Flame retardant composition
The invention provides aflame retardant composition comprising and ammonium polyphosphate a silane functionalised ethylene copolymer.
1 . A flame retardant composition comprising:
a) an ammonium polyphosphate represented by the formula [NH 4 PO 3 ] n , wherein n is greater than 1000; and
b) a silane functionalised ethylene copolymer, which is a copolymer of ethylene and a silane containing comonomer and optionally one or more further comonomers;
wherein the melt flow rate, MFR 2 , of the silane functionalized ethylene copolymer is 0.1 to 10 g/10 min; and
wherein a weight ratio of the ammonium polyphosphate to the silane functionalized ethylene copolymer is in the range 9:1 to 3:1.
2 . The flame retardant composition according to claim 1 , wherein the silane functionalized ethylene copolymer is a polymer of ethylene (a) selected from:
(a1) a copolymer of ethylene and a silane group(s) containing comonomer; or
(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), and silane group(s) containing monomer, wherein copolymer (a2) is different from the polymer of ethylene (a1).
3 . The flame retardant composition according to claim 1 , wherein the silane functionalized ethylene copolymer is a terpolymer.
4 . The flame retardant composition according to claim 1 , wherein the silane functionalized ethylene copolymer comprises a silane group(s) containing comonomer of Formula (I):
R 1 SiR 2 q Y 3-q (I)
wherein
R 1 is an ethylenically unsaturated hydrocarbyl, hydrocarbyloxy or (meth)acryloxy hydrocarbyl group,
each R 2 is independently an aliphatic saturated hydrocarbyl group,
Y is the same or different, and is a hydrolysable organic group and wherein q is 0, 1 or 2.
5 . The flame retardant composition according to claim 1 , wherein said silane functionalized ethylene copolymer is a copolymer of ethylene with a methyl acrylate comonomer and a vinyl trimethoxysilane comonomer.
6 . A polymer composition comprising at least one polymer and the flame retardant composition of claim 1 .
7 . A process for coating a substrate with the flame retardant composition of claim 1 , said process comprising applying said composition to the surface of said substrate.
8 . A substrate comprising a fabric substrate, coated with the flame retardant composition of claim 1 .
9 . The substrate as claimed in claim 8 , wherein the fabric substrate is a woven or non-woven fabric.
10 . An article comprising at least one component formed from the coated substrate as defined in claim 8 .
11 . The article as claimed in claim 10 , wherein the article is selected from the group consisting of office furniture, vehicle interiors, seat cushions, back rest cushions, pillows, upholstered furniture, bed mattresses, wall coverings, shoes, sports bags, inlay of sky boots, sports equipment, carpets, rubber boats, PVC swimming pools, life vests, handbags, purses, table coverings, table mats, stationary, saddlebags, tool bags.
12 . The substrate as claimed in claim 9 , wherein the fabric substrate is a knitted fabric.
13 . The article as claimed in claim 11 , wherein the shoes comprise tongue, vamp, heel counter, quarter, or a combination thereof.
14 . The article as claimed in claim 11 , wherein the sports equipment comprises boxing gloves, boxing balls, or a combination thereof.
15 . The article as claimed in claim 11 , wherein the stationary comprises books, wood inlay, or any combination thereof.
16 . A flame retardant composition consisting of:
a) an ammonium polyphosphate; and
b) a silane functionalized ethylene copolymer;
wherein the melt flow rate, MFR 2 , of the silane functionalized ethylene copolymer is 0.1 to 10 g/10 min; and
wherein a weight ratio of the ammonium polyphosphate to the silane functionalized ethylene copolymer is in the range 9:1 to 3:1.
17 . The flame retardant composition according to claim 1 , wherein the ammonium polyphosphate has a solubility in water of less than 0.1 g/100 ml.