Strengthening compositions and treatments for lignocellulosic materials
OwnerBlair Alex Owens, Dimitris Ioannis Collias +1inventors
InventorsBlair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
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Abstract
The strength of lignocellulosic materials is improved by treating them with water-soluble strengthening agents containing sulfonic units, and rendering these agents water-insoluble by reacting them with compounds containing epoxide rings and quaternary ammonium groups. Thus, a substantial reduction or elimination of the bleeding of said strengthening agents from the lignocellulosic materials when touched with wet hands or contacted under humid conditions is achieved.
Claims12
A method of improving the strength under humid conditions of lignocellulosic material, said method comprising the steps of:
- a) applying a water-soluble strengthening agent having at least one nucleophilic sulfonic unit to the lignocellulosic material;
- and
- b) applying a compound having at least one epoxide ring and at least one quaternary ammonium group to the lignocellulosic material having said strengthening agent.
A method of improving the strength under humid conditions of lignocellulosic material, said method comprising the steps of:
- a) applying a compound having at least one epoxide ring and at least one quaternary ammonium group to the lignocellulosic material;
- and
- b) applying a water-soluble strengthening agent having at least one nucleophilic sulfonic unit to the lignocellulosic material having said epoxide ring and quaternary ammonium group compound.
A method of improving the strength under humid conditions of lignocellulosic material, said method comprising the steps of:
- a) mixing a compound having at least one epoxide ring and at least one quaternary ammonium group and a water-soluble strengthening agent having at least one nucleophilic sulfonic unit;
- and
- b) applying said mixture of said epoxide ring and quaternary ammonium group compound and water-soluble strengthening agent to the lignocellulosic material.
Dependencies are inferred from the claim text.