183 results about "Tert-butyl acrylate" patented technology

The invention relates to a hyper-branched polycarboxylate high-efficiency water reducing agent and a preparation method thereof. The water reducing agent is prepared by polymerizing one of tert-butyl acrylate and methyl tert-butyl acrylate with sodium methyl-acryl sulfonate and allyl polyethenoxy ether to form a copolymer main chain, and then performing condensation polymerization on one of acrylic acid and methacrylic acid with ethylene diamine to form a hyper-branched polyamide structure which is grafted to two ends of the main chain. The preparation method comprises the following steps: (1) preparing the sodium methyl-acryl sulfonate into solution with DMF, and heating the solution in a nitrogen atmosphere; (2) dissolving the other two monomers and an initiating agent into the DMF to prepare mixed solution, and dripping the mixed solution into the step (1) to react for 1 to 20 hours; (3) adding a condensating agent CDI after the reaction and performing condensation reaction by using N-methyl morpholine as an organic base, the ethylene diamine and the acrylic acid as the monomers and the DMF as a solvent; and (4) performing vacuum distillation to remove the residual monomers and the solvent, and refluxing for 2 to 5 hours by using methylene chloride solution of trifluoroacetic acid to obtain the water reducing agent. The hyper-branched polycarboxylate water reducing agent has the advantages of low admixture, high water reducing rate, small slump loss, good compatibility with cement, no corrosivity to steel bars, strong frost resistance and the like.

The present invention discloses preparation process of fluorine, silicon and epoxide modified low surface energy acrylate emulsion for heavy anti-corrosive paint. The modified acrylate emulsion is prepared with one or more of styrene, methyl methacylate, butyl acrylate, isobutyl acrylate, tert-butyl acrylate, etc as the main monomer and through introducing modifying fluorine, silicon and epoxide. The process of the present invention has simple operation and high yield, and the prepared emulsion has high water tolerance, high solvent tolerance, high acid and alkali resistance, high stability and capacity of forming film with surface energy as low as 15.5 mN/m.

The invention discloses polyhedral oligomeric silsesquioxane amphiphilic block copolymer and a preparation method thereof, and relates to macromolecular copolymer. Polyhedral oligomeric silsesquioxane POSS is taken as a hydrophobic block, and polyacrylic acid is taken as a hydrophilic block. The preparation method comprises the following steps of: adding a POSS monomer, a chain transfer agent andan initiator into a solvent, performing freeze degassing in a reaction container, and introducing argon into the reaction container, sealing for reaction, stopping the reaction until liquid nitrogen is frozen to obtain the hydrophobic block of polyhedral oligomeric silsesquioxane POSS; and adding tert-Butyl acrylate, an initiator and a solvent, performing freeze thawing degassing, introducing argon, sealing for polymerization, stopping the reaction until liquid nitrogen is frozen, removing unreacted tert-Butyl acrylate by using a dissolving precipitated method, adding a solvent for dilution, precipitating by using a precipitator, drying, stirring, soaking and purifying in an excessive selective solvent, filtering, drying to obtain polyhedral oligomeric silsesquioxane POSS-poly(tert-butyl acrylate) block copolymer, adding a cosolvent and an acidolysis reagent, and performing rotary evaporation to obtain the product.

The invention discloses an application of a block polymer as a dielectric elastomer. The structural general formula of the block polymer is B-C-D, wherein B and D are independently selected from a styrene homopolymer or a methyl methacrylate homopolymer; C is selected from a butyl acrylate homopolymer, a n-butyl acrylate homopolymer, a n-butyl methacrylate homopolymer, a isobutyl methacrylate homopolymer, a tert-butyl acrylate homopolymer, a 2-ethylhexyl acrylate homopolymer, an iso-octyl acrylate homopolymer, an ethyl acrylate homopolymer or a homopolymer of at least two kinds of butyl acrylate, n-butyl acrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, iso-octyl acrylate and ethyl acrylate. The block polymer can have larger deformation under high-frequency driving without swelling by a solvent and can be used as the dielectric elastomer.

The invention discloses a preparation technology of tert-butyl acrylate. Acrylic acid, isobutene, an acidic catalyst and a polymerization inhibitor undergo an esterification reaction at 40-120DEG C under 1.0-5.0MPa under an isobutene volume space velocity of 0.5-5.0/h according to a molar ratio of acrylic acid to isobutene of 1.0:1.0-5.0:1.0, the polymerization inhibitor comprises tert-butylcatechol, p-hydroxyanisole, 2,5-di-tert-butylhydroquinone and diphenylamine according to a weight ratio of 1:3:2:7, and the acidic catalyst is strong-acid cation exchange resin. The method can substantially improve the yield of tert-butyl acrylate.

The invention provides a preparation method of tert-butyl (methyl)acrylate. (Methyl)acrylic acid and isobutylene are subjected to addition reaction under the action of an acidic catalyst to generate the tert-butyl (methyl)acrylate. The technique belongs to an ideal atomic economic reaction, simplifies the process route, and needs fewer appliances. Besides, no byproduct is generated in the whole preparation process, so the method is a low-carbon environment-friendly technique. The adopted acidic catalyst is non-toxic and harmless, so the production process is environment-friendly. Therefore, the olefine acid addition esterification method can be widely used and is suitable for substituting the alkyd esterification method.

The invention provides a poly(tert-butyl acrylate)-b-polyethylene glycol-b-poly(tert-butyl acrylate) block copolymer. The block copolymer comprises a hydrophilic intermediate block and a hydrophobic end blocks, and has a formula (I) of A-b-B-b-A (I). A represents poly(tert-butyl acrylate) chain segment as the hydrophobic end blocks; B represents polyethylene glycol as the hydrophilic intermediate block; and b represents a group connecting A to B. The method is as below: acyl bromide polyethylene glycol acyl is used as an initiator to initiate an ATRP polymerization of tert-butyl acrylate. After targeting molecular modification, an end of a backbone chain of the block copolymer can be used as a targeting antitumor drug carrier.

The invention belongs to the field of coatings, and provides an ultraviolet photocuring coating containing inorganic pigment and filler. The ultraviolet photocuring coating comprises the following formulas in percent by mass: 40-70 percent of modified hyperbranched polyurethane acrylates, 2-5 percent of isocyanuric acid glycidyl ester, 3-5 percent of tert-butyl acrylate, 2-5 percent of octadecyl acrylate, 3-31 percent of acrylate-hydroxy ester, 1-2 percent of photoinitiators, 2-7 percent of auxiliaries and 9-13 percent of pigment and filler. A preparation method of the ultraviolet photocuring coating containing inorganic pigment and filler comprises the following steps that the reaction on long chain dihydric alcohol and an excessive amount of diisocyanate is carried out to synthesize a polymer I of an isocyanate group sealing side; the reaction on a certain amount of acrylate-hydroxy ester and the polymer I is carried out to synthesize a semi-additive substance Ii of which one end is isocyanate and the other end is double bond; hyperbranched polyester reaction on the semi-additive substance II and a fourth generation of BH40 is carried out. The ultraviolet photocuring coating containing inorganic pigment and filler has the advantages of high flexibility of coatings, high hardness and glossiness and capability of meeting the photocuring requirement on color film coatings used in the industry.

The invention discloses a carbon nanotube reinforced anti-oxidation geogrid, which is composed of the following raw materials in parts by weight: 1.6-2 calcium acetylacetonate, 0.7-1 alkenyl succinic anhydride, and 1-2 barium stearate , lithium aluminum hydride 0.1‑0.3, 4‑dimethylaminopyridine 0.3‑1, antioxidant 10100.4‑1, multi-walled carbon nanotubes 10‑15, antioxidant 1680.6‑1, polypropylene imine 10‑17, acrylic acid Tert-butyl ester 6-8, high-density polyethylene 140-160, bisphenol a diglycidyl ether 0.3-1, 2-mercaptobenzimidazole 0.6-1, dibutyl maleate 4-6, cycloalkane Lithium Oxide 0.4‑1. The invention greatly reduces the content of free radicals participating in the automatic oxidation chain reaction of polymers, delays the oxidation degradation process of polymers, and improves the oxidation resistance of finished materials.

The invention provides a process method for preparing (methyl) tert-butyl acrylate through a continuous method. According to the method, the (methyl) tert-butyl acrylate is continuously produced by utilizing a fixed bed reactor and a rectification device, a silica-loaded phosphorus vanadium and tungsten heteropoly acid serves as a catalyst, and tertiary butanol serves as an olefin polymerization inhibitor. By adoption of the process method, the reaction speed is high, the yield of the product is greatly increased, and the whole set of process is simple in steps, low in cost and pollution-free and accords with atomization economy.

The present invention discloses preparation of a 248 nm deep ultraviolet photoresist film forming resin based on a RAFT polymerization method, and belongs to the field of deep ultraviolet photoresists. According to the photoresist film forming resin, mainly 2-(dodecyl trithiocarbonate-yl)-2-methylpropanoic acid is adopted as a RAFT reagent, 4-acetoxy styrene, styrene, tert-butyl acrylate and 2-methyl-2-methacrylic acid adamantine ester are adopted as copolymerization monomers, 1-methoxy-2-propyl acetate is adopted as a reaction solvent to carry out solution polymerization under the condition of a free radical initiator so as to synthesize a low molecular weight distribution copolymer, a certain amount of sodium methoxide and methanol are added to carry out alcoholysis so as to obtain the copolymer having high transparency at 248 nm, and the copolymer is finally applied in the 248 nm photoresist. According to the present invention, the preparation is simple, the reaction conditions are mild, the molecular weight distribution of the obtained copolymer is narrow, the molecular weight can be well controlled, and the resin is suitable for 248 nm deep ultraviolet exposure.

The present invention relates to compositions having durable antimicrobial activity. The compositions include a carbonate/bicarbonate salt of a quaternary ammonium cation, an organic acid, hydrogen peroxide and a polymer. The polymer is selected from cationic amine polymer-epichlorohydrin adduct, cationic amine polymer-epichlorohydrin resin, poly(methacrylamidopropyltrimethylammonium)chloride, poly(bis(2-chloroethyl)ether-alt-1,3-bis(dimethylamino)propyl)urea, poly(diallyldimethylammonium)chloride, poly(t-butyl acrylate co-ethyl acrylate co-methacrylic acid), polyethylene oxide, polyquaternium-16, polyquaternium-22, polyquaternium-67 and mixtures thereof.

The invention discloses a hydrophilic modifier for polyethylene films and a preparation method thereof. The invention is characterized by using a long-chain alpha-olefin-tert butyl acrylate copolymer as a matrix and grafting polyethylene glycol with hydroxyl at one terminal onto a copolymer chain through hydrolysis and esterification. Such molecular structures as graft density and branched chain length of the graft copolymer can be effectively controlled through the method. The method is simple in process and convenient to operate. The hydrophilicity of the surfaces of the polyethylene films can be substantially improved by coating the modifier on the surfaces of the polyethylene films, and the modifier is firmly jointed with the polyethylene films and is not easy to run off because of being scoured by water. The hydrophilic modifier can be used for preparing long-acting antifogging polyethylene films.

The invention provides a pollution-resistant epoxy-polyester powder paint flatting agent and a preparation method thereof. The pollution-resistant epoxy-polyester powder paint flatting agent is composed of 15-50 wt% of wax or wax analog, 3-10 wt% of metallic salt or organometallic complex and 40-80 wt% of acrylic resin, wherein the acrylic resin contains 40-70 wt% of tert-butyl acrylate and (or) tert-butyl methacrylate. The flatting agent is prepared by proportionally pulverizing and mixing the synthetic acrylic resin, wax or wax analog and metallic salt or organometallic complex at normal temperature. The flatting agent can enable the epoxy-polyester powder paint to simultaneously have the application effects of pollution resistance and flatting.

The invention discloses a wear-resistant resin spectacle lens and a preparation process thereof. The raw materials are: polymethyl methacrylate, bisphenol A polycarbonate, silicone acrylic resin, poly(tert-butyl acrylate), linear low-density polyethylene, Oxazoline, catechol, β-naphthylamine, dodecyl dihydroxyethyl betaine; the preparation process is: polymethyl methacrylate, bisphenol A polycarbonate, silicone acrylic resin and poly Put tert-butyl acrylate into the hopper of the twin-screw extruder after mixing with linear low-density polyethylene for melt-mixing and granulation; add oxazoline, catechol, and β-naphthalene to the hopper of the lens injection machine in sequence The amine and dodecyl dihydroxyethyl betaine are heated to obtain a molten mixture, and then injection molding is performed to obtain a preform; the preform is cured to obtain a molded part, and after post-treatment, the wear-resistant resin spectacle lens is obtained. The resin spectacle lens prepared by the invention is light in weight, comfortable to wear, high in refractive index of the lens, high in light transmittance, wear-resistant and scratch-proof, and long in service life.

The invention relates to a synthetic method of a slippery water fracturing degradable diverting agent. Lactic acid (LA) is a monomer, stannous octoate (Sn (Oct) )(2) is used as an initiator, and polylactic acid (PLA) with carboxyl at the tail end is synthesized under the protection of nitrogen; tert-butyl acrylate (TBA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) are used as functional monomers, carboxylic azo compound (4,4'-azobis(4-cyano valeric acid)) is used as an initiator, and oligomer (AMPS-TBA) with carboxyl group at the tail end is synthesized under the protection of nitrogen; the polylactic acid (PLA) with carboxyl at the tail end, the oligomer (AMPS-TBA) with carboxyl group at the tail end and a starch solution are mixed, graft copolymerization is performed by using concentrated sulfuric acid as a catalyst; the grafted copolymer product is granulated and dried to obtain solid particles which are the slippery water fracturing degradable diverting agent. The prepared slippery water fracturing degradable temporary plugging diverting agent has the advantages of being easy to degrade, good in flowback performance, high in temporary plugging strength and environment-friendly in raw materials.

The present invention relates to copolymers, which comprises, in copolymerized form, between 25 and 80% by weight of tert-butyl(meth)acrylate, 2 to 60% by weight of hydroxyalkyl(meth)acrylate, 10 to 40% by weight of an anionic or anionogenic, free-radically polymerizable, olefinically unsaturated compound which is or comprises methacrylic acid, and, if appropriate, up to 30% by weight of a further free-radically polymerizable, olefinically unsaturated compound. In addition, the present invention relates to the use of such copolymers in cosmetic preparations, and to such cosmetic preparations per se.

A preparation for treating keratin fibers, especially to a cosmetic hair fixative which contains a) at least one cationic amphoteric polymer, constituted of the monomers vinylpyrrolidone, tert. butyl acrylate, methacrylic acid, dimethylaminopropyl methacrylamide and methacryloylethyldimethylethyl ammonium ethyl sulfate, wherein the portion of the methacrylic acid being lower than the portion of the dimethylaminopropyl methacrylamide and the polymer being neutralized with an appropriate acid, b) at least one non-ionic polymer and c) at least one silicon oil.