US4107245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for manufacturing an object of cross-linked polymer
Assignee: ABB Norden Holding AB
•
Filing: 1975-09-04
•
Granted: 1978-08-15
•
Expires: 1995-09-04
Abstract
Abstract An object of cross-linked polymer, such as insulation for a cable conductor or a cable sheath, is formed by using a starting material containing a peroxide and a polymer material with the ability to undergo a cross-linking reaction in the presence of peroxide. The reaction is carried out during at least a part of the process in the presence of a substance which has the ability to undergo a color change during the cross-linking reaction of the polymer material so that a color change of the substance is obtained. There may also be added a dye which does not have the ability to undergo a color change during the cross-linking of the polymer material. The substance may be an aromatic compound containing at least one halogen atom and/or at least one heterocyclic ring in which ring there is at least one nitrogen atom to which no hydrogen atom is linked.
Inventors
- 👤 Gunnar Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/05; C08J; C08J3/00; C08J3/24; C08J3/248; B29K; B29K2101/00; B29K2101/10; B29K2301/00; B29K2301/10
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
123 words
Method of manufacturing an object of cross-linked polymer by using a peroxide, which comprises forming a starting material containing a peroxide and a polymer material with the ability to undergo a cross-linking reaction in the presence of the peroxide into an object and cross-linking the starting material during at least part of the manufacturing process in the presence of a substance with the ability to undergo a colour change during the cross-linking reaction of the polymer material, so that a colour change of the substance is achieved wherein said substance is an aromatic compound containing at least one halogen atom and/or at least one heterocyclic ring, in which ring there is at least one nitrogen atom to which no hydrogen atom is linked.
Claim 2
Dependent Claim
123 words
Method of manufacturing an object of cross-linked polymer by using a peroxide, which comprises forming a starting material containing a peroxide and a polymer material with the ability to undergo a cross-linking reaction in the presence of the peroxide into an object and cross-linking the starting material during at least part of the manufacturing process in the presence of a substance with the ability to undergo a colour change during the cross-linking reaction of the polymer material, so that a colour change of the substance is achieved wherein said substance is an aromatic compound containing at least one halogen atom and/or at least one heterocyclic ring, in which ring there is at least one nitrogen atom to which no hydrogen atom is linked.
Claim 3
Dependent Claim
27 words
Method according to claim 1, which comprises distributing the substance with the ability to undergo a colour change substantially uniformly in the starting material prior to forming.
Claim 4
Dependent Claim
34 words
Method according to claim 1, which comprises applying the substance with the ability to undergo a colour change in locally limited areas in the starting material in connection with the forming of the object.
Claim 5
Dependent Claim
27 words
Method according to claim 1, which comprises adding the substance with the ability to undergo a colour change to the starting material mixed with another polymer material.
Claim 6
Dependent Claim
42 words
Method according to claim 1, which comprises adding the substance with the ability to undergo a colour change to the starting material together with a dye without the ability to undergo a colour change during the cross-linking reaction of the polymer material.
Claim 7
Dependent Claim
24 words
Method according to claim 1, in which the aromatic compound contains a benzene ring with at least one halogen atom linked directly to it.
Claim 8
Dependent Claim
14 words
Method according to claim 6, in which the halogen atom is a chlorine atom.
Claim 9
Dependent Claim
38 words
Method according to claim 6 in which the substance with the ability to undergo a colour change is carbazole dioxazine violet ##STR15## thioindigo Bordeaux ##STR16## a compound with the formula ##STR17## or a compound with the formula ##STR18##
Claim 10
Dependent Claim
31 words
Method according to claim 1, in which the aromatic compound contains a heterocyclic 5- or 6-membered ring, which comprises at least one nitrogen atom to which no hydrogen atom is linked.
Claim 11
Dependent Claim
31 words
Method according to claim 1 in which the substance with the ability to undergo a colour change is a compound with the formula ##STR19## or a compound with the formula ##STR20##
Claim 12
Dependent Claim
30 words
Method according to claim 5, in which the dye without the ability to undergo a colour change is titanium dioxide, a compound with the formula ##STR21## or copper phthalocyanine ##STR22##
Claim 13
Dependent Claim
35 words
Method according to claim 1, in which the polymer material consists essentially of polyethylene, a copolymerisate of ethylene and propylene, a copolymerisate of ethylene and propylene with a dienmonomer, chloroprene, sulfochlorinated polyethylene or styrene-butadiene rubber.
Claim 14
Dependent Claim
26 words
Method according to claim 1, in which the peroxide consists essentially of di-α-cumyl peroxide, di-tert-butyl peroxide, di-(tert-butyl peroxi isopropylene) benzene, di-(tert-butylperoxi) trimethyl cyclohexane), or di-methyl-di(tert.butylperoxi) hexane.
Claim 15
Dependent Claim
13 words
Method according to claim 1, in which the object is formed by extrusion.
Claim 16
Dependent Claim
17 words
Method according to claim 1, in which the object is formed by injection moulding or compression moulding.
Claim 17
Dependent Claim
18 words
Method according to claim 14, in which the starting material is formed into insulation for a cable conductor.
Claim 18
Dependent Claim
16 words
Method according to claim 14, in which the starting material is formed into a cable sheath.
Claim 19
Dependent Claim
75 words
Cross-linkable composition containing a peroxide, a polymer material with the ability to undergo a cross-linking reaction in the presence of the peroxide, and a substance with the ability to undergo a colour change during the cross-linking reaction of the polymer material wherein said substance is an aromatic compound containing at least one halogen and/or at least one heterocyclic ring, in which there is at least one nitrogen atom to which one hydrogen atom is linked.
Claim 20
Dependent Claim
75 words
Cross-linkable composition containing a peroxide, a polymer material with the ability to undergo a cross-linking reaction in the presence of the peroxide, and a substance with the ability to undergo a colour change during the cross-linking reaction of the polymer material wherein said substance is an aromatic compound containing at least one halogen and/or at least one heterocyclic ring, in which there is at least one nitrogen atom to which one hydrogen atom is linked.
Claim 21
Dependent Claim
25 words
Cross-linkable composition according to claim 18, in which the substance with the ability to undergo a colour change is substantially uniformly distributed in the composition.
Claim 22
Dependent Claim
27 words
Cross-linkable composition according to claim 18, in which the substance with the ability to undergo a colour change is present in locally limited areas in the composition.
Claim 23
Dependent Claim
31 words
Cross-linkable composition according to claim 18, in which the substance with the ability to undergo a colour change is included in the composition as separate bodies containing also another polymer material.
Claim 24
Dependent Claim
29 words
Cross-linkable composition according to claim 18, in which the composition contains a dye without any ability to undergo a colour change during the cross-linking reaction of the polymer material.
Claim 25
Dependent Claim
24 words
Cross-linkable composition according to claim 18, in which the aromatic compound contains a benzene ring with at least one halogen atom directly linked thereto.
Claim 26
Dependent Claim
15 words
Cross-linkable composition according to claim 23, in which the halogen atom is a chlorine atom.
Claim 27
Dependent Claim
38 words
Cross-linkable composition according to claim 23 in which the substance with the ability to undergo a colour change: carbazole dioxazine violet ##STR23## thioindigo Bordeaux ##STR24## a compound with the formula ##STR25## or a compound with the formula ##STR26##
Claim 28
Dependent Claim
32 words
Cross-linkable composition according to claim 18, in which the aromatic compound contains a heterocyclic 5- or 6-membered ring, which comprises at least one nitrogen atom to which no hydrogen atom is linked.
Claim 29
Dependent Claim
32 words
Cross-linkable composition according to claim 18 in which the substance with the ability to undergo a colour change is a compound with the formula ##STR27## or a compound with the formula ##STR28##
Claim 30
Dependent Claim
30 words
Cross-linkable composition according to claim 22, in which dye without the ability to undergo a colour change is titanium oxide, a compound with the formula ##STR29## or copper phthalocyanine ##STR30##
Claim 31
Dependent Claim
42 words
Cross-linkable composition according to claim 18, in which the polymer material in the composition consists essentially of polyethylene, a copolymerisate of ethylene and propylene, a copolymerisate of ethylene and propylene with a dienmonomer such as dicyclopentadiene, chloroprene, sulfochlorinated polyethylene or styrene-butadiene rubber.
Claim 32
Dependent Claim
27 words
Cross-linkable composition according to claim 18, in which the peroxide consists essentially of di-α-cumyl peroxide, di-tert-butyl peroxide, di-(tert-butyl peroxi isopropyl) benzene, di-(tert-butyl peroxi) trimethylcyclohexane or dimethyl-di(tert-butyl-peroxi) hexane.
Claim 33
Dependent Claim
21 words
Method according to claim 1, in which the substance with the ability to undergo a colour change is carbazole dioxazine violet.
Claim 34
Dependent Claim
22 words
Cross-linkable composition according to claim 18, in which the substance with the ability to undergo a colour change is carbazole dioxazine violet.
References Cited (Backward Citations)
US2084399A
Cited
US2500023A
Cited
US3030329A
Cited
US3891597A
Cited
US3773706A
Cited
US3931097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |