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US4885125A
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Method for in-mold polymerization of unsaturated compound
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-08-27
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Granted: 1989-12-05
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Expires: 2006-08-27
Abstract
Abstract An unsaturated compound having a vinyl or vinylidene group is rapidly in-mold polymerized by mixing the unsaturated compound containing a polymerization initiator and the unsaturated compound containing a polymerization accelerator, pouring the mixture into a mold cavity and polymerizing the monomer for not longer than 30 minutes.
Inventors
- 👤 Yasuyuki Kato
- 👤 Masahiro Yuyama
- 👤 Masahiko Moritani
- 👤 Yukio Yasunori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:17
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C67/246; C; C08; C08F; C08F2/00; C08F2/02; C08F2/38; C08F20/00; C08F20/02; C08F20/10; C08F20/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
62 words
A method for in-mold polymerization of an unsaturated compound having a vinyl or vinylidene group comprising: continuously mixing one portion of an unsaturated monomer compound containing a polymerization initiator and another portion of an unsaturated monomer compound containing a polymerization accelerator; continuously pouring the mixed monomer portions into a mold cavity; and polymerizing the monomer portion for not longer than 10 minutes.
Claim 2
Independent Claim
62 words
A method for in-mold polymerization of an unsaturated compound having a vinyl or vinylidene group comprising: continuously mixing one portion of an unsaturated monomer compound containing a polymerization initiator and another portion of an unsaturated monomer compound containing a polymerization accelerator; continuously pouring the mixed monomer portions into a mold cavity; and polymerizing the monomer portion for not longer than 10 minutes.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein the unsaturated monomer compound comprises at least one compound selected from the group consisting of methacrylates and acrylates.
Claim 4
Dependent Claim
20 words
The method according to claim 1, wherein the mold is kept in a temperature range between 50° and 150° C.
Claim 5
Dependent Claim
24 words
The method according to claim 1, wherein the polymerization initiator is a peroxide type radical polymerization initiator, and the polymerization accelerator is a reductant.
Claim 6
Independent Claim
14 words
The method according to calim 1, wherein the unsaturated monomer compound contains its polymer.
Claim 7
Independent Claim
14 words
The method according to calim 1, wherein the unsaturated monomer compound contains its polymer.
Claim 8
Dependent Claim
24 words
The method according to claim 5, wherein the content of the polymer in the unsaturated monomer compound is from 3 to 40% by weight.
Claim 9
Dependent Claim
49 words
The method according to claim 1, wherein the monomer to be polymerized is a member selected from the group consisting of a monomer of methacrylate or acrylate of a C 1 -C 25 aliphatic alicyclic or aromatic alcohol or phenol; vinyl nitriles; vinyl esters; methacrylic acid; and acrylic acid.
Claim 10
Dependent Claim
54 words
The method according to claim 7, wherein the monomer to be polymerized is a member selected from the group consisting of methyl methacrylate, ethyl methacrylate, butyl methacrylate, phenyl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, bornyl methacrylate, isobornyl methacrylate, methyl acrylate, ethyl acylate, butyl acrylate, phenyl acrylate, benzyl acrylate, cyclohexyl acrylate, bornyl acrylate and isobornyl acrylate.
Claim 11
Dependent Claim
24 words
The method according to claim 7, wherein the monomer to be polymerized is a member selected from the group consisting of acrylonitrile and methacrylonitrile.
Claim 12
Dependent Claim
26 words
The method according to claim 7, when the monomer to be polymerized is selected form the group consisting of vinyl acetate, vinyl propionate, and vinyl benzoate.
Claim 13
Dependent Claim
21 words
The method according to claim 1, wherein at least one other copolymerizable monomer is used with the monomer to be polymerized.
Claim 14
Dependent Claim
25 words
The method according to claim 11, wherein the copolymerizable monomer is a member selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, and maleic anhydride.
Claim 15
Dependent Claim
33 words
The method according to claim 1, wherein the radical polymerization initiator is a member selected from the group consisting of dialkyl perioxides, diacyl peroxides, peroxy esters, hydroperoxides, and ketone peroxides, and mixtures thereof.
Claim 16
Dependent Claim
36 words
The method according to claim 1, wherein the radical polymerization initiator is present in an amount of from 0.05 to 5 parts by weight per 100 parts by weight of the monomer optionally containing the polymer.
Claim 17
Dependent Claim
28 words
The method according to claim 1, wherein the polymerization accelerator is a member selected from the group consisting of sulfinates, thioureas, mercaptans, tertiary amines, and trivalent phosphorous compounds.
Claim 18
Dependent Claim
34 words
The method according to claim 1, wherein the polymerization accelerator is used in an amount of 0.05 to 5 parts by weight per 100 parts by weight of the monomer optionally containing the polymer.
Claim 19
Dependent Claim
37 words
The method according to claim 1, wherein said polymerization accelerator contains an auxiliary component selected from the group consisting of a heavy metal containing compound and a hydrogen halogenide salt of an amine or quaternary ammonium halogenide.
Claim 20
Dependent Claim
32 words
The method according to claim 1, wherein the portion of said unsaturated monomer compound containing the polymerization initiator is separate from the portion of said unsaturated monomer compound containing the polymerization accelerator.
Claim 21
Dependent Claim
24 words
The method according to claim 1, wherein pouring of the mixed monomer portions into said mold cavity occurs immediately after said portions are mixed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |