Patent EP0426073A2 successfully refreshed from Google Patents.
EP0426073A2
Expired / Lapsed
EP
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Solid feeding of silane crosslinking agents into extruder
Assignee: General Electric Co
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Filing: 1990-10-29
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Granted: —
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Expires: 2010-10-29
Abstract
Abstract A process for producing a polymer crosslinkable by exposure to moisture in the presence of a hydrolysis/condensation catalyst comprising blending (i) a thermoplastic base polymer, (ii) a solid carrier polymer containing a silane, and (iii) a free radical generator; heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said base polymer; optionally, a free-radical generator, hydrolysis/condensation catalyst, and other additives are contained in the solid carrier polymer.
Inventors
- 👤 Willy Furrer
- 👤 Jacques Jean Francois Joseph Schombourg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/20; C08J3/22; C08J3/226; C08F; C08F255/00; C08F255/02; C08F255/026; C08L; C08L43/00; C08L43/04; C08J2323/00; C08J2323/02; C08J2423/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
158 words
A process for producing a polymer crosslinkable by exposure to moisture in the presence of a hydrolysis/condensation catalyst comprising: (a) blending (i) a thermoplastic base polymer; (ii) a solid carrier polymer substantially free of water having contained therein a silane having the formula wherein R′ represents a hydrogen or a methyl group; x and y are 0 or 1, with the proviso that when x is 1, y equals 1; n is an integer from 1 to 12 inclusive; each R independently represents a hydrolyzable organic group selected from the group consisting of alkoxy, aryloxy, aralkoxy, aliphatic acyloxy, oximo, alkylamino and arylamino, or a lower alkyl group having from 1 to 6 carbon atoms inclusive, with the proviso that not more than one of the three R groups is an alkyl; and (iii) a free radical generator; (b) heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said base polymer.
Claim 2
Dependent Claim
158 words
A process for producing a polymer crosslinkable by exposure to moisture in the presence of a hydrolysis/condensation catalyst comprising: (a) blending (i) a thermoplastic base polymer; (ii) a solid carrier polymer substantially free of water having contained therein a silane having the formula wherein R′ represents a hydrogen or a methyl group; x and y are 0 or 1, with the proviso that when x is 1, y equals 1; n is an integer from 1 to 12 inclusive; each R independently represents a hydrolyzable organic group selected from the group consisting of alkoxy, aryloxy, aralkoxy, aliphatic acyloxy, oximo, alkylamino and arylamino, or a lower alkyl group having from 1 to 6 carbon atoms inclusive, with the proviso that not more than one of the three R groups is an alkyl; and (iii) a free radical generator; (b) heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said base polymer.
Claim 3
Dependent Claim
53 words
A process according to claim 1 wherein said base polymer is a homopolymer of an alpha-olefin having 2 to 6 carbon atoms or a copolymer of two alpha-olefins, e.g. selected from the group consisting of copolymers of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, isobutylene, 2-methyl-1-butene 3-methyl-1-pentene, 4-methyl-1-pentene, 2,3-dimethyl-1-butene, 3,3-dimethyl-1-butene 2-ethyl-1-butene, and mixtures thereof.
Claim 4
Dependent Claim
46 words
A process according to claim 1 wherein said base polymer is selected from the group consisting of ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, ethylene acrylic acid copolymer, and mixtures thereof with each other or with copolymers of ethylene and 1-butene, 1-hexene, 1-oxtene, or 4-methyl-1-pentene.
Claim 5
Dependent Claim
23 words
A process according to claim 1 wherein said base polymer is polyethylene or a copolymer of ethylene with 1-butene, 1-hexene, 1-octene, or 4-methyl-1-pentene.
Claim 6
Dependent Claim
24 words
A process according to at least one of the claims 1-4 wherein said carrier polymer is compatible with said base polymer and said silane.
Claim 7
Dependent Claim
37 words
A process according to at least one of the claims 1-5 wherein said carrier polymer is a porous polymer, e.g. selected from the group consisting of high density polyethylene, low density polyethylene and linear low density polyethylene.
Claim 8
Dependent Claim
21 words
A process according to claim 6 wherein said porous polymer has a pore volume from about 30 to about 90 percent.
Claim 9
Dependent Claim
19 words
A process according to at least one of the claims 6-7 wherein said porous polymer is in pellet form.
Claim 10
Dependent Claim
36 words
A process according to at least one of the claims 1-8 wherein the amount of said carrier polymer ranges from about 0.1 to about 20 weight percent, e.g. from about 0.7 to about 7 weight percent.
Claim 11
Dependent Claim
18 words
A process according to at least one of the claims 1-9 wherein said carrier polymer encapsulates said silane.
Claim 12
Dependent Claim
21 words
A process according to at least one of the claims 1-10 wherein said carrier polymer is readily swelled by said silane.
Claim 13
Dependent Claim
15 words
A process according to claim 11 wherein said carrier polymer is ethylene vinyl acetate copolymer.
Claim 14
Dependent Claim
24 words
A process according to at least one of the claims 1-12 wherein said silane is selected from the group consisting of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltri-iso-butoxysilane.
Claim 15
Dependent Claim
44 words
A process according to at least one of the claims 1-13 wherein said silane is present in an amount ranging from about 0.1 to about 20 weight percent, preferably from about 0.7 to about 7 weight percent based on the weight of the product.
Claim 16
Dependent Claim
31 words
A process according to at least one of the claims 1-14 wherein said free radical generator is selected from the group consisting of dicumyl peroxide and α,α′-bis ( tertiary -butylperoxy) di-isopropylbenzene.
Claim 17
Dependent Claim
35 words
A process according to claim 15 wherein said free radical generator is present in an amount ranging from about 0.01 weight percent to about 0.4 weight percent based on the total weight of the product.
Claim 18
Dependent Claim
29 words
A process according to at least one of the claims 1-16 wherein said hydrolysis/condensation catalysts are selected from the group consisting of dibutyltin dilaurate, dioctyltin dilaurate, and stannous octonoate.
Claim 19
Dependent Claim
30 words
A process according to claim 17 wherein said hydrolysis/condensation catalyst is present in an amount ranging from about 0.01 to 0.2 weight percent based on the total weight of product.
Claim 20
Dependent Claim
23 words
A process according to at least one of the claims 1-18 wherein said carrier polymer contains said silane and a free radical generator.
Claim 21
Dependent Claim
17 words
A process according to claim 19 wherein said carrier polymer contains other additives, e.g. a hydrolysis/condensation catalyst.
Claim 22
Dependent Claim
18 words
A crosslinked polymer product obtainable in accordance with the process of at least one of the claims 1-20.
Claim 23
Dependent Claim
112 words
A process according to claim 1 comprising (a) blending (i) a polyolefin polymer; (ii) a porous polymer compatible with said polyolefin and selected from the group consisting of high density polyethylene, low density polyethylene and linear low density polyethylene and wherein said porous polymer has a pore volume from about 30 to about 90 percent, a pore cross-section ranging from about 0.1 to about 5µm, and a pore cell size ranging from about 1 to about 30µm; said porous polymer having contained therein a vinylalkoxysilane; and (iii) a free radical generator; (b) heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said base polyolefin.
Claim 24
Dependent Claim
123 words
A process for producing crosslinked polymer comprising: (a) blending (i) a polyolefin polymer; (ii) a porous polymer compatible with said polyolefin selected from the group consisting of high density polyethylene, low density polyethylene and linear low density polyethylene and wherein said porous polymer has a pore volume from about 30 to about 90 percent, a pore cross-section ranging from about 0.1 to about 5µm, and a pore cell size ranging from about 1 to about 30µm; said porous polymer having contained therein a vinylalkoxysilane; and (iii) a free radical generator; (b) heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said polyolefin polymer. (c) exposing the mixture of (b) to a hydrolysis/condensation catalysts and water.
Claim 25
Dependent Claim
123 words
A process for producing crosslinked polymer comprising: (a) blending (i) a polyolefin polymer; (ii) a porous polymer compatible with said polyolefin selected from the group consisting of high density polyethylene, low density polyethylene and linear low density polyethylene and wherein said porous polymer has a pore volume from about 30 to about 90 percent, a pore cross-section ranging from about 0.1 to about 5µm, and a pore cell size ranging from about 1 to about 30µm; said porous polymer having contained therein a vinylalkoxysilane; and (iii) a free radical generator; (b) heating and mixing (i), (ii) and (iii) together at a temperature above the crystalline melting point of said polyolefin polymer. (c) exposing the mixture of (b) to a hydrolysis/condensation catalysts and water.
References Cited (Backward Citations)
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