Patent US5116547A successfully refreshed from Google Patents.
US5116547A
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Method of coloring polycarbonate extruded or molded products for optical members
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1990-07-20
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Granted: 1992-05-26
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Expires: 2010-07-20
Abstract
Abstract A method of coloring a polycarbonate extruded or molded product for optical members, which is colored by a liquid coloring process for obtaining a colored polycarbonate extruded or molded product for optical members by extrusion or injection molding. The process involves mixing a polycarbonate resin for optical members and a liquid coloring agent dispersion obtained by dispersing a coloring agent in a dispersing agent. The dispersing agent includes a specific saturated fatty acid ester or silicon oil. After mixing the polycarbonate resin and liquid coloring agent dispersion, the resulting mixture is melted and thereafter extruded or molded to form a product for optical members.
Inventors
- 👤 Shuji Tsukahara
- 👤 Toshikazu Umemura
- 👤 Kazuyoshi Ichise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:55
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/80; B29B7/88; B29B7/94; B29B7/30; B29B7/58; B29B7/60; B29C; B29C45/00; B29C45/0013; C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08K5/04; C08K5/10; C08K5/101; C08L; C08L69/00; B29C45/17; B29C45/18; B29C45/1816; B29K; B29K2995/00; B29K2995/0018; B29K2995/002; B29L; B29L2017/00; B29L2017/001; B29L2017/003; C08J2369/00; C08J2483/00; C08J2491/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
188 words
A method of coloring a polycarbonate extruded or molded product for optical members, which is colored by a liquid coloring process for obtaining a polycarbonate extruded or molded product for optical members, colored with a coloring agent, in an extruder or injection molding machine that extrudes or molds a polycarbonate resin for optical members; said process comprising mixing a polycarbonate resin for optical members and a liquid coloring agent dispersion obtained by dispersing a coloring agent in a dispersing agent, thereafter melting said resin and said dispersion, and subsequently forming a colored extruded or molded product for optical members wherein; said liquid coloring agent dispersion comprises a coloring agent comprising at least one of a dye and a pigment, and a dispersing agent comprising a saturated fatty acid ester comprising a full ester of a straight-chain or branched saturated monobasic fatty acid having 4 to 35 carbon atoms with a saturated monohydric or polyhydric alcohol having 2 to 35 carbon atoms; and said liquid coloring agent dispersion is used in an amount of from 0.05 to 2 parts by weight based on said polycarbonate resin for optical members.
Claim 2
Independent Claim
188 words
A method of coloring a polycarbonate extruded or molded product for optical members, which is colored by a liquid coloring process for obtaining a polycarbonate extruded or molded product for optical members, colored with a coloring agent, in an extruder or injection molding machine that extrudes or molds a polycarbonate resin for optical members; said process comprising mixing a polycarbonate resin for optical members and a liquid coloring agent dispersion obtained by dispersing a coloring agent in a dispersing agent, thereafter melting said resin and said dispersion, and subsequently forming a colored extruded or molded product for optical members wherein; said liquid coloring agent dispersion comprises a coloring agent comprising at least one of a dye and a pigment, and a dispersing agent comprising a saturated fatty acid ester comprising a full ester of a straight-chain or branched saturated monobasic fatty acid having 4 to 35 carbon atoms with a saturated monohydric or polyhydric alcohol having 2 to 35 carbon atoms; and said liquid coloring agent dispersion is used in an amount of from 0.05 to 2 parts by weight based on said polycarbonate resin for optical members.
Claim 3
Dependent Claim
36 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said saturated fatty acid ester is an ester of a saturated monobasic carboxylic acid with a monohydric alcohol.
Claim 4
Dependent Claim
43 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 2, wherein said saturated fatty acid ester is selected from the group consisting of butyl laurate, butyl sterate, butyl behenate, stearyl stearate, behenyl behenate, and myricyl stearate.
Claim 5
Dependent Claim
37 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said saturated fatty acid ester is an ester of a saturated monobasic carboxylic acid with a saturated polyhydric alcohol.
Claim 6
Dependent Claim
40 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 4, wherein said saturated fatty acid ester is selected from the group consisting of ethylene glycol distearate, glycerol tristearate, trimethylolpropane tristearate, and pentaerythritol tetrastearate.
Claim 7
Dependent Claim
35 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said saturated fatty acid ester has a melting point of from -30° C. to +80 ° C.
Claim 8
Dependent Claim
44 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said liquid coloring agent dispersion is used in an amount of from 0.2 to 1 part by weight based on said polycarbonate resin for optical members.
Claim 9
Dependent Claim
40 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said coloring agent is used in a concentration of from 0.5% by weight to 10% by weight based on the dispersing agent.
Claim 10
Dependent Claim
53 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said coloring agent comprises a dye or pigment of a methane type, an anthraquinone type, a perylene type, a thioindigo type, a phthalocyanine type, a cumarine type, a bisbenzoxazylnaphthalene type or an oxazole stilbene type.
Claim 11
Dependent Claim
72 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 1, wherein said liquid coloring agent dispersion comprises a coloring agent comprising at least one of a dye and a pigment, and a dispersing agent comprising a silicone oil; and said liquid coloring agent dispersion is used in an amount of from 0.05 to 2 parts by weight based on said polycarbonate resin for optical members.
Claim 12
Dependent Claim
29 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 10, wherein said silicone oil is at least one of dimethylpolysiloxane and methylphenylpolysiloxane.
Claim 13
Dependent Claim
30 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 10, wherein said silicone oil has a viscosity of from 100 cp to 10,000.
Claim 14
Dependent Claim
44 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 10, wherein said liquid coloring agent dispersion is used in an amount of from 0.2 to 1 part by weight based on said polycarbonate resin for optical members.
Claim 15
Dependent Claim
40 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 10, wherein said coloring agent is used in a concentration of from 0.5% by weight to 10% by weight based on the dispersing agent.
Claim 16
Dependent Claim
53 words
A method of coloring a polycarbonate extruded or molded product for optical members according to claim 10, wherein said coloring agent comprises a dye or pigment of a methane type, an anthraquinone type, a perylene type, a thioindigo type, a phthalocyanine type, a cumarine type, a bisbenzoxazylnaphthalene type or an oxazole stilbene type.
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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |