Wood adhesive

Patent metadata

Field	Value
Publication number	US-10351737-B2
Application number	US-201816104691-A
Country	US
Kind code	B2
Filing date	Aug 17, 2018
Priority date	Sep 18, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A wood adhesive is provided. The wood adhesive includes a first agent and a second agent. The first agent includes a sodium carboxymethyl cellulose and a styrene-butadiene rubber polymer. The sodium carboxymethyl cellulose has a molecular weight between 15,000 and 500,000 and a degree of substitution of from 0.4 to 2.00 of the sodium salt. The second agent includes a polymeric quaternary amine.

First claim

What is claimed is:

1. A method for forming a wood adhesive, comprising:
providing a first agent, comprising:
preparing a water solution of sodium carboxymethyl cellulose comprising a sodium carboxymethyl cellulose having a molecular weight between 15,000 and 500,000 and a degree of substitution of from 0.4 and 2.00 of the sodium salt; and
adding a styrene-butadiene rubber polymer in the water solution of sodium carboxymethyl cellulose; and
adding NaOH in the water solution of sodium carboxymethyl cellulose mixed with the styrene-butadiene rubber polymer;
providing a second agent, comprising a polymeric quaternary amine; and
mixing the first agent and the second agent;
wherein a ratio of the weight of the styrene-butadiene rubber polymer to the sum of weights of the sodium carboxymethyl cellulose and the polymeric quaternary amine is in the range from 0.05:1 to 1:0.1.

2. The method according to claim 1 , wherein a weight ratio of the first agent to the second agent is in the range from 0.25:1 to 1:0.05.

3. The method according to claim 1 , wherein a weight ratio of the first agent to the second agent is in the range from 0.7:1 to 1:0.2.

4. The method according to claim 1 , wherein a weight ratio of the sodium carboxymethyl cellulose to the polymeric quaternary amine is in the range from 0.05:1 to 1:0.05.

5. The method according to claim 1 , wherein the second agent further comprises water, and the polymeric quaternary amine exists in aqueous phase.

6. The method according to claim 1 , wherein the polymeric quaternary amine is formed by the reaction of polyamidoamine with epichlorohydrin.

7. The method according to claim 1 , further comprising adding at least one of an inorganic substance and an organic filler in the wood adhesive.

8. The method according to claim 7 , wherein the inorganic substance comprises flame retardant, and the organic filler comprises at least one of flour, starch and sawdust.

9. The method according to claim 1 , wherein the styrene-butadiene rubber polymer comprises carboxylate anion (—COO − ).

10. A composite wood structure, comprising:
a first wood block;
a second wood block; and
an adhesion layer bonding the first wood block with the second wood block, the adhesion layer is formed by following steps:
providing a first agent, comprising:
preparing a water solution of sodium carboxymethyl cellulose comprising a sodium carboxymethyl cellulose having a molecular weight between 15,000 and 500,000 and a degree of substitution of from 0.4 and 2.00 of the sodium salt; and
adding a styrene-butadiene rubber polymer in the water solution of sodium carboxymethyl cellulose; and
adding NaOH in the water solution of sodium carboxymethyl cellulose mixed with the styrene-butadiene rubber polymer;
providing a second agent, comprising a polymeric quaternary amine; and
mixing the first agent and the second agent;
wherein a ratio of the weight of the styrene-butadiene rubber polymer to the sum of weights of the sodium carboxymethyl cellulose and the polymeric quaternary amine is in the range from 0.05:1 to 1:0.1.

Assignees

• Ind Tech Res Inst

Inventors

• Chen Man-Lin
• Lin Hsien-Kuang
• Chan Der-Jaw
• Chen Sue-May

Classifications

• C08L79/02

  Polyamines · CPC title

• C08L25/04

  Homopolymers or copolymers of styrene · CPC title

• C08L9/06

  Copolymers with styrene · CPC title

• C09J101/286 Primary

  substituted with acid radicals (C09J101/282 takes precedence) · CPC title

• C09J177/00

  Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09J179/06; based on polyamide-imides C09J179/08); Adhesives based on derivatives of such polymers · CPC title