866 results about "Acetic Acid Esters" patented technology

Disclosed are filter elements constructed of a filter support material coated with an acetoacetate-functional polymeric composition that reacts with and removes aldehydes, especially formaldehyde, present in gases such as air. Also disclosed are methods for the removal of aldehydes utilizing the coated filter support materials.

A personal cleansing composition exhibiting enhanced skin feel (i.e., enhanced skin softness, reduced skin irritation, reduced residue, and reduced greasy, tacky, or tight skin feel), enhanced foaming and lather, and good cleansing, more specifically, a personal cleansing composition comprising a mixture of alpha sulfonated alkyl esters or sulfonated fatty acids, or salts thereof, with an alkyl sulfoacetate or ethoxylated alkyl sulfoacetate, or salts thereof, secondary surfactants, and optional additives.

A photoresist stripper composition is made up of a mixture of an acetic acid ester, gamma-butyrolactone (GBL), and a non-acetate ester or a poly alkyl alcohol derivative. The acetic acid ester may be at least one of n-butyl acetate, amyl acetate, ethyl aceto-acetate, and isopropyl acetate. The non-acetate ester may be at least one of ethyl lactate (EL), ethyl-3-ethoxy propionate (EEP) and methyl-3-methoxy (MMP). The poly alkyl alcohol derivative may be at least one of propylene glycol monomethyl ester (PGME) and propylene glycol monomethyl ester acetate (PGMEA).

This invention provides a process for producing a 5-hydroxy-3-oxopentanoic acid, a useful pharmaceutical intermediate, easily from a readily available, inexpensive starting material without using any extraordinary production equipment such as a very-low-temperature reactor.Thus, this invention provides a process for producing a 5-hydroxy-3-oxopentanoic acidwhich comprises permitting a lithium amide to act upon a mixture of an acetic acid ester and a 3-hydroxypropionic acid derivative at not below -20° C.Further, this invention also provides a process for producing a 5-hydroxy-3-oxopentanoic acidwhich comprises treating a mixture of an acetic acid ester and a 3-hydroxypropionic acid derivative with a Grignard reagent to prepare a mixture of a compound and an acetic acid ester of the above formula (I),and permitting a lithium amide to act upon the mixture at a temperature not below -20° C.

The invention provides a novel empoasca vitis gothe attractant formula and application of the novel empoasca vitis gothe attractant. The application method comprises the following steps: mainly preparing the attractant by the following components including tea tree volatile matters trans-2-hexenal, cis-3-hexene-1-ol and cis-3-hexenyl acetate, geraniol, linalool and trans-ocimene as components of the attractant and an additional antioxidant 2, 6-butylated hydroxytoluene (BHT) in a weight ratio of (0.5-5.0):(10-20):(1.0-15):(5.0-15):(30-40):(1.0-15):(1.0-10); loading the attractant on a silicone rubber head to prepare a lure; and embedding the lure on a yellow sticky colored card to form a trap of empoasca vitis gothe. Imago of empoasca vitis gothe is trapped in a stable stage of trapping, preventing and treating the empoasca vitis gothe, so that the quantity of the empoasca vitis gothe can be effectively restricted. Researches show that the lure with the novel empoasca vitis gothe attractant can obviously enhance the trapping and killing effects of a single yellow sticky colored card, the lasting trapping capacity of the trap to the empoasca vitis gothe can be remarkably improved, the service period of the trap is remarkably prolonged, and use of chemical pesticides in the tea garden is remarkably reduced and cancelled. The attractant applied to the tea garden has the advantages of convenience in use, safety, greenness and no pollution and meets the national green prevention and control principle, thereby accelerating the industrial development of organic tea gardens.

The invention discloses a saccharomyces cerevisiae strain with high yield of ester and low yield of higher alcohol as well as a building method of the saccharomyces cerevisiae strain, and belongs to the technical field of bioengineering. According to the building method provided by the invention, through completely knocking out an amino acid transaminase gene BAT2 and an ester hydrolase gene IAH1 in an original strain, and selecting a strong promoter PGK1 over-expression alcohol acetyltransferase I gene ATF1 at the same time, the saccharomyces cerevisiae strain with high yield of ester and low yield of higher alcohol is obtained. Compared with a parent strain, other fermentation performances of built recombinant bacteria are not affected, the total quantity of acetic acid ester is obviously increased and reaches 1303.6mg/L, wherein the content of ethyl acetate is 52 times that of the original strain, isoamyl acetate is increased to 73.7mg/L, the content of main higher alcohol is 151.8mg/L and is reduced by 61.4 percent in comparison with that of the original strain. By using the saccharomyces cerevisiae, ester yield is significantly increased while the higher alcohol yield is reduced, the higher requirements of white spirit related fields on yeast are met and the application prospect is wide.

The invention relates to a single-component polyurethane sealant capable of quickly curing moisture and a preparation method thereof. The polyurethane sealant comprises the following raw materials in percentage by weight: 10 to 20 percent of polyisocyanate monomer, 20 to 45 percent of polyether polyol, 1 to 10 percent of acetoacetic ester sealed end polyether prepolymer, 5 to 20 percent of plasticizer, 25 to 40 percent of modified mineral powder, 1 to 5 percent of latent curing agent, 0.1 to 2 percent of cyclodextrin wrapped environment-friendly catalyst, 0.1 to 1 percent of defoaming agent and 0.1 to 1 percent of water-removing agent, wherein the water-removing agent is one or more of mono-isocyanate compound or functionalized silane compound. The single-component polyurethane sealant avoids bubble fundamentally, can be quickly cured, is stable in storage, and can be applied to construction on damp interfaces.

The invention discloses a preparation method of 2-(4-haloethyl) phenyl-2-methyl propionic ester and a synthesis method of bilastine, which comprises the following steps of: carrying out acylation reaction on 2, 2-dimethyl phenylacetate and halogen acetyl halides under the action of catalyst, to generate 2-(4-halogen acetyl) phenyl-2-methyl propionic ester; carrying out kishner-wolff-huang reduction reaction on the 2-(4-halogen acetyl) phenyl-2-methyl propionic ester, to reduce the carbonyl so as to generate the 2-(4-haloethyl) phenyl-2-methyl propionic ester; having condensation reaction with 1-ethoxy ethyl-2-pyridine-4-group benzimidazole by taking the 2-(4-haloethyl) phenyl-2-methyl propionic ester as a midbody to obtain esterified bilastine; and hydrolyzing, to generate the bilastine. The novel synthesis method of the bilastine provided by the invention can easily obtain raw materials, and is simple to operate, lower in cost, environment-friendly, and completely suitable for the industrial production.

The invention relates to a preparation method of alkyd resin. The preparation method comprises the following specific steps: (1) adding neopentyl glycol, trihydroxymethyl propane, phthalic anhydride, hydrogenated phthalic anhydride and antioxidant to a reaction container, and heating to carry out melt esterification on the materials at the temperature of 200-240 DEG C; (2) when esterification is carried out to an acid value being 40-45 mgKOH/g, cooling to 120-160 DEG C, and adding short-chain synthetic fatty acid and an aliphatic hydrocarbon solvent; (3) heating to carry out reflux esterification at the temperature of 180-200 DEG C, and diluting with acetic acid ester organic solvent when the acid value is smaller than or equal to 8 mgKOH/g; and (4) cooling to 100 DEG C and filtering to obtain alkyd resin. The paint prepared from the alkyd resin obtained in the invention and nitrocellulose has the characteristics of rapid drying, high hardness, good fullness, good adhesion force, and good water resistance.

Disposable test strips and a wet chemistry method for measuring each of beta-hydroxybutyrate alone, combined beta-hydroxybutyrate and acetoacetate or total ketone bodies (i.e., beta-hydroxybutyrate, acetoacetate and acetone) in human bodily fluid samples, including but not limited to urine, saliva or sweat are described. The test strips need only be dipped in the sample and can be used by anyone in almost any milieu. Measurement can be made electrochemically, spectrophotometrically, fluorometrically or by comparision to a color standard. Combined acetoacetate and beta-hydroxybutyrate which account for 97-98% of total ketone bodies and may be measured in a cyclic reaction that occurs at pH about 7.0 to about 8.3 with beta-hydroxybutyrate dehydrogenase, (beta-HBD), nicotinamide adenine dinucleotide, a tetrazolium dye precursor and an electron mediator. Using this reaction, false positive results obtained from urine samples taken from patients on sulfhydryl drugs are avoided. beta-HBD from some sources was found to cause false negative results in samples (e.g. urine) containing high chloride content due to chloride inhibition of beta-HBD. Using a simple test for chloride inhibition, it was found that beta-HBD from Alcaligenes is not so inhibited. Using either beta-HBD that is not inhibited by chloride or using 10-20 times the normal concentration of this enzyme eliminates false negatives in samples having substantial chloride content, such as urine, both in the reaction described above and in other reactions disclosed for measuring each of beta-hydroxybutyrate alone, combined beta-hydroxybutyrate and acetoacetate and total ketone bodies, all of which reactions occur in the pH range of about 8.6 to about 9.5.

The invention discloses a diesel oil pour point depressant composition and its preparation method. The diesel oil pour point depressant composition, i.e. a diesel oil pour point depressant composition formed by mixing acetic ester organic solvents with a pour point depressant, comprises the following raw materials by mass percent: 0-20% of methyl acetate, 0-20% of ethyl acetate, 0-10% of propyl acetate, 0-30% of butyl acetate, and 20-80% of the pour point depressant. The preparation method consists of: mixing all the raw materials and then conducting stirring in water bath at a constant temperature of 50DEG C for 20min, and controlling the rotation speed at 150r/min, thus obtaining the diesel oil pour point depressant composition. Adding of the obtained diesel oil pour point depressant composition into commercially available 0# diesel oil can make the cold filter plugging point of the diesel oil reduced by 5-11DEG C and the condensation point reduced by 6-10DEG C. The diesel oil pour point depressant composition provided in the invention enhances the dispersion effect of pour point depressants on wax crystals, and improves the low temperature fluidity of diesel oil.

The invention discloses a composite multi-functional two-component aqueous wood white top coat, which comprises a component A, a component B and water according to a mass part ratio of 100:20-25:10-20, wherein the component A is prepared from the following raw materials by mass: an aqueous hydroxy acrylic acid resin, a compound modified self-cross-linking acrylic acid polymer, an aqueous titanium white slurry, an aqueous matting agent, a defoamer, a wetting agent, a thickening agent, a dispersant, a leveling agent, an anti-mildew bactericidal agent, and the balance of water, and the component B is prepared from the following raw materials by mass: hydrophilic aliphatic polyisocyanate and propylene glycol methyl ether acetic acid ester. The composite multi-functional two-component aqueous wood white top coat of the present invention has advantages of good antibacterial effect, good aldehyde removing effect, good stain resistance, environmental protection, good hardness, high fullness, and moderate cost.

The invention provides composition for moisturizing and nourishing eye serum. The composition comprises effective components in parts by weight as follows: jojoba seed oil, squalene, avocado tree fruit ester, a xanthan gum/glucose/chondrus crispus extract, mycose, acetyl tetrapeptide, a rhodiola extraction solution, tocopheryl acetate, sodium hyaluronate, decarboxy carnosine HCL, a kudzuvine root extract and a glycyrrhiza glabra root extract. The composition is applied to the eye serum, can nurse the delicate skin around eyes, can realize lasting moisturizing and water supplement effects, and can activate blood around the eyes, obviously improve black eyes and smooth dry lines of the eyes after being used for a long time.