One method of application in PICA applications is to apply the silane as a primer on the inorganic substrate before the coating is applied. When used as a primer, the silane is diluted in a solvent and sprayed, dipped or wiped onto the substrate. Various solvents can be used: methanol, ethanol, isopropanol, an ether glycol, or sometimes a mixture of solvents. Water, at levels of 1–5%, is usually added to an alcohol solvent to promote hydrolysis of the silane in the primer. Water can also be used as the solvent if the coupling agent is water soluble, as with an aminosilane.
View MoreLiquid silicone rubber (LSR) is a biocompatible silicone that can be pumped as a two-component liquid into a mold, before being cured to form a solid.
View MoreIn order for a silicone oil to be functional and qualitatively valid, it must be pure in terms of the raw material used, only in this way can it express all its incredible functionality.
View MoreMost of the widely used organosilanes have one organic substituent and three hydrolyzable substituents. In the vast majority of surface treatment applications, the alkoxy groups of the trialkoxysilanes are hydrolyzed to form silanol-containing species. Reaction of these silanes involves four steps.
View MoreCross-linking is a process where a polymer chain on the shell material is linked to another polymer chain through a chemical bond.
View MoreCross-linking and modification of various thermoplastics (polyethylene, polyvinyl chloride, chlorinated polyethylene, EVA, polystyrene, etc.) Thermal crosslinking is generally 1-3%, plus dicumyl peroxide(DCP) is 0.2-1%; radiation crosslinking is 0.5-2%, and DCP is no longer needed.
View MoreModification of epoxy resin and DAP(diallyl phthalate) resin. It can improve heat resistance, adhesion, mechanical strength and dimensional stability. It is typically used for modification of epoxy potting materials and encapsulating materials.
View MoreThe main aim of this review is to assess the potential use of natural cross-linking agents, such as genipin, citric acid, tannic acid, epigallocatechin gallate, and vanillin in preparing chemically cross-linked hydrogels for the biomedical, pharmaceutical, and cosmetic industries.
View MoreCrosslinking agent, also known as crosslinking agent, is an important part of polyhydrocarbon photoresist. The photochemical curing effect of this photoresist depends on the crosslinking agent with dual photosensitive functional groups to participate in the reaction., The cross-linking agent produces double free radicals after exposure, which interacts with polyhydrocarbon resins to form bridges between polymer molecular chains and become insoluble substances with a three-dimensional structure.
View MoreAnother unusual complication of silicone oil is migration of the oil away from the vitreous cavity. In some cases silicone oil has been reported to migrate along the optic nerve, usually in eyes with elevated intraocular pressure and glaucomatous cupping. One patient developed a hemianopsia in the contralateral eye after migration of silicone oil to the optic chiasm.34 In this case, the patient had elevated intraocular pressure with total cupping of the optic nerve in the oil-filled eye. Neurosurgical evacuation of oil from the chiasm led to improvement in the visual field defect. In other cases, neuroimaging has indicated the presence of silicone in the brain.36,80
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