8results about "Starch dervative coatings" patented technology

The present application relates to the technical field of starch coating, in particular to a preparation method of structured starch coating liquid with oil-proof and moisture-absorbing dual functions. The method comprises the following steps: firstly, performing mild acidolysis or selective oxidation pretreatment on cassava starch; then, preparing starch milk by using the pretreated starch, and performing synergistic enzymolysis on the starch milk under mild conditions by using a composite enzyme composed of alpha-amylase and glucoamylase in a specific ratio; after the enzymolysis, performing enzyme inactivation treatment, and then adding a bio-based crosslinking agent for compounding. The prepared coating has a specific bimodal distribution structure of starch derivative molecular weight, which is a key to realize function balance. After the coating liquid is coated on a substrate such as paper and dried and solidified, the formed coating not only has excellent oil-proof performance, but also exhibits good water vapor absorption capacity. The raw materials of the present application are green and the process is environmentally friendly, and the prepared multifunctional coating can be effectively applied to the fields of food packaging, medical protection and other fields which need to resist oil and regulate humidity at the same time.

This invention provides a two-component flame retardant, its preparation method, and its application, relating to the technical field of flame retardants. The two-component flame retardant comprises component A and component B; wherein component A comprises starch phosphate ester, calcium chloride, surfactant, propylene glycol, aerogel, and water; wherein component B comprises bone glue and water. This two-component flame retardant is environmentally friendly, non-corrosive, and has no impact on plant growth. It can be used on trees, leaves, paper, walls, and insulation boards, exhibiting excellent performance. It demonstrates good weather resistance when used in rainy seasons in the south, cold regions in the north, and hot summers, without affecting product quality while providing excellent protection.

A coating material includes silane salt-modified polysaccharide salt, cationic starch, and water. The silane salt can be Si(OH)x(OK)y(R)4-x-y; R is a C1-10 alkyl group; x=1 to 2, y=1 to 2, and x+y=2 to 3. The polysaccharide salt is a salt of cellulose derivative, natural gum, alginic acid, starch, chitosan, or a combination thereof. The coating material can be used to manufacture an oil-proof paper.

Aqueous coating compositions for providing a grease resistant coating on fiber-based substrates are provided that comprise an n-OSA modified starch having an Mw of from about 500,000 to about 1,300,000 and a degree of substitution of from 0.002 to about 0.009, the n-OSA modified starch being present as from about 5 wt% to about 40 wt% of the total aqueous coating composition. The aqueous coating composition has a Brookfield viscosity at 30°C at 100rpm of from about 50 to about 2500 mPas; and the n-OSA modified starch is at least about 92% of any starch present in the aqueous coating composition. Methods of preparing the coating composition, fiber-based products comprising a coating of the coating composition, and methods of preparing these coated fiber-based product are also described.

The present invention relates to a packaging material comprising a paper substrate and a coating, the paper substrate having a Bendtsen permeability of less than 20.0 ml / min and the coating comprising C6-C18 alkenyl succinic anhydride modified starch, platy pigment having an average aspect ratio of 100-3000 and optionally plasticizer. The invention further relates to the use of the packaging material for food packaging and to a method of manufacturing the packaging material.

The application discloses a high-adhesion-resistance regenerated cellulose film and a preparation method thereof, and belongs to the technical field of regenerated cellulose film production, and comprises the following steps: viscose preparation, film regeneration, washing, desulfurization, bleaching, and obtaining a wet film after washing; the wet film is subjected to softening and anti-adhesion coating treatment; and the regenerated cellulose film is prepared through drying and humidity adjustment; the anti-adhesion agent used in the anti-adhesion coating treatment comprises a composition of one or more of modified starch suspension, cellulose micro-powder suspension and wax emulsion; the modified starch suspension is selected from any one of oxidized starch, hydroxypropyl starch, hydroxypropyl oxidized starch, acetylated starch and cationic starch; and the wax emulsion is selected from any one of palm wax emulsion, paraffin wax emulsion, PE wax emulsion, PP wax emulsion, Fischer-Tropsch wax emulsion and composite wax emulsion. In the application, the anti-adhesion agent is combined with the surface of the wet film, the adhesion effect is improved, and the generation of powder dropping is effectively avoided.

Aspects of the present disclosure include a biobased coating composition comprising at least one modified starch, at least one crosslinker, at least one plasticizer and at least one pH adjuster, wherein the at least one crosslinker is a citric acid crosslinker present in an amount ranging from 1 to 10 percent by weight of the biobased coating composition. Further aspects of the present disclosure include paper plate comprising a biobased coating composition comprising at least one modified starch, at least one crosslinker, at least one plasticizer and at least one pH adjuster, wherein the at least one crosslinker is a citric acid crosslinker present in an amount ranging from 1 to 10 percent by dry weight of the biobased coating composition. Additional aspects of the present disclosure include a biobased coating composition comprising at least one modified starch, at least one petroleum-based polymer, at least one crosslinker, at least one plasticizer and at least one pH adjuster, wherein the at least one petroleum-based polymer is present in an amount ranging from 1 to 50 percent by weight of the biobased coating composition.

A packaging film containing a protein, a plasticizer, and a reducing agent is provided. Also provided is a coating layer for use with the packaging film, the coating layer containing wax particles, ethylcellulose, and an emulsifier. The film is prepared by a method comprising the steps of: mixing the protein with water to form a first mixture; obtaining the supernatant from the first mixture; adding the plasticizer and reducing agent to the supernatant to form a second mixture; and drying the second mixture to form the film. The coated film is prepared by a method comprising the steps of: melting the wax to form molten wax; adding the emulsifier and solvent to the molten wax to form a third mixture; homogenizing the third mixture to form an emulsion; adding ethylcellulose to the emulsion to form a coating solution; and applying the coating solution to a film to form the coated film.