A paint system comprising a first component and a second component wherein said first and second components are separate compositions, wherein said first component is a removable paint composition comprising: (i) an organic solvent component comprising or consisting of one or more organic solvent(s); (ii) a polymeric component comprising a polymeric binder; (iii) a pigment component; and (iv) optionally one or more acid(s), and wherein said second component is a remover composition for removing said first component from a surface of a substrate wherein said remover composition comprises: (i) water and (ii) a base.

Described herein are one-component spray foam compositions having a low post post-expansion rate. Also described herein are methods of making and using one-component spray foam compositions having a low post-expansion rate. Also described herein are dispensers for dispensing the one-component spray foam compositions having a low post-expansion rate. Compositions and methods in accordance with the present disclosure are useful in a wide variety of applications, and are particularly useful in construction applications.

The invention relates to a solvent system, which consists of a liquid present in the cup of an aerosol can filling device, said cup having functionally connected thereto mechanized color paste dispensing elements which enable dispensing into the filling device's cup one color paste in an amount A, which is at least A.sub.min, as well as of an aerosol base paint present in the aerosol can. The solvent system comprises:the liquid present in the cup of an aerosol can filling device, which liquid occupies a volume V1 of a filling volume V2 of the cup and which liquid comprises a color paste mixture and additionally possibly also water and a binder, said color paste mixture having been produced into the cup by dispensing into the cup, with mechanized dispensing elements, individual color tone pastes which make up a tint of said color paste mixture, in a ratio defined by a color tone recipe for said color paste mixturethe aqueous aerosol base paint present in an aerosol can with a filling volume V, which base paint, as a liquid under pressure, occupies a total volume Vt=VV2 of said aerosol can filling volume V, whereby said aerosol base paint in liquid form under pressure comprises a water-compatible solvent 20-60% by volume, a binder 20-60% by volume, and a propellant 30-60% by volume, preferably 35-45% by volume, and wherein the solvent system has the minimum amount A.sub.min of the color paste mixture, as well as a total amount A.sub.tot of the color paste mixture, adapted to depend on the aggregate amount of a binder in the aerosol can as well as a binder in the cup.

The invention relates to a water based paint composition to be used in a pressurized and sealed aerosol can and which composition contains A) up to 24% w/w of propellant gas which is dimethyl ether (DME); B) up to 76% w/w of coating material, consisting nonvolatile content in the range of 65-95% w/w and volatile content in the range of 5-35% w/w;which volatile content contains water up to 0-100% w/w and additives, co-solvents and dispersing agents which comprise altogether of 0-9% w/w of volatile liquids, having 0-10% w/w preferably less than 5% w/w of volatile organic compounds (VOC) provided that the aggregate amount of dimethyl ether (DME) and the volatile organic compounds (VOC) in volatile liquids is such that VOC concentration is below 186 g/l (responding about 24% w/w, calculated as DME). In the present invention the nonvolatile content comprises color pigments and possible fillers in the range of 0-30% w/w, polyurethane modified alkyd resin or alkyd resin in the range of 25-99% w/w preferably in the range of 35-90% w/w and additives up to 9% w/w, which resin is present as an emulsified dispersion in water miscible solvent comprising water and dimethyl ether (DME).

Described herein are processes for producing cold-flexible polyurethane insulation, in which (a) polyisocyanates are mixed with (b) compounds having groups which are reactive to isocyanates, (c) blowing agents, (d) catalysts, (e) plasticizers and optionally (f) further additives to give a reaction mixture and the mixture is applied to a surface and cured to form insulation. Also described herein is a polyurethane insulation obtainable by a process described herein.

A multi-layer coating with antibacterial and anti-COVID properties which is usable in various environments, including hospitals, and which can be easily deposited by spraying on different surfaces and capable of providing an effective removable barrier against pathogens and bacteria, which waterproof coating is characterized in that it uses graphene nanoparticles as an antibacterial and anti-COVID agent deposited by spraying a polymer material as a host layer on the surface to promote the dispersion and uniform surface distribution thereof, the polymer material being directly adhered by spraying to the surface to be coated or sprayed on a second polymer, in turn sprayed on the surface to be coated, which is used as an element to promote the adhesion of the first polymer forming the antibacterial and anti-COVID coating to the surface to be coated.

The invention is a system and method for reinforcing an existing wall structure to support hanging a load from a wall. By employing a solidifiable fire-retardant composition adapted to solidify inside a hollow wall structure, a structural support may be formed to provide a suitable support structure for hanging a medium to heavy load in lieu of an unavailable stud. In exemplary embodiments, a method may include the steps of (a) forming an aperture on a wall panel, the aperture providing access through a front surface of the wall panel to a cavity behind a back surface of the wall panel; (b) applying, inside the cavity, a solidifiable fire-retardant composition adapted to solidify inside the cavity through the aperture; (c) allowing the fire-retardant composition to solidify inside the cavity; and (d) anchoring one or more wall fasteners to the wall panel and to the solidified fire-retardant composition inside the cavity.

Disclosed is a method of reducing the lambda aging of a polyurethane foam, a polyisocyanurate foam or a mixture thereof comprising producing the foam from a foamable composition comprising an isocyanate and a polyol premix composition comprising a polyol or mixture of polyols, a blowing agent selected from the group consisting of 1,3,3,3-tetrafluoropropene (1234ze), 1,1,1,4,4,4-hexafluorobut-2-ene (1336mzzm) and/or 1-chloro-3,3,3-trifluoropropene (1233zd) and a flame retardant wherein the flame retardant comprises 25 phpp or less of a phosphate based flame retardant.

A corrosion inhibiting composition includes a paraffinic oil present from 5 to 10 total weight percent, a sulfonated oil present from 15 to 25 total weight percent, a paraffin wax present from 1 to 10 total weight percent, a polymer present from 1 to 5 total weight percent, and at least one solvent present from 50 to 70 total weight percent. The corrosion inhibiting formulation does not include any aromatic solvents, and thus does not have the strong unpleasant odor common to alternatives.

A thin film on a surface of a solid substrate, including: a) spraying on the surface: a colloidal suspension including solid nanoparticles (or colloids) of an inorganic compound dispersed in a solvent to obtain a wet layer of the colloidal suspension on the surface; or a suspension including an inorganic compound in polymeric form in a solvent, to obtain a wet layer of the suspension of the inorganic compound in polymeric form on the surface; or a solution or suspension of an organic polymer in a solvent, to obtain a wet layer of the solution or suspension of the organic polymer on the surface; b) drying the wet layer; c) optionally, heat-treating the wet layer that has undergone the drying step, whereby the thin film is obtained; wherein: the solvent comprises at least 95% by weight of water, and the drying is carried out in a static atmosphere.