Polymer comprising mesoporous flame retardant

Patent metadata

Field	Value
Publication number	US-9732205-B2
Application number	US-201615261554-A
Country	US
Kind code	B2
Filing date	Sep 9, 2016
Priority date	Nov 18, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Embodiments of the disclosure generally provide flame retardant compositions and methods comprising organic polymers, mineral fillers, high surface area mineral fillers and process aids. Compositions of the disclosure additionally are comprised of high surface area hydrated metal carbonate fillers, including the mesoporous amorphous magnesium carbonate filler Upsalite. The filler's porous structure and high surface area provides high water capacity, enhanced physical and chemical interaction with a polymer in composite, lower by weight loadings of filler in a composite, as well as effective flame retardancy.

First claim

What is claimed is:

1. A flame retardant material, comprising:
a polymer, wherein the polymer is one or more materials selected from the group consisting of: polyesters, polycarbonates, polyetherimides, polyamides, polyimides, polysulfones, acetal polymers, polyether ketones, acrylic polymers, halogenated polymers, polyphenylenes, polyphenylene ethers, polyphenylene sulfide, ABS polymers, polystyrene, melamine formaldehyde polymers, urea formaldehyde polymers, epoxy polymers, and their copolymers;
a flame retardant filler comprising a hydrated mesoporous amorphous magnesium carbonate; and
a process aid.

2. The flame retardant material of claim 1 , wherein the process aid is chemically bonded to surfaces of the flame retardant filler.

3. The flame retardant material of claim 2 , wherein the process aid comprises a coupling agent.

4. The flame retardant material of claim 3 , wherein the coupling agent is selected from the group consisting of silanes, titanates, zirconates, aluminates, unsaturated carboxylic acids, anhydrides, esters, and phosphates.

5. The flame retardant material of claim 1 , wherein the flame retardant filler comprises a plurality of particles having dimension between about 0.010 microns and about 25 microns.

6. The flame retardant material of claim 1 , wherein the flame retardant filler is present at a concentration between about 5 weight percent and about 50 weight percent of the flame retardant material.

7. The flame retardant material of claim 1 , further comprising a second filler selected from the group consisting of carbonate minerals, magnesium carbonate, hydromagnesite, huntite, hydroxide minerals, aluminum trihydroxide, magnesium hydroxide, brucite, boehmite, bauxite, borates, flame retardant synergists, clays, organoclays, and oxides of antimony.

8. The flame retardant material of claim 1 , wherein the flame retardant filler has a pore size distribution between about 2 nanometers and about 50 nanometers, and an average BET pore size between about 10 nanometers and about 20 nanometers.

9. The flame retardant material of claim 1 , wherein the flame retardant filler has a BET specific surface area between about 60 square meters per gram and about 1500 square meters per gram.

10. The flame retardant material of claim 1 , wherein the flame retardant filler adsorbs 0.11 gram water/gram filler or more at a relative humidity of 10% at room temperature, and 0.22 gram water/gram filler or more at a relative humidity of 90% at room temperature.

11. The flame retardant material of claim 1 , wherein the flame retardant filler does not degrade from one cycle, or more than one cycle, of hydration or dehydration.

12. The flame retardant material of claim 1 , wherein the flame retardant filler is a hydrated mesoporous amorphous magnesium carbonate.

13. The flame retardant material of claim 12 , wherein the flame retardant filler is saturated with water.

14. The flame retardant of claim 1 , further comprising a polyolefin.

15. The flame retardant material of claim 1 , wherein the flame retardant filler is selectively hydrated with at least 0.11 grams water/gram filler.

Assignees

• IBM

Inventors

• Kuczynski Joseph
• Miller Melissa K
• Williams Heidi D
• Zhang Jing

Classifications

• C08K9/00

  Use of pretreated ingredients · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• C08K7/24 Primary

  inorganic · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title

• C08K2003/267

  Magnesium carbonate · CPC title