Thermoplastic Composition for Wire or Cable Jacket
The present disclosure is directed to a thermoplastic composition. The thermoplastic composition comprises: a) a copolyether-ester; b) an ethylene acrylic copolymer as defined; and c) aluminum trihydrate (ATH), present in an amount of at least 40% by weight of the thermoplastic composition; wherein the weight ratio of the copolyether-ester to the ethylene acrylic copolymer in the thermoplastic composition ranges from 98:2 to 65:35. The present disclosure is also directed to a wire or cable jacket formed from the thermoplastic composition.
1 - 31 . (canceled)
32 . A thermoplastic composition comprising:
a) a copolyether-ester;
b) an ethylene acrylic copolymer comprising:
i) copolymerized units of a monomer having the structure:
wherein R 1 is hydrogen C 1 -C 12 alkyl, and R 2 is C 1 -C 12 alkyl, C 1 -C 20 alkoxyalkyl, C 1 -C 12 cyanoalkyl, or C 1 -C 12 haloalkyl, and wherein the polymerized units of the monomer are present in an amount ranging from about 40% to about 70% by weight of the ethylene acrylic copolymer;
ii) copolymerized units of an unsaturated carboxylic acid or an anhydride thereof, present in an amount of at least 2% by weight of the ethylene acrylic copolymer; and
iii) copolymerized units of ethylene; and
c) aluminum trihydrate (ATH), present in an amount of at least 40% by weight of the thermoplastic composition;
wherein the weight ratio of the copolyether-ester to the ethylene acrylic copolymer in the thermoplastic composition ranges from 98:2 to 65:35.
33 . The thermoplastic composition of claim 32 , which exhibits a melt flow index of at least 1 g/10 min, measured according to ASTM D1238-20 (procedure A), conducted at 170° C. using a 21 kg weight.
34 . The thermoplastic composition of claim 32 , which exhibits a tensile strength ranging from about 8 MPa to about 16 MPa, measured according to ASTM D420-6, die C, from a sample stamped from the machine direction of extruded tapes having a thickness of about 0.8 mm.
35 . The thermoplastic composition of claim 32 , which exhibits an elongation at break ranging from about 60% to about 230%.
36 . The thermoplastic composition of claim 32 , which exhibits a limiting oxygen index ranging from about 35% to about 60%, measured according to ASTM D2863-19, procedure A, using a type I specimen cut from a compression molded plaque.
37 . The thermoplastic composition of claim 32 , wherein the copolyether-ester is prepared from (i) a monomer comprising poly(tetramethylene oxide) glycol, poly(trimethylene oxide) glycol, polypropylene oxide glycol, or any mixture thereof; (ii) a dicarboxylic acid selected from isophthalic acid, terephthalic acid, or any mixture thereof; and (iii) a diol selected from 1,4-butanediol, 1,3-propanediol, or any mixture thereof.
38 . The thermoplastic composition of claim 32 , wherein the copolyether-ester is prepared from (i) a monomer comprising poly(tetramethylene oxide) glycol; (ii) isophthalic acid, terephthalic acid, or any mixture thereof; and (iii) a diol selected from 1,4-butanediol, 1,3-propanediol, or any mixture thereof.
39 . The thermoplastic composition of claim 32 , wherein the copolyether-ester is prepared from (i) a monomer comprising poly(tetramethylene oxide) glycol; (ii) a mixture of terephthalic acid and isophthalic acid, and (iii) 1,4-butanediol; or wherein the copolyether-ester is prepared from (i) a monomer comprising poly(tetramethylene oxide) glycol; (ii) terephthalic acid, and (iii) 1,4-butanediol.
40 . The thermoplastic composition of claim 32 , wherein the copolyether-ester is present in an amount ranging from about 20% to about 50% by weight of the thermoplastic composition.
41 . The thermoplastic composition of claim 32 , wherein the copolyether-ester has a peak melting temperature of about 210° C. or less, as measured according to ASTM D3418-08.
42 . The thermoplastic composition of claim 32 , wherein copolymerized units of the unsaturated carboxylic acid or the anhydride thereof are present in an amount ranging from about 2% to about 4% by weight of the ethylene acrylic copolymer.
43 . The thermoplastic composition of claim 32 , wherein the copolymerized units of ethylene are present in an amount ranging from about 28% to about 58% by weight of the ethylene acrylic copolymer.
44 . The thermoplastic composition of claim 32 , wherein the monomer (i) is methyl acrylate, butyl acrylate, or any combination thereof.
45 . The thermoplastic composition of claim 32 , comprising about 25% to about 40% of the copolyether-ester by weight of the thermoplastic composition and about 0.5% to about 12% of the ethylene acrylic copolymer by weight of the thermoplastic composition.
46 . The thermoplastic composition of claim 32 , comprising from about 40% to about 70% aluminum trihydrate by weight of the thermoplastic composition.
47 . The thermoplastic composition of claim 32 , which is free of magnesium hydroxide (MDH).
48 . The thermoplastic composition of claim 32 , further comprising a polydimethylsiloxane additive in an amount ranging from about 0.1° A to about 4% by weight of the thermoplastic composition.
49 . The thermoplastic composition of claim 48 , wherein the polydimethylsiloxane additive is a functionalized polydimethylsiloxane.
50 . A wire or cable jacket prepared from the thermoplastic composition of claim 32 .
51 . An optical fiber comprising the wire or cable jacket of claim 50 .