Flame retarded compositions

• US 8,991,321 B2
• Filed: 12/23/2010
• Issued: 03/31/2015
• Est. Priority Date: 12/24/2009
• Status: Expired due to Fees

• Current Assignee: Bromine Compounds Limited (ICL Group Ltd.)
• Original Assignee: Bromine Compounds Limited (ICL Group Ltd.)
• Inventors: Bar-Yaakov, Yoav, Hirschsohn, Yaniv, Finberg, Ita, Georlette, Pierre Alexandre
• Primary Examiner(s): Feely, Michael J
• Application Number:
  US13/517,292
• Publication Number:
  US 20120309869A1
• Time in Patent Office: 1,559 Days
• Field of Search: None
• US Class Current: 108/51.11
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/2279 of antimony
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 5/04 Oxygen-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08K 5/5337 containing also halogens
• CPC Class Codes: C08L 2201/02 Flame or fire retardant/resistant
• CPC Class Codes: C08L 2205/025 containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/00 Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 23/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins

Abstract

The invention relates to a polyethylene composition comprising a mixture of flame retardants which are bromine-containing polymers. The polyethylene composition is useful in the manufacture of pallets. A process for making the polyethylene composition through a masterbatch route is also disclosed.

Claims

1. A polyethylene composition comprising high density polyethylene, a mixture of flame retardants which are bromine-containing polymers, and an inorganic flame retardant synergist, said mixture of flame retardants comprising:

(a) poly(pentabromobenzyl acrylate);

(b) low molecular weight brominated epoxy resin of Formula (Ia);

2. The polyethylene composition according to claim 1, wherein the bromine content of the composition is between 1% and 7% (w/w) and the concentration of the inorganic synergist is not more than 4% (w/w).

3. The polyethylene composition according to claim 1, wherein the inorganic flame retardant synergist is antimony trioxide.

4. A process for preparing the polyethylene composition of claim 1, comprising:

forming a masterbatch comprising said mixture of flame retardants and optionally said inorganic flame retardant synergist; and

compounding said masterbatch with said high density polyethylene and with said inorganic flame retardant synergist if not present in the masterbatch.

5. The process of claim 4, comprising:

forming a masterbatch comprising said mixture of flame retardants, an inert polymer carrier, and optionally said inorganic flame retardant synergist; and

compounding said masterbatch with said high density polyethylene and with said inorganic flame retardant synergist if not present in the masterbatch;

wherein the inert polymer carrier is compatible with said high density polyethylene and said inorganic flame retardant synergist.

6. The process of claim 4, comprising:

forming a masterbatch comprising said mixture of flame retardants; and

compounding said masterbatch with said high density polyethylene and said inorganic flame retardant synergist.

7. Pallets comprising at least one structural unit made of the polyethylene composition according to claim 1.

8. A concentrate comprising:

(a) poly(pentabromobenzyl acrylate);

(b) low molecular weight brominated epoxy resin of Formula (Ia);