Patent US829906A successfully refreshed from Google Patents.
EP0245938A2
Expired / Lapsed
EP
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Polymer composition
Assignee: BP Chemicals Ltd
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Filing: 1987-04-02
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Granted: —
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Expires: 2007-04-02
Abstract
Abstract A crosslinkable composition suitable for use as insulation for wire and cable comprising a silyl polymer, a filler, a water scavenger selected from an organic ortho-ester, an organic acetal, an organic ketal or a silane and, optionally, a silanol condensation catalyst. A major proportion of the silyl polymer is derived from olefin units. The filled silyl polymer compositions have good storage stability and on extrusion exhibit reduced premature crosslinking.
Inventors
- 👤 Jeffrey David Umpleby
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/54
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
135 words
A composition capable of being crosslinked by the action of water, optionally in the presence of a silanol condensation catalyst, the composition comprising (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition, and (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ wherein R₉, R₁₀, R₁₁, R₁₂, R₁₃ and R₁₄ are the same or different groups selected from hydrogen, hydrocarbyl and oxyhydrocarbyl, m is zero or an integer from 1 to 10, not more than one R group per silicon atom being hydrogen.
Claim 2
Dependent Claim
135 words
A composition capable of being crosslinked by the action of water, optionally in the presence of a silanol condensation catalyst, the composition comprising (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition, and (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ wherein R₉, R₁₀, R₁₁, R₁₂, R₁₃ and R₁₄ are the same or different groups selected from hydrogen, hydrocarbyl and oxyhydrocarbyl, m is zero or an integer from 1 to 10, not more than one R group per silicon atom being hydrogen.
Claim 3
Dependent Claim
129 words
A composition capable of being crosslinked by the action of water comprising (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ wherein R₉, R₁₀, R₁₁, R₁₂, R₁₃ and R₁₄ are the same or different groups selected from hydrogen, hydrocarbyl and oxyhydrocarbyl, m is zero or an integer from 1 to 10, not more than one R group per silicon atom being hydrogen and (D) a silanol condensation catalyst.
Claim 4
Dependent Claim
129 words
A composition capable of being crosslinked by the action of water comprising (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ wherein R₉, R₁₀, R₁₁, R₁₂, R₁₃ and R₁₄ are the same or different groups selected from hydrogen, hydrocarbyl and oxyhydrocarbyl, m is zero or an integer from 1 to 10, not more than one R group per silicon atom being hydrogen and (D) a silanol condensation catalyst.
Claim 5
Dependent Claim
37 words
A composition as claimed in claim 1 or 2 wherein the silyl polymer is prepared by copolymerising ethylene and an unsaturated silane compound having one or more hydrolysable groups in the presence of a free radical initiator.
Claim 6
Dependent Claim
32 words
A composition as claimed in claim 1 or 2 wherein the silyl polymer is prepared by grafting an unsaturated silane on to a base polymer in the presence of a grafting initiator.
Claim 7
Dependent Claim
23 words
A composition as claimed in claim 3 or 4 wherein the unsaturated silane is vinyl trimethoxy silane, vinyl triethoxy silane or vinyl triacetoxysilane.
Claim 8
Dependent Claim
33 words
A composition as claimed in any one of the preceding claims wherein the water scavenger comprises an orthoester selected from trimethyl orthoformate, triethyl orthoformate, triethyl orthoacetate, tributyl orthoformate, tributyl orthoacetate and triethyl orthopropionate.
Claim 9
Dependent Claim
31 words
A composition as claimed in any one of the preceding claims wherein the water scavenger comprises an acetal selected from 1,1-dimethoxy ethane; 1,1-diethoxyethane; 1,1-dibutoxyethane and 1,1-dimethoxypropane; or the cyclic acetal, 2-methyll-1,3-dioxolane.
Claim 10
Dependent Claim
29 words
A composition as claimed in any one of the preceding claims wherein the water scavenger comprises a ketal selected from 2,2-dimethoxypropane; 2,2-diethoxypropane and 2,2-dimethoxybutane; or the cyclic ketal 2,2-dimethyl-1,3-dioxolane.
Claim 11
Dependent Claim
24 words
A composition as claimed in any one of the preceding claims wherein the water scavenger comprises a silane selected from bismethoxy dimethylsiloxane and octyltrimethoxysilane.
Claim 12
Dependent Claim
31 words
A composition as claimed in any one of the preceding claims wherein the quantity of water scavenger employed is in the range 0.005 to 0.05 moles per kilogramme of the composition.
Claim 13
Dependent Claim
25 words
A composition as claimed in any one of the preceding claims in which the filler is selected from calcium carbonate, carbon black and titanium dioxide.
Claim 14
Dependent Claim
20 words
A composition as claimed in any one of claims 1 to 10 in which the filler is a metal hydroxide.
Claim 15
Dependent Claim
14 words
A composition as claimed in claim 12 in which the filler is aluminium trihydrate.
Claim 16
Dependent Claim
95 words
A process for producing a composition capable of being crosslinked by the action of water comprises compounding together; (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition, and (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ and optionally a silanol condensation catalyst.
Claim 17
Dependent Claim
95 words
A process for producing a composition capable of being crosslinked by the action of water comprises compounding together; (A) a silyl polymer substantially comprising polymerised olefin units (B) at least 2% by weight of filler, based on the total weight of the composition, and (C) as a water scavenger, one or more compounds selected from an organic ortho- ester, an organic acetal, an organic ketal and a silane, with the proviso that if the water scavenger is a silane it has the general formula: R₉ R₁₀ R₁₁-Si--[OSiR₁₂R₁₃] m -R₁₄ and optionally a silanol condensation catalyst.
Claim 18
Dependent Claim
23 words
A process as claimed in claim 14 in which the filler is treated with the water scavanger prior to incorporation into the composition.
Claim 19
Dependent Claim
15 words
Crosslinked or uncrosslinked articles fabricated from the composition claimed in any one of claims 1-13.
References Cited (Backward Citations)
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