摘要:
A pail body (21) having a longitudinal axis and an open end has an end wall (60) fitted in the open end, said fitting involving outward bending of a flange (64) at the open end of the pail body and interengagement of this body flange (64) with a flange (66) on the end wall introduced into the ope end of the pail body. A region (63) of the pail body adjacent the body flange (64) is formed so that it is outwardly inclined with respect to the axis of the pail body at a small angle Y (e.g. from 4° to 12°), said angle corresponding to the angle of taper on a tapering rim part (65) on the end wall (60) introduced into the open end of said pail body, thus promoting close contact between said body region with said tapering rim part.
摘要:
A water dispersible coating composition is prepared by reacting together at elevated temperature in the presence of an amine 40 to 90% by weight of an epoxy resin composition of average epoxy functionality 1.0 to 2.0 epoxide groups per molecule and 10 to 60% by weight of a polymer containing carboxylic acid groups. The ratio of carboxylic acid groups to epoxide groups is 1.5:1 to 20:1. The reaction is carried out in a mixture of a water miscible organic solvent with 5 to 30% of water based on the combined weight of epoxy resin and polymer containing carboxylic acid groups. A coating composition in the form of a stable dispersion is produced by mixing the water dispersible coating composition prepared as described above with a base and sufficient water to form a predominantly aqueous continuous phase.
摘要:
A marine paint capable of becoming smoother in relatively moving sea water and having no or a low content of organotin comprises a film-forming acrylic polymer and a metalliferous pigment which is sparingly soluble in seawater. The acrylic polymer comprises 20-100 per cent by weight of monomer units (A) selected from methyl acrylate and ethyl acrylate units, 0-45 per cent by weight of monomer units (B) of a triorganotin salt of an olefinically unsaturated carboxylic acid and 0-80 per cent by weight of monomer units (C) which are alkyl methacrylate units having 1-4 carbon atoms in the alkyl group or styrene units. Monomer units (A), (B) and (C) form at least 80 per cent by weight of the acrylic polymer; the balance of the polymer if any comprises units of at least one other olefinically unsaturated comonomer.
摘要:
Fouling of a marine structure, such as an oil production platform or a drilling rig, by seaweed, barnacles, mussels and the like, is prevented by securing to the underwater surface of the marine structure a coated flexible sheet material, the outermost surface of which is a layer of silicone rubber. The preferred coated flexible sheet material, useful as an anti-fouling cladding, is a coated fabric having an outermost coated surface which is a layer of silicone rubber/silicone oil mixture produced by curing a room-temperature-vulcanisable silicone rubber having hydroxyl end groups in the presence of a silicone oil.
摘要:
A powder coating composition comprises a component (A) containing carboxylic acid or anhydride functionality and a component (B) containing hydroxy functionality. The components (A) and (B) are both solids at temperatures up to 50°C and at least one of them is a synthetic resin having a glass transition temperature in the range 0 to 120°C. The carboxylic acid or anhydride-functional component (A) is a compound or polymer containing at least two cyclic carboxylic anhydride groups per molecule or is a compound containing a moiety of the formula: where X is a hydrogen atom or an alkyl group, or a cyclic anhydride thereof. The hydroxy-functional component (B) contains at least two hydroxy groups per molecule and contains at least one amine group in its molecule to catalyse the reaction of the carboxylic acid or anhydride groups of component (A) with the hydroxy groups of component (B). The composition is prepared by mixing the ingredients, extruding them at a temperature above the glass transition temperature of at least one of the components but below thefusion temperature, and comminuting the extrudate.The composition is applied to substrates and heated to cause fusion and reaction of the ingredients to cure the coating layer formed.
摘要:
An apparatus for metering required proportions of different fluid ingredients to make a required mixture (e.g. a colored paint) includes a rack of storage containers (20) for the ingredients, each provided with a valve-controlled outlet (33) and a receiving container (42) mounted on a weighing means (40) which is presentable by a support (41) to a chosen sequence of storage containers in turn to receive the required contribution from each. Metering of the necessary ingredient additions is effected automatically by valve-actuating means (61) carried by the weighing means support (41). Data processing control to optimise operation is described.
摘要:
A water dispersible coating composition is prepared by reacting together at elevated temperature in the presence of an amine 40 to 90% by weight of an epoxy resin composition of average epoxy functionality 1.0 to 2.0 epoxide groups per molecule and 10 to 60% by weight of a polymer containing carboxylic acid groups. The ratio of carboxylic acid groups to epoxide groups is 1.5:1 to 20:1. The reaction is carried out in a mixture of a water miscible organic solvent with 5 to 30% of water based on the combined weight of epoxy resin and polymer containing carboxylic acid groups. A coating composition in the form of a stable dispersion is produced by mixing the water dispersible coating composition prepared as described above with a base and sufficient water to form a predominantly aqueous continuous phase.