Claims
- 1. A modified ethylene-maleic anhydride copolymer composition which comprises a malaxed statistical copolymer of ethylene and maleic anhydride having a melt index of between 0.1 and 500 dg/min. in the molten state and containing between 0.5 and 20% by weight of units derived from maleic anhydride and at least one chemical reagent containing at least two reactive groups which are amine or alcoholic --OH groups but at most one primary or secondary amine group and at least one alcoholic --OH group, wherein the chemical reagent is present in an amount such that the total number of primary amine, secondary amine and alcoholic --OH groups of said reagent to the number of anhydride groups of the copolymer is between 0.05 and 1.
- 2. The composition according to claim 1, in which the chemical reagent contains at least one other chemical group which is an ether, ester, amide or tertiary amine group.
- 3. The composition according to claim 1 in which the malaxation is carried out for 1 to 30 minutes at a temperature from 130.degree. to 250.degree. C.
- 4. The composition according to claim 1 in which the chemical reagent is a polyalcohol, a mono- or poly-alcohol which is a primary or secondary monoamine, a mono- or poly-alcohol which is a tertiary monoamine or polyamine and, optionally, a primary or secondary monoamine, or an amide of such an alcohol.
- 5. The composition according to claim 4 in which the chemical reagent is ethylene glycol, triethylene glycol, ethanolamine or the reaction product of ethylene oxide with hexamethylenediamine or diethylenetriamine.
- 6. The composition according to claim 1 in which a mineral filler, colouring pigment, blowing agent or compatible polymer or elastomer is incorporated into the copolymer.
- 7. The composition according to claim 1 in which the copolymer is also derived from a small amount of a third monomer which is an olefine or a vinyl or acrylic derivative.
- 8. The composition according to claim 7 in which the copolymer is derived from 0.5 to 1.5% by weight of ethyl maleate.
- 9. The composition according to claim 1 wherein the modified copolymer composition has a stress-cracking resistance time of more than 312 hours according to the standard specification ASTM D. 1693.
- 10. The composition according to claim 1 wherein the modified copolymer composition has an adhesion on a glass substrate of more than 2000 x 10.sup.3 dynes/cm according to standard specification ASTM D. 903.49.
- 11. The composition according to claim 1 which was slowly cooled between from 180.degree. to 130.degree. C in 40 minutes.
- 12. The composition as claimed in claim 1 which was slowly cooled between 180.degree. and 80.degree. C in 2 hours.
- 13. The composition according to claim 1 wherein the chemical reagent is a polyoxyethylenated alkylamine of the formula: ##STR2## wherein x + y is equal to 2 or 11.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7854/71 |
Mar 1971 |
UK |
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Parent Case Info
This is a continuation, of application ser. no. 396,405, filed Sept. 12, 1973, now abandoned which is a continuation of application Ser. No. 237,948 filed Mar. 24, 1972 now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2977334 |
Zopf et al. |
Mar 1961 |
|
3264272 |
Rees |
Aug 1966 |
|
3678016 |
Zimmerman et al. |
Jul 1972 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
7,007,125 |
Nov 1970 |
NL |
Continuations (2)
|
Number |
Date |
Country |
Parent |
396405 |
Sep 1973 |
|
Parent |
237948 |
Mar 1972 |
|