US4618654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base material for silane grafted, crosslinked thermoplastic or elastomeric material
Assignee: Kabelmetal Electro GmbH
•
Filing: 1982-11-16
•
Granted: 1986-10-21
•
Expires: 2002-11-16
Abstract
Abstract The base material for silance grafting is to be a mixture of at least 50% of a polyolefin (compound A) and of not more than 50% of a different polymer or elastomer serving as property modifier (compound B). The compound A is silane grafted separately or together with compound B. The grafted material is extruded around a conductor or a tube followed by crosslinking in the presence of moisture.
Inventors
- 👤 Hans-Martin Schmidtchen
- 👤 Hermann U. Voigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:17
CPC Classifications
C; C08; C08F; C08F255/00; B; B29; B29C; B29C48/00; B29C48/022; C08F255/02; C08F255/06; B29C48/03; B29C48/05; B29C48/06; B29C48/09; B29K; B29K2101/00; B29K2101/10; B29K2301/00; B29K2301/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
In a method for making cross-linked thermoplastic or elastomeric material, comprising: providing as a base material a blend (100%) of a component A and a component B, at a ratio of at least 50% by weight of component A to not more than 50% by weight, but at least 10% by weight of component B, wherein component A is comprised of a silane-graftable polyolefin or of one of its silane-graftable copolymers, and component B is a modifier being different from component A and having different physical properties, by being an elastomer or another polymer compatible with component A; providing a mixture of the base material and of silane at 0.5 to 10 parts silane per 100 parts by weight graftable base material together with additives needed for grafting, such as a grafting initiator; grafting the silane onto those macromolecules of the base material capable of receiving such silane; and subsequently forming the material into the desired shape prior to final crosslinking of the graft material in the presence of moisture.
Claim 2
Dependent Claim
170 words
In a method for making cross-linked thermoplastic or elastomeric material, comprising: providing as a base material a blend (100%) of a component A and a component B, at a ratio of at least 50% by weight of component A to not more than 50% by weight, but at least 10% by weight of component B, wherein component A is comprised of a silane-graftable polyolefin or of one of its silane-graftable copolymers, and component B is a modifier being different from component A and having different physical properties, by being an elastomer or another polymer compatible with component A; providing a mixture of the base material and of silane at 0.5 to 10 parts silane per 100 parts by weight graftable base material together with additives needed for grafting, such as a grafting initiator; grafting the silane onto those macromolecules of the base material capable of receiving such silane; and subsequently forming the material into the desired shape prior to final crosslinking of the graft material in the presence of moisture.
Claim 3
Dependent Claim
19 words
Method as in claim 1, wherein component A is polyethylene and component B is a silane-graftable polymer or elastomer.
Claim 4
Dependent Claim
11 words
Method as in claim 2, wherein the elastomer is ethylene-propylene rubber.
Claim 5
Dependent Claim
17 words
Method as in claim 1, wherein the components of the base material are blended prior to grafting.
Claim 6
Dependent Claim
34 words
Method as in claim 1, wherein component A is mixed first with said silane and said additives, and said silane is grafted prior to mixing the silane-grafted component A with the ungrafted component B.
Claim 7
Dependent Claim
37 words
Method as in claim 2, wherein each said components A and B is separately mixed with a silane or a silane compound and additives and is separately grafted; the grafted components A and B are subsequently blended.
Claim 8
Dependent Claim
17 words
Method as in claim 1, wherein component A is pure polyethylene and component B is an elastomer.
Claim 9
Dependent Claim
28 words
Method as in claim 7, wherein the weight ratio of component A to component B is about 70% to 90% component A and 30% to 10% component B.
Claim 10
Dependent Claim
12 words
Method as in claim 7, wherein component B is an ethylene-propylene rubber.
Claim 11
Dependent Claim
47 words
Method as in claim 1, wherein component A is a copolymer of ethylene with a small amount of at least one of the following acrylate, butene, hexene, propylene, and vinyl acetate; and component B is a thermoplastic polymer other than said copolymer upon which silane is grafted.
References Cited (Backward Citations)
US4058583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |