Carbohydrate polyamine binders and materials made therewith

Abstract

A binder comprising the products of a carbohydrate reactant and polyamine is disclosed. The binder is useful for consolidating loosely assembled matter, such as fibers. uncured fibrous products comprising fibers in contact with a carbohydrate reactant and a polyamine are also disclosed. The binder composition may be cured to yield a fibrous product comprising fibers bound by a cross-linked polymer. Further disclosed are methods for binding fibers with the carbohydrate reactant and polyamine based binder.

1 .- 51 . (canceled) 
     
     
         52 . A composition comprising a collection of matter bound by a cured, thermoset, polymeric binder, wherein the cured, thermoset, polymeric binder comprises reaction products of drying and curing an aqueous binder solution containing reactants for producing the polymeric binder, wherein the reactants include a reducing sugar and a primary polyamine H 2 N-Q-NH 2 , wherein Q is alkyl, cycloalkyl, heteroalkyl, or cycloheteroalkyl, each of which is optionally substituted. 
     
     
         53 . The composition of  claim 52 , wherein the collection of matter comprises glass fibers present in the range from 70% to 99% by weight. 
     
     
         54 . The composition of  claim 52 , wherein the reducing sugar is selected from the group consisting of dextrose, xylose, fructose, dihydroxyacetone, and mixtures thereof. 
     
     
         55 . The composition of  claim 52 , wherein Q is an alkyl selected from the group consisting of C 2 -C 8 . 
     
     
         56 . The composition of  claim 52 , wherein the primary polyamine is 1,6-diaminohexane. 
     
     
         57 . The composition of  claim 52 , wherein a weight ratio of the reducing sugar to the primary polyamine is in the range of 2:1 to 10:1. 
     
     
         58 . The composition of  claim 52 , wherein a weight ratio of the reducing sugar to the primary polyamine is in the range of 3:1 to 6:1. 
     
     
         59 . The composition of  claim 52 , wherein the composition is a composite wood board. 
     
     
         60 . The composition of  claim 52 , wherein the composition is a composite wood board comprising a wax. 
     
     
         61 . The composition of  claim 52 , wherein the composition is a composite wood board having one or more of the following features:
 a modulus of elasticity (MOE) of at least 1800 N/mm 2 ,   a bending strength (MOR) of at least 18 N/mm 2 ,   an internal bond strength (IB) of at least 0.28 N/mm 2 ,   it swells less than or equal to about 12%, as measured by a change in thickness, after 24hours in water at 20° C.   a water absorption after 24 hours in water at 20° C. of less than or equal to 40%,   from 8% to 18% by dry weight of the binder.   
     
     
         62 . The composition of  claim 52 , wherein the composition is a composite wood board selected from a wood particleboard, an orientated strandboard and a medium density fiberboard. 
     
     
         63 . The composition of  claim 52 , wherein the collection of matter is a mineral fiber insulation product.