Methods for making high intensity flame resistant composites

• US 20070000597A1
• Filed: 06/30/2005
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Abandoned Application

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Wyss, Kurt, Pfister, Friedrich, Jeanrenaud, Yves
• Application Number:
  US11/170,879
• Publication Number:
  US 20070000597A1
• Time in Patent Office: Days
• US Class Current: 156/245
• CPC Class Codes: C04B 14/042 Magnesium silicates, e.g. talc, sepiolite
• CPC Class Codes: C04B 14/42 Glass
• CPC Class Codes: C04B 14/4668 of vulcanic origin
• CPC Class Codes: C04B 16/0675 from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C04B 18/24 Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper , cork
• CPC Class Codes: C04B 20/0052 Mixtures of fibres of different physical characteristics, e.g. different lengths
• CPC Class Codes: C04B 2111/00612 as one or more layers of a layered structure
• CPC Class Codes: C04B 28/26 Silicates of the alkali metals
• CPC Class Codes: C04B 40/02 Selection of the hardening environment
• CPC Class Codes: C04B 40/0218 Microwaves
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

Methods for making heat- and flame-resistant composites are provided. The composites are suitable for use as construction and furnishing panels and as covers for construction and furnishing panels.

Claims

1. A method for making a fire-resistant composite, comprising the step:

applying a silicate solution or dispersion to an intimate mixture of a non-melting fibre and a melting fibre.

2. The method of claim 1, wherein the non-melting fibres are selected from cellulose, wool, silk, aramids, polybenzimidazoles, polyimides, polyarenes, rayon, and mixtures of these.

3. The method of claim 1, wherein the melting fibres are selected from polyester, mixed polyetheresters, polyamide, polyolefins, polyphenylene sulfide (PPS), polyethertherketone (PEEK), poly(ether ketone ketone) (PEKK), PFA (copolymer of tetrafluoroethylene and perfluorovinylether), FEP (copolymer of tertafluoroethylene and hexafluoropropylene), melt spun fluorofibres (homopolymer of tetrafluoroethylene), glass or basalt fibres, and mixtures of these.

4. The method of claim 1, wherein the non-melting fibres are cellulose fibres and the melting fibres are polyester fibres.

5. The method of claim 1, wherein the silicate is potassium silicate, sodium silicate, or a mixture of alkali silicates.

6. The method of claim 1, additionally comprising the step of adding particles of serpentine mineral.

7. The method of claim 1, wherein the silicate is present at or about 50 to at or about 98 wt %, based on the weight of the composite.

8. The method of claim 1, wherein the melting fibres are used at or about 10 to at or about 55 wt %, based on the dry weight of the total fibre content.

9. The method of claim 1, wherein the fibres are in the form of a sheet having a thickness of not more than at or about 1 mm.

10. A method for making a heat- and flame-resistant composite laminate, comprising the steps:

(a) stacking a plurality of composites according to claim 1, to form a stack; and

(b) applying pressure and optionally heat to the stack to form a laminate.

11. A method for making a heat- and flame-resistant composite laminate, comprising the step:

applying pressure and optionally heat to a stack of two or more composites according to claim 1.

12. A method for making a heat- and flame-resistant composite comprising the step:

drying a slurry comprising;

non-melting fibres;

melting fibres;

at least one silicate; and

water.

13. A method according to claim 12, wherein the non-melting fibres are selected from cellulose, wool, silk, aramids, polybenzimidazoles, polyimides, polyarenes, rayon, and mixtures of these.

14. The method of claim 12, wherein the organic melting fibres are selected from polyester, mixed polyetheresters, polyamide, polyolefins, polyphenylene sulfide (PPS), polyethertherketone (PEEK), poly(ether ketone ketone) (PEKK), PFA (copolymer of tetrafluoroethylene and perfluorovinylether), FEP (copolymer of tetrafluoroethylene and hexafluoropropylene), melt spun fluorofibres (homopolymer of tetrafluoroethylene), glass or basalt fibres, and mixtures of these.

15. The method of claim 12, wherein the non-melting fibres are cellulose fibres and the melting fibres are polyester fibres.

16. The method of claim 12, wherein the silicate is potassium silicate, sodium silicate, or a mixture of alkali silicates.

17. The method of claim 12, wherein the slurry additionally comprises particles of serpentine mineral.

18. The method of claim 12, wherein prior to the step of drying, the slurry is moulded in a mould.

19. The method of claim 12, wherein the drying is accomplished by microwave heating.

20. A method for making a heat- and flame-resistant composite comprising the step:

adding a slurry comprising non-melting fibres, melting fibres, a silicate, and water to a water-miscible organic solvent, to form the composite as a coagulated mass.

21. A method according to claim 20, wherein the non-melting fibres are selected from cellulose, wool, silk, aramids, polybenzimidazoles, polyimides, polyarenes, rayon, and mixtures of these.

22. The method of claim 20, wherein the organic melting fibres are selected from polyester, mixed polyetheresters, polyamide, polyolefins, polyphenylene sulfide (PPS), polyethertherketone (PEEK), poly(ether ketone ketone) (PEKK), PFA (copolymer of tetrafluoroethylene and perfluorovinylether), FEP (copolymer of tetrafluoroethylene and hexafluoropropylene), melt spun fluorofibres (homopolymer of tetrafluoroethylene), glass or basalt fibres, and mixtures of these.

23. The method of claim 20, wherein the non-melting fibres are cellulose fibres and the melting fibres are polyester fibres.

24. The method of claim 20, wherein the silicate is potassium silicate, sodium silicate, or a mixture of alkali silicates.

25. The method of claim 20, wherein the slurry additionally comprises particles of serpentine mineral.

26. The method of claim 20, wherein the drying is accomplished by microwave heating.