US4397992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Predispersed liquid or low melting solid peroxide vulcanizing agent or coagent compositions
Assignee: Rhein Chemie Corp
•
Filing: 1982-04-21
•
Granted: 1983-08-09
•
Expires: 2002-04-21
Abstract
Abstract A non-bleeding, predispersed composition useful for dispersing a peroxide vulcanizing agent or coagent into a rubber or plastic stock is disclosed which comprises (A) from about 20 to about 70 percent by weight of a peroxide vulcanizing agent or coagent, and (B) a multi-stage graft copolymer comprising (1) from about 70 to about 90 percent by weight of a hard portion made by graft polymerizing (a) a monomer or monomers selected from the group consisting of lower alkyl methacrylates, styrene, and mixtures thereof, and (b) a small but effective amount of a cross-linking agent for said monomer or monomers, in any order onto (2) from about 10 to about 30 percent by weight of a rubbery portion comprising a polymer or copolymer made by polymerizing (a) a monomer selected from the group consisting of butadiene and lower alkyl acrylates or (b) a mixture of monomers selected from the group consisting of styrene and butadiene, and acrylonitrile and butadiene.
Inventors
- 👤 Anders H. Johansson
- 👤 Thomas J. Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08F; C08F291/00; C08F291/02; C08J; C08J3/00; C08J3/20; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
157 words
A non-bleeding, predispersed composition useful for dispersing a peroxide vulcanizing agent or coagent into a rubber or plastic stock comprising (A) from about 20 to about 70 percent by weight of a peroxide vulcanizing agent or coagent, and (B) a multi-stage graft copolymer comprising (1) from about 70 to about 90 percent by weight of a hard portion made by graft polymerizing (a) a monomer or monomers selected from the group consisting of lower alkyl methacrylates, styrene, and mixtures thereof, and (b) a small but effective amount of a cross-linking agent for said monomer or monomers, in any order onto (2) from about 10 to about 30 percent by weight of a rubbery portion comprising a polymer or copolymer made by polymerizing (a) at least one monomer selected from the group consisting of butadiene and lower alkyl acrylates or (b) a mixture of monomers selected from the group consisting of styrene and butadiene, and acrylonitrile and butadiene.
Claim 2
Dependent Claim
157 words
A non-bleeding, predispersed composition useful for dispersing a peroxide vulcanizing agent or coagent into a rubber or plastic stock comprising (A) from about 20 to about 70 percent by weight of a peroxide vulcanizing agent or coagent, and (B) a multi-stage graft copolymer comprising (1) from about 70 to about 90 percent by weight of a hard portion made by graft polymerizing (a) a monomer or monomers selected from the group consisting of lower alkyl methacrylates, styrene, and mixtures thereof, and (b) a small but effective amount of a cross-linking agent for said monomer or monomers, in any order onto (2) from about 10 to about 30 percent by weight of a rubbery portion comprising a polymer or copolymer made by polymerizing (a) at least one monomer selected from the group consisting of butadiene and lower alkyl acrylates or (b) a mixture of monomers selected from the group consisting of styrene and butadiene, and acrylonitrile and butadiene.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein the peroxide vulcanizing agent is selected from the group consisting of dicumyl peroxide, α,α'-bis(t-butylperoxy)diisopropylbenzene, t-butyl cumyl peroxide, 2,5-dimethyl-2,5-bis(t-butylperoxy) hexyne-3, and 2,5-bis(t-butylperoxy)-2,5-dimethylhexane.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein the peroxide vulcanizing agent is dicumyl peroxide.
Claim 5
Dependent Claim
12 words
The composition of claim 2 wherein the peroxide vulcanizing agent is α,α'-bis(t-butylperoxy)diisopropylbenzene.
Claim 6
Dependent Claim
14 words
The composition of claim 2 wherein the peroxide vulcanizing agent is t-butyl cumyl peroxide.
Claim 7
Dependent Claim
13 words
The composition of claim 2 wherein the peroxide vulcanizing agent is 2,5-dimethyl-2,5-bis(t-butylperoxy) hexyne-3.
Claim 8
Dependent Claim
12 words
The composition of claim 2 wherein the peroxide vulcanizing agent is 2,5-bis(t-butylperoxy)-2,5-dimethylhexane.
Claim 9
Dependent Claim
28 words
The composition of claim 1 wherein the peroxide vulcanizing coagent is selected from the group consisting of triallyl isocyanurate, triallyl cyanurate, triallyl trimellitate, trimethylolpropane triacrylate, and trimethylolpropane trimethacrylate.
Claim 10
Dependent Claim
13 words
The composition of claim 8 wherein the peroxide vulcanizing coagent is triallyl isocyanurate.
Claim 11
Dependent Claim
13 words
The composition of claim 8 wherein the peroxide vulcanizing coagent is triallyl cyanurate.
Claim 12
Dependent Claim
13 words
The composition of claim 8 wherein the peroxide vulcanizing coagent is triallyl trimellitate.
Claim 13
Dependent Claim
13 words
The composition of claim 8 wherein the peroxide vulcanizing coagent is trimethylolpropane triacrylate.
Claim 14
Dependent Claim
13 words
The composition of claim 8 wherein the peroxide vulcanizing coagent is trimethylolpropane trimethacrylate.
Claim 15
Dependent Claim
18 words
The composition of claim 1 further comprising a small but effective amount of a free radical polymerization inhibitor.
Claim 16
Dependent Claim
12 words
The composition of claim 14 wherein the inhibitor is methyl ether hydroquinone.
Claim 17
Dependent Claim
23 words
The composition of claim 1 further comprising up to about 12 percent by weight of a finely divided reinforcing agent or filler material.
Claim 18
Dependent Claim
25 words
The composition of claim 1 further comprising up to about 15 percent by weight of a high molecular weight hydrocarbon polymer as a processing aid.
Claim 19
Dependent Claim
25 words
The composition of claim 1 comprising from about 50 percent by weight to about 60 percent by weight of the peroxide vulcanizing agent or coagent.
Claim 20
Dependent Claim
46 words
The composition of claim 1 wherein the cross-linking agent (1)(b) is selected from the group consisting of the dimethacrylic, trimethacrylic, diacrylic and triacrylic esters of polyhydric alcohols, divinylbenzene, divinyl esters of di- or tribasic acids, diallyl esters of polyfunctional acids, and divinyl ethers of polyhydric alcohols.
Claim 21
Dependent Claim
31 words
The composition of claim 1 wherein the monomer (2)(a) or mixture of monomers (2)(b) are polymerized with a small but effective amount of a cross-linking agent for the monomer or monomers.
Claim 22
Dependent Claim
72 words
The composition of claim 20 wherein the cross-linking agent (1)(b) may be the same as or different from the cross-linking agent for monomer (2)(a) or mixture of monomers (2)(b) and wherein both of said cross-linking agents are selected from the group consisting of the dimethacrylic, trimethacrylic, diacrylic and triacrylic esters of polyhydric alcohols, divinylbenzene, divinyl esters of di- or tribasic acids, diallyl esters of polyfunctional acids, and divinyl ethers of polyhydric alcohols.
Claim 23
Dependent Claim
38 words
The composition of claim 21 wherein both hard portion (1) and rubbery portion (2) comprise from about 0.1 to about 5 percent by weight of cross-linking agent based on the weight of the monomer or monomers in each.
Claim 24
Dependent Claim
23 words
The composition of claim 2 or 8 wherein monomer (1)(a) is a lower alkyl methacrylate and monomer (2)(a) is a lower alkyl acrylate.
Claim 25
Dependent Claim
17 words
The composition of claim 23 wherein monomer (1)(a) is methyl methacrylate and monomer (2)(a) is n-butyl acrylate.
Claim 26
Dependent Claim
18 words
The composition of claim 23 further comprising a small but effective amount of a free radical polymerization inhibitor.
Claim 27
Dependent Claim
23 words
The composition of claim 25 further comprising up to about 12 percent by weight of a finely divided reinforcing agent or filler material.
Claim 28
Dependent Claim
25 words
The composition of claim 25 further comprising up to about 15 percent by weight of a high molecular weight hydrocarbon polymer as a processing aid.
Claim 29
Dependent Claim
20 words
The composition of claim 2 or 8 wherein monomers (1)(a) are methyl methacrylate and styrene and monomer (2)(a) is butadiene.
Claim 30
Dependent Claim
18 words
The composition of claim 28 further comprising a small but effective amount of a free radical polymerization inhibitor.
Claim 31
Dependent Claim
23 words
The composition of claim 29 further comprising up to about 12 percent by weight of a finely divided reinforcing agent or filler material.
Claim 32
Dependent Claim
25 words
The composition of claim 29 further comprising up to about 15 percent by weight of a high molecular weight hydrocarbon polymer as a processing aid.
Claim 33
Dependent Claim
23 words
The composition of claim 2 or 8 wherein monomers (1)(a) are methyl methacrylate and styrene and monomer mixture (2)(b) is styrene and butadiene.
Claim 34
Dependent Claim
18 words
The composition of claim 32 further comprising a small but effective amount of a free radical polymerization inhibitor.
Claim 35
Dependent Claim
23 words
The composition of claim 33 further comprising up to about 12 percent by weight of a finely divided reinforcing agent or filler material.
Claim 36
Dependent Claim
25 words
The composition of claim 33 further comprising up to about 15 percent by weight of a high molecular weight hydrocarbon polymer as a processing aid.
References Cited (Backward Citations)
US2888424A
Cited
US2928801A
Cited
US2985632A
Cited
US3396152A
Cited
US3655825A
Cited
US3867481A
Cited
US3894979A
Cited
US3880791A
Cited
US3945966A
Cited
US4048036A
Cited
US4025706A
Cited
US4015058A
Cited
US4006283A
Cited
US4243773A
Cited
US3985704A
Cited
US4092285A
Cited
US4110240A
Cited
US4110240B1
Cited
US4239644A
Cited
US4202790A
Cited
US4268637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |