51results about "Amylose/amylopective derivative adhesives" patented technology

Non-thermoplastic starch fibers having no melting point and having apparent peak wet tensile stress greater than about 0.2 MegaPascals (MPa). The fibers can be manufactured from a composition comprising a modified starch and a cross-linking agent. The composition can have a shear viscosity from about 1 Pascal.Seconds to about 80 Pascal.Seconds and an apparent extensional viscosity in the range of from about 150 Pascal.Seconds to about 13,000 Pascal.Seconds. The composition can comprise from about 50% to about 75% by weight of a modified starch; from about 0.1% to about 10% by weight of an aldehyde cross-linking agent; and from about 25% to about 50% by weight of water. Prior to cross-linking, the modified starch can have a weight average molecular weight greater than about 100,000 g/mol.

The invention discloses an environmental-friendly amylopectin composite adhesive for paper products and a production method thereof. The composite adhesive is prepared by oxidizing, cross-linking, etherifying and pasting starch to generate a modified starch adhesive, modifying polyvinyl alcohol to be used as a reinforcing agent, adding a preserving agent and a drier, and compounding. The environmental-friendly amylopectin composite adhesive for the paper product has strong initial adhesion and adhesive force, high-speed drying, fast natural air-drying without the phenomenon of wire drawing, corrugation deviation, corrugation-collapse, and the like, favorable cardboard hardness and stiffness, and has no efforescence, and does not absorb moisture. The invention is applied to the glue for producing three domestic corrugated boards and applied to the glue for various paper barrels, paper tubes, cement bag papers, furniture and interior decorations.

The invention provides a three layered reprographic paper having improved strength, stiffness and curl resistance properties, and a method for making same. The paper has a central core layer made largely of cellulose and bulked with a bulking agent such as a diamide salt. A starch-based metered size press coating is pressed on both sides of the core layer, wherein the starch has a high solid content. The coating forms a three layered paper having an I-beam arrangement with high strength outer layers surrounding a low density core.

A chemically modified plasticized starch (CMPS) is prepared by reacting starch with an organic dibasic acid or an anhydride of the acid in the presence of a plasticizer using optional free radical initiators, and optionally with the incorporation of nano clays in the reactive extrusion process. The starch is thermoplastic and has a lower viscosity than the traditional thermoplastic starch. The CMPS is useful in preparing starch polymer compositions which are at least partially biodegradable.

The invention belongs to the field of auxiliary binders in the wallpaper industry and particularly relates to an esterified-starch-modified waxy corn wet glue. The esterified-starch-modified waxy corn wet glue is mainly prepared from the following raw materials in parts by weight through gelatinization, cross-linking and complexation: 76-77 parts of de-ionized water, 5-7 parts of esterified starch A, 3-5 parts of esterified starch B, 4-6 parts of oxidized starch, 4-6 parts of modified waxy corn starch, 0.5-0.8 part of acrylamide, 0.1-0.15 part of nonferrous aluminum sulfate, 0.4 part of sodium benzoate, 0.1-0.15 part of a defoaming agent, 2 parts of urea, 1-1.2 parts of ethylene glycol, 0.2-0.4 part of a bactericide and 2-4 parts of white latex. The invention also provides a preparation method of the modified waxy corn wet glue. The esterified-starch-modified waxy corn wet glue, disclosed by the invention, is extracted and purified from natural waxy corns, belongs to circular plant products and is a renewable resource, so that the policy of saving energy in China is performed better; and meanwhile, the esterified-starch-modified waxy corn wet glue has the advantages of strong bonding power and capabilities of being mixed with water for 100%, improving the bonding area of wallpaper and reducing decoration cost for a user.

Disclosed is a foaming material composite including a water-soluble polysaccharide having ester linkage or amide linkage, a foaming agent, and a plasticizing agent.

The invention relates to a process for preparing a hydrophobic starch, comprising etherification, esterification or amidation of a root or tuber starch comprising at least 95 wt. % of amylopectin, based on dry substance of the starch, or a derivative thereof, with a substituent comprising an alkyl chain having from 4–24 carbon atoms. The invention further relates to a hydrophobic starch obtainable by said process.

The present invention provides a biodegradable article formed from enzyme-synthesized amylose using phosphorylase, wherein the enzyme-synthesized amylose is composed of glucose monomers exclusively bonded by alpha-1,4-glucosidic likage and has a weight average molecular weight of not less than 100 kDa, preferable not less than 600 kDa. The enzyme-synthesized amylose employed in the present invention has a molecular weight distribution (Mw/Mn) of not more than 1.25 and can be chemically modified if desired. The biodegradable article of the present invention can be produced by (a) the enzyme-synthesized amylose and/or its modified one, or a combination of the amylose (a) and another polymer material (b).

An aqueous adhesive composition and a process for preparing such compositions are disclosed. The composition comprises macromolecular complex comprising (A) a first component comprising (i) a framework element and (ii) a polyphenol, and (B) second component comprising a polypeptide, oligopeptide, amino acid, or polyamine. The framework element comprises (a) a polypeptide, oligopeptide, amino acid, or polyamine, (b) a polysaccharide, oligosaccharide, or monosaccharide, or a saccharide conjugate, or (c) a lignin, a lignan or a lignin conjugate. The polyphenol comprises a tannin, a tannic acid, a flavonoid, or a poly-resorcinol. An adhesive precursor composition comprising the first component is also disclosed.

The invention discloses a positive ion branched chain starch wood adhesive and the method to manufacture. It adopts low oxidation to increase the starch aldehyde group after reaction to solve the strong cementing force of the adhesive. It adds cross linking agent etherifying agent, and oxidizing agent to branched chain to make the invention has strong cementing force, good water resistance, fluidity, and stability.

A sand sculpting composition including approximately 100 parts by dry weight of sand, between 0.1 part and 5 parts by dry weight of at least one non-toxic cold water-soluble adhesive agent selected from the group consisting of pre-gelatinized starches, chemically modified starches and chemically modified celluloses, and between 6 and 25 parts by weight water. The adhesive agent has been combined with the sand and an amount of water sufficient to both dissolve the adhesive agent and allow the adhesive agent to coat the particles of sand. A coloring agent may be added to the adhesive agent.

Novel starch-based glue paste compositions are disclosed composed of (i) a carrier paste containing 5 to 16 wt % of a starch selected from the group consisting of corn starch, wheat starch, rye starch, oat starch, barley starch, potato starch, tapioca starch and pea starch, each being native starch or chemically modified starch, or any mixture thereof and (ii) a main paste with a total starch content of 25 to 50 wt % composed of a mixture of 10 to 30 wt % native rice starch or an acetylated version thereof having an amylose content of 12 to 20 wt %, 1 wt % other compounds and a complementary amylopectin content of 87 to 79 wt %, and 90 to 70 wt % of a starch or mixture of starches selected from the above defined group. Processes for the manufacture of the novel glue paste compositions based on the Stein-Hall method are disclosed, as well as a premix of starches for said manufacture. The glue paste compositions present excellent film forming and glueing properties and are particularly suitable for the manufacture of laminated corrugated board.

A novel adhesive that finds use in a cold corrugating system has a 5 second tack at a temperature of 160° F. of at least 50±2 grams.

The present invention relates to dry process of producing low viscosity phosphate ester starch, and features that starch, NaHPO4.12H2O, NaHPO2.2H2O, urea, hydrochloric acid, caustic soda and other material are produced into low viscosity phosphate ester starch through the technological process including pre-drying, temperature raising and lowering, regulating pH value and other steps. The low viscosity phosphate ester starch has the features of low viscosity, high stability, good filming performance, high water maintaining property, etc. and may be widely used in starch processing.

A pressure sensitive adhesive composition suitable for medical purposes comprising a rubbery elastomeric base and two or more water soluble or water swellable hydrocolloids, said adhesive composition comprising a substantially homogeneous mixture of 15-60 % of one or more rubbery components, 10-60 % of a mixture of hydrocolloids comprising one or more hydrocolloids selected from the group of amidated pectins and potato starch, 0-50 % of one or more tackifier resins, 0-15 % cohesive strengthening agent, 0-10 % of a plasticizer and 0-5 % pigment, shows at least as good properties with respect to resistance to biological fluids as well as adhesion to the skin and coherence as state of the art adhesives comprising gelatine.

The invention discloses an adhesive for combining aluminum-foil papers and a preparation method thereof, and belongs to the technical field of adhesives. The adhesive consists of the following components: 100-140 parts by weight of oxidized starch, 4-6 parts by weight of borax, 20-30 parts by weight of sodium hydroxide, 4-8 parts by weight of hydrogen peroxide, 0.8-1.2 parts by weight of tributyl phosphate, and 90-110 parts by weight of water. Due to the fact that the adhesive employs the oxidized starch as the main raw material, the cost on raw materials of the adhesive is reduced, and the adhesive is environment-friendly and non-toxic; due to the fact that the hydrogen peroxide, the borax, the sodium hydroxide and the tributyl phosphate are mixed with certain amount of water under the normal temperature according to specific procedures, not only the technology is simple, but also the prepared adhesive can be stored for 12 months without influencing the character of service; therefore, the adhesive is good in stability; moreover, the adhesive contains 13-20% of solid, therefore, the adhesive is good in fluidity and is able to meet the requirements of different combining speeds.

The invention relates to a modified starch-based adhesive for a high-speed cigarette making machine. The modified starch-based adhesive comprises, by weight, 10%-80% of urea modification waxiness corn starch and/or a derivative of the urea modification waxiness corn starch, 10%-80% of degraded waxiness corn starch and/or a derivative of the degraded waxiness corn starch, 2%-20% of modified tamarindus powder and a corrosion remover.

A starch with a high content in amylose, obtained through a process comprising acetylation and pre-gellation, can provide useful coatings in food, drug, cosmetic and dietetic fields, both for humans and animals, and also in agriculture.