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Protein-containing adhesives, and manufacture and use thereof

a technology of adhesives and proteins, applied in the field of protein adhesives, can solve the problems of failure to produce a formulation with sufficient cohesive strength to produce particle board composites, and achieve the effect of increasing water resistance and optimizing the performance properties of particle boards

Inactive Publication Date: 2013-03-14
EVERTREE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides protein adhesive compositions that can be used to bond wood particles together to form a composite material, such as particle board. The adhesive compositions contain a plant protein composition, a lignin, a hydroxyaromatic compound, an aldehyde source, and optionally a reactive prepolymer, water, or an amine compound. The use of plant protein compositions made from waste by-products of the agricultural industry provides a more sustainable and cost-effective option compared to traditional adhesive compositions. The adhesive compositions can be cured by applying pressure, heat, or both to produce the composite material. The invention also provides a solid binder composition and a method of bonding articles together using the adhesive compositions.

Problems solved by technology

Experiments using lignin alone failed to produce a formulation with sufficient cohesive strength to produce a particle board composite.

Method used

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  • Protein-containing adhesives, and manufacture and use thereof
  • Protein-containing adhesives, and manufacture and use thereof
  • Protein-containing adhesives, and manufacture and use thereof

Examples

Experimental program
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example 1

Isolation of Polypeptide Compositions

[0274]Exemplary procedures for isolating and characterizing the water-insoluble polypeptide composition, water-soluble polypeptide composition, or a mixture thereof are described below.

Procedure A: Preparation of Water-Insoluble Polypeptide Composition and Preparation of Water-Soluble Polypeptide Composition.

[0275]Everlase digested protein from castor (experimental sample lot 5-90) was obtained from Prof. S. Braun at the Laboratory of the Department of Applied Biology at the Hebrew University of Jerusalem, Israel. Digested castor can be prepared as follows: castor meal protein is suspended in water at the ratio of about 1:10 w / w. Calcium chloride is added to an effective concentration of about 10 mM, and the pH of the suspension adjusted to pH 9 by the addition of 10 N NaOH. The reaction is then heated to 55° C. while stirring. Next, Everlase 16L Type EX® (NOVOZYMES') is added at the ratio of 20 g per kg of castor meal protein, and the mixture is...

example 2

Characterization of Polypeptide Compositions by Mass Spectrometry

[0302]This Example describes characterization of the various protein samples via MALDI Mass Spectrometry using an Ultraflex III instrument from Bruker.

[0303]The instrument was set in positive mode, in order to detect positive ions generated during the ionization process. The voltage applied to accelerate the ion into the TOF analyzer was set at 25 KV. The analysis was carried out by using the instrument in reflection mode which improves the resolution. Solid samples were dissolved in DMSO at a concentration of 10 mg / mL. Water-soluble supernatant fractions which were solvated in water.

[0304]Each sample solution was mixed with a matrix solution (for analytical purposes). The matrix was an inert compound of low molecular weight which absorbs at the same wavelength of the laser, Nd:YAG 355 nm. The matrices used were: α-CHCA, alpha-cyano-4-hydroxycinnamic acid, dissolved in a solution of ACN / H2O (70:30) with 0.1% of TFA at ...

example 3

Characterization of Polypeptide Compositions by Two-Dimensional Proton-Nitrogen NMR Correlation Spectra and Characterization of a Water-Insoluble / Water-Dispersible Polypeptide Fraction

[0310]The water-insoluble and water-soluble protein fractions were prepared as follows. Digested castor (lot 5-83) was suspended in water at the ratio of 1:10 w / w. Calcium chloride was added to the effective concentration of 10 mM, and the pH of the suspension was adjusted to pH 9 by the addition of 10 N NaOH. The reaction was heated to 55° C. while stirring. Everlase 16L Type EX® (NOVOZYMES') then was added at the ratio of 10 g per kg of castor meal protein, and the mixture was stirred at the same temperature for 4 hours. The resulting mixture then was brought to a pH 3.5 with citric acid and was spray-dried to yield a tan powder. Then, the water-insoluble and water-soluble protein fractions were harvested as described in Example 1 (Procedure A) and were allowed to air-dry at 23° C.

[0311]The dried pow...

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Abstract

The invention provides protein adhesives and methods of making and using such adhesives. One type of protein adhesive described herein contains lignin and ground plant meal or an isolated polypeptide composition obtained from plant biomass. Other types of protein adhesives described herein contain a plant protein composition and either a hydroxyaromatic / aldehyde, urea / aldehyde, or amine / aldehyde component.

Description

RELATED APPLICATIONS[0001]This application claims the benefit of and priority to U.S. Provisional Patent Application Ser. No. 61 / 532,832, filed Sep. 9, 2011, and to U.S. Provisional Patent Application Ser. No. 61 / 567,769, filed Dec. 7, 2011, the contents of each of which are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention relates to protein adhesives, and to methods of making and using such adhesives. The protein adhesives contain ground plant meal or an isolated polypeptide composition obtained from plant biomass, and are useful in the preparation of various wood products.BACKGROUND[0003]Adhesive compositions are used extensively in the wood products industry to make composites such as chipboard, fiberboard, and related composite wood products. Adhesive compositions are also used to make engineered lumber composites. Recent environmental concerns emphasize the need for adhesive compositions that are environmentally friendly. Adhesive compositions frequent...

Claims

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Application Information

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IPC IPC(8): C09J189/00B32B27/34B32B21/14B32B5/12B32B21/00B32B37/12B32B23/04
CPCB32B7/12B32B21/13B32B21/14C09J189/00Y10T428/24066C09J197/005C08L97/005C08L89/00Y10T428/31772Y10T428/31768Y10T428/31623B27N3/04B32B37/06B32B37/10B32B37/12B32B2305/72
Inventor PARKER, ANTHONY A.MARCINKO, JOSEPH J.
Owner EVERTREE
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