Claims
- 1. A composition of matter consisting essentially of an ethylene-ethyl acrylate copolymer and dibutyltin dilaurate in an amount of about 0.001 to about 0.5 percent by weight based on the weight of said copolymer.
- 2. A composition of matter as defined in claim 1 wherein the dibutyltin dilaurate is present in an amount of about 0.005 to about 0.1 percent by weight.
- 3. A composition of matter as defined in claim 1 having as an added ingredient a halogenated flame retardant additive.
- 4. A composition of matter as defined in claim 1 having as an added ingredient aluminum trihydrate.
- 5. A composition of matter as defined in claim 3 wherein the halogenated flame retardant additive is ethylene(bis-tetrabromophthalimide).
- 6. A composition of matter as defined in claim 1 which is soaked with an organo titanate.
- 7. A composition of matter as defined in claim 6 wherein the organo titanate is tetraisopropyl titanate.
- 8. A composition of matter as defined in claim 1 which has a moisture content below about 500 ppm.
- 9. A composition of matter as defined in claim 1 which has a moisture content below about 300 ppm.
SUMMARY OF THE INVENTION
This application is a divisional of U.S. application Ser. No. 498,341, filed June 1, 1983, now U.S. Pat. No. 4,489,029.
The invention disclosed in this application relates to compositions, based on alkylene-alkyl acrylate copolymers and silanol condensation catalysts, which are useful in the preparation of water-curable, silane modified alkylene-alkyl acrylate copolymers. More particularly, this invention relates to a process of extruding water-curable, silane modified alkylene-alkyl acrylate copolymers and compositions based thereon about wires and cables to provide coverings, such as insulation and jacketing, characterized by improved properties.
Silane modified alkylene-alkyl acrylate copolymers described in U.S. Pat. Nos. 4,328,323, granted May 4, 1982 and 4,291,136, granted Sept. 22, 1981, are particularly desirable for use in extrusion applications as these polymers and compositions based thereon can be cured by a simple water treatment, as opposed to the more conventional peroxide cure, to crosslinked products of high crosslinked density. As a result, silane modified alkylene-alkyl acrylate copolymers, as described, and compositions based thereon are especially useful in extrusion applications, being capable of extrusion under a wide latitude of processing conditions.
The present invention, in one aspect, relates to compositions, based on alkylene-alkyl acrylate copolymers and silanol condensation catalysts, which are particularly useful in an improved process of extruding water-curable, silane modified alkylene-alkyl acrylate copolymers and compositions based thereon about wires and cables.
In the process aspect of this invention, an alkylene-alkyl acrylate copolymer or composition based thereon is admixed with a silanol condensation catalyst, the resultant composition soaked with an organo titanate catalyst and the soaked composition admixed with a polysiloxane or monomeric silane with the result that the alkylene-alkyl acrylate copolymer reacts with the polysiloxane or monomeric silane to form a product, containing a water-curable, silane modified alkylene-alkyl acrylate copolymer, which is then extruded about a wire or cable.
The process, as described, results in coverings, such as insulation and jacketing, about wires and cables which are characterized by a number of improved properties, as shown by the data of the examples of this application.
US Referenced Citations (5)
Foreign Referenced Citations (2)
| Number |
Date |
Country |
| 0019808 |
Feb 1983 |
JPX |
| 2101138 |
Jan 1983 |
GBX |
Divisions (1)
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Number |
Date |
Country |
| Parent |
498341 |
Jun 1983 |
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Patent Grant
4617338
