Wood adhesive, method for adhering wood materials using the same, and composite wood structure using the same

Abstract

A wood adhesive, a method for adhering wood materials using the same, and a composite wood structure using the same are disclosed. The wood adhesive comprises a first agent and a second agent, wherein the first agent comprises sodium carboxymethyl cellulose having a molecular weight from about 15,000 to about 500,000 and a degree of substitution from about 0.4 to about 2, and the second agent comprises polymeric quaternary amine.

What is claimed is: 
     
         1 . A wood adhesive, comprising:
 a first agent, comprising:
 sodium carboxymethyl cellulose having a molecular weight from 15,000 to 500,000 and a degree of substitution from 0.4 to 2; and 
   a second agent, comprising:
 polymeric quaternary amine. 
   
     
     
         2 . The wood adhesive according to  claim 1 , wherein the polymeric quaternary amine is reacted from polyamidoamine and epichlorohydrin. 
     
     
         3 . The wood adhesive according to  claim 1 , wherein
 the first agent further comprises water, and the sodium carboxymethyl cellulose is present in the aqueous phase, and   the second agent further comprises water, and the polymeric quaternary amine is present in the aqueous phase.   
     
     
         4 . The wood adhesive according to  claim 1 , having a pH value from 2 to 12. 
     
     
         5 . A method for adhering wood materials, comprising:
 providing a first wood block and a second wood block; and   bonding the first wood block with the second wood block by a wood adhesive, wherein the wood adhesive comprises a first agent and a second agent, the first agent comprises sodium carboxymethyl cellulose having a molecular weight from 15,000 to 500,000 and a degree of substitution from 0.4 to 2, and the second agent comprises polymeric quaternary amine.   
     
     
         6 . The method according to  claim 5 , wherein the bonding the first wood block with the second wood block step comprises:
 mixing the first agent and the second agent;   applying the wood adhesive to at least one of the first wood block and the second wood block; and   curing the wood adhesive.   
     
     
         7 . The method according to  claim 6 , wherein the first agent and the second agent is mixed at a ratio from 0.25:1 to 1:0.1. 
     
     
         8 . The method according to  claim 6 , wherein the first agent and the second agent is mixed at a ratio from 0.7:1 to 1:0.2. 
     
     
         9 . The method according to  claim 6 , wherein the curing the wood adhesive step comprises applying a pressure of 10 kg/cm 2  at 5° C. to 45° C. for 10 minutes to 30 minutes. 
     
     
         10 . The method according to  claim 9 , wherein the curing the wood adhesive step further comprises applying a pressure of 10 kg/cm 2  at 90° C. to 230° C. for 3 minutes to 25 minutes. 
     
     
         11 . The method according to  claim 5 , further comprising pre-treating the first wood block and the second wood block. 
     
     
         12 . The method according to  claim 11 , wherein the pre-treating the first wood block and the second wood block step comprises heating. 
     
     
         13 . 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 mixing a first agent and a second agent of a wood adhesive and curing the wood adhesive, wherein the first agent of the wood adhesive comprises sodium carboxymethyl cellulose having a molecular weight from 15,000 to 500,000 and a degree of substitution from 0.4 to 2, and the second agent of the wood adhesive comprises polymeric quaternary amine.   
     
     
         14 . The composite wood structure according to  claim 13 , wherein at least one of the first wood block and the second wood block comprises a particleboard, an oriented strand board, a fiberboard, a plywood, a block board, or a laminate.