5 results about "Bisphenol A dimethacrylate" patented technology

A resin based material whose composition includes a light-curable mixture of monomers of no more than 35 wt. % of an ethoxylated difunctional bisphenol A dimethacrylate; of no more than 10 wt. % of a methacrylate monomer; of no more than 10 wt. % of a difunctional urethane acrylate; of no more than 0.1 wt. % of an optical brightener; of no more than 5 wt. % of silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm; of having more than 40 wt. % of an inert glass; of no more than 15 wt. % of a heavy metal oxide; of no more than 2.5 wt. % of an ultraviolet / visible (UV / Vis) light-photo-polymerization initiator; a colorant; and a stabilizer.

The invention discloses a tooth orthodontic bracket EGCG (epigallocatechin gallate)-based functional binder and a preparation method thereof in the field of binders. Comprising the following components in parts by weight: 25 to 30 parts of bisphenol A dimethacrylate, 15 to 20 parts of triethylene glycol dimethacrylate, 0.6 to 0.8 part of camphorquinone, 0.6 to 0.8 part of dimethylaminoethyl methacrylate, 3 to 5 parts of EGCG (epigallocatechin gallate) loaded nanoparticles and 6 to 8 parts of modified chitosan. Through the core structure design of loading EGCG (epigallocatechin gallate) on cationic nano silicon dioxide and coating modified chitosan for multiple times, the dual core advantages of accurate pH response controlled release and safe adaptation to the oral environment are realized in the application of the dental orthodontic bracket adhesive, the effect is supported by a clear mechanism, and release, bacteriostasis and toxicity test data verify that the dental orthodontic bracket adhesive has a good application prospect. The clinical application requirements are completely met.

The present invention relates to a 3D printing resin composition for a transparent aligner, a method for preparing same, and a transparent aligner formed by 3D printing using same, the composition comprising 5-20 wt% UDMA (urethane dimethacrylate), 40-70 wt% BIS-GMA (bisphenol A-glycidyl methacrylate), 8-30 wt% BIS-EMA (ethoxylated bisphenol A dimethacrylate), 2-5 wt% TEGDMA (triethylene glycol dimethacrylate), 8-9 wt% modified PVA powder, 5-9 wt% of a filler, 0.72-3.7 wt% of a curing agent, and 0.1-1.0 wt% of an additive, wherein the transparent aligner can be modified to have a structure optimized for the oral cavities of individual users, and thus can maximize the aligning effect.

The invention relates to a high-flexibility acrylic UV adhesive and a preparation process thereof, and relates to the technical field of adhesives. The UV-curable UV-curable coating is prepared from the following components in parts by mass: 30 to 40 parts of epoxy acrylate, 10 to 20 parts of urethane acrylate, 15 to 25 parts of modified acrylate, 5 to 10 parts of functional monomer, 1 to 2 parts of photoinitiator, 0.8 to 1.2 parts of antioxidant, 0.5 to 0.8 part of light stabilizer, 0.3 to 0.5 part of flatting agent and 0.3 to 0.5 part of defoaming agent, the modified acrylic ester is obtained by mixing polyether modified acrylic ester and heptadecaethoxy bisphenol A dimethacrylate; the functional monomer comprises lauric acid acrylate. The preparation process comprises the following steps: mixing the raw materials, heating and stirring for reaction, cooling, adding the photoinitiator under a dark condition, carrying out vacuum defoaming, filtering and discharging to obtain the high-flexibility acrylic UV adhesive. The acrylic acid UV adhesive has the effect of improving the flexibility, the adhesion property and the weather resistance of the acrylic acid UV adhesive.

This invention belongs to the field of sealing material technology, specifically relating to an anaerobic sealing liquid and its preparation method and application. The anaerobic sealing liquid comprises the following components by weight: 20-50 parts monomer, 0.5-2 parts initiator, 0.1-1 parts accelerator, and 0.1-1 parts co-accelerator. The monomer includes one or more of polyurethane acrylate, bisphenol A epoxy acrylate, (4) ethylene oxide bisphenol A dimethacrylate, triethylene glycol dimethacrylate, hydroxyethyl methacrylate, and hydroxypropyl methacrylate. Due to the rational formulation of monomers and various additives, the obtained anaerobic sealing liquid has a fast curing rate and excellent airtightness, pull-out resistance, storage stability, and corrosion resistance, meeting the airtightness requirements of pipe connection technology.