Wallpaper pastes

Wagner equation Wagner number Wakamatsu reaction Waldhof fermentor Walkman Wallace plasticity Wallach procedure Wall baffles Wallboard Wall geometries Wallpaper paste Wallpaper pastes Wallpapers Wall plaster Walnut oil... 

Cellulosics. CeUulosic adhesives are obtained by modification of cellulose [9004-34-6] (qv) which comes from cotton linters and wood pulp. Cellulose can be nitrated to provide cellulose nitrate [9004-70-0] which is soluble in organic solvents. When cellulose nitrate is dissolved in amyl acetate [628-63-7] for example, a general purpose solvent-based adhesive which is both waterproof and flexible is formed. Cellulose esterification leads to materials such as cellulose acetate [9004-35-7], which has been used as a pressure-sensitive adhesive tape backing. Cellulose can also be ethoxylated, providing hydroxyethylceUulose which is useful as a thickening agent for poly(vinyl acetate) emulsion adhesives. Etherification leads to materials such as methylceUulose [9004-67-5] which are soluble in water and can be modified with glyceral [56-81-5] to produce adhesives used as wallpaper paste (see Cellulose esters Cellulose ethers). 

Nonfood Uses. Native com starch is principally used in nonfood appHcations in mining, adhesives, and paper industries. Pregelatinized starch is chemically unmodified, but it is physically modified. Pregelatinized starches are used to decrease water losses in oil-weU drilling muds, in cold water-dispersable wallpaper pastes, and in papermaking as an internal fiber adhesive. 

Trimethyl arsine [593-88-4] C H As, has been identified as the toxic volatile arsenical, once known as "Gosio gas," produced by the reaction of certain molds that grow on wallpaper paste and react with inorganic arsenic compounds present in the paper. A number of microorganisms can methylate arsenic trioxide and other arsenic-containing compounds to yield trimethylarsine. These microorganisms include Scopulariopsis brevicaulis Candida humicola and Gliocladium roseum (72). 

Starch glues are water dispersions for libraiy paste and wallpaper paste. They coat paper for better receptivity of inks and keep the inks held out on the paper surface. They are also used in corrugated cardboard and paper laminating. 

Since n is less than unity, the apparent viscosity decreases with the deformation rate. Examples of such materials are some polymeric solutions or melts such as rubbers, cellulose acetate and napalm suspensions such as paints, mayonnaise, paper pulp, or detergent slurries and dilute suspensions of inert solids. Pseudoplastic properties of wallpaper paste account for good spreading and adhesion, and those of printing inks prevent their running at low speeds yet allow them to spread easily in high speed machines. 

In general, these groups of cellulose ethers have been used for their innate adhesive properties and to provide thickening to adhesive formulations. They are used for plywood adhesives, industrial adhesives, wallpaper paste, library paste, and latex adhesives. For example, methylcellulose is used in some adhesives as an additive to control viscosity, especially in the heat-cure phenol-formaldehyde glues and other hot-pressing adhesives. Hydroxyethylcellulose is used as an ingredient in polyvinyl acetate emulsions, where it acts as a thickener and protective colloid. 

Vinyl acetate monomer (VAM) is an important chemical intermediate used in the production of several types of paints, adhesives as wallpaper paste and wood glue, and surface coatings such as the protective laminate films in automotive safety glass [2,104,237,238]. 

Wood glue, wallpaper paste, labelling adhesive, metal adhesive as reference to a certain purpose of use. 

The basic substance of wallpaper paste is cellulose (wood component) that, with regard to the required processing properties (water solubility, strength, removability as the case may be) is chemically modified. 

Type of adhesive Adhesives based on different adhesive raw materials with special processing properties (e.g., hot-melt adhesives, pressure-sensitive adhesives), different purposes of use (e.g., wallpaper paste, wood glue), processing temperatures (e.g., cold glue, heat-curing adhesives), availabilities (e.g., adhesive films, solvent-based adhesive). 

Fungicides Many wallpaper pastes contain fungicides. 

MAJOR USES Used in agriculture as a fungicide used in the production of cosmetics, phannaceuticals, oil-based paints, lacquers, wallpaper paste, plasticizers, polyethylene, vinyl, rubber stabilizers, textiles, bacteriostatic agent in soaps, dermatological anti-infective. 

Uses Dispersant, vise, stabilizer for paints, adhesives, cauiks, wallpaper pastes... 

Uses Fungicide, mildeweide for waterborne pigmented stains (nonwood), adhesives, glues, starch or cellulosic based wallpaper pastes, waterborne industrial and architectural coalings, textile preps. 

Uses Preservative for dry mix coatings, wallpaper pastes, thickeners, plasters, or any prod, hydrated and stored at pt. of use for food contact Features In-can preservation stable to 60 C act. against bacteria, yeasts, and molds... 

PVPA/A 1-335 PVP/VA 1-535 PVP/VA 1-735 viscosity stabilizer, wallpaper pastes Drewsperse 470... 

Wallpaper paste Pseudoplastic and Visco-elastic Good spreadabihty and adhesive properties... 

This is the sort of adhesion given by such materials as contact and impact adhesives, wallpaper paste and tapes etc. 

Adhesives Wallpaper paste Adhesion promoter, water-binder... 

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