Octadecyl methacrylate

Kragl and Dreisbach (1996) have carried out the enantioselective addition of diethyl zinc to benzaldehyde in a continuous asymmetric membrane reactor using a homogeneous soluble catalyst, described in their paper. Here a,a-diphenyl-L-proline was used as a chiral ligand, coupled to a copolymer made from 2-hydroxy ethyl methacrylate and octadecyl methacrylate, which had a sufficiently high molecular weight to allow separation by ultra-filtration (U/F). The solvent-stable polyaramide U/F Hoechst Nadir UF PA20 retained more than 99.8% of the catalyst. The ee was 80 %, compared to 98 % for a noncoupled catalyst. 

This new DLS tool was integrated into the microreactors by placing it at the end of a chip that synthesized amphiphilic block copolymers from methyl methacrylate and either lauryl methacrylate or octadecyl methacrylate (Fig. 22b). The reaction... 

Ailhaud et al.216 have synthetized by anionic polymerization in THF solution with diphenylmethylsodium or diphenylmethylpotassium as initiators the following block copolymers poly(methyl methacrylate)-poly(hexyl methacrylate) (MMA-HMA), poly(methyl methacrylate)-poly(lauryl methacrylate) (MMA-LMA), poly(methyl methacrylate)-poly(octadecyl methacrylate) (MMA-OMA), poly(hexyl-methacrylate)-poly(lauryl methacrylate) (HMA-LMA). 

F 2 Fee, J. G., W. S. Port and L. P. Witnauer Molecular weight viscosity relationship of gamma-irradiated octadecyl vinyl ether and octadecyl methacrylate. J. Polymer Sci. 33, 95 (1958). 

Poly(octadecyl methacrylate) Poly(phenyl methacrylate) 378/393 309 1.5706/1.7515 ... 

It is well known that emulsion polymerizations of highly water-insoluble monomers such as octadecyl methacrylate (OM), dodecyl methacrylate (DM), and stearyl acrylate (SA) are generally not feasible using traditional surfactant... 

Polytmethyl methacrylate)-poly(hexyl methacrylate) Poly(methyl methacrylate)-poly(lanryl methacrylate) Poly(methyl methacrylate)-poly(octadecyl methacrylate) Poly hexyl methacrylate)-poly(lauryl methacrylate)... 

Not only polystyrene supports, also other polymer supports were used in the preparation of polymeric amino alcohol ligands for dialkylzinc alkylation. For example, a vinylferrocene derivative with A,N -disubstituted norephedrine was copolymerized with vinylferrocene [60]. This polymeric chiral ligand (53) was used in the ethylation of aldehydes with moderate activity. Brown has reported that chiral oxazaborolidines have catalytic activity in the addition of diethyl zinc to aldehydes [61]. Polymers bearing chiral oxazaborolidines 37 were also active in the reaction and result on moderate enantioselectivity (<58 % ee) [62]. Enantiopure a,a -diphenyl-L-prolinol coupled to a copolymer prepared from 2-hydroxyethylmethacrylate and octadecyl methacrylate... 

For the example of the addition of diethylzinc 2 to benzaldehyde 1 (eq. (1)), a continuous asymmetric synthesis in a membrane reactor using a homogeneously soluble catalyst [38, 39] has been developed for the first time. a,a-Diphenyl-t-pro-linol, which is used as the chiral ligand, has been coupled to a copolymer made from 2-hydroxyethyl methacrylate and octadecyl methacrylate [49] (molecular weight 96000 g mol ), resulting in the polymer-enlarged chiral ligand 4 [50]. 

Photopolymerisation of Langmuir-Blodgett films continues to attract interest. Polymeric monolayer films of octadecyl methacrylate with methacrylamide con-... 

Poly(dodecyl methacrylate) 239 Poly(octadecyl methacrylate) 309... 

Poly(ethylene-2,6-naphthalenedicarboxylate) 242.23 Poly(octadecyl methacrylate) 338.57... 

The monomers, N-vinyl carbazole (NVC), methacrylamide (MAM), octadecyl methacrylate (ODMA) and trichloroethyl methacrylate (TCEM) were obtained from Polyscience, Inc. Diphenyl acetylene (DPAE), poly(4-chlorostyrene) (PC1S), poly(butadiene) (PBD), poly(styrene) (PS) were obtained from Aldrich Chemical Co. Poly (vinyl alcohol) (PVA), 99-100% hydrolyzed, was obtained from J. T. Baker Chemical Co. Poly(vinyl pyrrolidone) was obtained from Sigma Chemical Co. 

Octadecyl methacrylate (ODMA) can be polymerized by electron beam irradiation (9). When ODMA is used as the monomer with PTCEM as the base polymer, the resolution and line profile of the PDE is poor. This poor performance may be in part due to the low glass transition temperature of poly(octadecyl methacrylate) (PODMA) and the small plasma etch rate difference between PODMA and PTCEM. 

Ageflex FM-68 Ageflex FM-1620 A13-25418 EINECS 251-013-5 Methacrylio acid, octadecyi ester Methacrylic acid, stearyl ester Octadecyl methacrylate 2-Propenoic acid, 2-methyl-, octadecyl ester. Natural, C16-I8 methacrylates, with 100 ppm hydroquinone inhibitor lube oil additive, pour point depressant, paper coatings, textile finishes, paints, varnishes, pressure-sensitive adhesives. Lube oil additive, pour point depressant. Used in paper coatings, textile finishes, paints, varnishes, pressure-sensitive adhesives. Liquid bps = 181° d 8 = 0.868 f.p. -20° flash pt. 110°. Rit-Chem Rohm Haas Co. Sartomer. 

Wandrey and co-workers pioneered the use of homogeneous catalysts bound to soluble supports in continuously operating membrane reactors (CFMRs). In 1996 Kragl and Dreisbach reported on a chiral polymer-enlarged homogeneous catalyst, which was used for the enantioselective addition of diethylzinc to benzaldehyde [Eq. (3)] [9]. The catalyst consisted of a soluble polymeric support, a copolymer of 2-hydroxyethylmethacrylate and octadecyl methacrylate, combined with a,a-diphe-nyl-L-prolinol as the active organocatalytic site (2). 

Malhotra studied the effect of alkyl substituent on the ultrasonic degradation of poly (alkyl methacrylate) [197]. He prepared poly(isopropyl methacrylate) and poly (octadecyl methacrylate) of identical contour length (Fig. 23a). In an acoustic field, he failed to see any dependence of the rate constant on the size of side groups. Recently, May revisited the effect of side group using a spiropyran... 

Polymer (B) poly(octadecyl methacrylate) Characterization MJkg.moC = 170, Scientific Polymer Products, Inc., Ontario, NY Solvent (A) ethene C2H4 Solvent (C) octadecyl methacrylate C22H42O2 Type of data cloud points 2001BY 74-85- 32360-05... 

BYU Byun, H.-S., Kim, K., Kim, N.H., and Kwak, C., Cosolvent effect and phase behavior of poly(octadecyl methacrylate)-C02 mixtures at high pressiue, J. Korean Ind. Eng. Chem., 12, 212, 2001. 

---