US4418183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of high concentrations of emulsion polymers
Assignee: Pitney Bowes Inc
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Filing: 1981-11-12
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Granted: 1983-11-29
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Expires: 2001-11-12
Abstract
Abstract A process for the preparation of emulsion polymers having a solid content of about 65% to about 80% is disclosed. The process comprises the step of adding a monomeric mixture to a reaction system maintained at a temperature of from about 60° C. to about 90° C., the monomer addition not exceeding an hourly rate of about one-fourth of the total monomer to be added, the mixture comprising monomers having a particle size of from about 10-100 microns, the system having therein an emulsifier and initiator at the time of the monomeric addition.
Inventors
- 👤 Albert C. Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/02; B01J19/00; B01J19/18; B01J4/001; C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00099
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
A process for the preparation of emulsion polymers having a solid content of about 65% to about 80% which comprises adding a monomeric mixture to a reaction system maintained at a temperature of from about 60° C. to about 90° C., said monomer addition not exceeding an hourly rate of about one-fourth of the total monomer to be added, said mixture comprising monomers having a particle size of from about 10-100 microns, said system having therein an emulsifier and initiator at the time of said monomeric addition.
Claim 2
Dependent Claim
87 words
A process for the preparation of emulsion polymers having a solid content of about 65% to about 80% which comprises adding a monomeric mixture to a reaction system maintained at a temperature of from about 60° C. to about 90° C., said monomer addition not exceeding an hourly rate of about one-fourth of the total monomer to be added, said mixture comprising monomers having a particle size of from about 10-100 microns, said system having therein an emulsifier and initiator at the time of said monomeric addition.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein an emulsifier is added to said system in an amount of from about 6% to about 10% based on the total monomer in the system.
Claim 4
Dependent Claim
50 words
The process of claim 1 wherein said monomer has the general formula: ##STR5## wherein R 1 and R 2 =H, R 3 =H, CH 3 and mixtures thereof, R 4 =COOR, CN, C 6 H 5 , CH 3 --C 6 N 5 , COOH 2 OH and mixtures thereof.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said monomer comprises styrene and an acrylate.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said monomer comprises n-butyl methacrylate and styrene.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein the system is maintained at temperature of from about 65° C. to about 85° C.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein a reducing agent is used in the system.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein an initiator is used in the system.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein a chemical modifier is used in the system.
Claim 11
Dependent Claim
28 words
The process of claim 1 wherein an emulsifier and an initiator are used in the system, said emulsifier and initiator are pre-mixed prior to introduction into said system.
Claim 12
Dependent Claim
25 words
The process of claim 1 wherein said monomeric addition is conducted both prior to and subsequent to the introduction of an emulsifier and an initiator.
Claim 13
Dependent Claim
54 words
The process of claim 1 wherein an emulsifier and an initiator are used in said system, said emulsifier and initiator are pre-mixed prior to introduction into said system, and wherein said monomeric addition into said system is conducted both prior to and subsequent to the initial introduction into said system of said emulsifier-initiator mixture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |