Melt-processible polymer composition comprising fluoropolymer having long chain branches
Assignee3M Innovative Properties Company
InventorsStephen E. Amos, Klaus Hintzer, Harald Kaspar, Claude Lavallée
Life of this patent
Estimating the term…
Abstract
A polymer melt additive that is suitable for use as a processing aid in the extrusion of a non-fluorinated polymer. The polymer melt additive composition includes a fluoropolymer that has a long chain branching index (LCBI) of at least 0.2 and a zero shear rate viscosity at 265° C. of not more than 107 Pa's. The polymer melt additive may additionally include other compounds such as, polyoxyalkylene polymer or polycaprolactone.
Claims12
Melt-processible polymer composition comprising (a) a non-fluorinated melt-processible polymer;
- and (b) a fluoropolymer derived from the copolymerization of:
- (1) at least 20% by weight of vinylidene fluoride,
- (2) one or more fluorinated monomers, and
- (3) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefins, (ii) olefins corresponding to formula (IV):
- Xa2C═CXa—Rf—(Xb)r (IV)
- wherein each Xa independently represents hydrogen, fluorine, or chlorine, Rf is a perfluoroalkylene group, a perfluorooxyalkylene group or a perfluoropolyether group, Xb is Br or I and r is 1, 2 or 3 and (iii) mixtures thereof, and wherein the one or more modifiers are included in an amount not more than 1.0% by weight and is sufficient to form long chain branching in the fluoropolymer without the formation of gels.
Polymer melt additive composition for use as a processing aid in the extrusion or a non-fluorinated polymer, the polymer melt additive composition comprising a fluoropolymer derived from the copolymerization of (a) at least 20% by weight of vinylidene fluoride, (b) one or more fluorinated monomers, and (c) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (IV)
- Xa2C═CXa—Rf—(Xb)r (IV)
- wherein each Xa independently represents hydrogen, fluorine, or chlorine, Rf is a perfluoroalkylene group, a perfluorooxyalkylene group or a perfluoropolyether group, Xb is Br or I and r is 1, 2 or 3 and (iii) mixtures thereof, wherein the one or more modifiers are included in an amount not more than 1.0% by weight and is sufficient to form long chain branching in the fluoropolymer without the formation of gels, and the fluoropolymer is a processing aid in the melt processing of a non-fluorinated polymer.
Dependencies are inferred from the claim text.