Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1994-09-12
1997-09-16
Nagumo, Mark
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526134, 5263031, 526341, 526279, 526309, 526943, 528319, 528323, 528326, 528357, 528359, C08F 2014, C08F 4643, C08G 6308
Patent
active
056682344
ABSTRACT:
Acrylate monomers such as methyl methacrylate, or other suitable monomers such as lactams, lactones, or acrylamides, are polymerized by reaction injection molding (RIM) utilizing a combination of organo group-4 catalysts, e.g., a neutral organo catalyst and a cationic organo catalyst. Preferably a Lewis acid is utilized which reacts with the neutral organo catalyst and forms in situ the cationic organo catalyst. Significant exotherms are rapidly generated and result in short cure times and typically in high conversions of at least 95 percent by weight of the monomer. The catalysts of the present invention give good control of tacticity and thus high Tg polymers such as syndiotactic methyl methacrylate can be produced. The use of the combination organo group-4 catalysts are well suited for reaction injection molding of finished articles wherein the neutral catalyst is fed to a mixing device in at least one stream and the cationic organo catalysts or the Lewis acid is fed in at least one or more different streams.
REFERENCES:
patent: 4728706 (1988-03-01), Farnham et al.
patent: 5198401 (1993-03-01), Turner et al.
patent: 5241025 (1993-08-01), Hlatky et al.
patent: 5276119 (1994-01-01), Kelsey
patent: 5312881 (1994-05-01), Marks et al.
An article entitled "Group-Transfer Polymerization Using Cationic Zirconocene Compounds" byScott Collins and David G. Ward, Journal of American Chemical Soc., vol. 114, No. 13, 1992.
NASA Technical Translation TT-21548 of Japanese Patent 2-258808, "Methods of Producing Vinyl-Type Polymers," Akira Nakamura, Hajime Yasuda, Oct. 19, 1990.
An article entitled "Coordination Polymerization Using Ziegler-Natta-Type Regents," Davis, Haddleton, and Richards, J.M.S.-Rev. Macromol. Chem. Phys. 1994, C34(1) 243-324. 294-7.
An article entitled "Free-Radically Initiated Polymerisations for Reaction Injection Mouldin (RIM): Some Observations On Polymer Blends Involving Poly(Methyl Methacrylate) As One Of The Components," P. D., Armitage, P. D. Coates, A. F. Johnson, S. Hill, J. Hydns, J. Leadbitter, and J. Myktiuk-Makromol. Chem. Macromol, Symp. 10/11, 593-615 (1987).
Collins Scott
Goodall Brian Leslie
Rhodes Larry Funderburk
Dunlap Thoburn T.
Hudak Daniel J.
Nagumo Mark
Shust Nestor W.
LandOfFree
Reaction injection molding (RIM) of methyl (meth)acrylate and re does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reaction injection molding (RIM) of methyl (meth)acrylate and re, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reaction injection molding (RIM) of methyl (meth)acrylate and re will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-219218