Release compositions for lignocellulosic composites

Patent metadata

Field	Value
Publication number	US-9303113-B2
Application number	US-201013378705-A
Country	US
Kind code	B2
Filing date	Jun 15, 2010
Priority date	Jun 16, 2009
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Lignocellulosic composites are made by pressing a mixture of a particulate lignocellulosic material with polymeric MDI, in the presence of a fatty amine ethoxylate anti-masking agent.

First claim

What is claimed is:

1. A process for making a lignocellulosic composite article, comprising:
combining a lignocellulosic substrate with a polyfunctional isocyanate adhesive component to make a lignocellulosic composite substrate;
applying an anti-masking agent consisting of a compound having the chemical structure of Formula I and, optionally, a liquid carrier to the lignocellulosic composite substrate, a pressing surface, or both; and
applying pressure to the lignocellulosic composite substrate using the pressing surface to form the lignocellulosic composite article; and wherein Formula I is:

wherein R is a C 8 to C 40 linear or branched, saturated or unsaturated aliphatic group, n ranges from about 2 to about 50, and x ranges from about 1 to about 49; and
wherein the liquid carrier is selected from the group consisting of water, a liquid hydroxyl containing compound having 1 to 4 carbon atoms, and mixtures thereof.

2. The process of claim 1 , the liquid carrier is selected from the group consisting of water, a liquid hydroxyl containing compound having 1 to 4 carbon atoms, and mixtures thereof.

3. The process of any of claim 1 , wherein each of the alkoxylate groups of Formula I comprises at least 70 mole percent ethylene oxide.

4. The process of any of claim 1 , wherein a ratio of moles of ethylene oxide to moles of nitrogen in Formula I ranges from about 2 to about 50.

5. The process of any of claim 1 , wherein Formula I is a tallow amine ethoxylate.

6. The process of claim 1 , wherein the anti-masking agent is applied to the lignocellulosic composite substrate.

7. The process of claim 1 , wherein the lignocellulosic substrate comprises a plurality of lignocellulosic layers bonded together by a polyisocyanate adhesive composition having more than 10% by weight free isocyanate groups.

Assignees

• Grigsby Jr Robert A
• Moriarty Christopher J
• Singh Sachchida N
• Smith George A
• Huntsman Int Llc

Inventors

• Grigsby Jr Robert A
• Moriarty Christopher J
• Singh Sachchida N
• Smith George A

Classifications

• C08L97/02 Primary

  Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · CPC title

• B32B27/00

  Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} · CPC title

• C08G18/3275

  containing two hydroxy groups · CPC title

• C08G18/00

  Polymeric products of isocyanates or isothiocyanates · CPC title

• C08L75/00

  Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers · CPC title