Claims
- 1. A flame retardant composition comprising (i) a polyphenylene ether resin selected from the group comprising
- (1) a homopolymer having repeated structural units of the formula: ##STR59## where Q, Q', Q", and Q'" are independently selected from the group consisting of hydrogen, hydrocarbon radicals, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and phenyl nucleus, and Q', Q", and Q'" in addition may be halogen; and n represents the total number of monomer units and is an integer of at least 10;
- (2) a copolymer with repeating units ##STR60## wherein W may be methyl, Cl, Br, or I; and T, T' and T" may independently be alkyl of 1 to 3 carbons or aryl, alkaryl, haloaryl, arylalkyl of 6 to 12 carbons; or
- (3) blends of (1) or (2) with
- (a) vinyl aromatic resins wherein at least 10% by weight of the blend is derived from a vinyl aromatic monomer of the compound having the formula: ##STR61## wherein R.sup.7 and R.sup.8 are independently selected from the group consisting of lower alkyl or alkenyl groups of from 1 to 6 carbon atoms and hydrogen; R.sup.9 and R.sup.10 are independently selected from the group consisting of chloro, bromo, hydrogen, and lower alkyl of from 1 to 6 carbon atoms; R.sup.11 and R.sup.12 are independently selected from the group consisting of hydrogen and a lower alkyl or alkenyl group of 1 to 6 carbon atoms or R.sup.11 and R.sup.12 may be concatenated together with hydrocarbyl groups to form a naphthyl group; or
- (b) copolymers of the vinyl aromatic monomer of (i)(3)(a) above with materials having the general formula: ##STR62## wherein R.sub.13 and R.sub.14 represent a substituent independently selected from the group consisting of hydrogen, halogen, an alkyl group of 1 to 4 carbon atoms, carboalkoxy or R.sub.7 and R.sub.8 taken together represent an anhydride linkage of the structure--COOOC-- and R.sub.15 is hydrogen, vinyl, an alkyl or alkenyl group having 1 to 12 carbon atoms, cycloalkyl, carboalkoxy, alkoxy-alkyl, alkyl carboxy, ketoxy, halogen, carboxy, cyano or pyridyl and n is a whole number within the range of 0 to 9; and
- (ii) a flame retarding effective amount of a tetrahalophthalate ester flame retardant processing aid of the formula: ##STR63## wherein: (a) R is selected from the group consisting of hydrogen, an alkyl or substituted alkyl of 1 to 30 carbons, hydroxyalkyl of 2 to 20 carbons, polyhydroxyalkyl of 3 to 10 carbons, and ##STR64## where R.sup.8 is an alkyl or substituted alkyl of 1 to 18 carbons, and b is 1 to 50;
- (b) R.sup.1 is selected from the group consisting of hydrogen, an alkyl or substituted alkyl of 1 to 30 carbons, alkenyl or substituted alkenyl of 2 to 22 carbons, ##STR65## where R.sup.7 is an alkyl of 1 to 18 carbons; a polyhydroxyalkyl of 3 to 12 carbons; ##STR66## with the proviso that the valence of R.sup.1 is equal to q; (c) R.sup.2 is independently selected from the group consisting of H and CH.sub.3 ;
- (d) R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are independently selected from the group consisting of H and an alkyl of 1 to 18 carbons;
- (e) p is an integer of 0 to 50;
- (f) q is an integer of 1 to 6;
- (g) X is selected from the group consisting of O or NH; and
- (h) A is selected from the group consisting of Cl or Br; and
- (i) provided further that when p is zero and X is oxygen that R and R.sup.1 are other than a neopentyl group.
- 2. The composition of claim 1 wherein p is zero, and q is one and X is oxygen.
- 3. The composition of claim 2 wherein R and R.sup.1 are alkyl groups and A is Br.
- 4. The composition of claim 3, di-2-ethylhexyl tetrabromophthalate.
- 5. The compositions of claim 1 wherein the weight ratio of (i) to (ii) is within the range of about 100:1 to about 2:1.
- 6. The composition of claim 1 wherein said polyphenylene ether resin of (i) is a blend of the homopolymer of (1) and a vinyl aromatic resin of (3) wherein at least 10% by weight of the blend is the vinyl aromatic resin.
- 7. The composition of claim 6 wherein said polyphenylene ether of (i) is a blend of the homopolymer of (1) and polystyrene or a blend of the homopolymer of (1) and a copolymer of styrene and 1,3-butadiene.
- 8. The composition of claim 1 wherein said polyphenylene ether is a homopolymer of (1).
- 9. The composition of claim 1 wherein in said tetrahalophthalate ester of (ii) R is an alkyl or substituted alkyl of 1 to 10 carbons, A is Br, X is oxygen, p is 0 to 20, and q is 1 to 6.
Parent Case Info
This application is a continuation-in-part application of Ser. No. 06/777,043, filed Sept. 17, 1985, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
47-47981 |
Apr 1972 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
777043 |
Sep 1985 |
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