Claims
- 1. A block copolymer having a molecular weight of about 5000-100,000 and the following repeating structural formula: ##STR4## wherein X consists essentially of the bivalent radical --(CH.sub.2).sub.4 --and the bivalent paraphenylene radical, the latter being present in minor amount sufficient to eliminate fiber fusion when the copolymer is scoured in boiling water, but not greater than about 13 weight percent of the total bivalent radical X and
- y=4-200
- z=4-200.
- 2. A method for producing a copolymer of poly (4,7-dioxadecamethyleneadipamide)-polycaprolactam containing terephthalic acid comprising:
- a. mixing salts of both ##STR5## b. heating the salts to form a random copolymer; and c. melt blending the random copolymer and polycaprolactam to form a copolymer having a molecular weight of about 5000-100,000 and the following structural formula: ##STR6## wherein x consists essentially of the bivalent radical --(CH.sub.2).sub.4 --and the bivalent paraphenylene radical, the latter being present in minor amount sufficient to eliminate fiber fusion when the copolymer is scoured in boiling water, but not greater than about 13 weight percent of the total bivalent radical X and
- y=4-200
- z=4-200.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 745,318 filed Nov. 26, 1976 now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2454118 |
May 1975 |
DEX |
2454119 |
May 1975 |
DEX |
2454142 |
May 1975 |
DEX |
Non-Patent Literature Citations (1)
Entry |
T. M. Frunze et al: "On Heterochain Polyamides XVIII Formation of Mixed Polyamides During Melting of The Homochain Compounds," High Molecular Weight Compounds (U.S.S.R.) 1, 500-505 (1959), No. 4, Apr. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
745318 |
Nov 1976 |
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