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Preservation of cellulosic materials, compositions and methods thereof

  • US 9,878,464 B1
  • Filed: 06/29/2012
  • Issued: 01/30/2018
  • Est. Priority Date: 06/30/2011
  • Status: Expired due to Fees
First Claim
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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.

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