Abstract:
An improved composition is disclosed for use in aqueous solution in the bleaching and/or sanitizing of fabrics. The composition comprises a polychlorinated cyanurate, which in aqueous solution provide a source of available bleaching and sanitizing chlorine; and an inhibiting system for inhibiting the activity of available chlorine from said polychlorinated cyanurate to a level beneath a predetermined fabric or fabric dye degradation level, when the concentration of said polychlorinated cyanurate is at or above saturation with respect to the aqueous solvent. The inhibiting system comprising cyanauric acid, and one or more additional salts which function to bring a 50% aqueous solution/suspension of the composition to a pH in the range of 6.1 to 7.6.
Abstract:
A method for pre-spotting fabric garments to facilitate removal of stains and soils upon subsequent laundering or dry cleaning, comprising contacting the stained or soiled areas of said garment with a composition comprising a non-ionic aqueous carrier; from about 5 to 50 parts by weight of a non-ionic amide surfactant; frm 0.5 to 50 parts by weight of a humectant; and a sufficient concentration of an anti-wicking agent to preclude wicking upon the said composition being subjected to the Standard Migration Test as heretofore defined.
Abstract:
A method and apparatus for producing a puffed borax product having superior particle strength and improved uniformity of hydration and puff ratio. In the method particles of borax having a given particle size distribution are introduced into a downwardly flowing slowly moving laminar air stream in a vertical tower, as a horizontally dispersed sheet of particles. The air stream is heated sufficiently to remove part of the water of hydration without fusing the borax. The borax particles, carried by the air stream, are gravitationally separated downstream, and are found to have a more uniform puffing ratio, i.e. feed particles of different sizes are puffed more proportionally than in prior art processes.An apparatus for carrying out this method is also disclosed, which comprises a vertical tower with an input for heated air and an opening in the wall of the tower through which the borax feed is introduced as a dispersed sheet. The borax feed is introduced by one or more rotating horizontal wheels having vanes which disperse the particles through the opening into the moving air stream as a sheet of particles, which are carried along by the air stream and are separated gravitationally downstream from the point of entry.
Abstract:
According to the invention, in a process for agglomerating a mass of particulates containing hydratable or hydrated inorganic salts wherein the particulates are sprayed with a silicate solution to form agglomerates and the resulting agglomerates are subjected to an aging/drying step to allow hydration equilization and excess water evaporation, the improvement comprises replacing a portion of the particulates with puffed borax as an agglomerating aid to minimize aging/drying time.
Abstract:
A method for pre-spotting fabric garments to facilitate removal of stains and soils upon subsequent laundering or dry cleaning, comprising contacting the stained or soiled areas of said garment with a composition comprising a non-ionic aqueous carrier; from about 5 to 50 parts by weight of a non-ionic amide surfactant; from 0.5 to 50 parts by weight of a humectant; and a sufficient concentration of an anti-wicking agent to preclude wicking upon the said composition being subjected to the Standard Migration Test as heretofore defined.
Abstract:
Improved blowing agents for thermoplastic and thermoset polymers are disclosed which contain silicate based compounds containing from about 5 to about 40% water and which expand or intumesce when heated to at least about 5 times their initial volume, which blowing agents are highly effective, predictable, stable and microwave receptive, do not cause post-blow, and which also act as an initiator or accelerator for other organic blowing agents.
Abstract:
A method of producing dense, free-flowing alkali metal silicate-based particles which, when sufficiently heated, will form lightweight particles of a spumiform nature which may be employed as thermal or acoustical insulation or as a lightweight filler for gypsum or cement or for numerous other purposes. The method comprises premixing a liquid alkali metal silicate with selected fillers and/or insolubilizers, adjusting the temperature and solids content of the mixture until it passes into a dilatant gel state which will fracture when extended at a rate of between about 3 and 95 cm/minute, and subsequently extruding or pelletizing the gel at this temperature to form particles which are conditioned in an air stream for at least one second and then dried to a moisture level of between about 5 and 30%. These particles or pellets serve as a stable intermediate which can be expanded to form lightweight spumiform particles by further heating at a later time or at a remote location.
Abstract:
Processing aids comprising amorphous particulate silicates containing from about 2% to about 50% water, are utilized in processes for compounding thermoplastic resins, allowing higher levels of additives to be more effectively incorporated into the thermoplastic resins. The processing aids allow greater dispersion of pigments and other additives in compounded thermoplastic resins and concentrates.
Abstract:
A method is provided for producing dense, free-flowing and non-caking alkali metal silicate-based particles which are heat expandable into lightweight particles of a spumiform character. Pursuant to the invention, one provides at a selected temperature a dilatant aqueous gel comprising an alkali metal silicate as the majority non-aqueous component, the silicate being present in the gel in a dissolved state; and the non-aqueous content of the gel being in the range of from about 38 to 65% (w/w). Shearing forces are imposed upon the gel which exceed the flow response characteristics of the gel, whereby the viscosity of the gel becomes sufficiently high to cause a discontinuity in the gel, resulting in disruption into discrete particles. The discrete particles are conditioned while being maintained as separate entities to thereby form a skin on the particles so that they will not agglomerate or coalesce with one another. The conditioned particles are dried to form particles having about a 5 to 40% (w/w) moisture level.
Abstract:
Methods and additives for purging thermoplastic extruders and associated apparatus are included which involve the addition of a purging additive to a follower thermoplastic resin which additive when heated causes the follower resin to froth as it passes through the unit, the passage of frothed resin thereby causing the removal of the contents of the unit, which contents includes resident resin along with resident additives, degraded materials and any other undesired materials which may be present in the unit.