摘要:
A reactive hot melt adhesive comprising a blend of a (meth)acrylate polymer, a polyurethane polymer containing (meth)acrylate groups and a polyurethane prepolymer containing NCO-groups wherein the content of low molecular weight (meth)acrylate urethanes is less than 1 wt % of the adhesive. The adhesive provides a fast and improved green strength during application.
摘要:
Disclosed is an aqueous composition for surface coating, including: a main ingredient comprising a first compound having at least two functional groups selected from the group consisting of a carboxyl group, a hydroxyl group, an amino group and combinations thereof, per molecule; a curing agent comprising a second compound having at least two functional groups selected from the group consisting of an aziridine group, an isocyanate group, a carbodiimide group and combinations thereof, per molecule; and an aqueous solvent. Further, an automotive sheet using the aqueous composition for surface coating is disclosed.
摘要:
The present invention relates to an erosion resistant construction comprising an element of an aircraft comprising an aircraft skin segment having an external surface, and a deicing mechanism associated with said aircraft skin segment capable of heating said external surface to temperatures in excess of 65°C, a tape comprising at least one layer comprising a crosslinked elastomeric polymer, and an adhesive layer, wherein the tape is bonded to the external surface of the aircraft skin segment by the adhesive layer.
摘要:
A composition of matter comprising a hydrophobic or hydrophilic (or both) interpenetrating polymer network containing a non-ionic/ionic polymer and a hydrophobic thermoset or thermoplastic polymer, articles made from such composition and methods of preparing such articles. The invention also includes a process for preparing a hydrophobic/hydrophilic IPN or semi-IPN from a hydrophobic thermoset or thermoplastic polymer including the steps of placing an non-ionizable/ionizable monomer solution in contact with a hydrophobic thermoset or thermoplastic polymer; diffusing the monomer solution into the hydrophobic thermoset or thermoplastic polymer; and polymerizing the monomers to form a penetrating polymer inside the hydrophobic thermoset or thermoplastic polymer, thereby forming the IPN or semi-IPN.
摘要:
The present invention relates to an erosion resistant construction comprising an element of an aircraft comprising an aircraft skin segment having an external surface, and a deicing mechanism associated with said aircraft skin segment capable of heating said external surface to temperatures in excess of 65°C, a tape comprising at least one layer comprising a crosslinked elastomeric polymer, and an adhesive layer, wherein the tape is bonded to the external surface of the aircraft skin segment by the adhesive layer.
摘要:
[MEANS FOR SOLVING] A composite film is one that includes at least a urethane polymer, wherein a ”b* value (value at an acceptance angle of 15 degrees) measured by a spectrocolorimeter after 120 hours in an accelerated weathering test and a ”b* value (value at an acceptance angle of 15 degrees) in an accelerated heat resistance test in a dark place under an atmosphere of 80°C are both 4. 0 or less. The composite film preferably, has a ”b* value (value at an acceptance angle of 15 degrees) in an accelerated moist-heat resistance test in a dark place under an atmosphere of 85°C and 85% relative humidity of 6.0 or less.
摘要:
The invention provides a cross-linkable mixture of thermoplastic polyurethanes and ethylenic unsaturated compounds and thermoset materials that can obtained therefrom. The invention also provides application of the cross-linkable mixtures and processes in a solvent-less coating process.
摘要:
A resin composition comprising an interpenetrating polymer network comprising: (a) 5 to 95 weight percent of a polyurethane prepolymer; (b) 5 to 95 weight percent of a waterborne polymer component; and (c) optionally, a chain extender or crosslinker; wherein either the polyurethane prepolymer has at least one functional group that is photopolymerizable or the waterborne polymer component has at least one functional group that is photopolymerizable; or wherein both the polyurethane prepolymer and waterborne polymer component have at least one functional group that is photopolymerizable.