US4822856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polymeric blend stock
Assignee: Dow Chemical Co
•
Filing: 1987-02-18
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Granted: 1989-04-18
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Expires: 2007-02-18
Abstract
Abstract A process for preparing a polymeric blend stock comprising fluidizing a first particulated polymer, contacting the particulated polymer with droplets of a latex of a second polymer or polymer mixture, retaining the resulting product in a fluid state under conditions sufficient to dry the latex, and recovering the resulting dried polymeric blend stock.
Inventors
- 👤 Eugene R. Moore
- 👤 Wen H. Tong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:07
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A process for preparing a polymeric blend stock comprising fluidizing a first particulated polymer or polymer mixture by use of a heated gaseous fluidizing medium contacting the fluidized particulated polymer or polymer mixture with droplets of a latex of a second polymer or polymer mixture, retaining the resulting product in a fluidized state under conditions sufficient to dry the latex, and recovering the resulting dried polymeric blend stock.
Claim 2
Dependent Claim
68 words
A process for preparing a polymeric blend stock comprising fluidizing a first particulated polymer or polymer mixture by use of a heated gaseous fluidizing medium contacting the fluidized particulated polymer or polymer mixture with droplets of a latex of a second polymer or polymer mixture, retaining the resulting product in a fluidized state under conditions sufficient to dry the latex, and recovering the resulting dried polymeric blend stock.
Claim 3
Dependent Claim
40 words
A process according to claim 1, wherein the particulated polymer comprises a homopolymer of styrene or a copolymer thereof with acrylonitrile, methylmethacrylate, or maleic anhydride, a homopolymer of vinylchloride or a copolymer thereof with a C 1-4 acrylate or methacrylate.
Claim 4
Dependent Claim
12 words
A process according to claim 1, wherein the fluidizing medium comprises air.
Claim 5
Dependent Claim
22 words
A process according to claim 1, wherein the fluidizing medium is heated to a temperature from about 60° to about 110° C.
Claim 6
Dependent Claim
22 words
A process according to claim 4, wherein the fluidizing medium is heated to a temperature from about 80° to about 100° C.
Claim 7
Dependent Claim
16 words
A process according to claim 1, wherein the latex comprises grafted particles of a rubbery polymer.
Claim 8
Dependent Claim
23 words
A process according to claim 1, wherein the latex comprises polymer particles having a particle size from about 0.08 to about 3.0 microns.
Claim 9
Dependent Claim
24 words
A process according to claim 1, wherein the latex is formed into droplets by atomization through an atomizing nozzle, or a rotating disk-type atomizer.
Claim 10
Dependent Claim
9 words
A polymeric blend stock prepared according to claim 1.
References Cited (Backward Citations)
US3864432A
Cited
US3953389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |