摘要:
Polymers comprising pendant rearranged oxazoline and/or oxazine portions linked to a perfluorocarbon moiety having a perfluoroalkyl group are prepared. Such polymers can provide coating compositions which exhibit critical surface tensions of wetting of less than about 15 dynes/cm.
摘要:
Polymers comprising pendant rearranged oxazoline and/or oxazine portions linked to a perfluorocarbon moiety having a perfluoroalkyl group are prepared. Such polymers can provide coating compositions which exhibit critical surface tensions of wetting of less than about 15 dynes/cm.
摘要:
A coating composition comprising:a hydrolyzed or partially hydrolyzed alkoxysilane,a solvent,and an arylcyclobutene;is useful in a variety of applications, including coatings for multichip modules, flat panel displays and integrated circuits. The preferred alkoxysilanes correspond to the formula: ##STR1## wherein R is C.sub.1 -C.sub.6 alkylidene, C.sub.1 -C.sub.6 alkylene, arylene, or a direct bond; Y is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, aryl, 3-methacryloxy, 3-acryloxy, 3-aminoethylamino, or 3-amino; R' is independently in each occurrence C.sub.1 -C.sub.6 alkyl; and Z is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or OR'.
摘要:
Described herein is a composition comprising at least 10 percent by weight of water and, based on the weight of components (a), (b), and (c); (a) 0 to about 95 percent by weight of a water-compatible polymer having at least two pendant carboxylate groups; (b) 1 to about 60 percent by weight of a polymeric polycarboxylate polymer different from (a) having (1) at least two pendant carboxylate groups and (2) at least one internal amide, thioamide, urea, thiourea, biuret, dithiobiuret, or urethane group; and (c) 2 to about 70 percent by weight of a polyfunctional crosslinking agent having an ionic or potentially ionic moiety counter ion capable of reacting with the carboxylate groups of (a) and (b). Component (b) may also contain fluoroalkyl groups. The composition of the invention provides a water-based coating which, when deposited on a surface to be coated and allowed to dry and form a crosslinked polymer, has a high degree of wear resistance, hardness, and impact resistance.
摘要:
A corner form for forming concrete having panels connected by a plurality of tie brackets. Each panel comprises a short led and a long leg. The exterior panel has an eighteen inch long, and a thirty inch long leg. The panels have projections formed in the upper surface and corresponding, vertically aligned notches formed in the lower surface. The projections and notches receivingly cooperate to interlock with one another and vertically align the tie brackets. The corner forms are configured such that the long and the short legs enable alternating, overlapping projections of succeeding courses. The tie brackets, each having perpendicularly arranged flat plates extending the full height of the form, are spaced apart twelve inches on centers, measured from the corner edge of the exterior panel. A vertical bracket is optionally embedded in the corner of the exterior panel. The combination of the above inventive features constitute the novel corner form.
摘要:
Rapid set cellular articles can be prepared from a latex by the steps of: a) frothing a latex that contains a dispersed polymer having pendant cationic groups or adsorbing cationic molecules or both, and pendant acid groups; and b) rendering the frothed latex sufficiently basic to make the cellular article. The cellular articles of the present invention are advantageously prepared at ambient temperatures and pressures, and in the absence of organic solvents or CFCs.
摘要:
Novel photocurable, adherent coating compositions and a method for preparing such compositions are described. A substrate can be coated with a first compound bearing a plurality of onium groups and a second compound bearing a plurality of nucleophilic groups. The resulting coating cures readily upon exposure to actinic radiation. These compositions can be used in preparation of photoresists, composite membranes, and modifying surfaces either for accepting adhesives or releasing oily soil.
摘要:
Novel phosphonic acid-containing compounds such as (2-(4-ethylphenyl)ethenyl)-phosphonic acid and esters thereof are disclosed. A method preparation of the phosphonic acids comprising contacting a diethylenically unsaturated aromatic compound and phosphorus pentachloride in the present of sulfur dioxide is also disclosed. The compounds of this invention are useful as monomers for the preparation of polymers having enhanced anti-corrosive properties.
摘要:
Reverse osmosis membranes treated with polymers bearing carboxylic acid groups and optionally pendant hydroxyl or amide moieties display enhanced salt rejection and/or increased water flux. This treatment is particularly useful for improving the membrane characteristics of cellulose acetate and polyamide membranes.
摘要:
The invention is (hydroxy)-phosphinylalkyl acrylate, (hydroxy)-phosphinylalkyl methacrylate or an alkali metal, alkaline earth metal or ammonium salt thereof.In another aspect, the invention is a polymeric composition which comprises the reaction product of:(a) between about 0.5 and 100 percent by weight of a (hydroxy)-phosphinylalkyl acrylate, (hydroxy)-phosphinylalkyl methacrylate or an alkali metal, alkaline earth metal or ammonium salt thereof; and(b) between about 0 and 99.5 weight percent of a compound containing a polymerizable 1,2-ethylenically unsaturated moiety.