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 difficult to efficiently disperse small quantities of resin in the wood, lower resin loading, and more expensive uf and pf resins, and achieve the effects of improving performance properties, improving resistance to moisture, and enhancing toughness

Inactive Publication Date: 2015-02-12
EVERTREE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The invention provides protein adhesive compositions, methods of making and using such adhesives, and articles prepared using such adhesives. The protein adhesive compositions contain a reactive prepolymer, at least one additive, and a protein component that is ground plant meal or an isolated polypeptide composition obtained from plant biomass. The additives impart improved performance properties, such as improved resistance to moisture, enhanced toughness, improved resistance to distortion due to heat, and/or altered rheological properties. Exemplary additives include

Problems solved by technology

These high-temperature conditions can be problematic in certain structural (or engineered) lumber applications when UF and PF resins are used because it is often impractical to reach such high temperatures necessary to cure the adhesive due to the large size and inadequate heat transfer throughout the engineered wood composite.
However, PMDI resins are more costly that UF and PF resins.
Thus, lower resin loadings must be used in the composite to make these compos

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
Comparison scheme
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example 1

Isolation of Polypeptide Compositions

[0323]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.

[0324]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 10N 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 s...

example 2

Characterization of Polypeptide Compositions by Mass Spectrometry

[0352]This Example describes characterization of the various protein samples via MALDI Mass Spectrometry using an Ultraflex III instrument from Bruker.

[0353]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.

[0354]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

[0360]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 10N 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.

[0361]The dried powd...

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Abstract

The invention provides protein adhesives containing certain additives and methods of making and using such adhesives. The protein adhesives contain ground plant meal or an isolated polypeptide composition obtained from plant biomass in combination with certain additives, such as an exfoliated clay or partially exfoliated clay.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of and priority to U.S. Provisional Patent Application Ser. No. 61 / 532,806, filed Sep. 9, 2011, and to U.S. Provisional Patent Application Ser. No. 61 / 567,768, filed Dec. 7, 2011, the contents of each of which are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention provides protein adhesives containing certain additives, and methods of making and using such adhesives. The protein adhesives contain an additive and 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. Traditionally, these composites have been made using a urea formaldehyde (UF) res...

Claims

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Application Information

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IPC IPC(8): C09J199/00B32B21/08C09J175/04B32B38/00C09J11/04B32B37/12B32B37/16B32B7/12C09J189/00
CPCC09J199/00B32B7/12B32B21/08C09J175/04C09J189/00C09J11/04B32B2410/00B32B37/16B32B38/004B32B38/0012B32B2038/0076B32B2037/1269B32B2317/18B32B37/12C09J197/02C08H1/00C08L89/00C08L97/02C08G18/6446C08G18/7664C08G18/10C08G18/36C08G2170/80C08L63/00C08L75/04Y10T428/31663
Inventor PARKER, ANTHONY A.MARCINKO, JOSEPH J.
Owner EVERTREE
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