Patent US4497920A successfully refreshed from Google Patents.
US4497920A
Expired / Lapsed
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System for bonding additives to resin particles and resulting composition
Assignee: Dow Chemical Co
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Filing: 1982-12-17
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Granted: 1985-02-05
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Expires: 2002-12-17
Abstract
Abstract An additive concentrate composition is composed of a carbonate polymer, a powdered additive such as a pigment, and a mixture of a film-forming adherent such as an esterified polysaccharide and a liquid diluent such as an epoxidized vegetable oil or a bis(phosphorinane), in amounts preferably less than or equal to about 1 percent based on the weight of carbonate polymer and the additive. Alternatively, the epoxidized vegetable oil may optionally be used as a bonding agent. The bonding agents have desirable properties that do not adversely affect the physical properties of the carbonate polymer in end use, and are thermally stable and color-stable.
Inventors
- 👤 Lowell S. Thomas
- 👤 William P. Paige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
A carbonate polymer composition in the form of an additive concentrate comprising a carbonate polymer carrier resin having dispersed therein a powdered or crystalline additive and a functionally effective amount of a color and heat stable bonding agent comprising a mixture of (a) an epoxidized vegetable oil or a bis(dioxaphosphorinane), and (b) an esterified polysaccharide.
Claim 2
Dependent Claim
55 words
A carbonate polymer composition in the form of an additive concentrate comprising a carbonate polymer carrier resin having dispersed therein a powdered or crystalline additive and a functionally effective amount of a color and heat stable bonding agent comprising a mixture of (a) an epoxidized vegetable oil or a bis(dioxaphosphorinane), and (b) an esterified polysaccharide.
Claim 3
Dependent Claim
14 words
A composition of claim 1 wherein said powdered or crystalline additive is a pigment.
Claim 4
Dependent Claim
15 words
A composition of claim 1 wherein said epoxidized vegetable oil is an epoxidized soybean oil.
Claim 5
Dependent Claim
10 words
A composition of claim 1 wherein said bis(phosphorinane) is 2,2'[(1-methylethylidene)-bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5-dimethyl-1,3,2-dioxaphosphorinane).
Claim 6
Dependent Claim
10 words
A composition of claim 1 wherein said bis(phosphorinane) is 2,2'-(1,2-ethanediylbis-(oxy-2,1-ethanediyloxy))bis(5,5-dimethyl-1,3,2-dioxaphosphorinane).
Claim 7
Dependent Claim
26 words
A composition of claim 1 wherein the amount of said bonding agent contained in said composition is less than or about equal to 1 weight percent.
Claim 8
Dependent Claim
25 words
A composition of claim 1 wherein the amount of said powdered additive contained in said composition is between about 1 and about 60 weight percent.
Claim 9
Dependent Claim
13 words
A composition of claim 1 wherein said esterified polysaccharide is sucrose hexaacetate diisobutyrate.
Claim 10
Dependent Claim
56 words
A process for preparing an additive concentrate which comprises dry blending a powdered or crystalline additive and a dry particulate of carbonate polymer in the presence of a functionally effective amount of a color and heat stable bonding agent comprising a mixture of (a) an epoxidized vegetable oil or a bis(dioxaphosphorinane), and (b) an esterified polysaccharide.
Claim 11
Dependent Claim
56 words
A process for preparing an additive concentrate which comprises dry blending a powdered or crystalline additive and a dry particulate of carbonate polymer in the presence of a functionally effective amount of a color and heat stable bonding agent comprising a mixture of (a) an epoxidized vegetable oil or a bis(dioxaphosphorinane), and (b) an esterified polysaccharide.
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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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |