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Adhesive

一种黏着剂、连接分子的技术，应用在胶粘剂、木素粘合剂、多糖粘合剂等方向

Inactive Publication Date: 2016-11-09
NEW ZEALAND FOREST RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both resins have disadvantages

Method used

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Examples

Experimental program
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Effect test

example 1

[0533] Example 1. Zein:Tannin:Soy MDF

[0534] Corn gluten meal (Avon Gold, about 70% zein) (100 g) was added to water (450 ml) followed by adjustment to pH 11 with 40% sodium hydroxide solution. The reaction mixture was heated to 90 °C for 50 minutes, ensuring that it maintained a pH of 11. After one hour, mimosa tannins (10 g) were added and the solution was stirred for 10 minutes while adjusting the pH to 9 with formic acid solution and reducing the temperature to 70°C. Additional tannin feed (10 grams) was added with continued stirring. Glycerin (130 mL) was added followed by soy flour 7B (100 g). Stirring was continued for 50 minutes, and then the solution was cooled to ambient temperature. During cooling, boric acid (0.55 g) was added. The final solution is then added in the form of a fine mist to the mechanically mixed wood fibers at a rate of 8 to 10% binder content in the fibers. Fibers were formed into mattresses and consolidated by hot pressing at 180°C to obta...

example 2

[0535] Example 2. Zein: Tannin: Medium Density Fiberboard of Soy

[0536] Avon Gold (80 g) was added to water (360 ml) followed by adjustment to pH 11 with 40% sodium hydroxide solution. The reaction mixture was heated to 90 °C for 50 minutes, ensuring that it maintained a pH of 11. After one hour, sulfited pine bark tannins (8 g) were added and the solution was stirred for 10 minutes while adjusting the pH to 9 with formic acid solution and reducing the temperature to 70°C. Additional tannin feed (8 grams) was added and stirring continued. Glycerin (130 mL) was added followed by soy flour 7B (about 50 to 52% soy protein) (80 g). Stirring was continued for 50 minutes, and then the solution was cooled to ambient temperature. During cooling, boric acid (0.48 g) was added. The final solution is then applied by mechanical mixing with the wood fibers at a binder content of 8 to 10% in the fibers. The fibers were formed into a mat and consolidated by hot pressing at 210° C. to ...

example 3

[0537] Example 3. Lignin:Tannin:Soybean MDF

[0538] Lignosulfonate (30 g) was added to water (310 ml) at 70° C. and adjusted to pH 11 with 40% sodium hydroxide solution. Lysine sulfate (30 g) was added and after its dissolution the pH was adjusted to 9 with formic acid solution. Pine bark tannin (10 grams) was added and stirring continued. After addition of glycerol (120 mL) followed by soy flour 7B (100 g) and stirring continued for 60 minutes, boric acid (0.50 g) was added and the solution was cooled. The brown solution is applied to wood fibers with a binder content of 8 to 10% in the fibers and mixed mechanically. The fiber was hot pressed at 180°C to obtain an 8 mm medium density fiberboard having an internal bond strength of 0.57 MPa and a 24-hour cold water penetration thickness expansion rate of 21%.

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Abstract

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.

Description

technical field [0001] The present invention relates to an adhesive particularly suitable for use in the manufacture of lignocellulosic composites such as plywood, medium density fibreboard, particleboard and veneer and for joining wood and packaging, and Regarding a method for manufacturing such a composite material. Background technique [0002] MDF, particleboard, and other panel boards, plywood and veneer, and similar engineered wood products are generally composed of small-scale lignocellulosic or cellulosic materials (whether in pellets or sheets) and The adhesive or resin combination, the composition is then pressed or formed into a sheet or the like, and the adhesive is heated to cure the adhesive to fix the shape and provide an internal bond. [0003] In industry, the most commonly used adhesives are urea-formaldehyde (UF) resin and phenol-formaldehyde resin. Isocyanate resins are also used. Phenolic resins provide composites with excellent material properties, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J103/00C09J105/00C09J197/00C09J199/00C09J101/00
CPCC09J105/00C09J101/02C09J101/08C09J101/286C09J103/02C09J103/04C09J103/12C09J103/14C09J105/04C09J105/06C09J105/08C09J105/12C09J189/005C09J189/04C09J197/005C08L97/02B27N3/002C08L1/02C08L1/08C08L1/286C08L3/02C08L3/04C08L3/12C08L3/14C08L5/00C08L5/04C08L5/06C08L5/08C08L5/12C08L89/00C08L89/005C08L89/04C08L97/005C09J189/00C08J7/0427C08J2397/02C08J2489/00
Inventor 瓦伦·詹姆士·格里斯比
Owner NEW ZEALAND FOREST RES INST
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