Patent US4680319A successfully refreshed from Google Patents.
US4680319A
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Accelerated crosslinking of polyolefins grafted with silanes
Assignee: CLEDIA Srl A CORP OF ITALY
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Filing: 1985-04-29
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Granted: 1987-07-14
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Expires: 2005-04-29
Abstract
Abstract Compositions based on silane-grafted olefin polymers which are cross-linkable after shaping and which contain from 0.1 to 10% by weight of crystalline zeolites in powder form and, preferably, also a cross-linking coagent consisting of an aryl-carboxilic acid and/or a cross-linking catalyst.
Inventors
- 👤 Franco Gimpel
- 👤 Corrado Brichta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K9/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
A composition crosslinkable by exposure to irradiation with electromagnetic microwaves or to water in liquid or vapor phasse, which comprises an olefin polymer having grafted thereon an unsaturated silane containing hydrolyzable groups, and 0.1 to 20% of a hydrated, partially dehydrated or dehydrated zeolite in powder form based on the weight of the olefin polymer.
Claim 2
Dependent Claim
55 words
A composition crosslinkable by exposure to irradiation with electromagnetic microwaves or to water in liquid or vapor phasse, which comprises an olefin polymer having grafted thereon an unsaturated silane containing hydrolyzable groups, and 0.1 to 20% of a hydrated, partially dehydrated or dehydrated zeolite in powder form based on the weight of the olefin polymer.
Claim 3
Dependent Claim
11 words
A composition according to claim 1, wherein the zeolite is dehydrated.
Claim 4
Dependent Claim
18 words
A composition according to claim 1, wherein the zeolite is zeolite A, X, Y or P or hydroxysodalite.
Claim 5
Dependent Claim
23 words
A composition according to claim 1, wherein 80% by weight of the zeolite consists of aggregates having a dimension between 1 and 15micrometers.
Claim 6
Dependent Claim
50 words
A composition according to claim 1, wherein the silane has the general formula R n Si(--O--CH 2 CH 2 R"--OR') 4-n wherein n=1 or 2, R' is an alkyl group having 1-4 C atoms, R" is H or CH 3 and R is a monovalent unsaturated hydrocarbon or hydrocarbonoxy radical.
Claim 7
Dependent Claim
24 words
A composition according to claim 1, comprising 1 to 25 parts of an arylcarboxylic acid crosslinking co-agent per 100 parts by weight of zeolite.
Claim 8
Dependent Claim
15 words
A composition according to claim 6, wherein the arylcarboxylic acid is supported on the zeolite.
Claim 9
Dependent Claim
50 words
A storage stable, crosslinkable composition prepared by melt kneading a mixture comprising an olefin polymer, an unsaturated silane containing hydrolyzable groups, 0.1 to 20% of a hydrated, partially dehydrated or dehydrated zeolite in powder form based on the weight of the olefin polymer, a grafting catalyst and a crosslinking catalyst.
Claim 10
Dependent Claim
50 words
A storage stable, crosslinkable composition prepared by melt kneading a mixture comprising an olefin polymer, an unsaturated silane containing hydrolyzable groups, 0.1 to 20% of a hydrated, partially dehydrated or dehydrated zeolite in powder form based on the weight of the olefin polymer, a grafting catalyst and a crosslinking catalyst.
Claim 11
Dependent Claim
11 words
A composition according to claim 8, wherein the zeolite is dehydrated.
Claim 12
Dependent Claim
18 words
A composition according to claim 8, wherein the zeolite is zeolite A, X, Y or P or hydroxysodalite.
Claim 13
Dependent Claim
24 words
A composition according to claim 8, wherein 80% by weight of the zeolite consists of aggregates having a dimension between 1 and 15 micrometers.
Claim 14
Dependent Claim
50 words
A composition according to claim 8, wherein the silane has the general formula R n Si(--O--CH 2 CH 2 R"--OR') 4-n wherein n=1 or 2, R' is an alkyl group having 1-4 C atoms, R" is H or CH 3 and R is a monovalent unsaturated hydrocarbon or hydrocarbonoxy radical.
Claim 15
Dependent Claim
24 words
A composition according to claim 8, comprising 1 to 25 parts of an arylcarboxylic acid crosslinking co-agent per 100 parts by weight of zeolite.
Claim 16
Dependent Claim
15 words
A composition according to claim 13, wherein the arylcarboxylic acid is supported on the zeolite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |