Brominated epoxy polymers as wood coating flame retardant formulations

Patent metadata

Field	Value
Publication number	US-11118084-B2
Application number	US-202016817108-A
Country	US
Kind code	B2
Filing date	Mar 12, 2020
Priority date	Sep 12, 2013
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

The present invention discloses novel flame retardant aqueous formulations comprising micronized particles of brominated epoxy polymers having a predetermined molecular weight, their use as flame retardant coating of wood-based substrates, their preparation and flame-retarded wood-based substrates prepared by using them.

First claim

The invention claimed is:

1. A flame retarded wood-based substrate having a homogeneous flame retardant film thereon, said film comprising micronized particles of brominated epoxy polymer according to Formula I,

wherein n indicates the degree of polymerization having a molecular weight ranging from 1,000 to 5,000 grams/mol;
attached to the surface of said wood-based substrate, wherein:
said micronized particles have a size distribution of d50<5 micron, d90<10 micron and d99<30 micron;
said homogenous flame retardant film comprises a binding agent in an amount of at least 35% by weight; and
said homogenous flame retardant film optionally further comprises at least one additive selected from the group consisting of a flame retardant synergist, a smoldering suppressant agent, a surface active agent, an antifoaming agent, a preservative, a stabilizing agent, a thickening agent, a dispersing agent, a wetting agent, a suspending agent, a pH buffer, a hardener, a curing agent, a sequestering agent, a detergent, a dye, a pigment and any mixture thereof.

2. The flame retarded wood-based substrate of claim 1 , wherein said film is transparent.

3. The flame retarded wood-based substrate of claim 1 , wherein said wood-based substrate displays its original color.

4. The flame retarded wood-based substrate of claim 1 , having an “after flame” time ranging from 0 seconds to 10 seconds.

5. The flame retarded wood-based substrate of claim 1 , wherein said flammable wood-based substrate is a natural wood substrate or an engineered wood and any combination thereof.

Assignees

• Bromine Compounds Ltd

Inventors

• Wolfovich Meyrav Abecassis
• Swissa Smadar
• Lison Jakub
• Rapaport Ella

Classifications

• C08L33/00 Primary

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers · CPC title

• C08K3/2279

  of antimony · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• B32B21/08

  of synthetic resin · CPC title