Fluorocopolymers
View Patent ↗A process for the preparation of a fluoroolefin polymer, including the step of: contacting in a reaction zone: an initiator; CF 3 CF═CH 2 , and optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith; wherein the contacting is carried out at a temperature, pressure and length of time sufficient to produce the fluoroolefin polymer.
1. A process for the preparation of a fluoroolefin polymer, comprising the step of:
contacting in a reaction zone:
an initiator;
CF 3 CF═CH 2 , and
at least one ethylenically unsaturated comonomer selected from the group consisting of acrylate, methacrylate or α-trifluoromethylacrylate ester of 4 to 24 carbon atoms, hydroxyethyl acrylate, methacrylate or α-trifluoromethylacrylate, hydroxypropyl acrylate, methacrylate or α-trifluoromethylacrylate, glycidyl acrylate, methacrylate or α-trifluoromethylacrylate, and acrylonitrile, methacrylonitrile, wherein said contacting is carried out at a temperature, pressure and length of time sufficient to produce said fluoroolefin polymer.
2. The process of claim 1 , wherein said reaction zone further comprises a solvent selected from the group consisting of: esters, ketones, ethers, aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, ethyl acetate, butylacetate, 1-methoxy-2-propanol acetate, toluene, xylene, methyl ethyl ketone, 2-heptanone, and 1,1,1-tri-chloroethane, and mixtures thereof.
3. The process of claim 1 , wherein said ethylenically unsaturated comonomer is selected from the group consisting of: methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, ethylhexylacrylate, octyl acrylate, dodecyl acrylate, stearyl acrylate, benzyl acrylate, phenyl acrylate, methylmethacrylate, ethylmethacrylate, butylmethacrylate, ethylhexymethacrylate, and mixtures thereof.
4. The process of claim 3 , wherein said ethylenically unsaturated comonomer is selected from the group consisting of: methyl acrylate, ethyl acrylate, hydroxyethyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, and hydroxyethyl methacrylate.
5. The process of claim 1 , wherein the CF 3 CF═CH 2 monomer is from about 10 wt % to about 99 wt % of the total weight of the polymer.
6. The process of claim 1 , wherein the CF 3 CF═CH 2 monomer is from about 20 wt % to about 85 wt % of the total weight of the polymer.
7. The process of claim 1 , wherein the CF 3 CF═CH 2 monomer is from about 30 wt % to about 70 wt % of the total weight of the polymer.
8. The process of claim 1 , wherein said ethylenically unsaturated comonomer is from about 70 wt % to about 30 wt % of the total weight of the polymer.
9. The process of claim 1 , wherein said ethylenically unsaturated comonomer comprises at least two ethylenically unsaturated comonomers.
10. The process of claim 1 , wherein said contacting is carried out at a temperature from about 10° C. to about 80° C.
11. The process of claim 1 , wherein said contacting is carried out at a temperature from about 20° C. to about 60° C.
12. The process of claim 1 , wherein said contacting is carried out at a pressure from about 50 psig to about 500 psig.
13. The process of claim 1 , wherein said contacting is carried out at a pressure from about 80 psig to about 260 psig.
14. The process of claim 1 , wherein said contacting is carried out at a length of time from about 4 hours to about 20 hours.
15. The process of claim 1 , wherein said contacting is carried out at a length of time from about 6 hours to about 12 hours.
16. The process of claim 1 , wherein said initiator is selected from the group consisting of: azobiscyanoacrylates, aliphatic peresters, aliphatic peroxides, aliphatic hydroperoxides, acylperoxides, persulfates, percarbonates, active metals in the presence of telogens and mixtures thereof.
17. The process of claim 1 , wherein said persulfate initiator is selected from the group consisting of: sodium persulfate, potassium persulfate, ammonium persulfate, iron persulfate, and a mixture thereof.
18. The process of claim 1 , carried out as a continuous, batch, vapor phase, or a fixed bed process.
19. The process of claim 1 , carried out as a solution, emulsion, or suspension polymerization process.
20. A homopolymer of CF 3 CF═CH 2 prepared by the process of claim 1 .
21. A copolymer prepared by the process of claim 1 .
22. A terpolymer prepared by the process of claim 1 .
23. A polymer blend comprising at least two polymers selected from the group consisting of: a homopolymer, copolymer, and terpolymer prepared by the process of claim 1 .