10results about "Starch adhesives" patented technology

The present application relates to the technical field of adhesive, in particular to a double crosslinking type starch-based wood adhesive and a preparation method thereof, aiming at solving the technical problems of poor water resistance, long curing time and complex process. In the present application, starch is pre-dispersed and nano-silica modified by octadecyl is added to form a physical crosslinking network of hydrophobic barrier through ultrasonic dispersion; then, alkali lignin, epoxy soybean oil, citric acid, bio-based furan ring-containing di-epoxy monomer and glycerol are sequentially added to form double chemical crosslinking through one-pot heating and stirring; then, copper-histidine organic metal complex is added as a catalyst, and a defoaming agent is added after cooling to obtain the starch-based wood adhesive. The present application significantly improves the water resistance and mechanical strength of the adhesive, and the preparation process is simple and environmentally friendly.

The application belongs to the technical field of new materials, and discloses a starch-based adhesive prepared by urea pre-activation and tannin acid post-crosslinking as well as a preparation method and application thereof. The starch-based adhesive comprises a base component and a modifier. The base component comprises waxy cassava starch, gelatin, citric acid, glycerol and water, and the modifier comprises urea and tannin acid. In the preparation process of the base adhesive, two modification processes of "urea pre-activation" and "tannin acid post-crosslinking" are innovatively introduced. Urea, as a hydrogen bond breaker / plasticizer, firstly inserts between the polymer chains of starch, gelatin and the like, breaks part of the original strong hydrogen bonds, increases the movement ability of the chain segments, and exposes more active sites such as hydroxyl groups and amino groups, thereby creating conditions for the subsequent crosslinking reaction of tannin acid. Then, tannin acid is added, and the rich o-benzene triol groups in the molecular structure of tannin acid are used to form multiple strong hydrogen bond interactions with the active sites exposed after activation, so that a more compact and stable double network structure is restructured.

This invention provides a method for preparing a high-mechanical-performance starch-based hydrogel and its application in wood bonding, belonging to the field of adhesive technology. The invention involves uniformly mixing starch and MCC, gelatinizing the mixture, and then soaking it in a calcium chloride solution to obtain the high-mechanical-performance starch-based hydrogel. This high-mechanical-performance starch-based hydrogel possesses excellent adhesive properties. After shearing, it is coated onto the surface of wood and hot-pressed to achieve wood bonding; its adhesive strength reaches up to 10.228 MPa, and it can maintain good adhesive strength even in extreme environments, showing broad application prospects. Furthermore, the preparation process of this invention is simple, efficient, and environmentally friendly, requiring no high-temperature, long-term heating, pH adjustment, or additional chemical crosslinking agents, thus meeting the needs of efficient industrial production of wood bonding.

The present invention relates to an adhesive for a paper laminate, and more particularly to an adhesive for a tissue paper laminate including at least one tissue ply that is adhered to itself (e.g., folded back on itself) or to another surface (e.g., another tissue ply or non-woven, woven fabric substrate, etc.), the adhesive being a highly dilutable adhesive based on an aqueous starch containing at least one modified starch and having a viscosity as defined herein. Also included are the use and method of use of such an adhesive, products, particularly the laminates obtained by these methods and uses.

The present application relates to a kind of moisture-proof high-strength corrugated paperboard and its preparation method, belong to packaging material technical field.The paperboard is by surface layer, first corrugated layer, intermediate flat layer, second corrugated layer and inner layer sequentially composite;First corrugated layer is A type corrugation, and the height of herringbone is 4.5-5.5 mm;Second corrugated layer is B type corrugation, and the height of herringbone is 2.5-3.2 mm;Surface layer and inner layer surface are coated with waste protein-based modified sizing agent layer.Preparation method includes: preparation waste protein-based modified sizing agent and biomass adhesive;Each layer base paper is compounded by biomass adhesive, and paperboard blank is obtained by drying under negative pressure;Again, surface sizing, drying are obtained.The present application is by "A herringbone, flat layer, B herringbone" I-shaped steel structure design, in combination with waste protein resource utilization of environmental protection sizing agent, and low-temperature negative pressure compounding process, so that paperboard has excellent moisture-proof performance and high-strength characteristics, simultaneously realizes clean production.

This invention relates to the field of adhesive technology, specifically disclosing a low-VOC, anti-settling, and foam-suppressing bio-based white latex and its preparation method. It is prepared from raw materials comprising the following parts by weight: 80-120 parts bio-based starch; 30-50 parts nano-sized inorganic filler; 10-20 parts vinyl acetate; 8-10 parts polyvinyl alcohol; 5-10 parts modified etherified cellulose; 3-8 parts hydrated acrylic amide solution; 2-5 parts sodium carbonate; 150-200 parts deionized water; 1-3 parts emulsifier; 0.5-1.5 parts inorganic initiator; and 2-4 parts bio-based plasticizer. This invention effectively solves the technical defects of existing white latexes, such as high dependence on petroleum-based materials, high VOC content, high cost, easy sedimentation and stratification, and incomplete degassing, through reasonable raw material ratios, optimized preparation processes, and vacuum degassing technology. It achieves a synergistic balance between environmental friendliness, economy, and stability in use. Test results fully demonstrate that this technical solution has significant beneficial effects and meets industry development trends and industrial production needs.

Fiber-containing composites are described that contain woven or non-woven fibers, and a cured binder formed from a binder composition that includes (1) a reducing sugar and (2) a crosslinking agent that includes a first carbon moiety selected from an aldehyde, a ketone, a nitrile, and a nitro group, wherein an α-carbon atom having at least one acidic hydrogen is directly bonded to the first carbon moiety. Exemplary reducing sugars include dextrose and exemplary crosslinking agents include glyoxal. Exemplary fiber-containing composites may include fiberglass insulation.

The application belongs to the field of low-carbon building bonding materials, and specifically comprises a two-component adhesive based on microbial mineralization and application thereof. The two-component adhesive comprises component A and component B; the component A comprises microbial freeze-dried powder and microbial nutrients; the component B comprises a mineralizer and gelatinized starch; wherein the mass ratio of the component A to the component B is 1:9-15. The two-component adhesive can replace cement in the role of building repair and masonry, has excellent interfacial bonding performance with sand-based and solid waste-based low-carbon building materials, has high bonding strength and low-carbon environmental protection characteristics, can provide efficient and stable technical support for the masonry construction and structure repair of low-carbon building materials, and is conducive to promoting the large-scale development of a green low-carbon building system.

This invention belongs to the field of adhesive technology, and discloses a multi-component synergistic adhesive based on waxy cassava starch / gelatin / citric acid, its preparation method, and its application. The adhesive includes a main component and water, wherein the mass fraction of the main component is 25%. The main component includes waxy cassava starch (WCS), gelatin, citric acid (CA), and glycerol, with a mass ratio of waxy cassava starch:gelatin:citric acid of 75-25:25-75:20-80. The adhesive of this invention has extremely high storage stability, showing no obvious stratification or precipitation after being placed at 25°C for one month, solving the industry problem of short shelf life of traditional biomass adhesives, and facilitating industrial production and long-distance transportation. The bonding performance of the adhesive of this invention to cardboard, wood, steel, and glass plates stems from the synergistic effect of physical-mechanical interlocking and intermolecular hydrogen bonding.

The present invention relates to starch compositions, methods of making starch compositions, methods of increasing the viscosity of a starch composition and uses of a starch composition. In particular, the present invention relates to a low-viscosity liquid starch composition that increases in viscosity upon the addition of water and associated methods and uses.