US4866137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid peroxidic compositions
Assignee: Arkema SRL
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Filing: 1988-11-04
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Granted: 1989-09-12
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Expires: 2008-11-04
Abstract
Abstract The invention relates to liquid peroxidic compositions containing: from 1 to 50 parts by weight of a diperoxide of formula: ##STR1## from 5 to 75 parts by weight of dicumyl peroxide; from 1 to 85 parts by weight of a peroxide of formula: ##STR2## wherein R is H or an alkyl group containing from 1 to 3 C atoms and wherein A is selected from the radical CH 3 and the phenyl radical, optionally substituted.
Inventors
- 👤 Alberto Pagliari
- 👤 Carlo Scotti
- 👤 Roberto Del Bianco
- 👤 Giorgio Angeloni
- 👤 Michele Merenda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:13
CPC Classifications
C; C07; C07C; C07C407/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
Cross-linked thermoplastic and/or elastomeric polymers and copolymers wherein the cross-linking agent is a liquid peroxidic composition containing: from 1 to 50 parts by weight of a diperoxide of the formula (II): ##STR9## the two substituting groups of the central aromatic ring being in meta and/or para position and the meta/para isomeric ratio being between 1.2 and 2.5 and preferably from 1.5 to 2.5; from 5 to 75 parts by weight of dicumyl-peroxide; and from 1 to 85 parts by weight of a peroxide of the formula: ##STR10## wherein R is H or an alkyl group containing from 1 to 3 C atoms, and wherein A is selected from the class consisting of the radical CH 3 , the phenyl radical, and substituted phenyl radicals.
Claim 2
Dependent Claim
124 words
Cross-linked thermoplastic and/or elastomeric polymers and copolymers wherein the cross-linking agent is a liquid peroxidic composition containing: from 1 to 50 parts by weight of a diperoxide of the formula (II): ##STR9## the two substituting groups of the central aromatic ring being in meta and/or para position and the meta/para isomeric ratio being between 1.2 and 2.5 and preferably from 1.5 to 2.5; from 5 to 75 parts by weight of dicumyl-peroxide; and from 1 to 85 parts by weight of a peroxide of the formula: ##STR10## wherein R is H or an alkyl group containing from 1 to 3 C atoms, and wherein A is selected from the class consisting of the radical CH 3 , the phenyl radical, and substituted phenyl radicals.
Claim 3
Dependent Claim
20 words
Cross-linked polyethylene polymers and copolymers, ethylene-propylene copolymers, and ethylene-vinylacetate copolymers, wherein the cross-linking agent is as defined in claim 1.
Claim 4
Dependent Claim
28 words
Cross-linked thermoplastic and/or elastomeric polymer and copolymer compositions as claimed in claim 1, wherein the liquid peroxidic composition contains from 50 to 75 parts by weight of dicumyl-peroxide.
Claim 5
Dependent Claim
35 words
Cross-linked thermoplastic and/or elastomeric polymer and copolymer compositions as claimed in claim 1, wherein the meta/para isomeric ratio, for the peroxide of formula (III) is from 1.2 to 2.5 and preferably from 1.5 to 2.1.
Claim 6
Dependent Claim
36 words
Cross-linked thermoplastic and/or elastomeric polymer and copolymer compositions as claimed in claim 1, wherein the meta/para isomeric ratio, for the diperoxide of the formula (II), is from 1.2 to 2.5 and preferably from 1.5 to 2.1.
Claim 7
Dependent Claim
59 words
Cross-linked thermoplastic and/or elastomeric polymer and copolymer compositions as claimed in claim 1, containing: from 20 to 45 parts by weight of diperoxide of formula (II), wherein the meta/para isomeric ratio is from 1.2 to 2.5; from 50 to 75 parts by weight of dicumyl-peroxide; and from 1 to 25 parts by weight of peroxide of the formula: ##STR11##
Claim 8
Dependent Claim
51 words
Cross-linked thermoplastic and/or elastomeric polymer and copolymer compositions as claimed in claim 1, containing: from 20 to 45 parts by weight of diperoxide of the formula (II); from 50 to 70 parts by weight of dicumylperoxide; and from 1 to 25 parts by weight of a peroxide of the formula: ##STR12##
Claim 9
Dependent Claim
32 words
A method for the cross-linking of thermoplastic and/or elastomeric polymers and copolymers including polyethylene polymers and copolymers, ethylene-propylene copolymers, and ethylene-vinylacetate copolymers, comprising employing as cross-linking a composition according to claim 1.
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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |