Patent US5053444A successfully refreshed from Google Patents.
US5053444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer additive concentrate
Assignee: Croda International PLC
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Filing: 1989-06-05
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Granted: 1991-10-01
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Expires: 2009-06-05
Abstract
Abstract A polymer concentrate contains 15-80% by weight of a liquid, pasty or waxy additive, 5-50% by weight of a particulate solid and at least 5% by weight of a polymer. The particulate solid is finely divided and typically has a particle size in the micrometer range. The concentrate is prepared by adding the additive to the particulate solid while mixing using a solids mixing device, adding the polymer while continuing to mix, preferably at the same speed, subjecting the mixture to an elevated temperature to melt the polymer, cooling and grinding the cooled mixture.
Inventors
- 👤 Jean-Paul Trotoir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:28
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
112 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low-melting solid, a lubricating solid and combinations thereof and wherein the additive is an anti-fog agent, a clarifying agent, an antioxidant, a U.V. stabilizer, an infra-red absorber, a biocide, an antistatic agent, a plasticizer or a flame retardant; (B) 5 to 20% by weight of a particulate solid which is an inorganic solid which remains solid at temperatures in excess of those used to process the polymer component of the polymer concentrate; and (C) at least 5% weight of a thermoplastic polymer.
Claim 2
Dependent Claim
112 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low-melting solid, a lubricating solid and combinations thereof and wherein the additive is an anti-fog agent, a clarifying agent, an antioxidant, a U.V. stabilizer, an infra-red absorber, a biocide, an antistatic agent, a plasticizer or a flame retardant; (B) 5 to 20% by weight of a particulate solid which is an inorganic solid which remains solid at temperatures in excess of those used to process the polymer component of the polymer concentrate; and (C) at least 5% weight of a thermoplastic polymer.
Claim 3
Dependent Claim
21 words
The concentrate of claim 1 which contains at least 10%, and not more than 20%, by weight of the particulate solid.
Claim 4
Dependent Claim
11 words
The concentrate of claim 1 wherein the particulate solid is silica.
Claim 5
Dependent Claim
19 words
The concentrate of claim 1 which contains (A) 50 to 70% by weight of the at least one additive.
Claim 6
Dependent Claim
26 words
The concentrate of claim 1 wherein the thermoplastic polymer is polystyrene, a styrene-acrylonitrile copolymer, an acrylonitrile-styrene-butadiene copolymer, polymethylmethacrylate, a vinyl chloride polymer or a propylene polymer.
Claim 7
Dependent Claim
21 words
The concentrate of claim 1 wherein the thermoplastic polymer is an ethylene copolymer, a propylene copolymer or a vinyl chloride copolymer.
Claim 8
Dependent Claim
19 words
The concentrate of claim 1 wherein the particulate solid is calcium carbonate, a silicate, a metal oxide or silica.
Claim 9
Dependent Claim
20 words
The concentrate of claim 1 wherein the particulate solid is calcium carbonate, a silicate, magnesium oxide, aluminum oxide or silica.
Claim 10
Dependent Claim
15 words
The concentrate of claim 1 wherein the thermoplastic polymer is an ethylene or propylene polymer.
Claim 11
Dependent Claim
16 words
The concentrate of claim 1 which contains not more than 40% by weight of the polymer.
Claim 12
Dependent Claim
31 words
The concentrate of claim 7 wherein the particulate solid is finely divided and at least 80% by weight of the particles have a particle size of not more than 10 micrometers.
Claim 13
Dependent Claim
59 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low-melting solid, a lubricating solid and combinations thereof; (B) 5 to 20% by weight of a particulate solid; and (C) at least 5% by weight of a thermoplastic polymer.
Claim 14
Dependent Claim
59 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low-melting solid, a lubricating solid and combinations thereof; (B) 5 to 20% by weight of a particulate solid; and (C) at least 5% by weight of a thermoplastic polymer.
Claim 15
Dependent Claim
30 words
The concentrate of claim 12 wherein (B) is an inorganic solid which remains solid at temperatures in excess of those used to process the polymer component of the polymer concentrate.
Claim 16
Dependent Claim
101 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low melting solid, a lubricating solid and combinations thereof, and wherein the additive is a polyalkylene glycol, an ethoxylated fatty acid, an ethoxylated amine, an ester of a fatty acid or aromatic acid, a chlorinated paraffin, a U.V. stabilizer, an antioxidant, a plasticizer, a flame retardant or an infra-red absorber; (B) 5 to 20% by weight of a particulate solid; and (C) at least 5% by weight of a thermoplastic polymer.
Claim 17
Dependent Claim
101 words
A polymer concentrate which contains (A) 40 to 80% by weight of at least one additive which is selected from the group consisting of a liquid, a paste, a waxy low melting solid, a lubricating solid and combinations thereof, and wherein the additive is a polyalkylene glycol, an ethoxylated fatty acid, an ethoxylated amine, an ester of a fatty acid or aromatic acid, a chlorinated paraffin, a U.V. stabilizer, an antioxidant, a plasticizer, a flame retardant or an infra-red absorber; (B) 5 to 20% by weight of a particulate solid; and (C) at least 5% by weight of a thermoplastic polymer.
Claim 18
Dependent Claim
19 words
The concentrate of claim 14 which contains (A) 50 to 70% by weight of the at least one additive.
Claim 19
Dependent Claim
22 words
The concentrate of claim 14 which contains (C) at least 10%, and not more than 40% by weight of the thermoplastic polymer.
Claim 20
Dependent Claim
17 words
The concentrate of claim 14 which contains (B) at least 10% by weight of the particulate solid.
Claim 21
Dependent Claim
30 words
The concentrate of claim 14 wherein (C) the thermoplastic polymer is polystyrene, a styrene-acrylonitrile copolymer, an acrylonitrile-butadiene-styrene copolymer, polymethylmethacrylate, an ethylene polymer, a vinyl chloride polymer, or a propylene polymer.
Claim 22
Dependent Claim
20 words
The concentrate of claim 14 wherein (B) the particulate solid is calcium carbonate, a silicate, a metal oxide or silica.
Claim 23
Dependent Claim
32 words
The concentrate of claim 19 wherein (B) the particulate solid is finely divided and at least 80% by weight of the particles have a particle size of note more than 10 micrometers.
Claim 24
Dependent Claim
12 words
The concentrate of claim 19 wherein (B) the particulate solid is silica.
Claim 25
Dependent Claim
112 words
A polymer concentrate which contains (A) 50 to 80% by weight of at least one additive which is selected rom the group consisting of a liquid, a paste, a waxy low melting solid, a lubricating solid, and combinations thereof and wherein the additive is a polyalkylene glycol, an ethoxylated fatty acid, an ethoxylated amine, an ester of a fatty acid or aromatic acid, a chlorinated paraffin, a U.V. stabilizer, an antioxidant, a plasticizer, a flame retardant or an infra-red absorber; (B) 5 to 50% by weight of a particulate solid which is calcium carbonate, a silicate, magnesium oxide, aluminum oxide or silica, and (C) at least 5% by weight of a polymer.
Claim 26
Dependent Claim
112 words
A polymer concentrate which contains (A) 50 to 80% by weight of at least one additive which is selected rom the group consisting of a liquid, a paste, a waxy low melting solid, a lubricating solid, and combinations thereof and wherein the additive is a polyalkylene glycol, an ethoxylated fatty acid, an ethoxylated amine, an ester of a fatty acid or aromatic acid, a chlorinated paraffin, a U.V. stabilizer, an antioxidant, a plasticizer, a flame retardant or an infra-red absorber; (B) 5 to 50% by weight of a particulate solid which is calcium carbonate, a silicate, magnesium oxide, aluminum oxide or silica, and (C) at least 5% by weight of a polymer.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |