143 results about "Alkenylsuccinic anhydride" patented technology

An overbased magnesium composition deposit control additive for residual fuel oils and turbine fuels is an overbased magnesium sulfonate, carboxylate or phenate or mixtures thereof containing at least 14% and upwards to about 18% by weight of magnesium and containing a succinic anhydride and lower carboxylic acid co-promoter reaction product. The additive when added to fuel oils, such as residual fuel oils containing high asphaltenes, reduces, if not eliminates, magnesium/asphaltene deposits or sediment and the consequential plugging of filters. The additive also reduces, if not eliminates, vanadium caused corrosion in the turbine. The invention is also the process for preparing the overbased composition or deposit control additive, wherein the overbasing reaction incorporates the combination of a lower carboxylic acid, preferably acetic acid and a succinic anhydride, preferably dodecenyl succinic anhydride (DDSA), as the co-promoter.

The invention provides latex for papermaking. The latex contains starch, oxidants, hydrophobic modifying agents and water, wherein the dosage of the oxidants is 7-10% of the mass of starch; the dosage of the hydrophobic modifying agents is 5-20% of the mass of the starch; the hydrophobic modifying agents are selected from at least one of dodecenyl succinic anhydride, maleic anhydride, epoxy chloropropane, an alkyl ketene dimmer, alkenyl succinic anhydride, a styrene-acrylate copolymer, a silane coupling agent and a titanate coupling agent. The invention also provides a preparation method of the latex for papermaking and a coating containing the latex for papermaking. The problems that the wet strength of finished paper is poor and dusting happens easily because the paper is coated with the starch-based latex for papermaking in existing processes are solved.

A method of sizing paper for use in applications which require resistance to liquids comprising incorporating in the paper a size composition comprising one or more alkenyl succinic anhydride (ASA) compounds prepared from the reaction of maleic anhydride and one or more substantially symmetrical C₂₀-C₂₈ internal olefins.

The present invention provides a method for producing a resin composition, which, by means of simple steps, can uniformly disperse microfibrillated plant fiber in a highly hydrophobic resin and can impart enhanced mechanical strength to a molding material obtained by molding the resin composition. The present invention further provides a resin composition having excellent heat resistance and low linear thermal expansion. The present invention relates to a method for producing a resin composition, the method including a step of mixing a thermoplastic resin or thermosetting resin (A), and modified plant fiber (b) or modified microfibrillated plant fiber (B), in the presence of an organic liquid (C), the modified plant fiber (b) or modified microfibrillated plant fiber (B) being obtained by modification with an alkyl or alkenyl succinic anhydride in a liquid capable of swelling microfibrillated plant fiber (B′) or plant fiber (b).

The invention discloses a preparation method for hydrophobic thermoplastic starch with alkenyl succinic anhydride, which comprises the steps that: firstly starch and alkenyl succinic anhydride (ASA) are added in a high-speed mixer and mixed for 2 to 10 minutes; then the mixture is sealed and deposited for 4 to 12 hours, and is extruded from a screw plastic extruder to obtain the hydrophobic thermoplastic starch. The preparation method for hydrophobic thermoplastic starch with alkenyl succinic anhydride has the advantages that since the adopted alkenyl succinic anhydride (ASA) has long fatty hydrocarbon chains (C14 to C18) and five-membered anhydride rings, and can react with the hydroxy in the starch to form the ester bond, the introduced long fatty hydrocarbon chains also have the good internal plasticization effect while having the excellent hydrophobic property; and not only recrystallization of the starch is avoided, but also hydrophobic property of the thermoplastic starch can be obviously improved.

The invention discloses a method for preparing starch alkyl glycoside surfactant. The method adopts the following steps of: (1) grinding the starch by a mechanical ball-milling method and performing enzymolysis treatment and oxidation modification on the starch to obtain oxidized starch; and (2) reacting the oxidized starch with one or more of dodecenyl succinic anhydride, octenyl succinic anhydride and cationic etherifying agent to obtain the starch alkyl glycoside surfactant. The starch alkyl coside surfactant prepared by the method of the invention has the advantages of good surface activity, proper viscosity, moderate foam or low foam, natural raw materials, reproducibility, no toxicity, little skin irritation, easy biological degradation, safe use, and the like, which has wide application prospect.

The invention discloses a method for synthesizing composite modified starch slurry, belonging to the technical field of methods for synthesizing the modified starch slurry applied to starching of spinning warps. The method comprises the following steps of: firstly carrying out positive ion modification on starch by utilizing quaternary ammonium type positive ion etherifying agent 3-chlorine-2-hydroxypropyltrimethylammonium chloride to synthesize positive ion starch, and carrying out an esterification reaction between the synthesized positive ion starch and dodecenylsuccinic anhydride so as to synthesize positive ion-dodecenylsuccinate composite modified starch slurry. According to the method for synthesizing the composite modified starch slurry, disclosed by the invention, positive ion groups and ester group which is large in volume and provided with vinyl group are introduced in a starch macromolecular chain so that film performances of the starch slurry is remarkably modified, and adhesion performance of the slurry to synthetic fibers such as terylene can be improved, thus starching requirements of warps, especially the terylene and the like, are better met. The method for synthesizing the composite modified starch slurry, disclosed by the invention, can be used for starching warps of fibers such as cotton, linen, mucilage glue and terylene/cotton, terylene/linen, terylene/mucilage glue through a common sizing machine or a high-speed sizing machine.

The invention belongs to the technical field of preparation of starch, belongs to the technical field of preparation of modified starch, and in particular relates to a method for preparing octenyl succinic acid modified starch and application thereof. The method comprises the following steps of: drying the starch serving as a raw material and performing constant weight of the starch to reach a certain water content; grinding the starch to obtain activated starch; adding distilled water into the starch to oscillate and adding alkali to regulate pH; slowly adding octenyl succinic acid (OSA) into the starch; adding acid to neutralize after the reaction is finished; performing alcohol washing on the mixture; centrifugally collecting wet starch; drying the wet starch; pulverizing the wet starch; and screening to obtain the octenyl succinic acid modified starch. The method is characterized in that the raw material starch is mechanically activated before esterification reaction is carried out; and the reaction activity of the starch is increased, the substitution degree of the OSA is increased, the reaction time is shortened, the using amount of the alkali is reduced, and the production of the octenyl succinic acid modified starch is facilitated in a ball milling mode. The method can be used for food, such as starch glue, microcapsule wall materials, yoghourt, steamed sponge cakes, cakes and the like.

Topically applicable, solid UV-photoprotecting compositions suited for the UV-photoprotection and/or makeup and/or care of the lips and/or the face, advantageously shaped as sticks, contain a) at least one fatty phase, a UV-photoprotecting amount of b) at least one organic UV-screening agent and c) a fraction of metal oxide mineral nanopigments, and d) an SPF-increasing amount of at least one octenylsuccinic anhydride-esterified starch salt, formulated into a physiologically acceptable medium therefor.

The invention discloses a method for preparing low-viscosity amphoteric starch. The method comprises the following steps: mixing native starch, adding alkali liquor, and feeding 3-chloro-2-hydroxypropyltrimethyl ammonium chloride to perform a cationic etherification reaction for 8.0-24.0 hours; feeding an oxidant solution to oxidize for 3.0-6.0 hours, and adding a reducing agent for reduction; feeding alkenyl succinic anhydride to esterify for 8.0-20.0 hours; neutralizing by a hydrochloric solution, removing liquid, washing, dehydrating, pneumatically drying, cooling and packaging to obtain the product of low-viscosity amphoteric starch. Series of products prepared by the method have electric charge characteristics of anions and cations with different surface activities and different quantitative proportions, as well as different viscosity and mobility ranges, has the advantages of multiple functions and wide application range, and is applicable to non-food industrial applications, such as pesticide, daily-use chemical thickening agents, emulsifiers or microcapsule embedding materials with good effect.

The invention provides a preparation method of modified starch nanocrystal, belonging to the technical field of the development of modified starch. The principle of the preparation method provided by the inversion is based on the situation that the difference of the acid tolerance is caused by the hemi-crystal capability of a starch structure, an amorphous region of starch particles is restrictively hydrolyzed by dilute acid, and the acid-resistant starch microcrystal particles can be formed, wherein the sizes of the acid-resistant starch microcrystal particles are 10-100nm. The particles are ultramicro, so that the particles are easily absorbed onto an oil-water interface, and have a certain surface activity, and the surface activity of the particles can be greatly improved after the particles are modified on surfaces in an esterification way by the DDSA (dodecenly succinic anhydride) through an enzymic method. 0.5% of the modified nanocrystal is added, so that a water and weak-polarity methylbenzene (1:1) oil-water system can form stable O/W type emulsion, the emulsifying capacity reaches 76%, and the median diameter of the emulsion D50=55 microns; after the emulsion is placed for four months under room temperature (0.2% of sodium azide bacteriostat is added), the particle size distribution of the emulsion can not be obviously changed. The modified starch nanocrystal prepared by the preparation method provided by the invention is high in emulsifying capacity, and high in emulsifying stability, thereby being wide in industrial application prospect.

The invention relates to an anti-counterfeit coating of magnetic fluorescent paper and a preparation method thereof, and belongs to the technical field of anti-counterfeit coatings. The anti-counterfeit coating of magnetic fluorescent paper provided by the invention comprises carbon quantum dots, nano magnetic particles and octadecenyl succinic anhydride. The carbon quantum dots, nano magnetic particles and octadecenyl succinic anhydride are combined to obtain an emulsion with good emulsion stability performance without adding an emulsion stabilizer. The emulsion can be used as an external sizing agent which is directly coated on the surface of paper. Therefore, the anti-counterfeit coating of magnetic fluorescent paper provided by the invention has magnetism and anti-counterfeiting performance, and can be used for improving the performances of paper such as smoothness, whiteness and water resistance. Furthermore, by adopting the anti-counterfeit coating of magnetic fluorescent paper provided by the invention, the sizing agent is not added in the papermaking process, so that the preparation step is simplified and the production cost is lowered. In addition, the anti-counterfeit coating of magnetic fluorescent paper provided by the invention has the advantages of good emulsion stability performance and high sizing efficiency.

The invention relates to an alkenyl succinic anhydride-modified guar gum fracturing liquid thickening agent and a preparation method thereof. The conventional epoxy propane for modified guar gum has low boiling point, the raw materials are not easily obtained, the reaction process is complex, and the quality of the product is not easily controlled. The preparation method of the alkenyl succinic anhydride-modified guar gum fracturing liquid thickening agent sequentially comprises the following steps of: mixing 100 grams of guar gum powder and 10 to 15 grams of alkenyl succinic anhydride uniformly; preparing salt solution containing 10 mass percent of sodium carbonate and 5 mass percent of sodium chloride; adding 20 to 25 grams of salt solution into the mixture of the guar gum and the alkenyl succinic anhydride with stirring by a spraying method, and performing constant-temperature closed reaction for 2 to 4 hours at the temperature of between 40 and 60 DEG C; and washing the reaction product by using 100 to 150 grams of alcohol after the reaction is finished, and drying the reaction product. The residue content of the gum breaking liquid is low, secondary damage to the stratum is reduced, and the fracturing construction effect is promoted.

The invention discloses a preparation method of low viscosity octenyl succinic anhydride modified starch (OSA-starch) by oxidative degradation and enzymolysis. The method comprises the following steps: pulping original starch, adding alkali liquor, feeding alkenyl succinic anhydride for esterification, and reacting for 6.0-20.0 hours; feeding a calcium hypochlorite solution for oxidization, and reacting for 2.0-4.0 hours; carrying out high-heat treatment for continuous injection, and insulating by a laminar flow; cooling, reducing by a reducing agent, then adding an oxalic acid solution, stirring and neutralizing to adjust the pH value, and adding pullulanase for debranched enzymolysis; adding active carbon, raising temperature and decoloring, and carrying out filter pressing; and carrying out vacuum concentration on the filtrate, finely filtering, spray-drying, cooling and packaging to obtain a water soluble low viscosity OSA-starch product which is suitable for emulsifiers or microcapsule embedding materials for chemical products such as pesticides, articles for daily use, and the like.

An oil-resistant sheet material is provided which has low resistance to air permeability and excellent oil resistance, and particularly can be suitably used as a packaging material for food containing edible oil. The oil-resistant sheet material includes at least one coating layer that contains starch and alkyl ketene dimer and/or alkenylsuccinic anhydride on at least one side of a substrate in a solid content of 1.5 to 20 g/cm². When the coating layer further contains a crosslinking agent, the oil resistance is improved.

The invention discloses hard-film rust preventive oil. The hard-film rust preventive oil comprises, by weight, 63-70 parts of solvent oil 120#, 10-14 parts of barium soap of petroleum ester oxide, 1-2 parts of tert-butyldiphenylchlorosilane, 0.7-1.4 parts of tetradecanol oleate, 3-5 parts of polyoxyethylene stearate, 1-2 parts of N-phenyl-2-naphthylamine, 2-3 parts of oleic acid, 1-2 parts of 6-tert-butylorthocresol, 0.6-1 part of anhydrous ethanol, 2-3 parts of dodecenyl succinic anhydride, 0.6-1.3 parts of decabromodiphenylethane and 10-15 parts of a film-forming assistant. A film with the hard-film rust preventive oil has high hardness, good transparency, good corrosion resistance, salt mist resistance and damp-heat resistance. The used film-forming assistant can effectively improve film-forming effects, improve adhesive ability, and prevent shedding and cracking.

The invention provides an indoor formaldehyde decomposition paper surface gypsum plaster board and a preparation method thereof. The indoor formaldehyde decomposition paper surface gypsum plaster board is composed of a sandwich layer and formaldehyde decomposition surface covering paper sticking to the two sides of the sandwich layer, the preparation method of the sandwich layer comprises the steps that after building plaster, a fiber reinforced material, an addition agent and water are fully mixed and evenly stirred, an octenyl succinic anhydride alcohol solution is added, stirring and mixingevenly are carried out to prepare seriflux, the seriflux is molded to obtain the sandwich layer; the formaldehyde decomposition surface covering paper is prepared according to a conventional paper production technology after a formaldehyde decomposing agent turbid liquid and pulp are evenly mixed or by directly spraying the formaldehyde decomposing agent turbid liquid on common surface covering paper. The indoor formaldehyde decomposition paper surface gypsum plaster board and the preparation method thereof have the advantages that not only can formaldehyde, benzene, TVOC and other pollutantsin the environment be efficiently and durably removed, but also heavy metal ions and other harmful pollutants in the environment can be efficiently adsorbed, secondary pollution cannot be generated,the preparation method is simple, the cost is low, the purification efficiency of the formaldehyde reaches to 75% or above, and the durability of the purification effect of the formaldehyde is greaterthan 60%.

The invention relates to a transfer paper (4) for use for transferring a print of ink onto a fabric, said transfer paper comprising: i) a base paper (2); ii) an additive (8) comprising a starch component, and a binding agent; wherein said starch component being a starch selected from the group comprising unmodified starch or a modified starch or a mixture thereof; and wherein said binding agent being a binding agent selected from the group comprising: an alkyl ketene dimer, a tall oil/fumaric acid copolymer, a styrene/acrylate copolymer and an alkenyl succinic anhydride and a mixture thereof; wherein said base paper (2) comprises an amount of said additive by being impregnated therewith; and wherein said base paper (2) having a water uptake as defined by a Cobb-45 value of 10-100 g/m² and a having a Gurley porosity of 10-140 seconds. The present invention furthermore relates to uses of the transfer paper (4).

Methods of sizing paper using a latex as a surface sizing agent are described, in which the latex is defined by acid number or particle size. Further described are methods of improving toner adhesion of papers that are surface sized with alkenylsuccinic anhydrides by employing latexes that have a glass transition temperature of from about 25 to about 65. Still further described are low shear methods of dispersing alkenylsuccinic anhydrides in sizing compositions using latexes as dispersing aids.