51results about How to "Restricted free movement" patented technology

The invention relates to a nano-grade silica modified montmorillonite particle preparation method, and a method for applying the nano-grade silica modified montmorillonite particles in producing modified aqueous polyurethane resin with an in-situ method. According to the invention, tetraethoxysilane, a silicane coupling agent and montmorillonite are subject to a modification reaction, such that anano-grade silica layer is modified on the surface of montmorillonite, and active amino-groups are modified. Therefore, the compatibility of montmorillonite in aqueous polyurethane resin is better, such that the emulsion can be more stable. According to the invention, silica modified montmorillonite is prepared through an in-situ method, a silica layer comprising a large amount of silanol is modified on the surface of montmorillonite, and lamella parts of montmorillonite are peeled. When the modified particles are positioned in an aqueous polyurethane system, high molecular chains of polyurethane are subject to an intercalation reaction with montmorillonite, such that free movements of polyurethane molecular chains are restricted, and mechanical properties and thermal stability of the material are improved. Compared to simple polyurethane, tensile strength of the material is improved by 1-2 times, and thermal decomposition temperature of the material is improved by 30 to 50 DEG C.

The invention relates to a polyamide composition with high dimensional stability and a preparation method thereof. The polyamide composition comprises the following components in parts by weight: 60 to 90 of fatty polyamide composition, 2 to 10 of compatilizer, 1 to 10 of inorganic metal compound, 0 to 5 of polysiloxane with low molecular weight and 0 to 2 of auxiliary agent. The preparation method comprises the following steps of: premixing the raw materials in a high-speed mixer for 10 to 30min, controlling the temperature to be 40 to 60 DEG C, then adding premix into a double-screw extruder, conveying, melting, shearing, extruding, cooling and granulating so as to prepare a polyamide composition product with high dimensional stability. Compared with the prior art, the invention shows excellent dimensional stability and heat distortion temperature with high retention rate, is suitable for occasions with higher requirement to the dimensional stability, such as the panel of the air conditioner of an automobile, an instrument panel, a camera bracket, a sports apparatus and the like, and can be directly processed by injection molding or other forming methods.

The invention discloses an extinguishing agent. The extinguishing agent is formed by mixing and stirring strong hydrophobic solid particles and aqueous solution at high speed, wherein the strong hydrophobic solid particles are one type or more of magnesium hydroxide particles, silicon dioxide particles, calcium carbonate particles, talcum particles, aluminium oxide particles, aluminium hydroxide particles, zinc borate particles, zinc oxide particles, iron sesquioxide particles, titanium dioxide particles, montmorillonite particles, hydrotalcite particles, coal ash particles, diatomite particles, mica particle, attapulgite particles and zeolite particles after hydrophobic modification. The extinguishing agent disclosed by the invention is nontoxic, environmental pollution is less, and secondary loss caused by strong flowability of water can be avoided while playing the advantages of the water as the extinguishing agent and reducing the using amount.

The invention provides a continuous solar power generation system which comprises a composite photovoltaic power generation device and a hydrogen cell, wherein the composite photovoltaic power generation device comprises an upper electrode layer, a window layer, a light absorbing layer, a lower electrode layer, a semiconductor electrode layer and a counter electrode layer which are arranged from top to bottom in sequence; the upper electrode layer, the window layer, the light absorbing layer, the lower electrode layer and the semiconductor electrode layer are all arranged in a light permeation manner; water or electrolyte is filled between the semiconductor electrode layer and the counter electrode layer; the hydrogen cell is arranged outside the composite photovoltaic power generation device; a first hydrogen conveying pipeline is arranged between the hydrogen cell and the semiconductor electrode layer. By adopting the continuous solar power generation system, the utilization rate of solar energy is increased, and continuous power generation is achieved.

The invention discloses a feed water regulator and a method for restoring the normal moisture of the feed. The feed water regulator is composed of the following components: a total of 5.0-20.0% of various nonionic surfactants, and a total of 50.0-20% of propionic acid and propionate 80.0%, water 0.0-45.0%; the non-ionic surfactant refers to sucrose fatty acid ester with HLB value between 11-14. First mix the feed moisture regulator and water evenly to form a feed moisture regulator aqueous solution with a concentration of 3-6%; then add the feed moisture regulator aqueous solution into the feed mixer in a mist form according to the amount of feed water replenishment. It can be fully mixed evenly in the feed mixer together with other raw materials for producing feed. The invention can convert most of the free water into bound water, which can not only improve the water retention rate of the feed, but also prevent the feed from mildewing.

The invention discloses an organic montmorillonite-aqueous polyurethane compound leather finishing agent and a method for preparing the same. The method comprises the following steps: firstly using quaternary ammonium salt such as cetyl trimethyl ammonium chloride, octadecyl dihydroxyethyl methyl ammonium bromide and the like, organic amine such as ethylene diamine, octadecylamine and the like, or a silane coupler, polyisocyanate and the like to organically modify montmorillonite to prepare organic montmorillonite; and secondly, performing intercalation reaction of emulsion of a polyurethane resin finishing agent and the organic montmorillonite to obtain the finished product of the organic montmorillonite-aqueous polyurethane compound leather finishing agent. In the method, the quaternary ammonium salt, the organic amine, the silane coupler or the polyisocyanate are used for organically modifying the montmorillonite, so that the interlamellar spacing of the montmorillonite is increased, the micro environment among the lamellas is improved, the compatibility of the montmorillonite and the organic phase is improved, and the intercalation reaction of the polyurethane molecules and the montmorillonite is easily performed; moreover, due to the interlamellar compound of the organic montmorillonite on the polyurethane resin finishing agent, the mechanical property, the thermal resistant stability, the water resistance and the water vapor permeability of the finishing material are improved. When the leather finishing material is applied to leather finishing, the leather finishingmaterial has the advantages of greatly improving the mechanical strength and thermal resistant stability of the coating and having active effects on water resistance, sanitary property and the like of the coating.