Patent US3843616A successfully refreshed from Google Patents.
US3843616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride-ethylene copolymers and the preparation thereof
Assignee: Occidental Chemical Corp
•
Filing: 1970-02-25
•
Granted: 1974-10-22
•
Expires: 1990-02-25
Abstract
Abstract A method for producing porous vinyl chloride-ethylene copolymers containing at least 98.1 per cent by weight of vinyl chloride and 0.3 to 1.9 per cent by weight of ethylene which comprises continuous one-stage suspension polymerization of vinyl chloride and ethylene; and the vinyl chloride-ethylene copolymers produced thereby.
Inventors
- 👤 D Richardson
- 👤 G Harkreader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:22
CPC Classifications
C; C08; C08J; C08J9/00; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
135 words
A POROUS VINCYL CHLORIDE-ETHULENE COPOLYMER RESIN CONTAINING AT LEAST 98.3 PERCENT OF VINCYL CHLORIDE AND 0.3 TO 1.7 PERCENT BY WEIGHT OF ETHYLENE POLYMEREIZED THEREIN CHARACTERIZED BY HAVING A SORPTION VALUE GREATER THAN ABOUT 50 PARTS OF DICOSITY PHTHALATE PLASTICIZER PER HUNDRED PARTS OF RESI WHEN MEASURED IN ACCORDANCE WITH ASTM D-1755-60T; AN INHERENT VISCOSITY OF ABOUT 0.5 TO 1.7, WHEN MEASURED AS A 0.2 GRAM SAMPLE IN 100 ML. OF CYLOHEXANONE AT 25*C., A DRYBLEND TIME OF ABOUT 2.0 TO 15.0 MINUTES AS MEASURED WITH A BRABENDER PLASTICORDER AND A BULK DENSITY OF ABOUT 20 TO 40 LBS./CUBIC FOOT, SAID COPOLYMER RESIN HAVING BEEN PREPARED BY A POLYMERIZATION PROCESS WHICH COMPRISES: A. POLYMERIZATION PROCESS WHICH COMPRISES: CHLORIDE AND GASEOUS ETHYLENE MONOMERS IN AN AQUEOUS SUSPENSION CONTAIN9NG PER HUNDRED PARTS BY WEIGHT OF VINCYL CHLORIDE
Claim 2
Dependent Claim
135 words
A POROUS VINCYL CHLORIDE-ETHULENE COPOLYMER RESIN CONTAINING AT LEAST 98.3 PERCENT OF VINCYL CHLORIDE AND 0.3 TO 1.7 PERCENT BY WEIGHT OF ETHYLENE POLYMEREIZED THEREIN CHARACTERIZED BY HAVING A SORPTION VALUE GREATER THAN ABOUT 50 PARTS OF DICOSITY PHTHALATE PLASTICIZER PER HUNDRED PARTS OF RESI WHEN MEASURED IN ACCORDANCE WITH ASTM D-1755-60T; AN INHERENT VISCOSITY OF ABOUT 0.5 TO 1.7, WHEN MEASURED AS A 0.2 GRAM SAMPLE IN 100 ML. OF CYLOHEXANONE AT 25*C., A DRYBLEND TIME OF ABOUT 2.0 TO 15.0 MINUTES AS MEASURED WITH A BRABENDER PLASTICORDER AND A BULK DENSITY OF ABOUT 20 TO 40 LBS./CUBIC FOOT, SAID COPOLYMER RESIN HAVING BEEN PREPARED BY A POLYMERIZATION PROCESS WHICH COMPRISES: A. POLYMERIZATION PROCESS WHICH COMPRISES: CHLORIDE AND GASEOUS ETHYLENE MONOMERS IN AN AQUEOUS SUSPENSION CONTAIN9NG PER HUNDRED PARTS BY WEIGHT OF VINCYL CHLORIDE
Claim 3
Dependent Claim
10 words
FROM ABOUT 0.05 TO 1.0 PARTS OF A PROTECTIVE COLLOID,
Claim 4
Dependent Claim
10 words
FROM ABOUT 0.05 TO 1.0 PARTS OF A PROTECTIVE COLLOID,
Claim 5
Dependent Claim
13 words
FROM ABOUT 0.02 TO 1.0 PARTS OF A FREE RADICAL VINVYL POLYMERIZATION INITITATOR,
Claim 6
Dependent Claim
13 words
FROM ABOUT 0.02 TO 1.0 PARTS OF A FREE RADICAL VINVYL POLYMERIZATION INITITATOR,
Claim 7
Dependent Claim
13 words
from about 0.02 to 1.0 parts of a free radical vinyl polymerization initiator,
Claim 8
Dependent Claim
13 words
from about 0.02 to 1.0 parts of a free radical vinyl polymerization initiator,
Claim 9
Dependent Claim
32 words
A porous vinyl chloride-ethylene copolymer resin as defined in claim 1, containing at least about 98.5 percent by weight of vinyl chloride and 0.3 to about 1.5 percent of ethylene polymerized therein.
Claim 10
Dependent Claim
20 words
A porous vinyl chloride-ethylene copolymer resin as defined in claim 1 having a median particle size of about 160-190 microns.
Claim 11
Dependent Claim
8 words
from about 150 to 400 parts of water,
Claim 12
Dependent Claim
8 words
from about 150 to 400 parts of water,
Claim 13
Dependent Claim
8 words
FROM ABOUT 150 TO 400 PARTS OF WATER,
Claim 14
Dependent Claim
8 words
FROM ABOUT 150 TO 400 PARTS OF WATER,
Claim 15
Dependent Claim
37 words
SUFFICIENT ETHYLENE TO AFFORD AN AUTOGENOUS PRESSURE OF ABOUT 100 T0 400 PSIG. AT TEMPERATURE OF ABOUT 35* TO 80*C. FOR AT LEAST 4 HOURS, AND B. RECOVERING THE VINCYL CHLORIDE ETHYLENE COPOLYMER FROM THE SUSPENSION SYSTEM.
Claim 16
Dependent Claim
37 words
SUFFICIENT ETHYLENE TO AFFORD AN AUTOGENOUS PRESSURE OF ABOUT 100 T0 400 PSIG. AT TEMPERATURE OF ABOUT 35* TO 80*C. FOR AT LEAST 4 HOURS, AND B. RECOVERING THE VINCYL CHLORIDE ETHYLENE COPOLYMER FROM THE SUSPENSION SYSTEM.
Claim 17
Dependent Claim
37 words
sufficient ethylene to afford an autogenous pressure of about 100 to 400 psig. at temperature of about 35* to 80*C. for at least 4 hours, and b. recovering the vinyl chloride ethylene copolymer from the suspension system.
Claim 18
Dependent Claim
37 words
sufficient ethylene to afford an autogenous pressure of about 100 to 400 psig. at temperature of about 35* to 80*C. for at least 4 hours, and b. recovering the vinyl chloride ethylene copolymer from the suspension system.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |