Patent US2313672A successfully refreshed from Google Patents.
US4048129A
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Preparing thermo-plastic or elastomeric materials for cross-linking of grafted silane
Assignee: KM Kabelmetal AG
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Filing: 1975-09-08
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Granted: 1977-09-13
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Expires: 1995-09-08
Abstract
Abstract Siloxane cross-linking of polyethylene is carried out under in situ development of water by chemical reaction between an organic acid and a non-hygroscopic metal oxide producing a neutral salt and water. Specifically, an ester peroxide is used as additive to be mixed with silane and polyethylene. The ester peroxide decomposes during grafting in free acid, alcohol and graft initiators for obtaining the grafting of silane on polyethylene, and the acid reacts with zinc oxide or tin oxide, also used as additive, to obtain salt and water. Alternatively, stearic acid or adipic acid and zinc oxide or tin oxide are added to a polyethylene silane mixture to develop water and salt of the acid.
Inventors
- 👤 Hermann Uwe Voigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:55
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08F; C08F8/00; C08F8/42; C08G; C08G77/00; C08G77/48; C08G77/50; H01B3/42; H01B3/421
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
70 words
In a method cross-linking thermo-plastic or elastomeric material in the presence of moisture, the material being prepared by grafting a silane compound, the improvement comprising the step of adding to and mixing with the material, compounds which form water by chemical reaction, the adding being carried out prior to grafting to obtain cross-linking of grafted silane through the water as formed in situ by the reaction and throughout the material.
Claim 2
Dependent Claim
70 words
In a method cross-linking thermo-plastic or elastomeric material in the presence of moisture, the material being prepared by grafting a silane compound, the improvement comprising the step of adding to and mixing with the material, compounds which form water by chemical reaction, the adding being carried out prior to grafting to obtain cross-linking of grafted silane through the water as formed in situ by the reaction and throughout the material.
Claim 3
Dependent Claim
19 words
In a method as in claim 1, wherein the formation of water is carried out by heating the material.
Claim 4
Dependent Claim
17 words
In a method as in claim 1, wherein the formation of water occurs during thermally induced grafting.
Claim 5
Dependent Claim
21 words
In a method as in claim 1, wherein the compounds added are mono-basic or multi-basic fatty acid and non-hygroscopic metal oxides.
Claim 6
Dependent Claim
23 words
In a method as in claim 4, wherein the acid is stearic or adipic acid, the metal oxide being tin or zinc oxide.
Claim 7
Dependent Claim
35 words
In a method as in claim 1, wherein the compounds are a peroxide forming an organic acid upon thermal decompositioning and a non-hygroscopic metal oxide combining with the acid to a neutral salt and water.
Claim 8
Dependent Claim
12 words
In a method as in claim 6, the peroxide being an ester-peroxide.
Claim 9
Dependent Claim
8 words
Method as in claim 7, using tert.butyl-per-3,5,5 trimethylhexanoate.
Claim 10
Dependent Claim
29 words
Method as in claim 4, wherein the metal oxide is added at not more than 10 preferably 0.5 to 2 parts by weight per 100 parts of the material.
Claim 11
Dependent Claim
23 words
Method as in claim 1, wherein the compounds include metal oxide suspended in a solution that includes silane and mixed with the material.
Claim 12
Dependent Claim
46 words
In a method as in claim 10, wherein the thermo-plastic or elastomeric material is provided in granular or powdery consistency, and the silane compound as well as said material compounds being added and agitated to obtain diffusion of the compounds into the granular or powder particles.
Claim 13
Dependent Claim
30 words
In a method as in claim 1, wherein the material is extruded following the adding of the silane compound and of said material commpounds, the chemical reaction occurring during grafting.
Claim 14
Dependent Claim
16 words
In a method as in claim 6, said metal oxide being tin oxide or zinc oxide.
Claim 15
Dependent Claim
36 words
In a method as in claim 1, wherein the material is polyethylene type polymer, the compounds are (i) a peroxide forming an organic acid upon thermal decompositioning preceding grafting proper, and (ii) tin or zinc oxide.
Claim 16
Dependent Claim
19 words
In a method as in claim 14, using about 0.5 to 2 parts metal oxide per 100 parts polymer.
Claim 17
Dependent Claim
10 words
In a method as in claim 14, using tert.-butyl-per-3,5,5 trimethylhexanoate.
Claim 18
Dependent Claim
52 words
In a method as in claim 14, wherein the polymer is provided in granular or powdery consistency, the silane compound and the tin oxide or zinc oxide being added to the granular or powdery material, and agitated therewith to obtain diffusion into the granular or powder particles; and extruding the resulting mixture.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |