US3875104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coagulation of oil-extended emulsions
Assignee: Wyeth Holdings LLC
•
Filing: 1973-12-17
•
Granted: 1975-04-01
•
Expires: 1993-12-17
Abstract
Abstract Anionic polymers are added to oil-extended, rubber latices in conjunction with cationic polymers and acids in order to coagulate the latex and recover the oil-extended rubber.
Inventors
- 👤 Frederick H Siegele
- 👤 Robert Rabinowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/14; C08C1/15
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
30 words
A METHOD FOR COAGULATING AN OIL EXTENDED, RUBBER LATEX OF 3-75% STYRENE, 25-97% BUTADIENE AND UP TO 50% ACRYLONITRILE, THE TOTAL BEING 100%, SAID PERCENTAGES BEING BY WEIGHT WHICH COMPRISES
Claim 2
Independent Claim
30 words
A METHOD FOR COAGULATING AN OIL EXTENDED, RUBBER LATEX OF 3-75% STYRENE, 25-97% BUTADIENE AND UP TO 50% ACRYLONITRILE, THE TOTAL BEING 100%, SAID PERCENTAGES BEING BY WEIGHT WHICH COMPRISES
Claim 3
Dependent Claim
29 words
ADDING TO SAID LATEX AN ANIONIC POLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 500 TO 15,000,000 AND CONTAINING FROM ABOUT 5 TO 100% BY WEIGHT OF CARBOXYL GROUPS,
Claim 4
Dependent Claim
29 words
ADDING TO SAID LATEX AN ANIONIC POLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 500 TO 15,000,000 AND CONTAINING FROM ABOUT 5 TO 100% BY WEIGHT OF CARBOXYL GROUPS,
Claim 5
Dependent Claim
10 words
ADDING TO THE PRODUCT OF STEP (1), A CATIONIC POLYMER,
Claim 6
Dependent Claim
10 words
ADDING TO THE PRODUCT OF STEP (1), A CATIONIC POLYMER,
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein said cationic polymer is a melamine-formaldehyde resin acid colloid.
Claim 8
Dependent Claim
10 words
adding to the product of step (1), a cationic polymer,
Claim 9
Dependent Claim
10 words
adding to the product of step (1), a cationic polymer,
Claim 10
Dependent Claim
10 words
adding to the product of step (2), an acid and
Claim 11
Dependent Claim
10 words
adding to the product of step (2), an acid and
Claim 12
Dependent Claim
16 words
A method according to claim 1 wherein said anionic polymer is a polymer of acrylic acid.
Claim 13
Dependent Claim
10 words
ADDING TO THE PRODUCT OF STEP (2), AN ACID AND
Claim 14
Dependent Claim
10 words
ADDING TO THE PRODUCT OF STEP (2), AN ACID AND
Claim 15
Dependent Claim
6 words
RECOVERING THE RESULTANT COAGULATED OIL-EXTENDED RUBBER.
Claim 16
Dependent Claim
6 words
RECOVERING THE RESULTANT COAGULATED OIL-EXTENDED RUBBER.
Claim 17
Dependent Claim
19 words
A method according to claim 1 wherein said anionic polymer is a polymer of a salt of acrylic acid.
Claim 18
Dependent Claim
6 words
recovering the resultant coagulated oil-extended rubber.
Claim 19
Dependent Claim
6 words
recovering the resultant coagulated oil-extended rubber.
Claim 20
Dependent Claim
16 words
A method according to claim 1 wherein said cationic polymer is a dialkylamine-difunctional epoxy reaction product.
Claim 21
Dependent Claim
16 words
A method according to claim 1 wherein said cationic polymer is a dialkylamine-polyamine-difunctional epoxy reaction product.
References Cited (Backward Citations)
US3761455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |