Aqueous bonding composition

Patent metadata

Field	Value
Publication number	US-10947426-B2
Application number	US-201815883185-A
Country	US
Kind code	B2
Filing date	Jan 30, 2018
Priority date	Aug 5, 2015
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

Disclosed is an aqueous bonding composition comprises: (A) a saccharide; (B) an inorganic acid ammonium salt; and (C) a metal salt, wherein the metal salt (C) comprises at least one selected from potassium salts, calcium salts, sodium salts, and magnesium salts. The aqueous bonding composition is excellent in balance among bending strength, bending strength under wet condition, water-absorption thickness expansion coefficient, and peeling strength. The aqueous bonding composition can be usefully used to produce a wood-based material. Further, a wood-based material obtainable by using the aqueous bonding composition is provided.

First claim

We claim:

1. An aqueous bonding composition consisting essentially of:
(A) a saccharide;
(B) an inorganic acid ammonium salt; and
(C) a metal salt that is potassium sulfate, sodium chloride, magnesium sulfate or magnesium chloride
wherein the aqueous bonding composition is characterized as having a cure profile of 140 to 170° C., 0.5 to 6.0 MPa for 3 to 7 minutes.

2. The aqueous bonding composition according to claim 1 , wherein the metal salt (C) is sodium chloride, magnesium sulfate or magnesium chloride.

3. The aqueous bonding composition according to claim 2 , wherein the metal salt (C) is magnesium chloride.

4. The aqueous bonding composition according to claim 1 , wherein the saccharide (A) comprises a structure derived from fructose.

5. The aqueous bonding composition according to claim 1 , wherein the inorganic acid ammonium salt (B) comprises at least one selected from ammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium sulfate, and ammonium chloride.

6. A wood-based material coated with the aqueous bonding composition according to claim 1 .

7. The aqueous bonding composition according to claim 1 , consisting essentially of 20-95 parts by weight of the saccharide (A), 1-50 parts by weight of the inorganic ammonium salt (B), and 0.5-50 parts by weight of the metal salt (C), based on 100 parts by weight of the total amount of components (A), (B), and (C).

8. The aqueous bonding composition according to claim 1 , consisting essentially of 60-85 parts by weight of the saccharide (A), 2-25 parts by weight of the inorganic ammonium salt (B), and 2-15 parts by weight of the metal salt (C), based on 100 parts by weight of the total amount of components (A), (B), and (C).

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Kakuda Atsushi
• Yoshida Yoshio

Classifications

• B32B21/04

  comprising wood as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/042; next to a bituminous or tarry layer B32B11/042; next to a water setting substance layer B32B13/10; next to a metal layer B32B15/10; next to a glass layer B32B17/062; next to a layer formed of natural mineral fibres or particles B32B19/042; next to a cellulosic plastic layer B32B23/044)} · CPC title

• C08K2003/166

  Magnesium halide, e.g. magnesium chloride · CPC title

• C09J105/00 Primary

  Adhesives based on polysaccharides or on their derivatives, not provided for in groups C09J101/00 or C09J103/00 · CPC title

• B32B21/042

  of wood (B32B21/13 takes precedence) · CPC title

• B27K3/16

  Inorganic impregnating agents · CPC title