US5157067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid colorant/additive concentrate for incorporation into plastics
Assignee: Vibrantz Corp
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Filing: 1991-04-16
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Granted: 1992-10-20
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Expires: 2011-04-16
Abstract
Abstract Liquid concentrates for incorporation into polymeric resins are described that are storage stable and resistant to settling or viscosity changes which comprise: (I) a vehicle comprising: (A) at least one organic rosin material; (B) at least one surfactant; and (II) at least one colrant or additive. The liquid concentrates of the present invention have a body or consistency that allow them to readily flow by gravity and are further characterized by a substantially uniform viscosity. The liquid color concentrates of the present invention also are compatible with a wide variety of plastics and facilitate a reduction in processing deficiencies such as screw-slippage, water carry-over and uneven flow to the pump inlet.
Inventors
- 👤 Neil A. Burditt
- 👤 Richard L. Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:45
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08L; C08L93/00; C08L93/04; C08J2493/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
160 words
A method for modifying a polymeric resin that comprises: (1) providing a polymeric resin; (2) providing a liquid concentrate comprising: (I) a substantially nonaqueous, rosin based vehicle comprising: (A) at least about 52 percent by weight of the vehicle of at least one non-polymeric organic rosin ester; (B) at least about 0.1 percent by weight of the total concentrate of at least one surfactant having a surfactant demand which is met by a concentration of no more than about 20 percent by weight of the total concentrate; and (II) up to about 85 percent by weight of the total concentrate of at least one colorant or additive; and (3) intimately blending a major amount of said polymeric resin with a minor property improving amount of said liquid concentrate; wherein said concentrate flows readily by gravity and is characterized by a viscosity at 25° C. under a shear stress of 12.5 thousand dynes/cm 2 of about 5 to about 1,500 poise.
Claim 2
Independent Claim
160 words
A method for modifying a polymeric resin that comprises: (1) providing a polymeric resin; (2) providing a liquid concentrate comprising: (I) a substantially nonaqueous, rosin based vehicle comprising: (A) at least about 52 percent by weight of the vehicle of at least one non-polymeric organic rosin ester; (B) at least about 0.1 percent by weight of the total concentrate of at least one surfactant having a surfactant demand which is met by a concentration of no more than about 20 percent by weight of the total concentrate; and (II) up to about 85 percent by weight of the total concentrate of at least one colorant or additive; and (3) intimately blending a major amount of said polymeric resin with a minor property improving amount of said liquid concentrate; wherein said concentrate flows readily by gravity and is characterized by a viscosity at 25° C. under a shear stress of 12.5 thousand dynes/cm 2 of about 5 to about 1,500 poise.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein component (A) comprises a lower alkyl ester of an abietic acid based rosin.
Claim 4
Dependent Claim
17 words
The method of claim 2 wherein said lower alkyl ester comprises the methyl ester of abietic acid.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein component (A) comprises a glycerol, pentaerythritol, triethylene glycol or phthalate ester of an abietic acid based rosin.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein component (B) comprises a poly(12-hydroxystearic acid) based surfactant.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein at least a portion of the acid end groups of said poly(12-hydroxystearic acid) are amidized.
Claim 8
Dependent Claim
14 words
The method of claim 6 wherein said acid end groups are amidized with N,N-dimethyl-1,3-propanediamine.
Claim 9
Dependent Claim
17 words
The method of claim 1 wherein said surfactant is an adduct of poly(12-hydroxystearic acid) and a polyethyleneimine.
Claim 10
Dependent Claim
15 words
The method of claim 1 wherein said vehicle further comprises a low viscosity organic diluent.
Claim 11
Dependent Claim
12 words
The method of claim 9 wherein said diluent comprises a mineral oil.
Claim 12
Dependent Claim
31 words
The method of claim 1 wherein said additive is selected from the group comprising colorants, U.V. stabilizers, antioxidants, fire retardants, and blowing agents, antistats, lubricants, impact modifiers, and mold release agents.
Claim 13
Dependent Claim
30 words
A method according to claim 1 wherein said non-polymeric rosin ester is liquid at 25° C. or has a softening point from about 25° C. up to about 80° C.
Claim 14
Dependent Claim
17 words
The method of claim 1 wherein said non-polymeric rosin ester is a lower alkyl ester of rosin.
Claim 15
Dependent Claim
16 words
A method according to claim 1 wherein said rosin based vehicle is substantially free of water.
Claim 16
Dependent Claim
25 words
A method according to claim 14 wherein said rosin based vehicle contains less than about 0.1 percent by weight of the total concentrate of water.
Claim 17
Dependent Claim
46 words
A method according to claim 1 wherein said liquid concentrate is prepared by a process that comprises: (1) blending said rosin (A) with said surfactant (B) to obtain vehicle (I); and (2) mixing said colorant or additive (II) with said vehicle (I) to obtain said concentrate.
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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) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |