014 / 0275369 by Stewart et al. describes ready-to-use (wet) and ready-to-set (dry) repair products with antistatic additives that produce fewer persistent dust particles in the air after sanding. These repair products may also include one or more rheology modifiers, which can include surfactants, thickeners, dispersion aids, and / or plasticizers. SUMMARY OF THE INVENTION This invention relates in general to gasket compounds comprising novel plasticizing dust-removing agents. The gasket compound comprises: calcium sulfate hemihydrate and / or at least one filler agent, wherein a total amount of the at least one filler agent and / or calcium sulfate hemihydrate is at least approximately 50 percent by weight (% wt), preferably at least 75% by weight, of the dry-base (water-free) joint compound, preferably the filler agent comprising calcium carbonate, calcium sulfate dihydrate or calcium sulfate anhydrite, or a mixture thereof; q Lcnnn / zznz / E / YiAi a binder in up to approximately 15% by weight of the dry-basis joint compound; a polymeric thickener in up to approximately 3% by weight of the dry-basis joint compound; a plasticizing dusting agent in approximately 0.01 to approximately 3% by weight, or typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or more typically approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound; and an additive in up to approximately 10% by weight of the dry-type dry-based joint compound. The joint compound may be a drying-type (TS) joint compound comprising joint compound components and water, wherein the joint compound components comprise the filler, binder, polymer thickener, plasticizing dust-reducing agent, and additive, wherein: the filling agent comprises a primary filling agent in approximately 50 to approximately 98% by weight of the dry-base, dried-type joint compound, wherein the primary filling agent comprises one selected from the group consisting of calcium carbonate, calcium sulfate dihydrate, and calcium sulfate anhydrite, and a mixture of these; the filler agent comprises a secondary filler agent in up to approximately 25% by weight of the dry-base, dry-type joint compound; wherein the primary filler and the secondary filler each amount to a total of at least approximately 75% by weight on a dry basis; the binder is approximately 1 to approximately 15% by weight of the dry-base type joint compound; The polymeric thickener is approximately 0.05% by weight to approximately 3% by weight of the dry-baked type joint compound; The plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or typically approximately 0.1 to approximately 0.5% by weight, or typically approximately 0.3 to approximately 3% by weight, or preferably approximately 0.5 to approximately 3% by weight, with greater preference approximately 0.5 to approximately 2% by weight, or with greater preference approximately 0.7 to approximately 2% by weight, or with maximum preference approximately 0.7 to approximately 1.5% by weight of the dry-based joint compound; and the additive is up to approximately 10% by weight of the dry-based dry-type joint compound; and wherein the water is in a water-to-joint-compound weight ratio of approximately 1:3 to approximately 3:1. The joint compound can be a set-type (TE) joint compound, where: Calcium sulfate hemihydrate is approximately 20 to approximately 99% by weight of the dry-setting type joint compound; the filler agent is approximately 0.44% by weight to approximately 43% by weight of the dry-setting type joint compound; The total calcium sulfate hemihydrate and filler agent is approximately 63% by weight to approximately 99.44% by weight of the dry-setting type joint compound; the binder is approximately 0.5 to approximately 8% by weight of the dry-setting type joint compound; The polymeric thickener is approximately 0.05 to approximately 2% by weight of the dry-setting type joint compound; The plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound; and the additive is up to approximately 10% by weight of the dry-based curing-type joint compound. The joint compound may be a premixed, set-type joint compound comprising joint compound components and water, wherein the joint compound components comprise calcium sulfate hemihydrate, binder, polymer thickener, plasticizing dust-removing agent, additive, a set retarder, and, if present, a filler, wherein: Calcium sulfate hemihydrate is approximately 20 percent by weight (% wt) to approximately 99% by weight of the dry-baked, premixed, set-type joint compound; the filler agent is approximately 0.989% by weight to approximately 55% by weight of the dry-baked, premixed, set-type joint compound; The total calcium sulfate hemihydrate and filling agent is approximately 75% by weight to approximately 99.989% by weight of the premixed dry-basis set joint compound; The setting retarder is approximately 0.001 to approximately 2% by weight of the dry-baked, premixed, set-type joint compound; the binder is up to approximately 8% by weight of the dry-baked, pre-setting type joint compound; The polymeric thickener is up to approximately 2% by weight of the dry-baked, pre-setting type joint compound; The plasticizing dust-removing agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound; and the additive is up to approximately 10% by weight of the dry-based, premixed, set-type joint compound; and the water is in a water-to-joint-compound ratio of approximately 1:3 to approximately 3:1. q Lcnnn / zznz / E / YiAi Other advantages, benefits, and aspects of the invention are discussed below, illustrated in the accompanying figures, and will be understood by those skilled in the art from the more detailed description below. All percentages, ratios, and proportions herein are by weight unless otherwise specified. As used at least in the present description, and not as an attempt to limit the application of the doctrine of equivalents to the scope in accordance with the claim, each numerical parameter modified by the expression approximately should be interpreted at least in light of the number of significant digits reported and applying ordinary rounding techniques. BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a graph of the average air dust concentration (mg / m3) produced from each sample of the Example. Figure 2 is a graph of the dusting efficiency for each sample in the Example. DETAILED DESCRIPTION OF THE INVENTION All percentages and ratios used herein are by weight (i.e., % by weight) unless otherwise stated. The present invention provides gasket compounds comprising a plasticizing dusting agent, such as glycol dibenzoates. Regarding wax emulsions and polymer-coated wax core particles, these plasticizing dusting agents are hydrophobic particles with a coating (polymer or emulsifier) ​​that allows for better dispersion in water. Unlike some dusting additives, such as polyethylene glycol, plasticizers have minimal impact on performance. Typically, there is an absence of dusting agents other than the plasticizer. Therefore, there is typically an absence of one or more liquid mineral oils and solid waxes (e.g., polyethylene glycol wax), wax emulsions, and polymer-coated wax core particles. Gasket compounds The present invention is directed, at least in part, to gasket compounds with reduced dust-forming properties. More specifically, the gasket compounds comprise a plasticizing dust-reducing agent. The gasket compound of the invention comprises: calcium sulfate hemihydrate and / or at least one filler agent, wherein a total amount of the at least one filler agent and / or calcium sulfate hemihydrate is at least approximately 50 percent by weight (% wt) of the dry-basis (water-free) joint compound, wherein the filler agent comprises calcium carbonate, calcium sulfate dihydrate or calcium sulfate anhydrite, or a mixture thereof; a binder in up to approximately 15% by weight of the dry-basis joint compound; a polymeric thickener in up to approximately 3% by weight of the dry-basis joint compound; a plasticizing dusting agent in approximately 0.01% by weight to approximately 3% by weight of the dry-based (water-free) joint compound; and an additive in up to approximately 10% by weight of the dry-type dry-based joint compound.A variety of joint compounds have been commercially available and described in print publications and patents. Generally, such compound compositions are referred to as drying-type joint compounds, setting-type joint compounds, or premixed setting-type joint compounds. They consist of calcium sulfate dihydrate and / or at least one filler agent (e.g., calcium carbonate, calcium sulfate hemihydrate, or calcium sulfate anhydrite), a binder, a polymeric thickener, a plasticizer, and various other additives such as a preservative. The plasticizing dust-removing agent of the present invention is suitable for drying-type joint compounds, setting-type joint compounds, or premixed setting-type joint compounds.The terms drying-type joint compounds, setting-type joint compounds, and premixed setting-type joint compounds are technical terms. Premixed dry-type joint compounds are premixed with water during manufacturing and require little or no additional water at the job site. Dry-type joint compounds may also be dry powders that are mixed with water at the job site. Dry-type joint compounds harden as the water evaporates and the compound dries. Dry-type joint compounds contain a substantial filler component. Dry-type joint compounds contain an inert filler component and lack solid materials, such as calcium sulfate hemihydrate, that set when mixed with water. Before use (usually during manufacturing), the filler, a binder, a thickener, a dusting agent, and optionally various other ingredients are mixed with water for a specific time to produce the dry-type joint compound.This type of compound has a basic pH. Once the dry-type joint compound is applied to drywall, the compound dries (i.e., the water evaporates) and leaves a relatively hard, dry cementitious material. The joint compound may be a drying-type joint compound comprising joint compound components and water, wherein the joint compound components comprise the filler, binder, polymer thickener, plasticizing dust-reducing agent, and additive, wherein: the filling agent comprises a primary filling agent in approximately 50 to approximately 98% by weight of the dry-base, dried-type joint compound, wherein the primary filling agent comprises one selected from the group consisting of calcium carbonate, calcium sulfate dihydrate, and calcium sulfate anhydrite, and a mixture thereof; the filler agent comprises a secondary filler agent in up to approximately 25% by weight of the dry-base, dry-type joint compound; wherein the primary filler and the secondary filler each amount to a total of at least approximately 75% by weight on a dry basis; the binder is approximately 1 to approximately 15% by weight of the dry-base type joint compound; The polymeric thickener is approximately 0.05 to approximately 3% by weight of the dry-baked type joint compound; q Lcnnn / zznz / E / YiAi the plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or typically approximately 0.1 to approximately 0.5% by weight, or typically approximately 0.3 to approximately 3% by weight, or preferably approximately 0.5 to approximately 3% by weight, with greater preference approximately 0.5 to approximately 2% by weight or, with greater preference, approximately 0.7 to approximately 2% by weight or, with maximum preference, approximately 0.7 to approximately 1.5% by weight of the dry-based joint compound; and the additive is up to approximately 10% by weight of the dry-based, dry-type joint compound; and wherein the water is in a water-to-joint-compound weight ratio of approximately 1:3 to approximately 3:1. Table 1 provides examples of dry-type joint compound formulations of the present invention, where water is present in the mixture for a premixed dry-type joint compound, or water is subsequently mixed with the other components in the indicated amounts. Typically, the values ​​in a single column of the table are used together. However, the values ​​in one column may be substituted for those in another column when mathematically permissible. q Lcnnn / zznz / E / YiAi Table 1: Formulations of compounds for drying-type (TS) joints Component Usable Range Preferred Range Most Preferred Range Specific Example Primary Filler (% wt dry basis) 50 to 98 50 to 93 65 to 93* or 50 to 93** 65 to 93* or 55 to 75** Secondary Filler*** (% wt dry basis) up to 25 up to 25 3 to 25 4 to 25 Total of primary and secondary filler (% wt dry basis) at least 75 at least 75 at least 75 at least 80 Binder (% wt dry basis) 1 to 15 1 to 10 1 to 10 1 to 8 Polymer Thickener (% wt dry basis) 0.05 to 3 0.1 to 3 0.1 to 2 0.5 to 2 Plasticizing Dusting Agent (% wt dry basis) 0.01 to 3 0.3 to 3 or 0.5 to 3 0.5 to 2.0 or 0.7 to 2.0 or 0.7 to 1.5 0.7 to 2.0 Other additives (% by weight on a dry basis) up to 10 up to 10 0.01 to 10 0.1 to 10 Water (weight ratio of water to joint compound components) 1:3 to 3:1 1:3 to 2:1 1:3 to 1:1 1:2 *if the primary filler is mainly (more than half the % by weight on a dry basis) calcium carbonate **if the primary filler is mainly (more than half the % by weight on a dry basis) calcium sulfate dihydrate and / or calcium sulfate anhydrite A set-type joint compound typically includes calcium sulfate hemihydrate (CaSO₄·H₂O; also called calcined gypsum). A set-type joint compound is a joint compound that sets rather than simply drying. When mixed with water, the calcium sulfate hemihydrate hydrates, resulting in the formation of interlocking dihydrate crystals. Once complete, a dry, relatively hard cementitious material is obtained. The rehydration of calcium sulfate hemihydrate usually occurs within a fairly short time. Therefore, set-type compound compositions are generally supplied to the job site as a dry powder to which the user then adds sufficient water to give the compound a consistency suitable for application to the wall. The joint compound can be a curing-type joint compound, where: Calcium sulfate hemihydrate is approximately 20 to approximately 99% by weight of the dry-setting type joint compound; the filler agent is approximately 0.44% by weight to approximately 43% by weight of the dry-setting type joint compound; The total calcium sulfate hemihydrate and filler agent is approximately 63% by weight to approximately 99.44% by weight of the dry-base curing joint compound q Lcnnn / zznz / E / YiAi; the binder is approximately 0.5 to approximately 8% by weight of the dry-setting type joint compound; The polymeric thickener is approximately 0.05 to approximately 2% by weight of the dry-setting type joint compound; The plasticizing dust-removing agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound; and the additive is up to approximately 10% by weight of the dry-based curing-type joint compound. Table 2 provides examples of the dry powder formulations of set-type jointing compounds of the present invention. Water may be added to the dry powder before use at a water-to-jointing compound weight ratio of approximately 1:3 to approximately 3:1, preferably approximately 1:2. Typically, the values ​​in a single column of the table are used together. However, the values ​​in one column may be substituted for those in another column where mathematically permissible. q Lcnnn / zznz / E / YiAi Table 2: Formulations of compounds for type q joints Lcnnn / zznz / E / YiAi setting (TF) Component Usable Range Preferred Range Most Preferred Range Specific Example Calcium sulfate hemihydrate (% wt dry basis) 20 to 99 50 to 98 60 to 85 65 to 85 Filler (% wt dry basis) 0.44 to 43 0.84 to 33 13.5 to 29 4.5 to 25 Total Calcium sulfate hemihydrate and filler (% wt dry basis) 63 to 99.44 83 to 98.84 89 to 98.7 89.5 to 98.7 Binder (% wt dry basis) 0.5 to 8 1 to 8 1 to 4 1 to 4 Polymeric thickener (% wt dry basis) 0.05 to 2 0.1 to 2 0.1 to 1 0.1 to 1 Agent Dusting agent plasticizer (% by weight on a dry basis) 0.01 to 3 0.05 to 2 0.1 to 1 (or 0.3 to 1 if the total calcium sulfate hemihydrate and filler agent is 89 to 98.5) 0.1 to 0.5 Other additives (% by weight on a dry basis) up to 10 up to 5 0.1 to 5 0.1 to 5 A premixed set-type joint compound is an aqueous suspension set-type joint compound that contains a sufficient concentration of set retarder to prevent setting before use. When ready to use, an accelerator is added in an amount to achieve a desired setting time. The joint compound may be a premixed, set-type joint compound comprising joint compound components and water, wherein the joint compound components comprise calcium sulfate hemihydrate, binder, polymer thickener, plasticizing dust-removing agent, additive, a set retarder, and, if present, a filler, wherein: Calcium sulfate hemihydrate is approximately 20 percent by weight (% wt) to approximately 99% by weight of the dry-baked, premixed, set-type joint compound; the filler agent is approximately 0.989% by weight to approximately 55% by weight of the dry-baked, premixed, set-type joint compound; The total calcium sulfate hemihydrate and filler agent is approximately 75% by weight to approximately 99.989% by weight of the premixed dry-basis set joint compound; The setting retarder is approximately 0.001 to approximately 2% by weight of the dry-basis premixed set-type joint compound; the binder is up to approximately 8% by weight of the dry-basis premixed set-type joint compound; The polymeric thickener is up to approximately 2% by weight of the dry-baked, pre-setting type joint compound; The plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound, and the additive is up to approximately 10% by weight of the dry-based premixed set-type joint compound; and water is in a water-to-joint-compound ratio of approximately 1:3 to approximately 3:1. Table 3 provides examples of premixed, self-setting joint compound formulations of the present invention. Typically, the values ​​in a single column of the table are used together. However, the values ​​in one column may be substituted for those in another column when mathematically permissible. q Lcnnn / zznz / E / YiAi Table 3: Formulations of premixed set-type joint compounds Component Usable Range Preferred Range Most Preferred Range Specific Example Calcium sulfate hemihydrate (% by weight on a dry basis) 20 to 99 50 to 98 60 to 85 65 to 85 Filler agent (% by weight on a dry basis) 0.989 to 55 1.93 to 33 14.6 to 28 13.45 to 23.75 Total Calcium Sulfate Hemihydrate and Filler (% by weight on a dry basis) 75 to 99.898 83 to 99.93 88 to 99.6 88.75 to 98.45 Set Retarder (% by weight on a dry basis) 0.001 to 2 0.01 to 2 0.1 to 1 0.25 to 0.75 Binder (% by weight on a dry basis) up to 8 up to 6 up to 4 1 to 4 Polymer Thickener (% by weight on a dry basis) up to 2 up to 2 0.1 to 1 0.1 to 1 Dusting Agent / Plasticizer (% by weight on a dry basis) 0.01 to 3 0.05 to 2 0.1 to 1 (or 0.3 to 1 if the total calcium sulfate hemihydrate is 88 to 99.4) 0.1 to 0.5 Other additives (% by weight on a dry basis) up to 10 0.01 to 5 0.1 to 5 0.1 to 5 Water (weight ratio of water to joint compound components) 1:3 to 3:1 1:3 to 2:1 1:3 to 1:1 1:2 q Lcnnn / zznz / E / YiAi Plasticizing dedusting agent The plasticizing dusting agents used in the present invention comprise one or more of any suitable plasticizer. The plasticizing dusting agent may comprise one or more dibenzoates, for example, glycol dibenzoates. A typical dibenzoate plasticizer is one or more of the glycol dibenzoates, such as diethylene glycol dibenzoate, dipropylene glycol dibenzoate, and propylene glycol dibenzoate. Therefore, for example, plasticizing dusting agents may include, among others, dipropylene glycol dibenzoate; a mixture of diethylene glycol dibenzoate and dipropylene glycol dibenzoate; or a mixture of diethylene glycol dibenzoate, dipropylene glycol dibenzoate, and propylene glycol dibenzoate. The plasticizer may be one or more of hydroxypropylcellulose (HPC), sorbitol and related sugar alcohols, polyvinylpyrrolidone, and polymer plasticizers. However, one or more of these may be absent. The plasticizing dusting agent may comprise one or more ester plasticizers such as one or more sebacates, adipates, maleates, such as bis(2-ethylhexyl)adipate (DEHA), dimethyl adipate (DMAD), monomethyl adipate (MMAD), dioctyl adipate (DOA), dibutyl sebacate (DBS), dibutyl maleate (DBM), diisobutyl maleate (DIBM), gluterates, and azelates; trimellitates, such as trimethyl trimellitate (TMTM), tri-(2-ethylhexyl)trimellitate (TEHTM) (TOTM), tri-(n-octyl,ndecyl)trimellitate (ATM), tri-(heptyl,nonyl)trimellitate (LTM) and n-octyl trimellitate (OTM), azelates and benzoates, diisononyl acid ester dicarboxylic 1,2-cyclohexane, alkylsulfonic acid phenyl ester (ASE), glycols and polyethers, such as triethylene glycol dihexanoate (3G6, 3GH), tetraethylene glycol diheptanoate (4G7), polymeric plasticizers and polybutene. However, one or more of these may be absent. Typically, there is an absence of plasticizers of q Lcnnn / zznz / E / YiAi phthalate. Typically, there is an absence of organophosphate plasticizers. There is an absence of chlorinated paraffins. There may be an absence of trimellitates. Preferably, the plasticizing dusting agent is not used with other plasticizers that do not function as dusting agents. More typically, the plasticizing dusting agent is solely one or more glycol dibenzoates. Plasticizing dusting agents can be used in liquid form, dry form, encapsulated liquid form, suspensions, and solutions. The plasticizer can be mixed either with the joint compound components of the joint compound formulation or with a joint compound suspension. Alternatively, the plasticizing dust-removing agent dispersed in an aqueous solvent can be added to the joint compound suspension. One of the benefits of this invention is that sandpaper clogging is reduced with this low level of plasticizing dusting agent while still achieving good dust removal. Another benefit is that this low level of plasticizing dusting agent also reduces the adhesion and gripping problems that occur with sandpaper. Preferably, when preparing a joint compound, the plasticizing dusting agent is dispersed as an aqueous suspension, from approximately 0.01 to approximately 3% by weight, preferably from approximately 0.05 to approximately 2% by weight, with a higher preference from approximately 0.1 to approximately 1% by weight, and with a maximum preference from approximately 0.1 to approximately 0.5% by weight of the dry-basis (water-free) joint compound. The plasticizing dusting agent may be not less than approximately 0.01% by weight, preferably not less than approximately 0.01%.0.5% by weight, more preferably not less than approximately 0.1% by weight or not less than 0.3% by weight (all on a dry basis). In the case of a drying-type joint compound, the plasticizing dust-removing agent is, more preferably, not less than approximately 0.5% by weight or, more preferably, not less than 0.7% by weight (all on a dry basis). The plasticizing dust-removing agent may be not more than approximately 3% by weight, preferably not more than approximately 2% by weight, typically not more than approximately 1% by weight, and typically not more than approximately 0.5% by weight. Calcium sulfate hemihydrate Set-type and premixed set-type joint compounds contain calcium sulfate hemihydrate. There are two main forms used: the alpha and beta crystalline forms. Generally, the alpha form is the more expensive of the two and produces a stronger product. The beta form is suitable for many uses and, being less expensive, is more commonly used. For the joint compounds of the invention, any type of hemihydrate, including mixtures, can be used, but the alpha form is preferred. For set-type joint compounds and premixed set-type joint compounds, calcium sulfate hemihydrate may be included in approximately 20% by weight to approximately 99% by weight on a dry basis of the joint compound, preferably approximately 50% by weight to approximately 98% by weight on a dry basis, more preferably approximately 50% by weight to approximately 80% by weight on a dry basis, and, most preferably, approximately 65% ​​by weight to approximately 75% by weight on a dry basis. Filling agents Typically, the joint compound of the present invention includes calcium sulfate hemihydrate and / or at least one filler agent, wherein a total amount of the at least one filler agent and / or calcium sulfate hemihydrate is at least approximately 50 percent by weight (% wt), preferably at least 75% by weight, of the dry-basis (water-free) joint compound, preferably the filler agent comprising calcium carbonate, calcium sulfate dihydrate or calcium sulfate anhydrite, or a mixture thereof. In dry-type joint compounds, the fillers typically include a primary filler and optionally a secondary filler. Examples of primary fillers include calcium carbonate (or limestone), calcium sulfate dihydrate, calcium sulfate anhydrite, and mixtures thereof. Another source of calcium carbonate is dolomite. Dolomite is an anhydrous carbonate mineral composed of calcium and magnesium carbonate, e.g., CaMg(COj)2. Therefore, for example, in the invention, the calcium carbonate, in an amount of approximately 50% to approximately 98% by weight on a dry basis of the joint compound, includes one or more of calcium carbonate, limestone, and dolomite in an amount of approximately 50% to approximately 98% by weight on a dry basis of the joint compound. The primary filler may be included in approximately 50% to approximately 98% by weight on a dry basis of the dry-type joint compound, and preferably from approximately 50% to approximately 93% by weight on a dry basis. For example, calcium carbonate as the primary filler may preferably be included in a dry-type joint compound from approximately 65% ​​to approximately 65% ​​by weight on a dry basis. In another example, calcium sulfate dihydrate as the primary filler may preferably be included in a dry-type joint compound from approximately 50% to approximately 93% by weight on a dry basis, and more preferably from approximately 55% to approximately 75% by weight on a dry basis. Examples of secondary fillers include, but are not limited to, talc, glass microbubbles, mica, perlite, pyrophyllite, silica, calcium sulfate anhydrite, diatomaceous earth, clay (e.g., attapulgite, sepiolite, and kaolin), resin microspheres, and mixtures thereof. Perlite may be uncoated. Perlite may be coated, which is perlite coated with a hydrophobic coating, such as one containing siloxane or silane. Perlite may be a mixture of coated and uncoated perlite. Secondary fillers can be useful as fillers and can also be used to impart specific properties to joint compounds. For example, mica helps reduce cracking of the joint compound as it dries and is preferred in amounts up to 25% by weight on a dry basis.It is also preferred to add clay in quantities up to approximately 10% by weight on a dry basis to improve the density and malleability of the compound for q Lcnnn / zznz / E / YiAi joints, and as a rheology modifier. The secondary filler agent can be included in up to approximately 25% by weight on a dry basis of the joint compound, preferably from approximately 3% by weight to approximately 25% by weight on a dry basis, and more preferably from approximately 4% by weight to approximately 25% by weight on a dry basis. In addition to functioning as a filler, secondary fillers can impart specific properties to joint compounds. For example, clay can be used in quantities up to approximately 10% by weight on a dry basis to improve the density and workability of the joint compound, and as a rheology modifier. Typically, the primary filler and secondary fillers comprise at least approximately 75% by weight on a dry basis of the dry-type joint compound. Typically, the fillers contain less than 15% by weight of acrylates on a dry basis. The fillers may exclude acrylates. Typically, the filler agents for the joint compounds of the present invention do not include >15% by weight of acrylates. In curing-type joint compounds and premixed curing-type joint compounds, the filler agent q Lcnnn / zznz / E / YiAi can be any of the primary fillers mentioned above and / or any of the secondary fillers mentioned above. Therefore, the filler can be selected from a primary filler only, a secondary filler only, or a mixture of a primary filler and a secondary filler. Typical examples of filler agents include, but are not limited to, calcium carbonate, calcium sulfate dihydrate, calcium sulfate anhydrite, talc, glass microbubbles, mica, perlite, pyrophyllite, silica, calcium sulfate anhydrite, diatomaceous earth, clay (e.g., attapulgite, sepiolite, and kaolin), resin microspheres, and mixtures thereof. For set-type joint compounds, the filler agent is typically approximately 0.44% by weight to approximately 43% by weight of the dry-basis set-type joint compound. For premixed set-type joint compounds, the filler agent is typically approximately 0.989% by weight to approximately 55% by weight of the premixed set-type joint compound on a dry basis. Perlite or expanded perlite is a lightweight filler that can be used when the joint compound (whether dry-set, pre-mixed, or curing type) is preferably lightweight. The use of expanded perlite in a lightweight joint compound is taught in U.S. Patent No. 4,454,267, which is incorporated herein by reference. Expanded perlite is a very lightweight material containing many cracks and fissures. Perlite can be treated with a hydrophobic coating, for example, a silane or siloxane hydrophobic coating. For example, perlite can be treated according to the teachings of U.S. Patent No. 4,525,388 to Rehder et al., which is incorporated herein by reference, such that the material does not increase in weight due to water absorbed by capillary action.When used, the treated expanded perlite is preferably present at concentrations of at least 5% by weight on a dry basis in the joint compound. The expanded perlite may be treated with a hydrophobic coating, such as polydimethylsiloxane or other organofunctional silanes having the general formula R-SiCa, where R is selected from the group consisting of alkoxy and acetoxy compounds, such as acrylate, methacrylate, glycidoxy, epoxy propoxy, cyclohexyl epoxy, and vinyl, and X is selected from the group consisting of halogen, alkoxy, and acetoxy compounds. These silicones are hydrophobic film-forming compounds available as dispersions, emulsions, or solutions in organic or aqueous solvents. q Lcnnn / zznz / E / YiAi Any joint compound of the present invention optionally includes resin microspheres as a filler agent to be used in place of, or in addition to, expanded perlite in lightweight formulations. Preferred cover resins suitable for use in the present invention are homopolymers, copolymers, or mixtures of homopolymers and / or copolymers formed from one or more monomers of acrylonitrile (ACN), vinylidene chloride (VDC), or methyl methacrylate (MMA). Particularly preferred resins are polyacrylonitrile (PACN), polyvinylidene chloride (PVDC), copolymers formed from ACN and VDC, and copolymers formed from ACN, VDC, and MMA. The microspheres demonstrate high compressive strength without collapsing (non-friable) and can withstand the shear stress exerted (shear stability) from a typical gasket treatment manufacturing process and subsequent customer preparation. Binders Any binder suitable for use in a joint compound is appropriate for use in the present invention. The binder can improve the adhesion of the joint compound to its substrate, typically a gypsum board. Preferred binders are soft and flexible rather than extremely hard. Hard binders can create finer powder particles compared to flexible polymers. Examples of binders include, but are not limited to, polyvinyl acetate, polyvinyl alcohol, ethylene vinyl acetate copolymer, vinyl chlorides, vinyl acrylic copolymer, styrene acrylic, styrene butadiene, polyacrylamide, polyvinyl acrylic, latex emulsions, natural and synthetic starch, casein, and mixtures thereof. Vinyl acetate may also be absent. For dry-type joint compounds, binders can be included in approximately 1% by weight to approximately 15% by weight on a dry basis of the joint compound, preferably from approximately 1% by weight to approximately 10% by weight on a dry basis and, most preferably, from approximately 1% by weight to approximately 8% by weight on a dry basis. For curing-type joint compounds, binders can be included in approximately 0.5% by weight to approximately 8% by weight on a dry basis of the joint compound, preferably from approximately 1% by weight to approximately 8% by weight on a dry basis and, most preferably, from approximately 1% by weight to approximately 4% by weight on a dry basis. For premixed set-type joint compounds, the binders, when included, can be from approximately 0.1% by weight to approximately 8% by weight on a dry basis of the joint compound, preferably from 0.5% by weight to approximately 6% by weight on a dry basis and, most preferably, from approximately 1% by weight to approximately 4% by weight on a dry basis. For example, latex emulsion binders are often used in joint compounds (both drying and setting types) and may be included in the joint compounds of the invention. Examples include polyvinyl acetate, ethylene vinyl acetate, and vinyl acrylic emulsions. The amount used may vary from approximately 1.5% by weight to approximately 7% by weight on a dry basis of the joint compound, preferably from approximately 2% by weight to approximately 5.5% by weight on a dry basis. The weight ratio of the total filler agents to the total binders is preferably in the range of approximately 15:1 to approximately 5:1. The present invention may employ one or more latexes, for example, a single latex with no additional latex, or a combination of latexes whose respective glass transition temperatures may be the same or different. Each of the one or more latexes typically has a glass transition temperature in the range of less than 40°C, or less than 30°C, or less than 20°C, or less than 15°C, or less than 10°C, or less than 0°C, or less than -15°C. Each of the one or more latexes typically has a glass transition temperature greater than approximately -100°C, greater than approximately -80°C, greater than approximately -40°C, or greater than 10°C, for example, from approximately 15°C to less than 40°C. The compositions of the present invention may include mixtures comprising a first and a second binder.For example, the first binder may comprise a first polymer having a glass transition temperature equal to or greater than approximately -10°C. The second binder may comprise a second polymer having a glass transition temperature in the range of approximately -80°C to approximately 10°C. In the case of these two binders, the glass transition temperature of the first binder is at least approximately 5°C higher than the glass transition temperature of the second binder, and the first and second polymers have the same chemistry. However, the present invention preferably does not use combinations of either the first or second binder from the compositions in US patent 9,643,887 to Ayambem et al. Polymeric thickeners Polymeric thickeners are added to the joint compound of the present invention. After water is added to the composition, the thickener hydrates and swells, thereby thickening the joint compound. Thickeners are useful, for example, in helping to create the density and flow properties commonly associated with joint compounds. Preferably, the thickener is selected so that it hydrates substantially during the mixing process after water is added to the composition, with little or no hydration of the thickener after mixing is complete, to prevent lump formation in the joint compound. Examples of polymeric thickeners include, but are not limited to, ethylhydroxyethylcellulose, hydroxypropylmethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, cellulose-based gums (e.g., xanthan gum, gum arabic, alginate, pectin, and guar gums), and mixtures thereof. For dry-type joint compounds, polymeric thickeners can be included in approximately 0.05% by weight to approximately 3% by weight on a dry basis of the joint compound, preferably approximately 0.1% by weight to approximately 3% by weight on a dry basis, more preferably approximately 0.1% by weight to approximately 2% by weight on a dry basis, and most preferably approximately 0.5% by weight to approximately 2% by weight on a dry basis. For curing-type joint compounds, polymeric thickeners can be included in approximately 0.05 wt to approximately 2 wt on a dry basis of the joint compound, preferably from approximately 0.1 wt to approximately 2 wt on a dry basis and, most preferably, from approximately 0.1 wt to approximately 1 wt on a dry basis. For premixed set-type joint compounds, polymeric thickeners, when included, may be from 0.01% by weight to approximately 2% by weight on a dry basis of the joint compound, preferably from approximately 0.1% by weight to approximately 2% by weight on a dry basis and, most preferably, from approximately 0.1% by weight to approximately 1% by weight on a dry basis. Setting retarders Set retarders are included in premixed set-type joint compounds. Set retarders are optionally included in both dry-type and set-type joint compounds and are considered one of the additional additives in Tables 1 and 2. Set retarders (or set inhibitors) slow down the chemical setting of joint compounds in order to provide sufficient time to properly apply the joint compound before it hardens. Examples of setting retarders include, but are not limited to, polymer compositions comprising units of q Lcnnn / zznz / E / YiAi acrylic acid monomer and acrylamide (e.g., a copolymer (or a mixture of copolymers) of acrylic acid and acrylamide or a mixture of an acrylic acid homopolymer and an acrylamide homopolymer), as described in U.S. Patent No. 5,779,786, which is incorporated herein by reference. Additional examples of calcium-free phosphate setting retarders include, but are not limited to, zinc hexametaphosphate, potassium tripolyphosphate, tetrasodium pyrophosphate, sodium tripolyphosphate, monoammonium phosphate, and monobasic potassium phosphate, as described in U.S. Patent No. 5,746,822, which is incorporated herein by reference.Examples of set retarders include, but are not limited to, polymer compositions comprising polyacrylic acid and / or a salt of polyacrylic acid, as described in U.S. Patent No. 6,805,741, which is incorporated herein by reference. For premixed set-type joint compounds, set retarders may be included in approximately 0.001 wt. to approximately 2 wt. on a dry basis of the joint compound, preferably approximately 0.01 wt. to approximately 2 wt. on a dry basis, more preferably approximately 0.1 wt. to approximately 1 wt. on a dry basis, and most preferably approximately 0.25 wt. to approximately 0.75 wt. on a dry basis. q Lcnnn / zznz / E / YiAi For drying-type joint compounds and setting-type joint compounds, setting retarders, when included, may be from approximately 0.001% by weight to approximately 2% by weight on a dry basis of the joint compound, preferably from approximately 0.01% by weight to approximately 2% by weight on a dry basis, more preferably from approximately 0.1% by weight to approximately 1% by weight on a dry basis, and most preferably from approximately 0.25% by weight to approximately 0.75% by weight on a dry basis. Setting accelerators Setting accelerators are added to premixed, self-setting joint compounds at the time of use. Setting accelerators are optionally included in both drying-type and self-setting joint compounds and are considered one of the additional additives in Tables 1 and 2. Setting accelerators (or setting initiators or activators) accelerate and / or initiate the setting and / or drying of joint compounds. Examples of setting initiators include, but are not limited to, metallic salts that provide acidic cations, such as aluminum sulfate, potassium sulfate, calcium sulfate, ferric sulfate, ferric chloride, and mixtures thereof, as described in U.S. Patent No. 5,779,786, q Lcnnn / zznz / E / YiAi, which is incorporated herein by reference. Other examples of setting initiators include, but are not limited to, zinc sulfate, optionally in combination with iron oxide (for example, in a weight ratio of 19:1). Additional examples of setting initiators include, but are not limited to, zinc sulfate, aluminum sulfate, sulfuric acid, hydrochloric acid, sodium hydrogen sulfate, potassium hydrogen sulfate, aluminum potassium sulfate, calcium sulfate dihydrate, and mixtures thereof, as described in U.S. Patent No. 6,805,741, which is incorporated herein by reference. Setting initiators may also optionally include amine chelating agents. Setting initiators can be added to premixed set-type joint compounds, in a weight ratio to setting retarders of approximately 1.2:1 to approximately 6:1 and, preferably, from approximately 2:1 to approximately 6:1. When used, set initiators can be included or added to drying-type joint compounds and setting-type joint compounds at a weight ratio to set retarders of approximately 1.2:1 to approximately 6:1 and, preferably, from approximately 2:1 to approximately q Lcnnn / zznz / E / YiAi 6:1. Other additives Other additives that may be optionally included in joint compounds include, but are not limited to, preservatives, fungicides, bactericides, defoaming agents, glycols, wetting agents, and mixtures thereof. Lecithin may be added, but is typically absent. Other additives that may optionally be included in joint compounds include, but are not limited to, rheology modifiers, which may include surfactants, thickeners, dispersion aids, and / or additional dusting agents, such as a wax, oil, and / or polyethylene glycol. The plasticizers and additional dusting agents may work together to reduce airborne dust generation during sanding. When included, the amount of wax, oil, and / or polyethylene glycol used in a joint compound of the invention is preferably in the range of approximately 0.1 wt% to approximately 1 wt%, more preferably from 0.1 wt% to approximately 0.5 wt% on a dry basis of the joint compound. However, there is typically an absence of additional dusting agents other than plasticizer. Therefore, the plasticizing dusting agent is typically the only dusting agent in the compositions of the present invention. In other words, the plasticizers described herein as dusting agents are typically the only dusting agents in the compositions of the present invention. For example, there may be an absence of polyethylene glycol (e.g., polyethylene glycol wax). Typically, there is an absence of liquid mineral oils and solid waxes; an absence of dust-reducing additives such as oils, surfactants, solvents, waxes, and other petroleum derivatives; an absence of oils, such as mineral oils, vegetable oils, and animal oils, surfactants, oleoresinous mixtures, pitch, solvents, paraffins, waxes, including natural and synthetic waxes, glycols, and other petroleum derivatives; molasses; wax emulsions and polymer-coated wax core particles; and antistatic additives (e.g., as in US 2014 / 0275369 by Stewart et al.). In dry-type joint compounds, the other additives (in total) may be included up to 10% by weight, typically from approximately 0.01% by weight to approximately 10% by weight on a dry basis of the joint compound and, preferably, from approximately 0.1% by weight to approximately 10% by weight on a dry basis. In set-type joint compounds and premixed set-type joint compounds, the other additives (in total) may be included up to 10% by weight, typically from approximately 0.01% by weight to approximately % by weight on a dry basis of the joint compound, preferably from approximately 0.01% by weight to approximately 5% by weight on a dry basis and, most preferably, from approximately 0.1% by weight to approximately 1.0% by weight on a dry basis. Defoamers reduce or hinder the formation of air bubbles, which can form especially during mixing. Examples of defoamers include, but are not limited to, hydrocarbon-based defoamers, silica-based defoamers, and mixtures thereof. A glycol may be used in a joint compound to provide functional properties to the joint compound, such as wet edge, open time, drying time control, and freeze / thaw stability. Examples of glycols include, but are not limited to, diethyl glycol, ethylene glycol, propylene glycol, and mixtures thereof. When included, the amount of glycol used in a joint compound of the invention is preferably in the range of approximately 0.1 wt% to approximately 1 wt%, or 0.1 wt% to 0.5 wt%, or 0.1 wt% to 0.25 wt% on a dry basis of the joint compound. Clauses describing various characteristics of the products of the invention Clause 1. A gasket compound comprising: calcium sulfate hemihydrate and / or at least one filler agent, wherein a total amount of the at least one filler agent and / or calcium sulfate hemihydrate is at least approximately 50 percent by weight (% wt), preferably at least 75% by weight, of the dry-base (water-free) joint compound, preferably the filler agent comprising calcium carbonate, calcium sulfate dihydrate or calcium sulfate anhydrite, or a mixture thereof; a binder in up to approximately 15% by weight of the dry-basis joint compound; a polymeric thickener in up to approximately 3% by weight of the dry-basis joint compound; a plasticizing dusting agent in approximately 0.01 to approximately 3% by weight, or typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or more typically approximately 0.1 to approximately 0.5% by weight of the dry-base (water-free) joint compound; and an additive in up to approximately 10% by weight of the dry-base, dry-type joint compound. Clause 2. The joint compound of Clause 1, wherein the plasticizing dust-removing agent is approximately 0.05 to approximately 2% by weight of the dry-basis (water-free) joint compound. Clause 3. The joint compound of Clause 1, wherein the joint compound is a dry-type joint compound comprising the filler agent, wherein the filler agent comprises a primary filler agent in approximately 50 to approximately 98% by weight of the dry-basis joint compound and the filler agent comprises a secondary filler agent in 0 to approximately 25% by weight of the dry-basis joint compound, wherein the primary filler agent comprises or consists of any of calcium carbonate, calcium sulfate dihydrate, calcium sulfate anhydrite or a mixture thereof, and wherein the plasticizing dusting agent is in approximately 0.01 to approximately 3% by weight, typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or typically approximately 0.1 to approximately 0.5% by weight, preferably from approximately 0.5 to approximately 3% by weight, or more preferably from approximately 0.5 to approximately 2% by weight, or more preferably from approximately 0.7 to approximately 2% by weight, or more preferably from approximately 0.7 to approximately 1.5% by weight, of the joint compound in q Lcnnn / zznz / E / YiAi dry basis. Clause 4. The joint compound of Clause 1, wherein the joint compound is a dry-type joint compound comprising joint compound components and water, wherein the joint compound components comprise the filler, binder, polymer thickener, plasticizing dust-removing agent, and additive, wherein: the filling agent comprises a primary filling agent in approximately 50 to approximately 98% by weight of the dry-base, dried-type joint compound, wherein the primary filling agent comprises one selected from the group consisting of calcium carbonate, calcium sulfate dihydrate, and calcium sulfate anhydrite, and a mixture thereof; the filler agent comprises a secondary filler agent in up to approximately 25% by weight of the dry-base, dry-type joint compound; wherein the primary filler and the secondary filler each amount to a total of at least approximately 75% by weight on a dry basis; the binder is approximately 1 to approximately 15% by weight of the dry-type joint compound based on q Lcnnn / zznz / E / YiAi dry; The polymeric thickener is approximately 0.05 to approximately 3% by weight of the dry-baked type joint compound; The plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, typically approximately 0.05 to approximately 2% by weight, or typically approximately 0.1 to approximately 1% by weight, or typically approximately 0.1 to approximately 0.5% by weight, or typically approximately 0.3 to approximately 3% by weight, or preferably approximately 0.5 to approximately 3% by weight, more preferably approximately 0.5 to approximately 2% by weight, or more preferably approximately 0.7 to approximately 2% by weight, or, most preferably, approximately 0.7 to approximately 1.5% by weight, of the dry-basis joint compound; and the additive is up to approximately 10% by weight of the dry-basis, dry-type joint compound; and wherein the water is in a water-to-joint-compound weight ratio of approximately 1:3 to approximately 3:1. Clause 5. The joint compound of Clause 1, wherein the joint compound is a curing-type joint compound comprising calcium sulfate hemihydrate, q Lcnnn / zznz / E / YiAi, wherein the plasticizing dusting agent is from approximately 0.05 to approximately 2% by weight or from approximately 0.1 to approximately 2% by weight or from approximately 0.5 to approximately 2% by weight of the dry-basis joint compound. Clause 6. The joint compound of Clause 1, wherein the joint compound is a curing-type joint compound, wherein: Calcium sulfate hemihydrate is approximately 20 to approximately 99% by weight of the dry-setting type joint compound; the filler agent is approximately 0.44 to approximately 43% by weight of the dry-setting type joint compound; The total calcium sulfate hemihydrate and filler agent is approximately 63% by weight to approximately 99.44% by weight of the dry-setting type joint compound; the binder is approximately 0.5 to approximately 8% by weight of the dry-setting type joint compound; The polymeric thickener is approximately 0.05 to approximately 2% by weight of the dry-setting type joint compound; The plasticizing dusting agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-based (water-free) joint compound; and the additive is up to approximately 10% by weight of the dry-based curing-type joint compound. Clause 7. The joint compound of Clause 1, wherein the joint compound is a set-type, premixed joint compound, wherein the plasticizing dust-removing agent is approximately 0.05 to approximately 2% by weight of the dry-basis (water-free) joint compound. Clause 8. The joint compound of Clause 1, wherein the joint compound is a premixed, set-type joint compound comprising joint compound components and water, wherein the joint compound components comprise calcium sulfate hemihydrate, binder, polymer thickener, plasticizing dust-removing agent, additive, a set retarder, and, if present, a filler, wherein: Calcium sulfate hemihydrate is approximately 20 percent by weight (% by weight) to approximately 99% by weight q Lcnnn / zznz / E / YiAi of the dry-baked pre-setting type joint compound; the filler agent is approximately 0.989% by weight to approximately 55% by weight of the dry-baked, premixed, set-type joint compound; The total calcium sulfate hemihydrate and filler agent is approximately 75% by weight to approximately 99.989% by weight of the premixed dry-basis set joint compound; The setting retarder is approximately 0.001 to approximately 2% by weight of the dry-baked, premixed, set-type joint compound; the binder is up to approximately 8% by weight of the dry-baked, pre-setting type joint compound; The polymeric thickener is up to approximately 2% by weight of the dry-baked, pre-setting type joint compound; The plasticizing dust-removing agent is approximately 0.01 to approximately 3% by weight, preferably approximately 0.05 to approximately 2% by weight, with greater preference approximately 0.1 to approximately 1% by weight, with maximum preference approximately 0.1 to approximately 0.5% by weight, of the dry-basis joint compound; the additive is up to approximately 10% by weight of the dry-basis premixed set-type joint compound; and water is in a water-to-joint-compound ratio of approximately 1:3 to approximately 3:1. Clause 9. The joint compound of Clause 4, wherein the joint compound is the dry-type joint compound and comprises: the primary filler agent is from approximately 65% ​​by weight to approximately 93% by weight of the dry-type joint compound on a dry basis, wherein more than half of the primary filler agent is calcium carbonate in % by weight on a dry basis; the secondary filler agent is approximately 3% by weight to approximately 25% by weight of the dry-baked type joint compound; The primary filler and secondary filler are present as at least approximately 75% by weight of the dry-basis joint compound; the binder is approximately 1% by weight to approximately 10% by weight of the dry-base type joint compound; the polymeric thickener in approximately 0.1% by weight to approximately 2% by weight of the dry-basis type joint compound q Lcnnn / zznz / E / YiAi; the plasticizing dusting agent in approximately 0.5% by weight to approximately 1% by weight, or preferably from approximately 0.7% by weight to approximately 1% by weight of the dry-baked type joint compound; the additive in approximately 0.01% by weight to approximately 10% by weight of the dry-type joint compound on a dry basis; and the water in the ratio of water to joint compound components of approximately 1:3 to approximately 1:1. Clause 10. The joint compound of Clause 4, wherein the joint compound is the dry-type joint compound and comprises: the primary filler agent is from approximately 50% by weight to approximately 93% by weight of the dry-base type joint compound, wherein the primary filler agent is calcium sulfate dihydrate; the secondary filler agent is approximately 3% by weight to approximately 25% by weight of the dry-baked type joint compound; The primary filler and secondary filler are present as at least approximately 75% by weight of the dry-basis joint compound; q Lcnnn / zznz / E / YiAi the binder in approximately 1% by weight to approximately 10% by weight of the dry-type joint compound on a dry basis; the polymeric thickener in approximately 0.1% by weight to approximately 2% by weight of the dry-baked type joint compound; the plasticizing dusting agent in approximately 0.5% by weight to approximately 1% by weight, or preferably from approximately 0.7% by weight to approximately 1% by weight of the dry-base, dry-type joint compound; and the additive in approximately 0.01% by weight to approximately 10% by weight of the dry-base, dry-type joint compound; and water in the ratio of water to joint compound components of approximately 1:3 to approximately 1:1. Clause 11. The joint compound of Clause 6, wherein the joint compound is the curing-type joint compound and comprises: calcium sulfate hemihydrate in approximately 60% by weight to approximately 85% by weight of dry-setting type joint compound; the filler agent in approximately 13.7% by weight to approximately 29% by weight of the dry-setting type joint compound q Lcnnn / zznz / E / YiAi; The total calcium sulfate hemihydrate and filler agent is 89 to 98.7% by weight of the dry-setting type joint compound, the binder is approximately 1% by weight to approximately 4% by weight of the dry-setting type joint compound; the polymeric thickener in approximately 0.1% by weight to approximately 1% by weight of the dry-setting type joint compound; the plasticizing dusting agent in approximately 0.1% by weight to approximately 1% by weight of the dry-setting type joint compound; and the additive in approximately 0.1% by weight to approximately 5% by weight of the dry-setting type joint compound. Clause 12. The joint compound of Clause 8, wherein the joint compound is the premixed setting-type joint compound and comprises: calcium sulfate hemihydrate in approximately 60% by weight to approximately 85% by weight of the premixed dry-basis set-type joint compound; the filler agent is approximately 14.6% by weight to approximately 28% by weight of the dry-baked, premixed, set-type joint compound; the total calcium sulfate hemihydrate and filler agent is 88 to 99.6% by weight of the dry-base pre-setting joint compound, the set retarder is from approximately 0.1% by weight to approximately 1% by weight of the dry-base pre-mixed pre-setting joint compound, and the binder is up to approximately 4% by weight of the dry-base pre-mixed pre-setting joint compound; the polymeric thickener in approximately 0.1% by weight to approximately 1% by weight of the premixed dry-basis set-type joint compound; the plasticizing dusting agent in approximately 0.1% by weight to approximately 1% by weight of the premixed dry-basis pre-setting joint compound; the additive in approximately 0.1% by weight to approximately 5% by weight of the premixed dry-basis set-type joint compound; and the water in the ratio of water to joint compound components of approximately 1:3 to approximately 1:1. Clause 13. The joint compound of any of Clauses 1 to 12, wherein the plasticizing dusting agent comprises one or more glycol dibenzoates. q Lcnnn / zznz / E / YiAi Clause 14. The joint compound of any of Clauses 1 to 12, wherein the plasticizing dusting agent comprises diethylene glycol dibenzoate and / or dipropylene glycol dibenzoate. Clause 15. The joint compound of any of Clauses 1 to 12, wherein the plasticizing dusting agent comprises diethylene glycol dibenzoate. Clause 16. The joint compound of any of Clauses 1 to 12, wherein the plasticizing dust-removing agent is present in from approximately 0.01% by weight to approximately 1% by weight, typically from approximately 0.01% by weight to approximately 0.5% by weight, of the dry-basis joint compound. Clause 17. The joint compound of any of Clauses 1 to 16, wherein the plasticizing dusting agent is the sole dusting agent. Clause 18. The joint compound of any of Clauses 1 through 17, wherein the plasticizing dust-removing agent is approximately 0.3 to approximately 3% by weight, typically approximately 0.5 to approximately 3% by weight, more preferably approximately 0.5 to approximately 2% by weight, or approximately 0.7 to approximately 2% by weight, or approximately 0.7 to approximately 1.5% by weight, of the joint compound on a dry basis. Clause 19. The joint compound of any of Clauses 1 to 18, wherein the joint compound exhibits a mud-like appearance and hardens when exposed to air, the hardened joint compound can be smoothed by sanding and generates dust when sanded. Clause 20. The joint compound of Clause 19, wherein the plasticizing dust-removing agent is present in the joint compound in such an amount that the amount of airborne dust generated when sanding the hardened joint compound is less than the amount of airborne dust generated when sanding the same hardened joint compound in the absence of the plasticizing dust-removing agent. Clause 21. A method for using the joint compound of any of Clauses 1 to 20, comprising applying the joint compound to plates, joint tape and / or other layer of joint compound. Clause 22. A method for preparing the joint compound of any of Clauses 1 to 19, comprising combining calcium sulfate hemihydrate and / or at least one filler, binder, polymer thickener, plasticizing dust-removing agent and additive. Clause 23. The method of Clause 22, wherein the joint compound results from the combination of calcium sulfate hemihydrate and / or at least one filler, binder, polymer thickener, plasticizing dusting agent, and wherein the additive has a mud-like appearance and hardens when exposed to air, wherein the hardened joint compound produces airborne dust when sanded, wherein the plasticizing dusting agent is present in the joint compound in such an amount that the amount of airborne dust generated when sanding the hardened joint compound is less than the amount of dust generated when sanding the same hardened joint compound in the absence of the plasticizing dusting agent. Clause 24. The method of Clause 22, wherein the joint compound resulting from the combination of the plasticizing dust-removing agent; calcium sulfate hemihydrate and / or at least one filler agent; the binder; the polymeric thickener and the additive hardens when exposed to air, wherein the hardened joint compound produces airborne dust when subjected to sanding to remove a quantity of the hardened joint compound, wherein the joint compound generates less airborne dust than a joint compound having the same composition except for an absence of the plasticizer when subjected to sanding to remove the same quantity of the hardened joint compound. EXAMPLES In the examples provided herein, as mentioned above, the percentages of product compositions or formulas are expressed as weight percentages, unless expressly stated otherwise. Reported measurements are also approximate quantities unless expressly stated, for example, percentages, weights, temperatures, approximate distances, or other properties. Example 1 The joint compounds were produced according to Table 4. The dusting agent in Formulations 1, 2, and 3 was a plasticizer (Plasticizer 1), namely a mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate. The dusting agent in Formulation 4 was a plasticizer (Plasticizer 2), namely dipropylene glycol dibenzoate. The Control contained no plasticizer. Except for the water-to-joint compound ratio, all component quantities in Table 4 are given as a percentage of dry weight (without water). q Lcnnn / zznz / E / YiAi Table 4. Example formulations Component Control Formulation 1 Formulation 2 Formulation 3 Formulation 4 Calcium Carbonate (% wt dry basis) 79.7 79.6 79.4 78.7 79.6 Plasticizer 1 (% wt dry basis) 0 0.1 0.3 1.0 - Plasticizer 2 (% wt dry basis) - - - - 0.3 Rheology-Modifying Clays (% wt dry basis) 4.4 4.4 4.4 4.4 4.4 Uncoated Perlite (% wt dry basis) 9.6 9.6 9.6 9.6 9.6 Latex emulsion binder (% by weight on a dry basis) (includes water and solids) 4.6 4.6 4.6 4.6 4.6 PVA binder (% by weight on a dry basis) 0.3 0.3 0.3 0.3 0.3 Cellulosic thickeners (% by weight on a dry basis) 0.9 0.9 0.9 0.9 0.9 Other additives* (% by weight on a dry basis) 0.5 0.5 0.5 0.5 0.5 Water (weight ratio of water to joint compound components) 4:5 4:5 4:5 4:5 4:5 q Lcnnn / zznz / E / YiAi *includes biocide A plasticizing dust-removing agent was used at various concentrations by mixing premixed joint compound in a Hobart mixer. The plasticizing dust-removing agent was added to the base formulation and compared to a control compound. The material was sanded using a robotic sanding device. Dust removal capacity was evaluated by measuring airborne dust using a time-weighted average and a dust measurement protocol. The dust measurement protocol involved using a robotic sanding device to apply a controlled amount of force to the joint compound sample via a sanding member as its sanding surface sanded the joint compound sample along a predetermined sanding path. Specifically, the robotic sanding device was a system described in the published patent application. The force acted along a normal axis that is substantially perpendicular to the sanding axis. In particular, the robotic sanding device applied a pneumatic air pressure of 1.38 bar (20 psig) was applied to the sanding surface to approximate a typical force a worker would use to apply sandpaper to sand joint compound during sanding. The test was conducted for 40 seconds, during which there were approximately 26 cycles of the oscillating arm to sand until the paper on the plate became visible. The oscillating robotic sanding arm starts 10 cm (4 in) from the bottom of the 81 cm (32 in) plate and stops 10 cm (4 in) from the top of the plate; therefore, 0.5 cycles is 61 cm (24 in). Thus, each cycle has an upward stroke of 61 cm (24 in) and a downward stroke of 61 cm (24 in). Therefore, the total travel distance of the robotic sanding arm during 26 cycles was 31.7 m (1248 in, 104 ft). The level of airborne dust generated by this test was quantified by a DUST TRAK II device positioned 1.86 m (6 ft) from the sample, with its inlet nozzle approximately 0.91 m (3 ft) above the floor. The device was placed at a constant height of 0.91 m (3 ft) above the floor in a sealed room containing the test sample and the robotic sanding device. The DUST TRAK II was a light-scattering laser photometer that provided real-time aerosol mass readings and collected a gravimetric sample. However, the aerosol mass measurement device could have been any suitable equipment configured to measure the amount of airborne dust particles.For example, the aerosol mass measuring device could have been any laser photometer configured to provide real-time aerosol mass readings that could be converted to a time-weighted average using the dust control measurement protocol described above. The DUST TRAK II device measured the average airborne dust concentration over a 15-minute interval from the start of sanding. The results for the joint compound of the invention were compared to a control compound without (additional) dedusting agent. For the purposes of this example and description, airborne dust included dust particles smaller than ten microns. In Formulation 3, the dedusting agent Plasticizer 1 was used at 1% by weight of the total composition on a dry basis (without water), and the level of airborne dust (average airborne dust concentration (mg / m3)) generated was reduced by 56% compared to the control. This reduction in airborne dust is referred to as the dedusting efficiency. In Formulations 2 and 4, the plasticizing dedusting agent was reduced to 0.3% on a dry basis, and the airborne dust generated was reduced by 24% for the mixture of Plasticizer 1 at 0.3% (on a dry basis) of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate. and by 17% for 0.3% (dry basis) of Plasticizer 2 dipropylene glycol alone, respectively, compared to the control. In Formulation 1, the dusting agent Plasticizer 1 was reduced to 0.1% on a dry basis and reduced the airborne dust generated by 10% compared to the control. Figures 1 and 2 show the results for the premixed, dry-type joint compound formulations discussed above, containing either Plasticizer 1 or Plasticizer 2. Figures 1 and 2 also indicate the standard deviation of the measured values ​​for these results. Each reported result is the average of three runs of the dusting protocol. Figure 1 is a graph of the average concentration of dust in the air (mg / m3) produced from each of the samples mentioned above with the mixture of Plasticizer 1, diethylene glycol dibenzoate, propylene glycol dibenzoate and dipropylene glycol dibenzoate, and the sample with Plasticizer 2 of dipropylene glycol dibenzoate. q Lcnnn / zznz / E / YiAi Figure 2 is a graph of the dusting efficiency discussed above in relation to the control for each sample in Figure 1. Although particular versions of the invention have been shown and described, those skilled in the art will understand that changes and modifications can be made to these without departing from the invention in its broader aspects, as indicated in the following claims. It is hereby stated that, as of this date, the best method known to the applicant for putting the aforementioned invention into practice is the one that is clear from the present description of the invention.

Claims

1. A joint compound characterized in that it comprises: calcium sulfate hemihydrate and / or at least one filler, wherein the total amount of calcium sulfate hemihydrate and / or the at least one filler is at least approximately 50 percent by weight (wt. %), a binder in up to approximately 15 wt. of the dry-basis joint compound; a polymeric thickener in up to approximately 3 wt. of the dry-basis joint compound; a plasticizing dust-removing agent in from approximately 0.01 to approximately 3 wt. of the dry-basis (water-free) joint compound; and an additive in up to approximately 10 wt. of the dry-basis, dry-type joint compound.

2. The joint compound according to claim 1, characterized in that the plasticizing dust-removing agent is approximately 0.05 to approximately 2% by weight of the dry-basis (water-free) joint compound.

3. The joint compound according to claim 1, characterized in that it is a dry-type joint compound comprising the filler agent, wherein the filler agent comprises a primary filler agent comprising from approximately 50 to approximately 98% by weight of the dry-based joint compound and a secondary filler agent comprising from 0 to approximately 25% by weight of the dry-based joint compound, wherein the primary filler agent comprises any of calcium carbonate, calcium sulfate dihydrate, calcium sulfate anhydrite or a mixture thereof, and wherein the plasticizing dusting agent comprises from approximately 0.5 to 3% by weight of the dry-based joint compound.

4. The joint compound according to claim 1, characterized in that it is a setting-type joint compound comprising calcium sulfate hemihydrate, wherein the plasticizing dust-removing agent is approximately 0.05 to approximately 2% by weight of the dry-basis joint compound.

5. The joint compound according to claim 1, characterized in that it is a set-type and premixed-type joint compound, wherein the plasticizing dust-removing agent is approximately 0.05 to approximately 2% by weight of the dry-basis (water-free) joint compound.

6. The gasket compound according to claim 1, characterized in that the plasticizing dusting agent comprises one or more glycol dibenzoates.

7. The joint compound according to claim 1, characterized in that the plasticizing dusting agent comprises diethylene glycol dibenzoate and / or dipropylene glycol dibenzoate.

8. The joint compound according to claim 1, characterized in that the plasticizing dusting agent is the only dusting agent.

9. A method for using the joint compound according to any of claims 1 to 8, characterized in that it comprises applying the joint compound to plates, joint tape and / or other layers of joint compound.

10. A method for preparing joint compound according to any of claims 1 to 8, characterized in that it comprises combining calcium sulfate hemihydrate and / or at least one filler agent, binder, polymer thickener, plasticizing dust-removing agent and additive.