EP0501340A2
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EP
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Filled hydrolyzable copolymer compositions resistant to premature crosslinking
Assignee: Millennium Petrochemicals Inc
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Filing: 1992-02-21
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Granted: —
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Expires: 2012-02-21
Abstract
Abstract Improved filled silane copolymer compositions resistant to premature crosslinking during compounding and storage but which are readily hydrolyzed and undergo cure in the presence of silanol condensation catalyst are provided. The compositions are comprised of random copolymers of ethylene and vinyltriethoxysilane and contain relatively high levels of particulate fillers. Rubbery ethylene copolymers can also be included with the silane copolymer to produce compositions with superior physical properties. The invention also relates to the method of crosslinking these compositions by combining the filled silane copolymer compositions with a second component which has a silanol condensation catalyst dispersed in a polymer resin.
Inventors
- 👤 Craig C. Meverden
- 👤 Robert G. Silverman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:02
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/01; C08K3/013; C08K3/02; C08K3/04; C08L; C08L43/00; C08L43/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
57 words
A filled hydrolyzable silane copolymer composition resistant to crosslinking in the absence of a silanol condensation catalyst comprising a) 20 to 99 weight percent of a random ethylene-vinyltriethoxysilane copolymer having a melt index from 0.1 to 50 and from 0.1 to 20 weight percent vinyltriethoxysilane copolymerized; and b) 1 to 80 weight percent of a particulate filler.
Claim 2
Dependent Claim
39 words
A filled hydrolyzable silane copolymer composition according to Claim 1 which includes 5 to 70 weight percent rubbery ethylene copolymer having a melt index from 0.1 to 100 selected from ethylene-vinyl acetate copolymer, ethylene-alkyl acrylate copolymer, or ethylene-α-olefin copolymer.
Claim 3
Dependent Claim
29 words
The filled hydrolyzable silane copolymer composition according to Claim 1 or 2 which contains from 40 to 95 weight percent ethylene-vinyltriethoxysilane copolymer and 5 to 60 weight percent filler.
Claim 4
Dependent Claim
36 words
The filled hydrolyzable silane copolymer composition of Claim 2 or 3 which contains from 40 to 80 weight percent ethylene-vinyltriethoxysilane copolymer, 10 to 60 weight percent rubbery ethylene copolymer, and 10 to 60 weight percent filler.
Claim 5
Dependent Claim
32 words
The composition according to any of Claims 1 to 4 wherein the ethylene-vinyltriethoxysilane copolymer has a melt index from 0.2 to 10 and contains from 0.5 to 7.5 weight percent copolymerized vinyltriethoxysilane.
Claim 6
Dependent Claim
23 words
The composition according to any of Claims 1 to 5 wherein the filler is carbon black, aluminum trihydrate, magnesium hydroxide, or mixtures thereof.
Claim 7
Dependent Claim
24 words
The filled hydrolyzable silane copolymer composition of any of Claims 2 to 6 wherein the rubbery ethylene copolymer has less than about 30% crystallinity.
Claim 8
Dependent Claim
51 words
The filled hydrolyzable silane copolymer composition of any of Claims 2 to 7 wherein the ethylene-vinyl acetate copolymer contains from 8 to 60 percent vinyl acetate, the ethylene-alkyl acrylate copolymer contains from 5 to 50 percent alkyl acrylate or the ethylene-α-olefin copolymer contains from about 7 to 80 percent C₃₋₈ α-olefin.
Claim 9
Dependent Claim
40 words
The filled hydrolyzable silane copolymer composition of Claim 8 wherein the rubbery ethylene copolymer is an ethylene-vinyl acetate copolymer containing from 10 to 50 percent vinyl acetate or an ethylene n-butyl acrylate copolymer containing 5 to 50 percent n-butyl acrylate.
Claim 10
Dependent Claim
22 words
The filled hydrolyzable silane copolymer of any of Claims 1 to 9 which additionally contains from 0.01 to 1 weight percent antioxidant.
Claim 11
Dependent Claim
22 words
The composition according to Claim 10 in which the antioxidant is tetrakis[methylene 3-(3',5'-di-tertbutyl-4-hydrocinnamate)methane, thiodiethylene bis-(3,5-ditertbutyl-4-hydroxyhydrocinnamate), n-octadecyl-β-(3,5-ditertbutyl-4-hydroxyphenyl) propionate, distearylthiodipropionate, dilaurylthiodipropionate, or polymerized 1,2-dihydro-2,2,4-trimethylquinoline.
Claim 12
Dependent Claim
32 words
The filled hydrolyzable silane copolymer composition of any of Claims 1 to 11 wherein at least 70% of the original melt index is retained after storing under ambient conditions for six months.
Claim 13
Dependent Claim
111 words
A process for crosslinking filled silane copolymers comprising: (1) combining (a) a first hydrolyzable silane copolymer component comprising 20 to 99 weight percent random ethylene-vinyltriethoxysilane copolymer, said copolymer having a melt index 0.1 to 50 and from 0.1 to 20 weight percent vinyltriethoxysilane copolymerized, and 1 to 80 weight percent particular filler and (b) a second component comprising an olefin polymer and 0.25 to 10 weight percent silanol condensation catalyst, based on the weight of the olefin polymer; (2) processing the mixture of (a) and (b) to produce a homogeneous blend; (3) extruding the mixture to form an extruded article; and (4) contacting the extruded article with moisture to effect crosslinking.
Claim 14
Dependent Claim
55 words
A process for crosslinking filled silane copolymers according to Claim 13 wherein said step 1(a) also contains 5 to 70 weight percent rubbery ethylene copolymer having a melt index from 0.1 to 100 selected from ethylene-vinyl acetate copolymer, ethylene-alkyl acrylate copolymer and ethylene-α-olefin copolymer in addition to said random ethylene-vinyltriethoxysilane copolymer and said particulate filler.
Claim 15
Dependent Claim
64 words
The process of Claim 13 or 14 wherein the ethylene-vinyltriethoxysilane copolymer contains from 0.5 to 7.5 weight percent copolymerized vinyltriethoxysilane and has a melt index of 0.2 to 10 and carbon black, aluminum trihydrate, magnesium hydroxide or mixtures thereof and the silanol condensation catalyst is an organic base, carboxylic acid, organic titanate, or complexes or carboxylates of lead, cobalt, iron, nickel, zinc or tin.
Claim 16
Dependent Claim
31 words
The process of any of Claims 13 to 15 wherein the silanol condensation catalyst is a dialkyl tin carboxylate and constitutes from 0.5 to 5 weight percent of said second component.
Claim 17
Dependent Claim
29 words
The process of any of the Claims 13 to 16 wherein the olefin polymer is a homopolymer or copolymer of ethylene or propylene, polyethylene or an ethylene-vinyl acetate copolymer.
Claim 18
Dependent Claim
33 words
The process according to any of Claims 13 to 17 wherein for the preparation of the first component the filler and rubbery ethylene copolymer are premixed prior to incorporation of the ethylene-vinyltriethoxysilane copolymer.
Claim 19
Dependent Claim
25 words
The composition of any of Claims 1 to 12 mixed with an olefin polymer and silanol condensation catalyst for use in coating an electric conductor.
References Cited (Backward Citations)
No citation records indexed.
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