Fluorinated Acrylics
“It is known that by introducing a fluorine atom into a molecular structure of a polymer an improvement in heat resistance, weathering resistance, electric property, sliding performance, chemical resistance, water-repelling or oil-repelling performance or mechanical property can be achieved when compared with an existing hydrocarbon-based plastic, and various fluorine resins such as polytetrafluoroethylenes and polyvinylidene fluorides have been marketed so far. However, a fluorine resin is used currently only in a limited range since it is very expensive and has a poor moldability.”
“On the other hand, a (meth)acrylate polymer is a very inexpensive versatile resin, and it has already been proposed that by using this polymer as a starting material and introducing a certain functional group a novel resin can be obtained. For example, Japanese Unexamined Patent Publication No. 6-240017 discloses a technology for effecting an imidation by reacting a (meth)acrylate polymer with a primary amine, which is purported to improve the heat resistance of the (meth)acrylate polymer (See patent reference 1).”
“While there are two ways for introducing a fluorine atom into a (meth)acrylate polymer, one being a method of producing from a monomer such as a method of polymerizing a fluorine atom-substituted (meth)acrylate monomer (see patent references 2 and 3) and the other being a method of utilizing an existing polymer such as a method of reacting a (meth)acrylic acid polymer or a (meth)acrylate polymer with a fluorine atom-containing amine (see patent references 4 and 5), the former method requires a special polymerization facility and the latter method employs an expensive and highly toxic fluorine atom-containing amine, thus both posing problems.”
Recent US Patents
12/7/2010
7,847,056
Method for producing fluorine-containing (meth)acrylate polymer and polymer produced by such method
Horii et al of Kaneka, Japan, fluorinated acrylic polymers by reacting an acrylic polymer with an alcohol containing a fluorine atom in the presence of a transesterification catalyst. The transesterification catalyst promotes the reaction rate of the transesterification reaction by which a substituent on an ester group is converted. Any commonly used transesterification catalyst can be employed, including alkaline metal carbonates, alkaline metal bicarbonates, alkaline earth (RDC 5/19/2011)
Recent Journal Articles
The suspension–emulsion combined polymerization of fluorinated acrylic monomer and the fluorinated latex film surface properties
(149-157) Colloid and Polymer Science 289 #2 (2011)
Peng et al, China fabricated perfluoroacrylate-containing copolymer composite particles by suspension–emulsion combined polymerization (SECP). The fluorinated latexes with better stability and those fluorinated films with high surface fluorine content were prepared by SECP using fluorine-free surfactants as an emulsifying agent. The P(MMA–BA) latex particles gradually coagulated with P(PFA–BA) particles after adding emulsion polymerization constituents at the midstage of the suspension polymerization, and fluorinated composite particles with core–shell structure and larger size were obtained. (RDC 2/14/2011)
Fluorine-containing linear block terpolymers: Synthesis and self-assembly in solution
( 414–422)Journal of Polymer Science Part A: Polymer Chemistry 49 #2 (2011)
He et al synthesized linear triblock terpolymers of poly(n-butyl methacrylate)-b-poly(methyl methacrylate)-b-poly(2-fluoroethyl methacrylate) (PnBMA-PMMA-P2FEMA) by sequential reversible addition fragmentation chain transfer (RAFT) polymerization. These polymers formed micellar aggregates in a selective solvent mixture. It was found that these terpolymers could directly self-organize into complex micelles in a tetrahydrofuran/methanol mixture with diameters that depended on polymer composition. (RDC 12/17/2010)
Novel superhydrophobic silica/poly(siloxane-fluoroacrylate) hybrid nanoparticles prepared via surface-initiated ATRP and their surface properties: The effects of polymerization conditions
( 174–183) Journal of Polymer Science Part A: Polymer Chemistry 49 #1 (2011)
Yu and Luo of Xiamen University, China synthesized a series of superhydrophobic poly(methacryloxypropyltrimethoxysilane, MPTS-b-2,-2,3,3,4,4,4-heptafluorobutyl methacrylate, HFBMA)-grafted silica hybrid nanoparticles (SiO2/PMPTS-b-PHFBMA) by two-step surface-initiated atom transfer radical polymerization. The results also showed that both the surface microphase separation and roughness of the hybrid nanoparticles could be strengthened with the increase of the molecular weight of polymer-grafted silica hybrid nanoparticles. (RDC 12/9/2010)