US4247667A
Expired / Lapsed
US
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Method of crosslinking poly-α-olefin series resins
Assignee: Furukawa Electric Co Ltd
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Filing: 1979-02-27
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Granted: 1981-01-27
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Expires: 1999-02-27
Abstract
Abstract A method of crosslinking poly-α-olefin series resins, comprising the steps of subjecting a resin composition to graft reaction under a volume ratio of oxygen to the resin composition set at less than 0.1 and at temperatures ranging between the thermal decomposition temperature of the radical generating agent and 230° C., said composition comprising at least one kind of poly-α-olefin series resin of polypropylene series resin, poly(butene-1) series resin or poly(4-methyl pentene-1) series resin; a radical generating agent of dibenzoyl peroxide or t-butyl perbenzoate; and a silane compound having the general formula of RR'SiY 2 , where "R" is a monovalent olefinically unsaturated hydrocarbon group or hydrocarbonoxy group, "Y" is an organic group capable of hydrolysis, and "R'" is a monovalent hydrocarbon group except aliphatic unsaturated hydrocarbon groups, or the group "Y" or "R" defined above, and bringing the resultant graft polymer into contact with water so as to cause crosslinking reaction under the action of a silanol condensation catalyst added to the reaction system before or after the graft reaction step.
Inventors
- 👤 Akio Nojiri
- 👤 Takashi Sawasaki
- 👤 Toshio Koreeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:55
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/04; C08F4/00; C08F4/28; C08F4/32; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5425
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
183 words
A method of crosslinking poly-α-olefin series resins, comprising the steps of subjecting a resin composition to graft reaction under a volume ratio of oxygen to the resin composition set at less than 0.1 and at temperatures ranging between the thermal decomposition temperature of the radical generating agent and 230° C., said composition comprising at least one kind of poly-α-olefin series resin selected from the group consisting of polypropylene series resin, poly(butene-1) series resin and poly(4-methyl pentene-1) series resin; a radical generating agent selected from the group consisting of dibenzoyl peroxide and t-butyl perbenzoate; and a silane compound having the general formula of RR'SiY 2 , where "R" is a monovalent olefinically unsaturated (i) hydrocarbon group or (ii) hydrocarbonoxy group, "Y" is an organic group capable of hydrolysis, and "R'" is a monovalent hydrocarbon group except aliphatic unsaturated hydrocarbon groups, or the group "Y" or "R" defined above, and brining the resultant graft polymer into contact with water so as to cause crosslinking reaction under the action of a silanol condensation catalyst added to the reaction system before or after the graft reaction step.
Claim 2
Independent Claim
183 words
A method of crosslinking poly-α-olefin series resins, comprising the steps of subjecting a resin composition to graft reaction under a volume ratio of oxygen to the resin composition set at less than 0.1 and at temperatures ranging between the thermal decomposition temperature of the radical generating agent and 230° C., said composition comprising at least one kind of poly-α-olefin series resin selected from the group consisting of polypropylene series resin, poly(butene-1) series resin and poly(4-methyl pentene-1) series resin; a radical generating agent selected from the group consisting of dibenzoyl peroxide and t-butyl perbenzoate; and a silane compound having the general formula of RR'SiY 2 , where "R" is a monovalent olefinically unsaturated (i) hydrocarbon group or (ii) hydrocarbonoxy group, "Y" is an organic group capable of hydrolysis, and "R'" is a monovalent hydrocarbon group except aliphatic unsaturated hydrocarbon groups, or the group "Y" or "R" defined above, and brining the resultant graft polymer into contact with water so as to cause crosslinking reaction under the action of a silanol condensation catalyst added to the reaction system before or after the graft reaction step.
Claim 3
Dependent Claim
16 words
The method according to claim 1, wherein dibenzoyl peroxide is used as the radical generating agent.
Claim 4
Dependent Claim
23 words
The method according to claim 1 or 2, wherein the amount of the radical generating agent ranges between 0.05 phr and 10 phr.
Claim 5
Dependent Claim
26 words
The method according to claim 1 or 2, wherein the silane compound is selected from the group consisting of γ-methacryloyloxypropyltrimethoxy silane, vinyltrimethoxy silane and vinyltriethoxy silane.
Claim 6
Dependent Claim
15 words
The method according to claim 3, wherein γ-methacryloyloxypropyltrimethoxy silane is used as the silane compound.
Claim 7
Dependent Claim
20 words
The method according to claim 1, wherein the amount of the silane compound ranges between 0.5 phr and 20 phr.
Claim 8
Dependent Claim
16 words
The method according to claim 1, wherein propylene homopolymer is used as said poly-α-olefin series resin.
Claim 9
Dependent Claim
34 words
The method according to claim 2, wherein said poly-α-olefin series resin is a copolymer consisting of at least 50% by weight of propylene component and the balance of at least one other olefin α-olefin.
Claim 10
Dependent Claim
38 words
The method according to claim 1 or 2 or 6, wherein said poly-α-olefin series resin is a propylene-ethylene copolymer consisting of 1 to 15% by weight of ethylene component and 99 to 85% by weight of propylene component.
Claim 11
Dependent Claim
13 words
The method according to claim 1, wherein the poly-α-olefin series resin is powdery.
Claim 12
Dependent Claim
37 words
The method according to claim 1 or 2, wherein the radical generating agent is added to the graft reaction system in the form of a solution prepared by dissolving said radical generating agent in an organic solvent.
Claim 13
Dependent Claim
24 words
The method according to claim 1 or 2, wherein the graft reaction is carried out at temperature of from 180° C. to 220° C.
Claim 14
Dependent Claim
14 words
The method according to claim 1, wherein hot water is used as the water.
Claim 15
Dependent Claim
60 words
The method of claim 12 wherein said volume ratio is less than 0.05, wherein said silane compound is selected from the group consisting of γ-methacryloyloxypropyltrimethoxy silane, vinyltrimethoxy silane and vinyltriethoxy silane, and wherein said poly-α-olefin series resin is a propylene-ethylene copolymer consisting of 1 to 15% by weight of ethylene component and 99 to 85% by weight of propylene component.
Claim 16
Dependent Claim
22 words
The method according to claim 14 wherein between 0.5 phr and 20 phr of γ-methacryloyloxypropyltrimethoxy silane is used as the silane compound.
References Cited (Backward Citations)
US3646155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |