3 results about "Methylisothiazolinone" patented technology

This invention relates to the field of oilfield chemical technology, specifically to a salt-resistant thickener for fracturing and its preparation process, comprising the following raw materials: multifunctional salt-resistant modified guar gum, organoboron crosslinking agent, potassium chloride, alkyl glycoside, sodium carbonate, methylisothiazolinone, and deionized water. In this invention, the multifunctional salt-resistant modified guar gum forms hydroxyl active sites through alkaline activation, introduces sulfonic acid groups, and grafts cationic monomers onto the guar gum backbone. The sulfonic acid groups enhance the hydration capacity and resistance to electrolyte interference of the molecular chain, maintaining the extension of the molecular chain. The introduction of appropriate cationic groups can improve the conformation of the molecular chain to a certain extent, avoiding increased charge shielding effect that leads to molecular chain contraction. This allows the fracturing fluid to maintain superior solubility and stable viscosity in high-salt, high-hardness formation water environments, enhancing its salt resistance and hard water resistance.

This invention discloses a perming composition based on thermosensitive regulation, comprising the following components: an aqueous phase including disodium EDTA, urea, glycerin, methylparaben, propylparaben, and phenoxyethanol; a reducing buffer phase including cysteine ​​hydrochloride, cysteine, sodium bicarbonate, ammonium carbonate, and ammonia; an emulsified oil phase including caprylic / capric triglyceride, polydimethylsiloxane, sodium lauroyl glutamate, cocamidopropyl betaine, and PEG-40 hydrogenated castor oil; an active repair phase including phosphatidylcholine, hydrogenated lecithin, ceramide, tocopherol, ascorbyl palmitate, ethoxydiethylene glycol, p-hydroxyacetophenone, and 1,2-hexanediol; a conditioning and repair phase including hydrolyzed keratin, arginine, methylisothiazolinone, and a daily fragrance; and the remainder being deionized water. This invention simplifies the judgment and operation process of softening through the synergistic effect of thermosensitive regulation and the cysteine-based reducing system. This invention also includes a method for preparing the perming composition.

The present invention provides a wafer cleaning solution and a method for producing the same. [Solution] The wafer cleaning solution comprises a nonionic surfactant, an anionic surfactant, an antibacterial agent, a pH adjuster, and water. The number-average molecular weight of the nonionic surfactant is 3,000 to 6,000. The anionic surfactant is selected from at least one of the group consisting of sodium lauryl sulfate and polyethylene glycol tridecyl ether phosphate. The acid dissociation constant (pKa) of the pH adjuster is 1.38 to 4.76. The antibacterial agent is selected from at least one of the group consisting of kathon, methylisothiazolinone, triclosan, chloroxyllenol, methacrylate oxide decylpyridinium bromide salt, and quaternary ammonium salt compounds.