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Process of producing a water-curable, silane modified alkylene-alkyl acrylate copolymer by reacting an alkylene-alkyl acrylate copolymer with a polysiloxane predispersed in a thermoplastic resin matrix
| Details |
Inventors: Keogh, Michael J.;
Assignee: Union Carbide Corporation (Danbury, CT)
Primary Examiner: Briggs, Sr.; Wilbert J.
Assistant Examiner:
Attorney, Agent or Firm: Arvantes; James C., Brown; Robert C.
Relatively stable masterbatch compositions are provided comprising a matrix having a polysiloxane dispersed therein, prepared by admixing a solid or liquid matrix, a monomeric silane and a silane condensation catalyst with the result that the monomeric silane condenses to a polysiloxane which is dispersed throughout the matrix per se or as a reactant therein. The masterbatch composition can be admixed with alkylene-alkyl acrylate copolymers in the presence of an organic titanate, to produce water-curable compositions, containing water-curable, silane modified alkylene-alkyl acrylate copolymers, which are useful as extrudates about wires and cables providing protective coatings thereon. |
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DETAILED DESCRIPTION OF THE INVENTION The present invention provides moisture resistant, masterbatch compositions comprising a matrix having dispersed therein a polysiloxane, produced by admixing a monomeric silane and a silane condensation catalyst in a matrix with the result that the monomeric silane condenses to a polysiloxane which is dispersed throughout the matrix.
The resultant masterbatch composition is resistant to moisture and can be used to produce water-curable, silane modified alkylene-alkyl acrylate copolymers by admixing the desired amount of masterbatch, containing a known amount of polysiloxane, with an alkylene-alkyl acrylate copolymer in the presence of an organo titanate.
The moisture resistant masterbatch compositions of this invention comprise a matrix having dispersed therein a polysiloxane, per se or reacted with the matrix.
A particularly desirable masterbatch composition is one containing a polysiloxane having an organo titanate combined therewith.
Illustrative of materials which can be used as matrices are the thermoplastic resins such as ethylene polymers including ethylene homopolymers and copolymers.
The ethylene copolymers contain at least about 10 percent by weight ethylene and up to about 90 percent by weight of propylene and/or up to about 70 percent by weight of other organic compounds which are polymerizable with ethylene.
Exemplary of such compounds are butene-1, pentene-1, isoprene, butadiene, bicycloheptadiene, bicycloheptene, styrene and the like as well as alkyl acrylates, subsequently defined, exemplified by ethyl acrylate and also vinyl compounds such as vinyl acetate and the like.
Other suitable thermoplastic resins include chlorinated resins such as chlorinated polyethylenes, chloro waxes, styrene-butadiene rubbers, styrene-isoprene rubbers, nitrilebutadiene rubbers, silicon rubbers and oils, natural rubber, chlorosulfonated polyethylene, polypropylenes, ethylene-propylene-diene terpolymers, polychloroprene and the like.
Other suitable matrix materials are paraffin oils, ester plasticizers such as dioctylphthalate, nonylphthalate and the like
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Adhesives and Rubbers 
