13 results about "Wet bonding" patented technology

The invention discloses a body temperature responsive wet adhesive as well as a preparation method and application thereof in bone defect repair, and belongs to the technical field of preparation of bone defect repair materials. Carbon-carbon double bonds in methoxyethyl acrylate (MEA), N-isopropylacrylamide (NIP) and acrylic acid (AA) are subjected to a free radical polymerization reaction to generate a polymer chain, and a cross-linking agent containing metal cations is added for cross-linking. The body temperature responsive wet adhesive has a good wet adhesion effect and the ability of improving the stability of bone meal, and can solve the technical problem of bone substitute displacement caused by unstable fixation of a barrier membrane.

The present invention relates to an aqueous dispersion at least containing at least one polychloroprene, at least one component selected from the group consisting of dilute silicic acid sol, a modified silica sol and mixtures thereof, at least one acrylic acid or a copolymer containing acrylic acid ester and optionally further additives, wherein the aqueous dispersion has a pH of 9.7 to 10.8. The invention also relates to a method for preparing the aqueous dispersion, to an adhesive composition at least containing the aqueous dispersion, to the use of the dispersion for preparing adhesive compositions, to the use of the dispersion for adhesively bonding foam substrates according to the spray coagulation method, to an adhesive composite containing at least one substrate and / or sheet material adhesively bonded using the aqueous dispersion, and to a method for producing a composite material, wherein at least two joining parts of the composite material are adhesively bonded using the aqueous dispersion.

This invention relates to the field of epoxy grouting materials technology. Addressing the problem that epoxy grouting materials used in humid environments such as rail transit experience a decline in adhesion and poor stability over time, this invention specifically discloses a high-humidity-adhesion epoxy grouting material and its preparation method. The high-humidity-adhesion epoxy grouting material comprises component A and component B, mixed in a mass ratio of 1-1.5:0.8-1.2. Component A, by mass fraction, comprises 85-95 wt% catechol-modified epoxy resin, 2-10 wt% aminated graphene oxide, and 5-12 wt% diluent; component B comprises 80-95 wt% amine curing agent, 3-15 wt% hydrophobic modified filler, 3-8 wt% expanded vermiculite, and 1-3 wt% dispersant. This invention uses catechol compounds to modify epoxy resin, constructing catechol groups in the epoxy resin matrix to improve the bonding strength and applicability of epoxy grouting materials in humid environments. The resulting epoxy grouting material has excellent wet bonding performance.

The invention discloses a stiff adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesives. The stiff adhesive is prepared from the following components in parts by weight: a vinyl monomer, acrylic ester, metacrylic acid ester, a functional monomer, protective glue, an emulsifier, an initiator, a cross-linking agent and deionized water, the functional monomer is at least one of acrylamide, hydroxyethyl acrylate, hydroxymethyl acrylamide and glycidyl methacrylate; the stiffening agent adhesive can be used as a stiffening agent coating, can also be used as an adhesive for wet bonding, and is used for bonding multiple layers of fabrics or paper and providing stiffness.

The application discloses a high-performance mineral-based adhesive for recycling of bulk solid waste and a preparation method thereof. The high-performance mineral-based adhesive for recycling of bulk solid waste comprises raw materials in the following proportions by weight: 100 parts of active mineral, 1-100 parts of solid alkali activator, 1-200 parts of distilled water, 1-200 parts of epoxy resin and 0-30 parts of silane coupling agent. The application also provides a wood-based panel prepared from the adhesive. The wood-based panel is prepared by the following steps: ball milling and pre-reaction of raw materials, preparation of the mineral-based adhesive, coating of the adhesive on a single board to form a board blank, hot pressing, and post-processing. The wet bonding strength of the product reaches 1.31 MPa, meeting the strength requirement of GB / T 9846-2015 "General plywood" for type II plywood, and the product does not release formaldehyde. The solid alkali activator is used to replace the traditional alkali activation liquid mode, and the prepared adhesive has the advantages of easy control of solid content, convenient transportation, simple process, low cost and the like, and the wood-based panel prepared from the adhesive has the advantages of high performance and good water resistance.

The present application relates to the technical field of high polymer materials, in particular to a high-strength and high-toughness konjac-based biological polysaccharide composite film and a preparation method and application thereof. First, a konjac-based hydrogel composite film is prepared by a one-pot method, and then water is volatilized in a hydrophilic environment to obtain a high-strength and high-toughness konjac-based biological polysaccharide composite film with controllable wet interface adhesion. The prepared high-strength and high-toughness konjac-based biological polysaccharide composite film realizes controllable and rapid adhesion at the wet interface, has the characteristics of self-healing, repeated bonding and recycling, and also shows excellent biological adaptability, good antibacterial property at the wet tissue interface, and can realize efficient regeneration and repair of damaged tissue with controllable time sequence. The preparation process of the present application is simple and easy to operate, and the product has excellent performance, which can be applied to the fields of biological tissue engineering and wet bonding engineering materials.

The invention discloses modified alpha-cyanoacrylate for improving a wet bonding effect, a preparation method and a medical adhesive, and belongs to the field of biomedical materials. The molecular chain of the modified alpha-cyanoacrylate contains a catechol group; the modified alpha-cyanoacrylate is prepared from the following raw materials: alpha-cyanoacrylate alkyl ester and a catechol functional monomer in a molar ratio of 1: (1-1.5). The catechol functional monomer comprises 3, 4-dihydroxy benzyl alcohol and / or 3.4-dihydroxy phenyl glycol. Under the action of titanate, a catechol functional monomer is grafted and modified on a molecular chain of alpha-cyanoacrylate alkyl ester, so that multiple bonding on a wet interface is realized, a stable adhesion network can be constructed on a molecular level, and the wet adhesion performance is enhanced. The hydrophilicity of the alpha-cyanoacrylate can be improved, the wettability of the medical adhesive is improved, the medical adhesive can be uniformly spread on a wet interface, and the wet adhesive property is further improved.

The application provides a two-component high-efficiency antibacterial water-based acrylic adhesive and a preparation method thereof. The two-component water-based acrylic adhesive comprises component A and component B, wherein the component A is a water-based acrylic emulsion, and the component B is an aqueous solution of guanidine salt polymer and polyethylene glycol block copolymer, which is a flocculant and also an antibacterial agent. In use, the component A and the component B are respectively sprayed from a two-component spray gun, mixed in the air, and the component B causes the component A to break emulsion to form a film to generate initial adhesion, realize wet bonding, and also has antibacterial performance to provide excellent antibacterial performance for the adhesive layer. The two-component antibacterial water-based acrylic adhesive uses water as a solvent, is halogen-free, green and environmentally friendly, has good initial adhesion, high bonding strength, good heat resistance, good adhesion to various substrates, and excellent antibacterial performance.

The application discloses a high-water-resistance high-precompression formaldehyde-free wood adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesive preparation. The wood adhesive is first synthesized by using tetraethyl orthosilicate and dodecyl trimethoxysilane to synthesize polysiloxane with a hydrophobic long chain. Tannic acid is selected as a skeleton to enhance wet bonding, and polyamide polyamine epichlorohydrin is selected as a polymer long chain to perform chain winding to enhance cohesive force and surface adhesion. Through multiple hydrogen bonds, electrostatic action and covalent bonds, a polymer high-water-resistance high-precompression formaldehyde-free adhesive is synthesized. In a humid or underwater environment, the hydrophobic chain can repel water molecules, so that the adhesive fully contacts the surface of a base material, and a protective film is formed on the surface of the adhesive to prevent erosion of water molecules. The adhesive can realize normal-temperature instantaneous adhesion, has strong water resistance, durability, acid and alkali resistance and excellent temperature adaptability, can resist ultraviolet rays, and can effectively bond even in a strong oxidizing solution.

The invention relates to a hot melt adhesive composition comprising a polymer component, the polymer component comprising at least one styrene-butadiene-styrene block copolymer P having a styrene content from 35 to 50 % by weight; a styrene-butadiene diblock content from 50 to 80 % by weight; and a viscosity of a 15 % by weight toluene solution at 25°C of 20 to 40 mPa.s, and at least one styrene block copolymer other than a styrene-butadiene-styrene block copolymer, wherein said styrene-butadiene-styrene block copolymer P is at a content from 10 to 40 % by weight relative to the total weight of the polymer component. The invention also relates to the use of said composition as an adhesive for bonding two substrates, and to articles comprising at least one interior or exterior surface coated with said composition.