Preservation of cellulosic materials, compositions and methods thereof
First Claim
Patent Images
1. A method for preserving cellulosic materials comprising:
- a. applying to the cellulosic material a composition so that at least one portion of the composition penetrates a surface of the cellulosic material and another portion of the composition coats the surface of the cellulosic material, wherein the composition consists of;
from about 2.0 wt % to about 20 wt % of a mixture of a first pre-polymer having a weight-average molecular weight (MWw) of from 5,000 to about 10,000 and a second pre-polymer having a weight-average molecular weight (MWw) of less than 5,000; and
a solvent; and
b. curing the composition and the cellulosic material in a curing step having a duration of at least three days and comprising a curing temperature of ambient temperature and a curing pressure between atmospheric pressure and about 24 psig, wherein the curing temperature and curing pressure are maintained for the duration of the curing step;
wherein the cellulosic material comprises wood, and wherein curing comprises polymerization.
2 Assignments
0 Petitions
Accused Products
Abstract
The disclosure relates to compositions for preservation of cellulosic materials and methods of applying compositions for preservation of cellulosic materials. The compositions comprise a pre-polymer and optional nonionic surfactants and other additives. Compositions of optional nonionic surfactant mixtures and pre-polymers can be used advantageously in methods to preserve cellulosic materials by application of the material with preservatives at ambient atmospheric pressures.
-
Citations
13 Claims
-
1. A method for preserving cellulosic materials comprising:
-
a. applying to the cellulosic material a composition so that at least one portion of the composition penetrates a surface of the cellulosic material and another portion of the composition coats the surface of the cellulosic material, wherein the composition consists of; from about 2.0 wt % to about 20 wt % of a mixture of a first pre-polymer having a weight-average molecular weight (MWw) of from 5,000 to about 10,000 and a second pre-polymer having a weight-average molecular weight (MWw) of less than 5,000; and a solvent; and b. curing the composition and the cellulosic material in a curing step having a duration of at least three days and comprising a curing temperature of ambient temperature and a curing pressure between atmospheric pressure and about 24 psig, wherein the curing temperature and curing pressure are maintained for the duration of the curing step; wherein the cellulosic material comprises wood, and wherein curing comprises polymerization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification