Provided is a water blocking material prepared by reacting and foaming a starting material composition that contains a polyol, a polyisocyanate, a catalyst, a foaming agent, a foam stabilizer and a crosslinking agent, in which the polyol contains a dimer acid polyol, the content of the dimer acid polyol in the starting material composition is 85% by mass or more of the entire polyol, the polyisocyanate contains a diphenylmethane diisocyanate, the content of the diphenylmethane diisocyanate in the starting material composition is 70 to 85% by mass of the entire polyisocyanate, and the foam stabilizer contains a reactive silicone. The water blocking material is excellent in heat resistance and water blocking performance and is further excellent in flexibility.

The invention relates to a silyl terminated prepolymer and to a curable composition containing this prepolymer. These compositions are used to make sealants, coatings or adhesives useful in the field of construction, public works and civil engineering.

Winter icing can adversely impact transportation systems (aircrafts, drones, trains, etc.), infrastructure, and energy systems, among many other things. Existing ice-shedding coatings generally suffer from low durability under various mechanical, chemical, and environmental stresses. The polyurethane-based, stress-localized ice-shedding coatings described herein present a novel material paradigm to develop highly durable ice-shedding coatings capable of withstanding harsh aerospace and other industrial conditions. By optimizing the chemical composition and processing of the coating, a uniform, highly durable, polyurethane-based ice-shedding coating has been achieved that can be applied to a variety of surfaces. These coatings have been comprehensively tested, including ice adhesion strength measurements, ice-shedding capabilities in an icing wind tunnel, and a set of mechanical, chemical and environmental durability tests. These ice-shedding surfaces promise a feasible approach to address long-standing icing problems in aircrafts, drones, off-shore wind-turbines and other types of equipment and infrastructure.

A photocurable sealing material comprising at least a polythiol compound as a first component, wherein, in the case where the photocurable sealing material is used to produce two sheets having a thickness of 1 mm, a width of 25 mm, and a length of 200 mm, the two sheets are photocured by irradiation with an ultraviolet ray, then the photocured sheets are laminated, and the laminate is subjected to a load of 10 kg for 10 seconds, an action of causing the lamination interface between the two sheets to disappear is exhibited, and the self-adhesion strength in a T-type peel test is 5 N/25 mm or more when the sheets are pulled at a peel speed of 300 mm/min.

A photocurable sealing material comprising at least a polythiol compound as a first component, wherein, in the case where the photocurable sealing material is used to produce two sheets having a thickness of 1 mm, a width of 25 mm, and a length of 200 mm, the two sheets are photocured by irradiation with an ultraviolet ray, then the photocured sheets are laminated, and the laminate is subjected to a load of 10 kg for 10 seconds, an action of causing the lamination interface between the two sheets to disappear is exhibited, and the self-adhesion strength in a T-type peel test is 5 N/25 mm or more when the sheets are pulled at a peel speed of 300 mm/min.

Provided is a water blocking material prepared by reacting and foaming a starting material composition that contains a polyol, a polyisocyanate, a catalyst, a foaming agent, a foam stabilizer and a crosslinking agent, in which the polyol contains a dimer acid polyol, the content of the dimer acid polyol in the starting material composition is 85% by mass or more of the entire polyol, the polyisocyanate contains a diphenylmethane diisocyanate, the content of the diphenylmethane diisocyanate in the starting material composition is 70 to 85% by mass of the entire polyisocyanate, and the foam stabilizer contains a reactive silicone. The water blocking material is excellent in heat resistance and water blocking performance and is further excellent in flexibility.

A photovoltaic thermal collector is provided with: glasses disposed on both a sunlight receiving surface side and an opposite surface side thereto; a hot-water producing portion and a power generating portion. An olefinic rubber sealing member (A) is disposed on at least one surface side of a power generating element of the power generating portion, and an olefinic rubber sheet (B) including carbon black is disposed on an opposite surface side thereto. In addition, a resin pipe as a channel of the hot-water producing portion is made of cross-linked polyethylene or polybutene; the resin pipe is sandwiched in the olefinic rubber sheet (B); and the olefinic rubber sheet (B) is further disposed in a side portion of the resin pipe and in a gap between one resin pipe and another resin pipe.

The purpose of the present invention is to provide a pre-filled syringe formulation with staked needle, which contains an antibody at a high concentration and can be produced on an industrial scale in a simple manner without causing clogging. A pre-filled syringe formulation with staked needle, in which a protein solution is packed. The pre-filled syringe formulation is characterized in that a cap formed with a material having low water vapor permeability is provided at the needle.

The purpose of the present invention is to provide a pre-filled syringe formulation with staked needle, which contains an antibody at a high concentration and can be produced on an industrial scale in a simple manner without causing clogging. A pre-filled syringe formulation with staked needle, in which a protein solution is packed. The pre-filled syringe formulation is characterized in that a cap formed with a material having low water vapor permeability is provided at the needle.

A sealant for a concrete element, having a planar carrier and an active substance applied onto the carrier, wherein the active substance is designed to be chemically reactive with water. The carrier is flexible.