38results about How to "Low mixing viscosity" patented technology

The invention relates to an ultralow-hardness polyurethane pouring sealant and a preparation method and application thereof. The polyurethane pouring sealant is composed of a component A and a component B, wherein the component A is prepared from, by weight, 90-100 parts of Polypolyol, 0.1-1 part of compound type anti-yellowing agent, 0.1-2 parts of catalyst, 0.1-1 part of defoaming agent, 0.1-5 parts of coupling agent and 0-10 parts of plasticizer, the component B is prepared from, by weight, 30-40 parts of polyisocyanate and 60-70 parts of plasticizer. The pouring sealant can be suitable for automatic pouring of handwork, is short in curing time at room temperature, and has the advantages of being transparent, few in bubble, high in insulativity, high in adhesion to metal and the like after being cured.

A transparent silicone gel for bonding liquid crystal screens. The raw material formula includes 35-55 parts of component A; 10-25 parts of component B; 15 parts of component C2; 5 parts of adhesion promoter; 5-25 parts of component E; 0.1-5 parts of the catalyst; 0.1-1.0 parts of the inhibitor; the component A is a vinyl-terminated polysiloxane conforming to the general formula (1): the component B is a vinyl-terminated polysiloxane conforming to the general formula (2) Propoxy polypropylene oxide: the component C is a vinyl MQ silicone resin, and the M:Q ratio is 0.8-1.5; the component E is a terminal hydrogen polysiloxane conforming to the general formula (3). The transparent silicone gel for bonding liquid crystal screens prepared by the invention has the advantages of low viscosity, short defoaming time, fast curing and molding, and moderate hardness.

The invention discloses a low-viscosity and high-permeability building concrete reinforcement plugging epoxy waterproof material, which includes A component and B component. The raw materials of A component include: 45-51% bisphenol A type epoxy resin, 18-32% Reactive diluent, 10-15% flexible modifier, 3-6% coupling agent and 6-12% auxiliary; B component raw materials include: 20-28% alicyclic amine curing agent, 36-41% modified Alicyclic amine curing agent, 20-30% polyetheramine curing agent and 10-15% auxiliary agent. The epoxy waterproof material of the present invention is environmentally friendly, has low viscosity, strong permeability, good aging resistance, can be cured at low temperature and normal temperature, has a moderate application period, is convenient for construction, and can easily penetrate into the small cracks and capillary pores of building concrete. After curing, it will form a consolidated body with concrete to strengthen and strengthen, and the formed consolidated body has a stable structure, good waterproof and impervious effects.

The invention discloses an epoxy-based pouring sealant for end capping of a PVDF ultrafiltration membrane assembly and a preparation method of the epoxy-based pouring sealant. The epoxy-based pouring sealant comprises a component A and a component B. The component A is prepared from epoxy resin, an active flexibilizer, an active diluent and a functional assistant. The component B is prepared from degenerative aromatic fatty amine, a flexible amine curing agent, special phenolic aldehyde amine and an accelerant. Degenerative aromatic fatty amine is degenerated based on m-xylylenediamine. Epoxy glue has high toughness, certain flexibility is achieved for the root of membrane silk of the ultrafiltration membrane assembly, and therefore the silk breakage problem is relieved; corrosion of the epoxy glue to the PVDF membrane silk is eliminated, the reddish brown blackening phenomenon of the membrane silk of the ultrafiltration membrane assembly is eliminated, and the membrane silk is kept intact. The requirements of the end capping process of ultrafiltration membrane assemblies of multiple types can be met, adhesion is excellent after end-capping curing is completed, chemical medium resistance is good, the durable ultrafiltration membrane assembly can be prepared, and the ultrafiltration membrane assembly is suitable for being applied to the field of industrial sewage treatment of wide occasions.

The invention relates to pouring polyurethane resin for wind power blades and a preparation method thereof, and belongs to the field of wind power technology composite materials. The perfusion polyurethane resin for wind power blades of the present invention includes component A and component B which are packaged separately and mixed when used; said component A includes polymerized isocyanate, isocyanate monomer and initiator; said component B includes 2 functional Polyether polyols, trifunctional polyether polyols, water scavengers, reactive diluents, defoamers, polyurethane delayed catalysts and accelerators. The invention is a two-component polyurethane system. The mixed polyurethane system has the advantages of low mixing viscosity, long gel time, high mechanical strength and low moisture sensitivity. The composite material product prepared by the polyurethane has no bubbles and excellent FRP performance , fully meet the requirements of wind turbine blade manufacturing. Moreover, the preparation method is simple, the raw material cost is low, and defects such as bubbles and whitening do not occur during the pouring process, and can be widely used in the preparation of various large-scale wind power blade composite materials.

The invention discloses a bis-secondary amine containing siloxane group and its preparation method and application. The bis-secondary amine containing siloxane group is composed of one or more than one dibasic primary amine and containing Siloxanes with unsaturated double bonds are obtained by Michael addition. The B component of the spray polyurea is prepared by mixing the bis-secondary amine and its additives, and the isocyanate prepolymer generated by the reaction of polyether polyol and isocyanate is used as the A component, and the volume ratio of A\B components is 1 : 1 mixed and sprayed to obtain polyurea material. The two active hydrogens of the bis-secondary amine can react with isocyanate to form linear polyurea, while the siloxane group can be hydrolyzed to form Si‑O‑Si crosslinking points, which reduces the crosslinking speed of amine and isocyanate and improves the polyurea The mechanical properties of the material.

The invention discloses a resin composition and a preparation method thereof, and relates to the technical field of resin materials. The resin composition comprises a component A and a component B, wherein the component A comprises the following raw materials in percent by weight: 45 to 55wt percent of bisphenol A type epoxy resin, 11 to 23wt percent of aliphatic epoxy resin, 5 to 13wt percent ofa reactive diluent, 13 to 27wt percent of a fire retardant, and 9 to 15wt percent of a flexibilizer; the component B comprises the following raw materials in percent by weight: 80 to 90wt percent of acuring agent, and 10 to 20wt percent of an accelerant. The resin composition has the effect that the viscosity is low, the curing time can be shortened, and the production efficiency can be improved.The preparation method comprises the following steps: mixing the component A and the component B according to the weight ratio being 10:(2-3); uniformly mixing, and then ensuring that polymerizationreaction is performed for 40 to 60min at 60 to 90 DEG C, so as to obtain the resin composition. The preparation method is simple, and easy to implement.

The invention relates to an epoxy primer and particularly relates to an epoxy anticorrosion primer for a smooth metal surface and a preparation method thereof. The epoxy anticorrosion primer is prepared from a component A including 6 to 13 parts of epoxy resin A, 8 to 18 parts of epoxy resin B, 0.3 to 1.0 part of a de-foaming agent, 0.4 to 1.0 part of an aminosilane coupling agent, 0.6 to 1.5 parts of a wetting dispersant, 15 to 25 parts of anti-rust paint, 20 to 35 parts of packing, 0.5 to 1.5 parts of a thixotropic agent and 5 to 9 parts of an organic solvent; and a component B including 9 to 13 parts of epoxy modified polyamide C and 7 to 10 parts of epoxy modified polyamide D. Compared with the prior art, the epoxy anticorrosion primer for the smooth metal surface, provided by the invention, adopts the aminosilane coupling agent to modify the epoxy resin, and a modified polyamide curing agent is reasonably compounded and a solvent system is reasonably optimized, thus solving the problem that the adhesive force of an anticorrosion coating on the smooth surface is poor.

The invention relates to light emitting diode (LED) epoxy encapsulation adhesive and a preparation method thereof. Aiming at the defects that the epoxy resin has poor weather resistance and is aged and yellowed under the irradiation of ultraviolet, an ultraviolet absorbent is added into the conventional LED epoxy encapsulation adhesive. The ultraviolet absorbent can absorb the light with wavelength of about 290 to 400 nanometers; and by chemical redox reaction, color molecules are finally decomposed and faded, and ultraviolet resistant effect is achieved. The LED encapsulation adhesive prepared by the method overcomes the defect that the common epoxy encapsulation adhesive cannot be used for long time under the environment of ultraviolet or high temperature; and in addition, because the yellowing resistance of the adhesive is promoted, the baking temperature and the baking time in the product encapsulation process can be improved when the adhesive is used, and the mechanical property of a product is greatly improved.

The invention brings forward a formula for low free nanometer wear-resistant polyurethane. The formula comprises, by weight, 100 parts of a low free PU performed polymer, 12 to 12.5 parts of MOCA and 3 to 5 parts of montmorillonite. With the formula provided by the invention, polyurethane has a small viscosity after mixing, good fluidity in processing and a small compressive deformation value, and a rebound value of a product is great.

The invention provides a non-curing rubber asphalt waterproof coating capable of flame retardancy and smoke suppression that can be applied at normal temperature. The raw materials include asphalt, softening oil, activator, waste rubber powder, modifier, liquid flame retardant and synergist. The preparation process is as follows: Mix and stir the mixed asphalt and softened oil evenly, heat up and dehydrate, add an activator, stir and develop fully, add waste rubber powder, after the development is complete, continue to add modifiers to dissolve, add liquid flame retardants to reduce viscosity And flame retardant synergist, discharge after cooling down. The present invention adopts the sol method, uses the liquid flame retardant as the liquid filler to reduce the viscosity and soften the rubber modifier, and also acts as the main flame retardant to achieve the flame retardant effect. The asphalt is also modified in multiple steps. Through the desulfurization of the activator, the S-S bond / S-C bond of the network macromolecular segment in the waste rubber powder is oxidized and broken, and a large number of small molecular segments are produced. The suspension is dispersed in asphalt and forms a stable semi-solid continuous phase system through a gel film. This process can reduce the shear rate and energy consumption in the production process, so as to realize normal temperature construction, flame retardancy and smoke suppression, effectively reduce construction energy consumption and environmental pollution, and fully recycle and reuse "polymer waste" such as waste rubber powder. Conducive to building a resource-friendly society.