384results about How to "High degree of substitution" patented technology

A stretched cellulose acylate laminate film having a skin layer containing a cellulose acylate with a total degree of acyl substitution of more than 2.7 and a core layer containing a cellulose acylate with a total degree of acyl substitution of 2.0-2.7 wherein the core layer is thicker than the skin B layer and at least one of these layers contains a retardation-controlling agent, is excellent in high expressibility, little optical unevenness and good releasability from a support.

A sulfoalkyl ether-alkyl ether cyclodextrin (SAE-AE-CD) derivative is provided. The SAE-AE-CD possesses advantages over known SAE-CD and AE-CD derivatives as well as over the parent cyclodextrin by being more water soluble and less membrane disturbing. The SAE-AE-CD includes at least one sulfoalkyl ether group and at least one alkyl ether group even though the degree of substitution for the functional groups can be different. The SAE functional group can be present in molar excess over the AE functional group and vice versa. The total degree of substitution of the cyclodextrin, with respect to both functional groups, can be varied such that a minority or a majority of the hydroxyl moieties of the CD are derivatized. The SAE-AE-CD derivative can be used to solubilize compounds with insufficient water solubility. In some cases, they also stabilize compounds in solution against degradation or to solubilize degradation products formed during degradation. In addition, SAE-AE-CD can also be used for other purposes such as osmotic agents, agents used to mask the taste of problematic drugs. Surprisingly, while AE-CDs are known to be toxic by being membrane disturbing, SAE-AE-CDs are less membrane disturbing and therefore have greater safety.

Disclosed is a magnetic crystal for electromagnetic wave absorbing materials, having a structure of ε-M_xFe_2-xO₃ with 0<x<1, which has the same space group as that of an ε-Fe₂O₃ crystal and which is derived from an ε-Fe₂O₃ crystal by substituting a part of the Fe site therein with M. In this, M is a trivalent element having an effect of lowering the coercive force Hc of ε-Fe₂O₃ crystal by the substitution. Concretely, the element M includes Al and Ga. An electromagnetic wave absorber having a packed structure of particles having such a substituent element M-added “M-substituted ε-Fe₂O₃ crystal” as the magnetic phase may control the electromagnetic wave absorption peak frequency depending on the degree of substitution with the element M, and for example, the invention gives an electromagnetic wave absorber applicable to a 76 GHz band for on-vehicle radars.

The invention discloses a method for preparing carboxymethyl chitosan. The method comprises the following steps of by using chitin as a material, alkalifying the chitin, carrying out deacetylation reaction by using a cooling-heating alternative method to produce chitosan sodium salt; and then, carrying out carboxylation under an alkaline condition to obtain a carboxymethyl chitosan product. The method disclosed by the invention is simple in process and easy to control, so that a chain scission phenomenon appearing due to long-term high temperature reaction during deacetylation reaction of a chitosan molecular chain is avoided, thereby obtaining carboxymethyl chitosan which is high in viscosity, high in degree of substitution and better in water solubility; moreover, the method is suitable for large-scale industrial production.

The invention discloses a producing process of quaternary ammonium type cation modifying starch, comprising the following steps of: mixing, modifying, neutralizing, physically synergizing, screening, weighing and packing. The invention ensures that the common starch has cation characteristics and higher substitution values, reduces pasting temperature and precipitability of starch, has the advantages of reasonable producing process, high heating efficiency, thorough modification, good film forming property, high binding rate, high retention, low cost, small investment, low energy consumption, low pollution, simple producing process, high production efficiency, stable and reliable quality and wide application range and is suitable for large-scale production.

This invention relates to a synthesis method of quaternary ammonium cationic starch, which takes starch, quaternary ammonium, and sodium hydroxide as raw materials in water medium, and conducts eight steps of conditioning, alkalization, etherification, neutralization, washing, drying, screening, and packaging. The product is white powder, and gels to be the thick translucent gel heated to 50~66deg.C in water with DS values of 0.01 to 0.05. This invention is reasonable, makes the general starch has cationic performance and higher substitution, lowers the gelatinization temperature and freezing, so its effect can completely achieve the requirement of paper industry.

A cellulose ester and film thereof useful for remarkably improving optical properties such as optical isotropy are provided. The cellulose ester is adjusted so that the degree of substitution is from 2.90 to 2.965, the total of degrees of substitution at 2- and 3-positions is not less than 1.97, and the half height width of chemical composition expressed in degree of substitution is not more than 0.09. Such a cellulose ester maybe produced by a method for producing a cellulose ester, which comprises (i) an acylating step for acylating a cellulose with an acylating agent in the presence of a sulfuric acid catalyst, and (ii) a hydrolyzing step for hydrolyzing the acylated product in the presence of a sulfuric acid catalyst, and in which the acylation carried out with from 1.40 to 2.0 molar equivalents of the acylating agent relative to 1 mol of a hydroxyl group in the cellulose in the presence of 6.5 to 9.5 parts by weight of the sulfuric acid catalyst relative to 100 parts by weight of the cellulose in the acylating step (i).

The invention discloses a continuous production method of carboxymethylcellulose lithium for lithium batteries in order to solve the problems that a lithium ion battery adhesion agent pollutes the environment, is single in function and high in price. The production method includes the steps that sodium carboxymethyl cellulose is prepared, and the carboxymethylcellulose lithium is obtained after the sodium carboxymethyl cellulose is acidized, alkalinized and purified. The prepared carboxymethylcellulose lithium breaks the pattern that autonomous mass production of carboxymethylcellulose lithium cannot be achieved domestically, according to the current condition of domestic production, on the basis that the performance of the carboxymethylcellulose lithium is guaranteed, continuous and large-batch production of the carboxymethylcellulose lithium can be achieved, and production cost is greatly reduced. A series of product performance testing preparation parameters are summarized in the method, and the parameters are quality control indexes of carboxymethylcellulose lithium and can also provide a reference for establishing standards of industrialized carboxymethylcellulose lithium in future.

This invention relates to a modified starch preparation method, specifically a phosphate starch, which takes starch, urea, inorganic phosphate as raw materials in the double-cones rotary dryer, and conducts seven process steps of preparing chemicals, mixing, pre-drying, esterification, cooling, sieving, packaging to prepare the finished product, which is light yellow to yellow powder particle, and the viscosity peak is from 1000 to 6000BU. When the mass concentration is 6% for starch paste, it can gelatinize at the temperature lower than 66deg.C till cold water.

The invention discloses a diversification premixing modified starch and a relative production method, which premixes etherified-crosslink-esterified starch, esterified-esterified starch and esterified-crosslink starch which are produced independently in a certain ratio, to obtain the starch with good freeze stability, gel property, and water retention. The product supplies a new processing property for modified starch product, which can be applied for food, particularly for low-temperature meat product, to adhere, stuff and improve water retention. The invention has short production period, low energy consumption, simple operation and high product stability.

The invention provides a method for preparing a cross-linked solid-solid phase change energy storage material, which relates to a method for, after homogeneous preparing laurel acid cellulose ester with high substitution by using a cellulose/LiCl/DMAc solution system, synthesizing a cross-linked polyethylene glycol/laurel acid cellulose ester phase change energy storage material by using laurel acid cellulose ester and polyethylene glycol as main materials through solution grafted polymerization in the presence of cross-linking agent. Although both polyethylene glycol and laurel acid cellulose ester are solid-liquid phase change materials, polyethylene glycol and laurel acid cellulose ester are mutually dissolved and cross-linked in the process of grafted cross-linked polymerization to have typical polyether type segmented cross-linking network structures, thereby containing and restricting their respective microflow mutually. The phase change enthalpies of two components are overlapped mutually, thus final product has higher phase change enthalpy up to 194.7J/g. The obtained material has proper phase change temperature at 19 to 60 DEG C, stable heat performance, no liquid produced in phase change process and completely invertible phase change process, is a polymer solid-solid phase change energy storage material with bigger use valve and development prospect.

The invention discloses a method for extracting sweet buckwheat dietary fibers, which comprises an enzyme method and an alkaline method for extracting the dietary fibers in kernels and shells of the sweet buckwheat and makes the visual color of the obtained dietary fibers more acceptable by people and improves the application value of the dietary fibers by the decoloring and modification treatments. Currently, most processing residues of the buckwheat are generally abandoned or put away cheaply so as to cause the waste of a large amount of buckwheat resource. The invention adopts different methods to extract and carry out decoloring treatment to prepare the sweet buckwheat dietary fibers with higher activity and few hazardous substance residuals, applies the prepared buckwheat dietary fibers to the food industry, and applies the prepared buckwheat dietary fibers into other fields by modification. The invention can solve the technical problems of extraction, decoloring, modification and the like of the sweet buckwheat dietary fibers, can improve the competitive advantage of the economy of the buckwheat production place, realizes the industrialization development and utilization of the sweet buckwheat dietary fibers, and promotes the economy development of the buckwheat production place.

The invention provides a preparation method of carboxymethyl pachyman and a novel application of the carboxymethyl pachyman. According to the method, in the process of carrying out carboxymethylation modification on pachymaran, components and ratios of a reaction medium are changed, the reaction temperature is regulated and a catalyst process is adopted, so that the carboxymethylation efficiency of the pachymaran is remarkably improved, the utilization rate of the raw and auxiliary materials is increased, and the cost is saved. Meanwhile, by virtue of the novel application of the carboxymethyl pachyman prepared by the method to preparation of immunopotentiators of livestock and poultry, the immunity to pathogenic microorganisms of the livestock and the poultry can be remarkably enhanced, and the immune efficacy of vaccines can be improved; by virtue of the novel application of the arboxymethyl pachyman prepared by the method to feed additives, the meat performance of the livestock and the poultry can be effectively improved.

The invention relates to fields of daily chemicals and pharmaceuticals industry, in particular to 6-amino-6-deoxyinulin as well as preparation and application thereof. In the 6-amino-6-deoxyinulin shown as a formula (I), the average value range of n is 10-35. The preparation comprises the steps of undergoing a helogenation reaction of inulin or undergoing esterification of inulin and sulfonyl chloride, respectively undergoing a reaction of the product obtained through the helogenation reaction of the inulin or the esterification and sodium azide or azido lithium at a temperature of 40-70 DEG C for 8-24 hours to obtain 6-azido-6-deoxyinulin, and reducing the 6-azido-6-deoxyinulin by utilizing triphenylphosphine or lithium aluminium hydride to obtain the 6-amino-6-deoxyinulin. In the invention, the 6-amino-6-deoxyinulin is obtained through an effective synthetic means; an inulin six-position easily-leaving group is obtained through utilizing halogen to substitute the primary hydroxyl ofthe inulin or through the esterification of inulin and sulfonyl chloride; and the 6-amino-6-deoxyinulin with high substitution is obtained through azido nucleophilic substitution and reduction. The 6-amino-6-deoxyinulin synthesized by the preparation method provided by the invention is simple in the synthetic step and easy to popularize; and the required equipment and raw materials are easy to get. The formula (I) is shown in the specification.

The invention discloses a method for preparing bagasse pith parenchymal cell meshed quaternary ammonium salt cationic cellulose. The method comprises the following steps: airing the bagasse subjected to sugar milling, screening to obtain a bagasse pith raw material which takes parenchymal cell tissue as a principle component, performing sodium hydroxide/hydrogen peroxide/oxygen/anthraquinone delignification treatment on the raw material, soaking the delignification slurry in an aqueous solution of potassium hydroxide, and removing hemicellulose components to obtain cellulose; and carrying out an etherification reaction on alkali cellulose by adopting a microwave heating mode, synthesizing linear cationic cellulose ether, and carrying out a cross-linking reaction on the cleaned and dried cellulose ether by adopting an aqueous solution free radical initiation method to obtain the meshed quaternary ammonium salt cationic cellulose with high degree of substitution. The meshed quaternary ammonium salt cationic cellulose has high degree of substitution, the quaternary ammonium salt substitution degree is in a range of 0.29 to 0.61, and the meshed quaternary ammonium salt cationic cellulose can rapidly absorb water and swell until being dissolved when meeting water. The method has high application prospects in multiple aspects in textile dyeing and finishing, papermaking, mining, oil exploitation, daily-use chemical industry, water treatment of ethyl biological medicine and the like.

The invention relates to a sulfation raw lacquer polysaccharide with biological activity prepared through the steps of, (2) dissolving or suspending the raw lacquer polysaccharide in 50-100 times weight ratio of drying solvent, stiring 10-30 min at 40-100 deg. C, charging trioxide pyridine compound of 1-4 times molar weight of raw lacquer polysaccharide residue or 1:2-4:1 volumetric ratio of sulfuric chlorohydrin pyridine mixture, reacting 0.5-4 hrs, cooling down the reaction mixture through ice bath, charging ice water with 1/3-1/2 times of solvent volume, neutralizing with 5-20wt% of NaOH, dialyzing in distilled water, subjecting the dialysate to vacuum distillation concentration at 30-70 deg. C, settling with anhydrous alcohol, and vacuum drying with P2O5.

The invention relates to paste used in reactive dye printing of textiles, in particular to a method for preparing reactive printing paste taking starch as a raw material. The process adopts the following steps of impregnating, alkalizing, etherifying, static etherifying and aftertreatment, wherein the static etherification reaction is performed during starch carboxymethylation reaction, so that the production energy consumption is effectively reduced, the time of contact between an etherifying agent and the starch is prolonged, the reaction efficiency is improved, and the prepared reactive printing paste has high degree of substitution and a good printing and dyeing effect; a penetrating agent is added during reaction, so that the damage of an alkalizer to a crystallization zone of starch granules is accelerated, chloroacetic acid is promoted to enter the crystallization zone of the starch during static etherification reaction, the reaction uniformity of the starch granules is improved, and a phenomenon that most of substituent groups are distributed on the surfaces of the starch granules to cause instability of the product performances is avoided.

A basecoat composition is provided comprising: a) at least one film-forming polymer selected from the group consisting of acrylic polyols and polyester polyols; b) at least one rheological modifier; c) at least one solvent; d) at least one pigment; e) optionally, at least one microgel; f) optionally, at least one crosslinking agent; and g) at least one cellulose mixed ester. A wet-on-wet-on wet process is also provided. The process for coating a substrate comprises: a) applying a primer to said substrate to produce a primed substrate; b) applying a basecoat composition to said primed substrate while said primer is wet to produce a basecoated substrate; and c) applying a clearcoat composition to said basecoated substrate while said basecoat composition is wet and optionally said primer is wet to produce a coated substrate. Coated articles are also provided.

A rinse-off hair treatment composition for improved delivery of amino-acid to the hair and/or scalp comprising:(a) a particulate metal-amino acid complex;(b) at least one surfactant; and(c) a deposition aid.