Patent US6143829A successfully refreshed from Google Patents.
US6143829A
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Process of rheology modification of polymers
Assignee: Dow Chemical Co
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Filing: 1998-08-13
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Granted: 2000-11-07
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Expires: 2018-08-13
Abstract
Abstract The invention includes a process of reacting a poly(sulfonyl azide) with a polymer comprising steps (a) forming a first admixture, hereinafter referred to as a concentrate, of a first amount of a first polymer or in a liquid which does not require removal from the polymer, hereinafter diluent, and a poly(sulfonyl azide); (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer, hereinafter second polymer composition; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains. The diluent is preferably a non-volatile, non-polar compound such as mineral oil in which the poly(sulfonyl azide) is sufficiently miscible to disperse the poly(sulfonyl azide) in the second polymer.
Inventors
- 👤 David A. Babb
- 👤 Wendy D. Hoenig
- 👤 Che-I Kao
- 👤 Michael E. Rowland
- 👤 Clark H. Cummins
- 👤 Michael J. Mullins
- 👤 H. Craig Silvis
- 👤 Thoi H. Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:43
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08G; C08G81/00; C08G81/02; C08K; C08K5/00; C08K5/36; C08K5/43; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L2205/00; C08L2205/22; C08L23/06; C08L23/0838; C08L23/0846; C08L23/0853; C08L23/16; C08L2312/00; C08L2314/00; C08L2314/06; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352; Y10T428/1386; Y10T428/139; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
130 words
A process of reacting a coupling agent comprising a poly(sulfonyl azide) with a polymer to form a rheology modified polymer, the process comprising the steps: (a) forming a first admixture, hereinafter referred to as a concentrate, of a poly(sulfonyl azide) and a first amount of a first polymer or a liquid which does not require removal from the polymer, hereinafter diluent; (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer, hereinafter second polymer composition; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains wherein the rheology modified polymer has less than about 10 percent gel as measured by ASTM 02765-procedure A.
Claim 2
Dependent Claim
130 words
A process of reacting a coupling agent comprising a poly(sulfonyl azide) with a polymer to form a rheology modified polymer, the process comprising the steps: (a) forming a first admixture, hereinafter referred to as a concentrate, of a poly(sulfonyl azide) and a first amount of a first polymer or a liquid which does not require removal from the polymer, hereinafter diluent; (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer, hereinafter second polymer composition; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains wherein the rheology modified polymer has less than about 10 percent gel as measured by ASTM 02765-procedure A.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the diluent is a non-volatile, non-polar compound in which the poly(sulfonyl azide) is sufficiently miscible to disperse the poly(sulfonyl azide) in the second polymer.
Claim 4
Dependent Claim
42 words
The process of claim 1 wherein step (b) includes introducing a poly(sulfonyl azide) into a device containing the second polymer, wherein the poly(sulfonyl azide) is in liquid form, in a slurry or in an admixture of poly(sulfonyl azide) in a liquid diluent.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein the second polymer into which the poly(sulfonyl azide) is introduced is softened, molten or melted polymer.
Claim 6
Dependent Claim
19 words
The process of claim 3 wherein the polymer into which the poly(sulfonyl azide) is introduced is in particulate form.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein step (b) takes place in melt processing equipment.
Claim 8
Dependent Claim
55 words
The process of claim 1 wherein the process includes forming a first admixture of a first amount of a first polymer and a poly(sulfonyl azide) at a temperature less than the decomposition temperature of the poly(sulfonyl azide), and then forming a second admixture of the first admixture with a second amount of the first polymer.
Claim 9
Dependent Claim
17 words
The process of claim 7 wherein the first polymer and poly(sulfonyl azide) are admixed by melt blending.
Claim 10
Dependent Claim
40 words
The process of claim 1 wherein a first polymer is used in step a(a) and some coupling occurs during step (a), but some of the poly(sulfonyl azide) remains unreacted until the resulting concentrate is blended into the second polymer composition.
Claim 11
Dependent Claim
31 words
The process of claim 1 wherein the diluent is a liquid at room temperature or low melting solid at room temperature, that is has a melting point below about 50° C.
Claim 12
Dependent Claim
34 words
The process of claim 1 wherein the first polymer is low melting, that is has a melting point below about 110° C. or a melt index, I2, of at least about 0.5 g/10 min.
Claim 13
Dependent Claim
65 words
The process of claim 11 wherein the first polymer is selected from ethylene alpha olefin copolymers, where the alpha olefins are of 3 to 20 carbon atoms, have a density range of at least about 0.855 g/cc to about 0.955 g/cc or have a melt index, I2, of at least about 0.5 g/10 min; ethylene acrylic acid; ethylene vinyl acetate, ethylene/styrene interpolymers or combinations thereof.
Claim 14
Dependent Claim
19 words
The process of claim 12 wherein the first polymer has a melting temperature of less than about 150° C.
Claim 15
Dependent Claim
14 words
The process of claim 1 wherein the concentrate is dry blended with pelleted polymer.
Claim 16
Dependent Claim
18 words
The process of claim 1 wherein the concentrate is injected as molten concentrate into molten second polymer composition.
Claim 17
Dependent Claim
19 words
The process of claim 1 wherein the concentrate is formed on the surface of a polymer to be coupled.
Claim 18
Dependent Claim
25 words
The process of claim 16 wherein the diluent is coated on a comminuted second polymer composition by stirring or tumbling comminuted polymer with a diluent.
Claim 19
Dependent Claim
16 words
The process of claim 1 wherein steps (a) and (b) take place in the same vessel.
Claim 20
Dependent Claim
21 words
The process of claim 1 wherein steps (a) and (b) take place in the post-reactor area of a polymer processing plant.
Claim 21
Dependent Claim
16 words
The process of claim 1 wherein the first and second polymers are of the same composition.
Claim 22
Dependent Claim
16 words
The process of claim 1 wherein the first and second polymers are of the different compositions.
Claim 23
Dependent Claim
27 words
The process of claim 1 wherein the poly(sulfonyl azide) is present in an amount less than about 0.5 weight percent based on the total weight total polymers.
Claim 24
Dependent Claim
27 words
The process of claim 22 wherein the poly(sulfonyl azide) is present in an amount greater than about 0.01 weight percent based on the total weight of polymers.
Claim 25
Dependent Claim
136 words
A composition which is obtainable from a process of reacting a coupling agent comprising a poly(sulfonyl azide) with a polymer to form a rheology modified polymer, the process comprising the steps: (a) forming a first admixture, hereinafter referred to as a concentrate, of a poly(sulfonyl azide) and a first amount of a first polymer or a liquid which does not require removal from the polymer, hereinafter diluent; (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer, hereinafter second polymer composition; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains wherein the rheology modified polymer has less than about 10 percent gel as measured by ASTM 02765-procedure A.
Claim 26
Dependent Claim
136 words
A composition which is obtainable from a process of reacting a coupling agent comprising a poly(sulfonyl azide) with a polymer to form a rheology modified polymer, the process comprising the steps: (a) forming a first admixture, hereinafter referred to as a concentrate, of a poly(sulfonyl azide) and a first amount of a first polymer or a liquid which does not require removal from the polymer, hereinafter diluent; (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer, hereinafter second polymer composition; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains wherein the rheology modified polymer has less than about 10 percent gel as measured by ASTM 02765-procedure A.
Claim 27
Dependent Claim
22 words
The composition of claim 24 having no more than about 5 weight percent gels as measured by xylene insolubility of the gels.
Claim 28
Dependent Claim
21 words
A process of preparing shaped polymer articles by forming a composition of claim 24 in a melted state into an article.
Claim 29
Dependent Claim
17 words
The process of claim 26 which comprises thermoforming, injection molding, extrusion, casting, blow molding, foaming or blowing.
Claim 30
Dependent Claim
8 words
An article comprising a composition of claim 24.
Claim 31
Dependent Claim
29 words
A composition which is a blend of any composition of claims 24 with at least one polymer of a composition different from that of the first or second 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) | 2003-11-07 | 2004-05-08 | 2004-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-07 | 2008-05-08 | 2008-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-07 | 2012-05-08 | 2012-11-07 | $7700.00 | Window Closed / Lapsed |