Claims
- 1. A flame retardant polyester having a phosphorus atom content of 500-50,000 ppm containing a flame-retarding amount of a phosphorus containing compound represented by the following general formula (I): ##STR20## wherein each of R.sup.1 is a hydrogen atom or hydrocarbon group having 1-10 carbon atoms which may contain a hydroxyl group, and both R.sup.1 's may together form a dehydrated ring when both of R.sup.1 's represent hydrogen atoms, each of R.sup.2 and R.sup.3 is a member selected from the group consisting of halogen atoms and hydrocarbon groups having 1-10 carbon atoms, and each of n2 and n3 is an integer of 0-4.
- 2. A flame retardant polyester as claimed in claim 1 obtained by reacting the phosphorus-containing compound represented by the general formula (I) with terephthalic acid or an ester-forming derivative, and at least one glycol selected from the group consisting of alkylene glycols whose carbon atom number is less than 5 and 1,4-cyclohexane dimethanol or the ester-forming derivatives thereof.
- 3. A flame retardant polyester as claimed in claim 1 obtained by reacting the phosphorus-containing compound represented by the general formula (I) with a dicarboxylic acid or an ester-forming derivative thereof and glycol represented by the following general formula: ##STR21## wherein X represents a halogen atom, Y represents an alkylidene group, cycloalkylidene group, arylalkylidene group, --S--, --SO--, --SO.sub.2 -- or --O--, and m represents an integer of 1-4.
Priority Claims (4)
Number |
Date |
Country |
Kind |
50/124164 |
Oct 1975 |
JPX |
|
51/6924 |
Jan 1976 |
JPX |
|
51/15088 |
Feb 1976 |
JPX |
|
51/15090 |
Feb 1976 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 730,512, filed Oct. 7, 1976.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3702878 |
Saito |
Nov 1972 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
47-16436 |
Jan 1971 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
730512 |
Oct 1976 |
|