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1. (WO2019000103) ADHÉSIF POURVU DE PÉGOSITÉ ET UTILISATION DANS DES PRODUITS COMPOSITES À BASE DE BOIS
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CLAIMS:

We claim:

1. A curable hybrid resin composition comprising:

(a) water;

(b) one or more polysaccharide or polypeptide biopolymers;

(c) one or more monomers or oligomers having an average degree of polymerization of 4 or less; and,

(d) one or more isocyanates,

wherein a ratio of the one or more monomers or oligomers to the one or more biopolymers is in the range of about 30:70 to about 80:20 by weight.

2. The composition of claim 1 wherein the one or more biopolymers comprise one or more amylaceous materials, preferably wherein the one or more biopolymers contain more than 80 wt% starch on a dry basis.

3. The composition of claim 1 or 2, wherein the one or more biopolymers comprise starch nanoparticles, preferably wherein the starch nanoparticles have an average particle size of 1 micron or less.

4. The composition of any of claims 1 to 3 wherein the one or more biopolymers comprise one or more proteinaceous materials, preferably wherein the one or more proteinaceous materials contain more than 15 wt% protein but less than 40% protein on a dry basis.

5. The composition of any of claims 1 to 4 wherein the ratio of the one or more monomers or oligomers to the one or more biopolymers is 37.5:62.5 by weight or more.

6. The composition of any of 1 to 5 wherein the ratio of the one or more monomers or oligomers the one or more biopolymers is 75:25 by weight or less.

7. The composition of any of claims 1 to 6 wherein the number-average degree of polymerization of the one or more biopolymers is 100 or more or 300 or more.

8. The composition of any of claims 1 to 7 wherein the one or more monomers or oligomers comprise a compound selected from the group of compounds with the ability to form hydrogen bonds.

9. The composition of any of claims 1 to 8 wherein the one or more monomers or oligomers comprise a compound selected from the group of compounds containing one or more free hydroxyl groups.

10. The composition of any of claims 1 to 9 comprising an oil phase in water, wherein the oil phase comprises an isocyanate.

11. A method of making a wood composite comprising a step of,

applying a composition to a wood based substrate wherein the composition comprises,

(a) water;

(b) one or more polysaccharide or polypeptide biopolymers; and,

(c) one or more monomers or oligomers having an average degree of polymerization of 4 or less,

wherein a ratio of the one or more monomers or oligomers to the one or more biopolymers is in the range of about 30:70 to about 80:20 by weight.

12. The method of claim 11 wherein the water, one or more biopolymers and one or more monomers or oligomers are applied to pieces of a substrate at a loading rate of about 1-7% by weight, based on dry substrate.

13. The method of claim 11 or 12 wherein the substrate comprises wood chips or wood fines.

14. The method of any of claims 11 to 13 further comprising applying one or more isocyanates to the substrate.

15. A composite material comprising

wood; and,

(i) one or more polysaccharide or polypeptide biopolymers, (ii) one or more monomers or oligomers having an average degree of polymerization of 4 or less, and (iii) one or more isocyanates, collectively having a total weight between 2% and 1 1 % of the weight of the wood on a dry basis.