Claims
- 1. A flame-retardant synthetic polyester wherein a portion of said polyester consists of repeating units selected from the group consisting of ##SPC3##
- wherein X represents a bromine or chlorine atom and m is the integer 1 or 2, the concentration of said repeating units being equivalent to between 6 and about 15% of said X radical, based on the weight of polyester, when X represents bromine or between 12 and about 20% of said X radical when X represents chlorine, the remaining repeating units being selected from the group consisting of
- a. residues of aliphatic and aromatic dicarboxylic acids containing between 2 and 18 carbon atoms, and
- b. residues of alkyl, aralkyl and cycloalkyl diols containing between 2 and 12 carbon atoms, wherein said polyester contains at least one member from each of said groups (a) and (b).
- 2. The flame-retardant polymer of claim 1 wherein the polymer is an unsaturated polyester.
- 3. The flame-retardant polymer of claim 1 wherein X represents a bromine atom, and m is 2.
- 4. A flame-retardant polyester containing a multiplicity of pendant groups bonded to the polymer backbone wherein at least a portion of said pendant groups terminate in a radical of the general formula ##SPC4##
- wherein X represents a bromine or a chlorine atom, n is 1 or 2 and p is the integer 1, 2, or 3, and wherein the backbone of the polyester consists essentially entirely of repeating units selected from the group consisting of
- a. residues of aliphatic and aromatic dicarboxylic acids containing between 2 and 18 carbon atoms,
- b. residues of alkyl, aralkyl and cycloalkyl diols, wherein a portion of said residues contain said pendant groups, and wherein said backbone contains at least one member selected from each of said groups (a) and (b).
- 5. The flame-retardant polyester of claim 4 wherein the concentration of said pendant groups is equivalent to between 6 and about 15% of said X radical, based on the weight of said polyester, when X represents bromine or between 12 and 20% of said X radical when X represents chlorine.
BACKGROUND
This application is a continuation-in-part of abandoned application Ser. No. 316,706 filed Dec. 20, 1972, which in turn is a continuation-in-part of application Ser. No. 192,562 filed Oct. 26, 1971 and now abandoned.
US Referenced Citations (4)
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
316706 |
Dec 1972 |
|
Parent |
192562 |
Oct 1971 |
|