# US 2014/0154515 A1 · Polymer impregnated bamboo

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- Number: US 2014/0154515 A1
- Document ID: US20140154515A1
- Status: Published application
- Kind: A1
- Application number: 14/115,322
- Filed: 2012-05-02
- Published: 2014-06-05
- Earliest claimed: 2011-05-03
- Assignees: Kebony AB
- Inventors: Per Brynildsen; Stig Lande
- Web page: https://patentgrep.com/patent/US20140154515A1

## CPC

- B27K 3/343: {Heterocyclic compounds}
- B27K 1/00: Damping wood
- B27K 3/0278: {involving an additional treatment during or after impregnation}
- B27K 3/156: {Combined with grafting onto wood fibres}
- B27K 5/001: {Heating}
- B32B 9/02: comprising animal or vegetable substances {, e.g. cork, bamboo, starch}
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- C08L 71/14: Furfuryl alcohol polymers
- Y10T 428/31515: As intermediate layer
- Y10T 428/31591: Next to cellulosic
- Y10T 428/31957: Wood
- Y10T 428/31971: Of carbohydrate
- Y10T 428/4935: Impregnated naturally solid product [e.g., leather, stone, etc.]
- B27K: PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR (applying liquids or other fluent materials to surfaces in general B05; coating wood or similar material B44D); CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An engineering or constructional member comprising at least two strips bonded with an adhesive; each of the strips comprises bamboo impregnated or treated with a polymer derived from one or more furfuryl alcohol resin precursors.

## Claims

### Claim 1

Polymer impregnated bamboo comprising bamboo impregnated or treated with a polymer derived from one or more furfuryl alcohol resin precursors.

### Claim 2 (depends on 1)

Polymer impregnated bamboo as claimed in claim 1 wherein the furan resin precursors are selected from polymerisable monomers or oligomers selected from the group consisting of furfuryl alcohol (FA), bishydroxymethyl furan (BHMF), trihydroxymethyl furan (THMF), oligomers of FA, BHMF and THMF condensation products of these compounds and mixtures thereof.

### Claim 3 (depends on 1)

Polymer impregnated bamboo as claimed in claim 1 wherein the furan resin precursor is selected from the group consisting of: furfuryl alcohol, bis hydroxymethyl furan and oligomers and condensation products thereof.

### Claim 4 (depends on 1)

An engineering or constructional member comprising at least two strips bonded with an adhesive; wherein each of the strips comprises bamboo impregnated or treated with a polymer derived from one or more furfuryl alcohol resin precursors as claimed in claim 1.

### Claim 5 (depends on 4)

An engineering or constructional member comprising a plurality of members as claimed in claim 4 bonded with an adhesive selected from the group consisting of: epoxy resins, urea-formaldehyde resins, melamine-formaldehyde resins, methylene diphenyl isocyanate or polyurethane resins or other moisture resistant adhesives.

### Claim 6 (depends on 5)

An engineering or constructional member as claimed in claim 5 comprising a panel, board, decking, cladding, marine component, marine article, flooring, floor tile, constructional component, furniture or sporting equipment.

### Claim 7 (depends on 1)

A method of manufacture of polymer impregnated bamboo as claimed in claim 1 comprising the steps of impregnating the bamboo with a polymerisable composition comprising:
(i) one or more furan resin polymerisable monomers, or oligomers;
(ii) a catalyst;
(iii) a solvent selected from the group consisting of: water, acetone, C1-C4 alcohols and mixtures thereof; wherein the one or more wood compatible polymerises or monomers or oligomers has a boiling point not less than 50° C. higher than the boiling point of the solvent and atmospheric pressure; and
(iv) optionally one or more stabilisers or other ingredients;
to produce impregnated bamboo;
subjecting the impregnated bamboo or bamboo article to a water removal process; and
maintaining the bamboo at a higher temperature to form the polymeric material to produce polymer treated bamboo.

### Claim 8 (depends on 4)

An engineering or constructional member as claimed in claim 4 which is more resistant to attack by an insect, termite or other pest than a component made from untreated bamboo

### Claim 9 (depends on 4)

An apparatus for manufacture of an engineering or constructional member as claimed in claim 4 by polymer impregnation of bamboo comprising:
a container adapted to receive pieces of bamboo or one or more bamboo articles to be treated, the container having a pump for applying reduced pressure to the container;
a steam generator adapted to supply superheated steam to the chamber; and
sensors adapted to monitor parameters selected from pressure, temperature, humidity and concentration of volatile organic compounds within the container.

### Claim 10 (depends on 9)

An apparatus as claimed in claim 9, further comprising a carrier moveable into and out of the container, in use the carrier comprising a cage arranged to receive and retain pieces of bamboo, and a carriage on which the cage is mounted.

### Claim 11 (depends on 9)

An apparatus as claimed in claim 9, wherein an inlet for superheated steam is provided.

### Claim 12 (depends on 9)

An apparatus as claimed in claim 9, wherein a heat exchanger within the vessel is provided for direct heating.