Abstract: Mouldable filled polyethylene compositions containing particulate lignocellulosic fillers are disclosed. The compositions contain 0-89.97% (by weight of the composition) of polyethylene, 0.01-89.99% (by weight of the composition) of grafted polymer, 10-60% (by weight of the composition) of particulate lignocellulosic material and 0.02-20% (by weight of the composition) of boric acid and/or borax. The boric acid and/or borax is added to suppress odor during manufacture and processing of the compositions. The compositions may be formed into moulded articles e.g. containers and the like.
Abstract: Improved non-stick coating systems can be applied to untreated smooth substrate with a polyamide-imide undercoat 0.1-5.0 microns thick preferably containing colloidal silica and surfactant.
Abstract: Non-stick coating systems can be applied to untreated smooth glass and ceramic substrates with a polysiloxane undercoat overlaid with a second undercoat of polyamide imide preferably containing colloidal silica and surfactant, with each undercoat in the range of 0.1-5.0 microns thick.
Abstract: Improved non-stick coating systems can be applied to untreated smooth substrate with a polyether sulfone undercoat 0.1-5.0 microns thick preferably containing colloidal silica and surfactant.
Abstract: A pinch valve is fabricated by providing an elongated tubular housing with a cut-back portion at an outlet end, applying adhesive to the cut back portion, with a ring around the cut-back portion, placing the housing and ring in a mold and heating all three, providing a core rod inside the housing and forcing an elastomer into the space between the core rod and the housing and between the housing and the ring, curing the elastomer and cooling everything to allow the ring to thermally contract to engage the elastomer between the housing and the ring.
Abstract: A mold fill coupling combined with a pinch fill valve and an overflow valve permits filling of a mold at one station and disconnecting the fill valve without rotating the mold.
Abstract: A mold fill coupling combined with a pinch fill valve and an overflow valve permits filling of a mold at one station and disconnecting the fill valve without rotating the mold.
Abstract: A mold fill coupling combined with a pinch fill valve and an overflow valve permits filling of a mold at one station and disconnecting the fill valve without rotating the mold.
Abstract: A countertop having a cutout portion, preferably for inserting a kitchen appliance with an overlapping flange, has corners with stress relief radii cut into the wider sides of the countertop to maximize the radii while keeping the cutout hidden under the flange.
Abstract: Negatively chargeable toner containing block copolymers for electrostatic reprography, giving improved compatibility with the toner resin and higher triboelectric charging. Preferred are block copolymers of styrene, methyl methacrylate and butyl methacrylate as one block and salts or esters of methacrylic acid or acrylic acid as the other block in the copolymer.
Abstract: Positively chargeable toner containing block copolymers for electrostatic reprography, giving improved compatibility with the toner resin. Preferred are block copolymers of styrene with methyl methacrylate and butyl methacrylate as one block and dimethylaminoethyl methacrylate as the other block, quaternized with methyl tosylate or benzyl chloride.
Type:
Grant
Filed:
December 23, 1988
Date of Patent:
May 15, 1990
Assignee:
E. I. Du Pont de Nemours & Co.
Inventors:
Dennis G. Madeleine, Carol A. Senkler, Loretta A. Grezzo Page
Abstract: Acrylic polymers with carboxylic acid and small amounts of phosphorus-containing strong acids are good pigment dispersants for use in water-based coating compositions.
Type:
Grant
Filed:
March 22, 1989
Date of Patent:
January 2, 1990
Assignee:
E. I. Du Pont De Nemours and Company
Inventors:
Jozef T. Huybrechts, Guido R. Louis van den Bosch, Rudolf F. Landriette Verhaegen
Abstract: A 35-40% weight spray solids coating composition can be achieved with a binder consisting of about 35% polyester, 30% melamine crosslinker and 30% acrylic resin containing a thixotropic agent.
Abstract: A method for preparing a stable aqueous dispersion of polyurethane modified polyacrylic involving chain extension of polyacrylic with isocyanate and hydroxyl- or amino-functional groups.
Abstract: A 20-25% weight spray solids coating composition can be achieved with a binder consisting of about 30% polyester, 25% melamine crosslinker, 7% of cellulose acetate butyrate and 25% acrylic resin containing a thixotropic agent.
Type:
Grant
Filed:
June 23, 1988
Date of Patent:
December 19, 1989
Assignee:
E. I. Du Pont De Nemours and Company
Inventors:
Sonja M. J. Abrams, Robert V. A. Vervoort
Abstract: An aluminum insert for a rice cooker is coated before drawing with a three-layer release coating. The coated insert is then deep drawn without damaging the coating. The coating has a high proportion of polytetrafluoroethylene to polyamide-imide and a low level of colloidal silica in the primer.
Abstract: An aluminum insert for a rice cooker is coated before drawing with a three-layer release coating. The coated insert is then deep drawn without damaging the coating. The coating has a high proportion of polytetrafluoroethylene to polyamide-imide and a low level of colloidal silica in the primer. After drawing, the uncoated exterior of the insert may be anodized to provide a durable, attractive finish.
Abstract: Large acrylic star polymers containing multifunctional monomers in the core are made by group transfer polymerization techniques, preferably by arm-first, core-first, or arm-core-arm approaches.
Abstract: Particulate polymethyl methacrylate polymerized in the presence of alumina trihydrate filler provides a superior blasting media for cleaning surfaces, such as for stripping paint from sensitive substrates like aluminum aircraft skin.
Abstract: Silylated oxyanion catalysts, such as trimethyl silyl 3-chlorobenzoate, provide increased livingness of group transfer polymerization, thereby permitting higher molecular weights and polymerization efficiencies.