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US3892822A
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Reconstitutable vinyl acetate polymer powders from non-aqueous dispersion
Assignee: Union Carbide Corp
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Filing: 1974-02-20
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Granted: 1975-07-01
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Expires: 1994-02-20
Abstract
Abstract Vinyl acetate polymer powders have been prepared which are readily converted to latices with water. Their preparation is accomplished by first copolymerizing vinyl acetate with a small amount of a dialkyl fumarate in an non-aqueous dispersion polymerization system followed by polymerization of a small amount of methacrylic acid onto the surface of each particle in the non-aqueous dispersion. The final step involves treating the polymer particles thus formed with about a stoichiometric amount of a tertiary amine, diamine, or tetralkylene diamine. The powders thereby obtained readily formed stable latices upon addition of water.
Inventors
- 👤 Arthur C Frechtling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F263/00; C08F263/02; C08F263/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
A METHOD OF PREPARING VINYL ACETATE POLYMERS IN A POWDER FORM WHICH ARE READILY CONVERTED TO STABLE LATICES BY ADDITION OF WATER WHICH COMPRISES: A. RAPIDLY ADDING WITH AGITATION, IN ONE CONTINUOUS OPERATION ABOUT 3 TO ABOUT 8 PARTS BY WEIGHT OF METHACRYLIC ACID TO A STABLE NON-AQUEOUS DIPERSION CONTAINING 100 PARTS BY WEIGHT OF VINYL ACETATE/DIALKYL FURMARATE COPOLYMER HAVING ABOUT 0.5 TO 6 PERCENT BY WEIGHT OF DIALKYL FURMARATE COPOLYMERIZED THEREIN, WHEREIN THE ALKYL GROUPS CONTAIN ABOUT 8 TO ABOUT 18 CARBON ATOMS, IN AN ORGANIC DILUENT SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC HYDROCARBONS CONTAINING FROM ABOUT 4 TO ABOUT 12 CARBON ATOMS AND ALICYLIC HYDROCARBONS CONTAINING FROM ABOUT 5 TO ABOUT 8 CARBON ATOMS, AT A TEMPERATURE OF ABOUT 5 TO ABOUT 150*C. IN THE PRESENCE OF A POLYMERIZATION INITIATING AMOUNT OF A FREE RADICAL POLYMERIZATION INITIATOR, B. MAINTAINING A TEMPERATURE OF ABOUT 20*C TO ABOUT 150*C FOR AT LEAST ABOUT 5 MINUTES WHEREBY METHACRYLIC ACID IS POLYMERIZED ONTO THE SURFACE OF THE VINYL ACETATE/DIALKYL FUMARATE COPOLYMER, C. NEUTRALIZING THE CARBOXYL GROUPS OF THE METHACRYLIC ACID WITH ABOUT A STOICHIOMETRIC AMOUNT OF AN ORGANIC AMINE SELECTED FROM THE GROUP CONSISTING OF (1) TRIALKYL-AMINES HAVING THE FORMULA
Claim 2
Independent Claim
199 words
A METHOD OF PREPARING VINYL ACETATE POLYMERS IN A POWDER FORM WHICH ARE READILY CONVERTED TO STABLE LATICES BY ADDITION OF WATER WHICH COMPRISES: A. RAPIDLY ADDING WITH AGITATION, IN ONE CONTINUOUS OPERATION ABOUT 3 TO ABOUT 8 PARTS BY WEIGHT OF METHACRYLIC ACID TO A STABLE NON-AQUEOUS DIPERSION CONTAINING 100 PARTS BY WEIGHT OF VINYL ACETATE/DIALKYL FURMARATE COPOLYMER HAVING ABOUT 0.5 TO 6 PERCENT BY WEIGHT OF DIALKYL FURMARATE COPOLYMERIZED THEREIN, WHEREIN THE ALKYL GROUPS CONTAIN ABOUT 8 TO ABOUT 18 CARBON ATOMS, IN AN ORGANIC DILUENT SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC HYDROCARBONS CONTAINING FROM ABOUT 4 TO ABOUT 12 CARBON ATOMS AND ALICYLIC HYDROCARBONS CONTAINING FROM ABOUT 5 TO ABOUT 8 CARBON ATOMS, AT A TEMPERATURE OF ABOUT 5 TO ABOUT 150*C. IN THE PRESENCE OF A POLYMERIZATION INITIATING AMOUNT OF A FREE RADICAL POLYMERIZATION INITIATOR, B. MAINTAINING A TEMPERATURE OF ABOUT 20*C TO ABOUT 150*C FOR AT LEAST ABOUT 5 MINUTES WHEREBY METHACRYLIC ACID IS POLYMERIZED ONTO THE SURFACE OF THE VINYL ACETATE/DIALKYL FUMARATE COPOLYMER, C. NEUTRALIZING THE CARBOXYL GROUPS OF THE METHACRYLIC ACID WITH ABOUT A STOICHIOMETRIC AMOUNT OF AN ORGANIC AMINE SELECTED FROM THE GROUP CONSISTING OF (1) TRIALKYL-AMINES HAVING THE FORMULA
Claim 3
Dependent Claim
12 words
Method claimed in claim 1 wherein the dialkyl fumarate is di-2-ethylhexyl fumarate.
Claim 4
Dependent Claim
13 words
Method claimed in claim 1 wherein the organic amine is a trialkyl amine.
Claim 5
Dependent Claim
12 words
Method claimed in claim 3 wherein the trialkyl amine is n-tributyl amine.
Claim 6
Dependent Claim
12 words
Method claimed in claim 3 wherein the trialkyl amine is n-trioctyl amine.
Claim 7
Dependent Claim
13 words
Method claimed in claim 1 wherein the organic amine is a tetraalkyl alkylenediamine.
Claim 8
Dependent Claim
12 words
Method claimed in claim 6 wherein the tetraalkyl alkylenediamine is tetramethyl ethylenediamine.
Claim 9
Dependent Claim
14 words
Method claimed in claim 1 wherein the free radical polymerization initiator is t-butylperoxy pivalate.
Claim 10
Dependent Claim
19 words
Method claimed in claim 1 wherein the temperature in step (a) is maintained in the range of about 55*-75*C.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |