摘要:
A composition that may be used to retain moisture within fresh concrete as it cures to optimize the curing of the concrete may include one or more hardening and densifying agents and one or more temporary moisture sealing agents. Additionally such a composition may include a siliconate. The hardening and densifying agent of such a composition may penetrate the surface of fresh concrete to react with free lime, providing the fresh concrete with a strong surface. The temporary moisture sealing agent may form a moisture barrier on the surface of the fresh concrete to prevent moisture from escaping from the fresh concrete before the fresh concrete has sufficiently cured. The temporary moisture sealing agent may degrade within a matter of days, facilitating its removal from the surface of the concrete once the concrete has cured and enabling further treatment of the surface without undue delay.
摘要:
A coated article which includes a cement fiberboard substrate and a radiation-curable nonaqueous coating system applied to the substrate. The coating system includes one or more olefinic compounds and one or more non-olefinic resins which are soluble or dispersible in the one or more olefinic compounds. The non-olefinic resins may be chlorinated or non-chlorinated.
摘要:
A closely packed film comprising at least one unimolecular layer which contains at least one amphiphilic compound whose hydrophobic molecular region comprises at least one hydrocarbon chain which has been chemically modified, at least terminally, is distinguished by very good adhesion between the film and the adjacent layer (monolayer or substrate) on contact between the hydrophobic region of the film with the hydrophobic surface of the adjacent layer, and on contact between the hydrophilic region of the film and the hydrophobic region of the adjacent layer, and vice versa.Films of this type can be used with advantage, for example, for improving the surface-slip characteristics of the substrate, in the production of sensors or in semiconductor technology.
摘要:
The surfaces of organic and inorganic substrates, such as polyethylene film and metals, respectively, can be modified by cold plasma deposition of difluorocarbene or trifluoromethyl radical specie generated by subjecting precursor vapor, for example, perfluorocyclobutane or hexafluoroethane, to a radio frequency electrical glow discharge.
摘要:
A FLUID PRIMER ADAPTED TO BE APPLIED TO MASONRY SURFACES TO IMPROVE THE ADHESION THERETO OF SEALANT COMPOSITIONS BASED ON THE LIQUID POLYSULFIDE POLYMERS. THE PRIMER COMPRISES AN ORGANIC SOLVENT SOLUTION OF A CHLORINATED RUBBER AND A POLY(LOWER ALKYL METHACRYLATE), PREFERABLY POLY(N-BUTYL METHACRYLATE). THE PRIMER PROVIDES A BOND WHICH EXHIBITS BOTH GOOD ADHESION AND RESISTANCE TO ULTRA-VIOLET LIGHT.
摘要:
Fibrous webs, such as asbestos paper, are impregnated with a mixture of a chlorinated polymeric C3 or C5 hydrocarbon, a chlorinated terphenyl or chlorinated paraffin plasticizer, and a polyepoxy compound. The impregnated webs, when suitably shaped, are useful as contact tower air and water contact bodies.
摘要:
AN ALKALINE EARTH METAL HYDROXIDE IS ADDED TO A PRIMER COMPOSITION TO PRODUCE BETTER BONDING OF POLYSULFIDE BASED SEALANTS TO CALCAREOUS OR ARGILLACEOUS BASED BUILDING MATERIALS. IN THE PREFERRED EMBODIMENT CALCIUM HYDROXIDE IS ADDED TO A CHLORINATED RUBBER-METHYLENE DI(P-PHENYLENE ISOCYANATE) PRIMING COMPOSITION TO PRODUCE A CONCRETE PRIMER OF INCREASED ADHESION FOR BONDING LIQUID CURABLE POLYTHIOL COMPOUND BASED SEALANT COMPOSITIONS TO STRUCTURAL ELEMENT SUBSTRATES.
摘要:
This invention provides a process for preventing blisters forming in water vapor-permeable paint applied to moist plaster using as undercoat a solution of a vinyl chloride copolymer.