Abstract: The present invention discloses a polycarboxylic acid water-reducing agent with high adaptability to temperature and a preparation method for preparing the same. The polycarboxylic acid water-reducing agent is prepared by introducing an unsaturated macromonomer D with a temperature-sensitive side chain which could be bonded to the backbone of the polycarboxylic acid through free radical polymerization. The polycarboxylic acid water-reducing agent prepared by the invention has an adsorption group density that can be automatically adjusted with the change of ambient temperature, and thereby shows similar dispersing capability and dispersion retention capability at different ambient temperatures, demonstrating high adaptability to different ambient temperatures. It can be used in a larger temperature range with a constant dosage, which is beneficial to further popularization and application of the polycarboxylic acid water-reducing agent in regions of different climates.

Abstract: A smart pet toy capable of automatically rolling to leak food, including a chamber, where the chamber is in a ball shape or a cylindrical shape and is internally provided with a mechanism; the mechanism is internally provided with a driving apparatus, and the driving apparatus is connected to the chamber by using a drive rod, so that the mechanism can drive the chamber to roll; the chamber is internally provided with an annular storage area, and the wall of the chamber is provided with food leakage windows in communication with the storage area, so that pet food in the storage area leaks out through the food leakage windows. The toy can be flexibly controlled manually or by a remote controller to roll and leak food as required.

Abstract: Disclosed are a highly adaptable viscosity-reducing polycarboxylate water reducer and its preparation method and application. The highly adaptable viscosity-reducing polycarboxylate water reducer is composed of a polymer and water, and the polymer accounts for 30-50 wt %; since the main chain of the polymer contains a hydrophobic benzene ring and hydrophilic amine, the polymer has strong rigidity and good solubility in an aqueous solution, and is rich in two adsorption groups of carboxyl group/phosphono group. The highly adaptable viscosity-reducing polycarboxylate water reducer of the present invention has excellent water-reducing and slump retention properties and is suitable for general construction projects and commercial concrete projects.

Abstract: A smart pet toy capable of automatically rolling to leak food, including a chamber, where the chamber is in a ball shape or a cylindrical shape and is internally provided with a mechanism; the mechanism is internally provided with a driving apparatus, and the driving apparatus is connected to the chamber by using a drive rod, so that the mechanism can drive the chamber to roll; the chamber is internally provided with an annular storage area, and the wall of the chamber is provided with food leakage windows in communication with the storage area, so that pet food in the storage area leaks out through the food leakage windows. The toy can be flexibly controlled manually or by a remote controller to roll and leak food as required.