Patent EP0169070A2 successfully refreshed from Google Patents.
EP0169070A2
Expired / Lapsed
EP
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Polymer composition
Assignee: Borealis Holding AS
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Filing: 1985-07-18
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Granted: —
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Expires: 2005-07-18
Abstract
Abstract A crosslinkable composition comprising (A) a copolymer of ethylene and an unsaturated silane compound having hydrolysable group(s) optionally with other comonomers and (B) a defined dihydrocarbyl tin (IV) carboxylate compound as silanol condensation catalyst. The tin compound is preferably dibutyl tin maleate. The composition can be thermoformed to produce articles having improved surface finish.
Inventors
- 👤 Jeffrey David Umpleby
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 14:26
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08K; C08K5/00; C08K5/56; C08K5/57
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A crosslinkable composition comprising: (A) A silyl copolymer prepared by copolymerising ethylene and an unsaturated silane compound having one or more hydrolysable groups, optionally together with one or more other monomers copolymerisable therewith, and (B) A silanol condensation catalyst comprising a dihydrocarbyl tin (IV) carboxylate compound characterised in that the carboxylate units in the tin compound are provided by a dicarboxylic acid.
Claim 2
Dependent Claim
62 words
A crosslinkable composition comprising: (A) A silyl copolymer prepared by copolymerising ethylene and an unsaturated silane compound having one or more hydrolysable groups, optionally together with one or more other monomers copolymerisable therewith, and (B) A silanol condensation catalyst comprising a dihydrocarbyl tin (IV) carboxylate compound characterised in that the carboxylate units in the tin compound are provided by a dicarboxylic acid.
Claim 3
Dependent Claim
43 words
A crosslinkable composition as claimed in Claim 1 wherein the carboxylate units in the tin compound are provided by a dicarboxylic acid having the general formula HOOC.X.COOH wherein X is a divalent organic group which preferably contains 1-12, most preferably 1-6 carbon atoms.
Claim 4
Dependent Claim
17 words
A crosslinkable composition as claimed in Claim 1 wherein the silanol condensation catalyst is dibutyl tin(IV) maleate.
Claim 5
Dependent Claim
39 words
A crosslinkable composition as claimed in any one of the preceding claims wherein the quantity of tin compound employed is in the range 0.01 to 5 % by weight based on the weight of silyl copolymer in the composition.
Claim 6
Dependent Claim
28 words
A crosslinkable composition as claimed in any one of the preceding claims wherein the unsaturated silane compound is vinyl trimethoxy silane, vinyl triethoxy silane or vinyl triacetoxy silane.
Claim 7
Dependent Claim
33 words
A crosslinkable composition as claimed in any one of the preceding claims wherein the silyl copolymer contains 0.5 to 5 weight % of copolymerised units of the unsaturated silane compound (based on copolymer).
Claim 8
Dependent Claim
70 words
A process for preparing a crosslinkable composition by blending together components comprising: (A) A silyl copolymer prepared by copolymerising ethylene and an unsaturated silane compound having one or more hydrolysable groups, optionally together with one or more other monomers copolymerisable therewith, and (B) A silanol condensation catalyst comprising a dihydrocarbyl tin (IV) carboxylate compound characterised in that the carboxylate units in the tin compound are provided by a dicarboxylic acid.
Claim 9
Dependent Claim
70 words
A process for preparing a crosslinkable composition by blending together components comprising: (A) A silyl copolymer prepared by copolymerising ethylene and an unsaturated silane compound having one or more hydrolysable groups, optionally together with one or more other monomers copolymerisable therewith, and (B) A silanol condensation catalyst comprising a dihydrocarbyl tin (IV) carboxylate compound characterised in that the carboxylate units in the tin compound are provided by a dicarboxylic acid.
Claim 10
Dependent Claim
38 words
A process as claimed in Claim 7 wherein the defined silanol condensation catalyst is incorporated in the composition as a masterbatch concentrate prepared by compounding the silanol condensation catalyst with a thermoplastic polymer, optionally together with other additives.
Claim 11
Dependent Claim
36 words
A process for manufacturing crosslinked articles comprising extruding the composition claimed in any one of claims 1 to 6 to formed a shaped article and treating the article with hot water or steam to cause crosslinking.
Claim 12
Dependent Claim
12 words
Extrusion coated wire or cable manufactured by the process of Claim 9.
References Cited (Backward Citations)
No citation records indexed.
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