41results about "Pectin adhesives" patented technology

An environmentally friendly, formaldehyde-free, aqueous binder composition that includes a carbohydrate, a crosslinking agent, and a pre-reacted product of an alcohol or polyol and monomeric or polymeric polycarboxylic acid or polyglycerol is provided. The pre-reacted product may include glycerol and esters of citric acid such a monoglyceryl citrate, diglyceryl citrate, and triglyceryl citrate as well as other higher molecular weight citric acid-based esters. The inclusion of the pre-reacted product in the binder composition helps to speed the crosslinking reaction, induces faster water evaporation, decreases the viscosity of the binder, helps to reduce the amount of water needed for application of the binder, decreases tackiness, and helps to achieve a maximum vertical expansion of the insulation pack in the transfer zone. The binder composition may be used in the formation of insulation materials and non-woven chopped strand mats.

Fibrous insulation products have an aqueous binder composition that includes a carbohydrate and a crosslinking agent. In exemplary embodiments, the carbohydrate-based binder composition may also include a catalyst, a coupling agent, a process aid, a crosslinking density enhancer, an extender, a moisture resistant agent, a deducting oil, a colorant, a corrosion inhibitor, a surfactant, a pH adjuster, and combinations thereof. The carbohydrate may be natural in origin and derived from renewable resources. Additionally, the carbohydrate polymer may have a dextrose equivalent (DE) number from 2 to 20. In at least one exemplary embodiment, the carbohydrate is a water-soluble polysaccharide such as dextrin or maltodextrin and the crosslinking agent is citric acid. Advantageously, the carbohydrates have a low viscosity and cure at moderate temperatures. The environmentally friendly, formaldehyde-free binder may be used in the formation of insulation materials and non-woven chopped strand mats. A method of making fibrous insulation products is also provided.

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 5 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.

An environmentally friendly, bio-based binder system that is useful for the formation of fiberglass insulation, the system includes: A) an aqueous curable binder composition, which includes a carbohydrate and a crosslinking agent; and B) a dedust composition, which includes a blown, stripped plant-based oil and optionally at least one emulsifying agent. The bio-based binder system is typically heated to form a cured binder system.

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 present invention relates to a technique for preparing a wheat gluten protein adhesive, which belongs to the technical field of the production of plant protein adhesives. Citric acid solution is poured into the aqueous solution of wheat gluten protein to produce dispersed solution; then, water-soluble colloidal solution is poured into the dispersed solution to modify the protein in the dispersed solution, so that modified solution is produced; the modified solution is kept sill for one night, so that the wheat gluten protein adhesive is prepared. The technique has the advantages of simpleprocess flow, low requirement on production equipment, ample and easily obtained materials, low production cost, excellent product performance, etc. Particularly, the wheat gluten protein adhesive issuitably used as additive for food bonding, cardboard bonding and glass wool.

The present invention relates to the use of a bonding resin prepared by providing an aqueous solution comprising at least one biobased product selected from tannin, starch, soy protein, glycerol, chitin, pectin, dextrose or other carbohydrates, or a mixture thereof and mixing the aqueous solution with one or more of certain crosslinkers such as ethers, and optionally one or more additives. The bonding resin is used in the manufacture of laminates, mineral wool insulation or wood products, such as engineered wood products, such as plywood, oriented strandboard (OSB), laminated veneer lumber (LVL), medium density fiberboards (MDF), high density fiberboards (HDF) or particle boards. Preferably, the bonding resin does not comprise lignin.

A roll of absorbent sheet tail-sealed with an NFC containing aqueous tail-seal adhesive includes an NFC containing aqueous tail-seal adhesive interposed between a tail of the roll of absorbent sheet and an underlying convolution of the roll adhering the tail to the underlying convolution to form the tail-seal. The NFC containing tail-seal adhesive comprises nanofibrillated cellulose and one or more additional components selected from the group consisting of components (i), (ii), (iii), (iv) and (v) wherein (i) is a water-soluble cellulose derivative; (ii) is a water soluble polyol; (iii) is a viscosity modifier other than a water soluble cellulose derivative; (iv) is PVOH; and (v) is PVOH and a viscosity modifier. The NFC containing tail-seal adhesive optionally includes a surface tension modifier other than PVOH.

The invention relates to the field of adhesives, in particular to a full-bio-based adhesive and a preparation method and application thereof. The method comprises the following steps: preparation of demethylated nano-lignin: carrying out nanocrystallization treatment on the demethylated nano-lignin; preparation of oxidized nanocellulose; and preparation of the full-bio-based adhesive: carrying outa pre-crosslinking polymerization reaction on the demethylated nano-lignin suspension, the oxidized nanocellulose suspension and pectin to obtain the full-bio-based adhesive. According to the full-bio-based adhesive and the preparation method thereof provided by the invention, lignin is subjected to demethylation and nanocrystallization treatment, and cellulose is also subjected to nanocrystallization and oxidation treatment. In this way, the reaction efficiency of covalent bonds generated between lignin and cellulose is remarkably improved, the crosslinking degree is improved, the adhesion to a plate is good, and the bonding strength is high. By full-bio-based preparation, the release amount of harmful gases of the obtained adhesive is low, and the reutilization value of the whole plywood is improved through the main components of lignin and cellulose plywood sheets.

The invention discloses a preparation method of corn starch adhesive through cannabis degummed waste liquor, which comprises the following steps: a, the preparation of carrier starch, b, the preparation of main starch, and c, the preparation of the corn starch adhesive. Corn starch is dissolved in warm water at 40 plus or minus 2 DEG C, and then catalyst FeSO4 is added. Cannabis degummed waste liquor is added till the pH value is 11.0 to 11.2, H2O2 is slowly added, and reaction is performed for 120min. Residual degummed waste liquor is added and stirred. Borax is dissolved in warm water at 40 plus or minus 2 DEG C, and then corn starch is added and uniformly mixed, and a small amount of tributyl phosphate is added, so as to perform defoaming. The carrier starch is added into the main starch while being stirred, stirring is performed for 30min, heat preservation is for 30min at 40 plus or minus 2 DEG C, and then a finished product is obtained after cooling. For producing 1 ton of adhesive, 166 Kg of corn starch, 260 Kg of degummed waste liquor, 0.22 Kg of FeSO4, 8.88 Kg of 30 percent H2O2, 2.33 Kg of borax, and 0.11 Kg of tributyl phosphate are required. The method is simple in processes and easy for industrialization, reduces the pollution of the cannabis degummed waste liquor, reduces the environmental management cost, simultaneously reduces the preparation cost of the corn starch adhesive, and increases the economic efficiency of enterprises and social benefit.