US3879359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vinylidene chloride polymer content coating resins and method of preparation
Assignee: Dow Chemical Co
•
Filing: 1973-10-29
•
Granted: 1975-04-22
•
Expires: 1993-10-29
Abstract
Abstract Aqueous emulsion process for preparing interpolymers of about 88 to 93 mole % vinylidine chloride and about 12 to 7 mole % of a mixture of acrylonitrile and methyl methacrylate in a ratio of about 1:1 to 4:1 wherein acrylonitrile is used in sufficient amount to satisfy its partition coefficient relative to water and subsequently added monomer phases so that said interpolymers can form substantially haze free solutions.
Inventors
- 👤 Paul E Hinkamp
- 👤 Duane F Foye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
75 words
A PROCESS FOR PREPARING, IN AQUEOUS EMULSION, INTERPOLYMERS OF FROM ABOUT 88 TO 93 MOLE PERCENT VINYLIDENE CHLORIDE AND FROM ABOUT 12 TO 7 MOLE PERCENT OF A MIXTURE OF ACRYLONITRILE AND METHYL METHACRYLATE SAID MIXTURE CONSISTING OF A MOLAR RATIO OF ACRYLONITRILE TO METHYL METHACRYLATE OF FROM ABOUT 1:1 TO 4:1 SUCH INTERPOLYMERS HAVING AN EXCEPTIONALLY NARROW COMPOSITIONAL RANGE AND HAVING ENHANCED SOLUBILITY IN ORGANIC SOLVENTS, SAID PROCESS CONSISTING OF THE SEQUENTIAL STEPS OF
Claim 2
Dependent Claim
75 words
A PROCESS FOR PREPARING, IN AQUEOUS EMULSION, INTERPOLYMERS OF FROM ABOUT 88 TO 93 MOLE PERCENT VINYLIDENE CHLORIDE AND FROM ABOUT 12 TO 7 MOLE PERCENT OF A MIXTURE OF ACRYLONITRILE AND METHYL METHACRYLATE SAID MIXTURE CONSISTING OF A MOLAR RATIO OF ACRYLONITRILE TO METHYL METHACRYLATE OF FROM ABOUT 1:1 TO 4:1 SUCH INTERPOLYMERS HAVING AN EXCEPTIONALLY NARROW COMPOSITIONAL RANGE AND HAVING ENHANCED SOLUBILITY IN ORGANIC SOLVENTS, SAID PROCESS CONSISTING OF THE SEQUENTIAL STEPS OF
Claim 3
Dependent Claim
50 words
DISSOLVING ACRYLONITRILE IN AN ACQUEOUS EMULSION COMPOSED ESSENTIALLY OF WATER, EMULSIFIER AND POLYMERIZATION CATALYST, SAID ACRYLONITRILE BEING IN AN AMOUNT SUFFICIENT TO SATISFY THE PARTITION COEFFICIENT OF ACRYLONITRILE BETWEEN THE WATER AND SUBSEQUENTLY ADDED MONOMER PHASES CONTAINING ACRYLONITRILE TO PREVENT THE EXTRACTION OF ACRYLONITRILE FROM SAID SUBSEQUENTLY ADDED MONOMER PHASES,
Claim 4
Dependent Claim
50 words
DISSOLVING ACRYLONITRILE IN AN ACQUEOUS EMULSION COMPOSED ESSENTIALLY OF WATER, EMULSIFIER AND POLYMERIZATION CATALYST, SAID ACRYLONITRILE BEING IN AN AMOUNT SUFFICIENT TO SATISFY THE PARTITION COEFFICIENT OF ACRYLONITRILE BETWEEN THE WATER AND SUBSEQUENTLY ADDED MONOMER PHASES CONTAINING ACRYLONITRILE TO PREVENT THE EXTRACTION OF ACRYLONITRILE FROM SAID SUBSEQUENTLY ADDED MONOMER PHASES,
Claim 5
Dependent Claim
9 words
HEATING SAID EMULSION TO A TEMPERATURE OF ABOUT 50*C.,
Claim 6
Dependent Claim
9 words
HEATING SAID EMULSION TO A TEMPERATURE OF ABOUT 50*C.,
Claim 7
Dependent Claim
9 words
heating said emulsion to a temperature of about 50*C.,
Claim 8
Dependent Claim
9 words
heating said emulsion to a temperature of about 50*C.,
Claim 9
Dependent Claim
102 words
maintaining said emulsion at a substantially constant temperature between about 50*C. and about 65*C. under autogenous pressure while adding a second monomer charge in an amount between about 3 and 20 weight percent of the total monomeric materials to be polymerized wherein said second monomer charge is composed of a ratio of monomers sufficient to form an interpolymer of from about 88 to 93 mole percent vinylidene chloride and from about 12 to 7 mole percent of a mixture of acrylonitrile and methyl methacrylate said mixture consisting of a molar ratio of acrylonitrile to methyl methacrylate of from about 1:1 to 4:1,
Claim 10
Dependent Claim
102 words
maintaining said emulsion at a substantially constant temperature between about 50*C. and about 65*C. under autogenous pressure while adding a second monomer charge in an amount between about 3 and 20 weight percent of the total monomeric materials to be polymerized wherein said second monomer charge is composed of a ratio of monomers sufficient to form an interpolymer of from about 88 to 93 mole percent vinylidene chloride and from about 12 to 7 mole percent of a mixture of acrylonitrile and methyl methacrylate said mixture consisting of a molar ratio of acrylonitrile to methyl methacrylate of from about 1:1 to 4:1,
Claim 11
Dependent Claim
102 words
MAINTAINING SAID EMULSION AT A SUBSTANTIALLY CONSTANT TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 65*C. UNDER AUTOGENOUS PRESSURE WHILE ADDING A SECOND MONOMER CHARGE IN AN AMOUNT BETWEEN ABOUT 3 AND 20 WEIGHT PERCENT OF THE TOTAL MONOMERIC MATERIALS TO BE POLYMERIZED WHEREIN SAID SECOND MONOMER CHARGE IS COMPOSED OF A RATIO OF MONOMERS SUFFICIENT TO FORM AN INTERPOLYMER OF FROM ABOUT 88 TO 93 MOLE PERCENT VINYLIDENE CHLORIDE AND FROM ABOUT 12 TO 7 MOLE PERCENT OF A MIXTURE OF ACRYLONITRILE AND METHYL METHACRYLATE SAID MIXTURE CONSISTING OF A MOLAR RATIO OF ACRYLONITRILE TO METHYL METHACRYLATE OF FROM ABOUT 1:1 TO 4:1,
Claim 12
Dependent Claim
102 words
MAINTAINING SAID EMULSION AT A SUBSTANTIALLY CONSTANT TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 65*C. UNDER AUTOGENOUS PRESSURE WHILE ADDING A SECOND MONOMER CHARGE IN AN AMOUNT BETWEEN ABOUT 3 AND 20 WEIGHT PERCENT OF THE TOTAL MONOMERIC MATERIALS TO BE POLYMERIZED WHEREIN SAID SECOND MONOMER CHARGE IS COMPOSED OF A RATIO OF MONOMERS SUFFICIENT TO FORM AN INTERPOLYMER OF FROM ABOUT 88 TO 93 MOLE PERCENT VINYLIDENE CHLORIDE AND FROM ABOUT 12 TO 7 MOLE PERCENT OF A MIXTURE OF ACRYLONITRILE AND METHYL METHACRYLATE SAID MIXTURE CONSISTING OF A MOLAR RATIO OF ACRYLONITRILE TO METHYL METHACRYLATE OF FROM ABOUT 1:1 TO 4:1,
Claim 13
Dependent Claim
82 words
MAINTAINING THE REACTION AT A SUBSTANTIALLY CONSTANT TEMPERATURE BETWEEN ABOUT 50*C. AND 65*C. UNDER AUTOGENOUS PRESSURE, AND AT THE RERMINATION OF THE POLYMERIZATION OF SAID SECOND MONOMER CHARGE BUT PRIOR TO A PRESURE DROP OF GREATER THAN ABOUT 2 P..S.I., ADDINT THE REMAINING MONOMERS TO BE POLYMERIZED IN SUBSTANTIALLY THE SAME RATIO AS PRESENT IN SAID SECOND MONOMER CHARGE AND AT A RATE OF BETWEEN ABOUT 4.5 AND 25 PERCENT OF SAID REMAINING MONOMERS PER HOUR; THEN UPON COMPLETION OF MONOMER ADDITION,
Claim 14
Dependent Claim
82 words
MAINTAINING THE REACTION AT A SUBSTANTIALLY CONSTANT TEMPERATURE BETWEEN ABOUT 50*C. AND 65*C. UNDER AUTOGENOUS PRESSURE, AND AT THE RERMINATION OF THE POLYMERIZATION OF SAID SECOND MONOMER CHARGE BUT PRIOR TO A PRESURE DROP OF GREATER THAN ABOUT 2 P..S.I., ADDINT THE REMAINING MONOMERS TO BE POLYMERIZED IN SUBSTANTIALLY THE SAME RATIO AS PRESENT IN SAID SECOND MONOMER CHARGE AND AT A RATE OF BETWEEN ABOUT 4.5 AND 25 PERCENT OF SAID REMAINING MONOMERS PER HOUR; THEN UPON COMPLETION OF MONOMER ADDITION,
Claim 15
Dependent Claim
82 words
maintaining the reaction at a substantially constant temperature between about 50*C. and 65*C. under autogenous pressure, and at the termination of the polymerization of said second monomer charge but prior to a pressure drop of greater than about 2 p.s.i., adding the remaining monomers to be polymerized in substantially the same ratio as present in said second monomer charge and at a rate of between about 4.5 and 25 percent of said remaining monomers per hour; then upon completion of monomer addition,
Claim 16
Dependent Claim
82 words
maintaining the reaction at a substantially constant temperature between about 50*C. and 65*C. under autogenous pressure, and at the termination of the polymerization of said second monomer charge but prior to a pressure drop of greater than about 2 p.s.i., adding the remaining monomers to be polymerized in substantially the same ratio as present in said second monomer charge and at a rate of between about 4.5 and 25 percent of said remaining monomers per hour; then upon completion of monomer addition,
Claim 17
Dependent Claim
28 words
continuing the polymerization reaction at a temperature of between about 50*C. and about 65*C. under autogenous pressure until about a 50 percent drop in reaction pressure occurs, then
Claim 18
Dependent Claim
28 words
continuing the polymerization reaction at a temperature of between about 50*C. and about 65*C. under autogenous pressure until about a 50 percent drop in reaction pressure occurs, then
Claim 19
Dependent Claim
28 words
CONTINUING THE POLYMERIZATION REACTION AT A TEMPERATURE OF BETWEEN ABOUT 50*C. AND ABOUT 65*C. UNDER AUTOGENOUS PRESSURE UNTIL ABOUT A 50 PERCENT DROP IN REACTION PRESSURE OCCURS, THEN
Claim 20
Dependent Claim
28 words
CONTINUING THE POLYMERIZATION REACTION AT A TEMPERATURE OF BETWEEN ABOUT 50*C. AND ABOUT 65*C. UNDER AUTOGENOUS PRESSURE UNTIL ABOUT A 50 PERCENT DROP IN REACTION PRESSURE OCCURS, THEN
Claim 21
Dependent Claim
15 words
SUBSTANTIALLY IMMEDIATELY COOLING THE REACTION TO A TEMPERATURE BELOW ABOUT 50*C. AND REMOVING UNREACTED MONOMER.
Claim 22
Dependent Claim
15 words
SUBSTANTIALLY IMMEDIATELY COOLING THE REACTION TO A TEMPERATURE BELOW ABOUT 50*C. AND REMOVING UNREACTED MONOMER.
Claim 23
Dependent Claim
15 words
substantially immediately cooling the reaction to a temperature below about 50*C. and removing unreacted monomer.
Claim 24
Dependent Claim
15 words
substantially immediately cooling the reaction to a temperature below about 50*C. and removing unreacted monomer.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |