US5582873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid scavenger stabilized halogen containing organic polymers and method for processing
Assignee: Individual
•
Filing: 1995-08-17
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Granted: 1996-12-10
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Expires: 2015-08-17
Abstract
Abstract The present invention relates to a method of making stabilized halogen containing organic polymer laminate comprising as one layer a halogen-containing organic polymer, an acid scavenger comprising a molecular sieve or zeolite; and a heat stabilizer and as the other layer, a similar composition devoid of a molecular sieve or zeolite.
Inventors
- 👤 Nirav Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:09
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
A method for processing a stabilized halogen containing organic polymer composition comprising: (a) formulating a first stabilized halogen containing organic polymer composition comprising: (i) a halogen containing organic polymer; (ii) an acid scavenger comprising a sodium zeolite; and (iii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers or any combination of the foregoing; (b) formulating a second stabilized halogen containing organic polymer composition comprising: (i) a halogen containing organic polymer; and (ii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers, antimony-tris-mercaptides, organic phosphates, epoxy compounds, polyols, dicarboxylic acids, aminocrotonates or any combination of the foregoing; and (c) processing the first and second stabilized compositions to form a multi-layered product wherein the first composition forms a core layer comprising from about 50 to about 99 weight percent of the product and the second composition forms a cap layer comprising from about 1 to about 50 weight percent of the product and wherein the first composition is processed at a higher temperature and with a greater output than the second composition.
Claim 2
Independent Claim
191 words
A method for processing a stabilized halogen containing organic polymer composition comprising: (a) formulating a first stabilized halogen containing organic polymer composition comprising: (i) a halogen containing organic polymer; (ii) an acid scavenger comprising a sodium zeolite; and (iii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers or any combination of the foregoing; (b) formulating a second stabilized halogen containing organic polymer composition comprising: (i) a halogen containing organic polymer; and (ii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers, antimony-tris-mercaptides, organic phosphates, epoxy compounds, polyols, dicarboxylic acids, aminocrotonates or any combination of the foregoing; and (c) processing the first and second stabilized compositions to form a multi-layered product wherein the first composition forms a core layer comprising from about 50 to about 99 weight percent of the product and the second composition forms a cap layer comprising from about 1 to about 50 weight percent of the product and wherein the first composition is processed at a higher temperature and with a greater output than the second composition.
Claim 3
Dependent Claim
39 words
A method as defined in claim 1 wherein the core layer comprises from about 70 to about 95 weight percent of the product and the cap layer comprises from about 5 to about 30 weight percent of the product.
Claim 4
Dependent Claim
13 words
A method as defined in claim 1 wherein the zeolite is sodium mordenite.
Claim 5
Dependent Claim
45 words
(Amended) A method as defined in claim 1 wherein the zeolite is a sodium zeolite with about 13 to 25% water content, a mean particle size of about 3 to about 4 microns and an average pore size of about 3 to about 7 angstroms.
Claim 6
Dependent Claim
34 words
A method as defined in claim 1 wherein the first composition and the second composition further comprise, costablizers, plasticizers, lubricants, smoke supressants, impact modifiers, UV stabilizers, fillers, pigments or any combination of the foregoing.
Claim 7
Dependent Claim
22 words
A method as defined in claim 1 wherein the first and second compositions are processed by coextruding the first and second compositions.
Claim 8
Dependent Claim
28 words
A method as defined in claim 6 wherein the first and second compositions are processed by coextruding the first and second compositions into a single feed block die.
Claim 9
Dependent Claim
19 words
A method as defined in claim 7 further comprising the step of forming the multi-layered product into a sheet.
Claim 10
Independent Claim
263 words
A method for processing a stabilized halogen containing organic polymer composition consisting essentially of: (a) formulating a first stabilized halogen containing organic polymer composition consisting essentially of: (i) a halogen containing organic polymer; (ii) an acid scavenger comprising a sodium zeolite with about 13 to 25% water content, a mean particle size of about 3 to about 4 microns and an average pore size of about 3 to about 7 angstroms; (iii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers or any combination of the foregoing; and (iv) costablizers, plasticizers, lubricants, smoke supressants, impact modifiers, UV stabilizers, fillers, pigments or any combination of the foregoing; (b) formulating a second stabilized halogen containing organic polymer composition consisting essentially of: (i) a halogen containing organic polymer; (ii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers, antimony-tris-mercaptides, organic phosphates, epoxy compounds, polyols, dicarboxylic acids, aminocrotonates or any combination of the foregoing; and (iii) costablizers, plasticizers, lubricants, smoke supressants, impact modifiers, UV stabilizers, fillers, pigments or any combination of the foregoing; and (c) coextruding the first and second stabilized compositions to form a multi-layered product wherein the first composition forms a core layer comprising from about 50 to about 99 weight percent of the product and the second composition forms a cap layer comprising from about 1 to about 50 weight percent of the product and wherein the first composition is processed at a higher temperature and with a greater output than the second composition.
Claim 11
Independent Claim
263 words
A method for processing a stabilized halogen containing organic polymer composition consisting essentially of: (a) formulating a first stabilized halogen containing organic polymer composition consisting essentially of: (i) a halogen containing organic polymer; (ii) an acid scavenger comprising a sodium zeolite with about 13 to 25% water content, a mean particle size of about 3 to about 4 microns and an average pore size of about 3 to about 7 angstroms; (iii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers or any combination of the foregoing; and (iv) costablizers, plasticizers, lubricants, smoke supressants, impact modifiers, UV stabilizers, fillers, pigments or any combination of the foregoing; (b) formulating a second stabilized halogen containing organic polymer composition consisting essentially of: (i) a halogen containing organic polymer; (ii) a heat stabilizer selected from the group consisting of mixed metal stabilizers, organotin stabilizers, lead stabilizers, metal free stabilizers, antimony-tris-mercaptides, organic phosphates, epoxy compounds, polyols, dicarboxylic acids, aminocrotonates or any combination of the foregoing; and (iii) costablizers, plasticizers, lubricants, smoke supressants, impact modifiers, UV stabilizers, fillers, pigments or any combination of the foregoing; and (c) coextruding the first and second stabilized compositions to form a multi-layered product wherein the first composition forms a core layer comprising from about 50 to about 99 weight percent of the product and the second composition forms a cap layer comprising from about 1 to about 50 weight percent of the product and wherein the first composition is processed at a higher temperature and with a greater output than the second composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |