Preparation of homogeneous polymers using supercritical fluid so

Details Preparation of homogeneous polymers using supercritical fluid so Preparation of homogeneous polymers using supercritical fluid so

1993-11-19

1995-05-02

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 64, 525 69, 525 70, 525 72, 525 77, 525 78, 525 79, 525 80, 525 86, 525 87, 525 88, 525 89, 525 92B, 525 93, 525 94, 525 95, 525 96, 525 98, 525 99, C08G 6348, C08L 5108

Patent

active

054120276

ABSTRACT:
Homogeneous polymer blends are prepared from otherwise thermodynamically immiscible polymers, especially including block copolymers. Thus, polymers such as polystyrene/poly(methyl methacrylate) block copolymer or polystyrene/poly(1,2-butadiene) block copolymer are dissolved under pressure in supercritical fluid solvents such as chlorodifluoromethane and n-butane, respectively, and expanded through a fine nozzle. As the SCF solvent evaporates, the polymer deposits as a substantially homogeneous material.

REFERENCES:
patent: 3812224 (1974-05-01), Smith et al.
patent: 4582731 (1986-04-01), Smith
patent: 4594371 (1986-06-01), Nauman
patent: 4666961 (1987-05-01), Nauman
patent: 4703105 (1987-10-01), Allada
patent: 4734451 (1988-03-01), Smith
patent: 5106906 (1992-04-01), Meier et al.
A. K. Lele, A. D. Shine, "Dissolution and Precipitation of Polymers Using a Supercritical Solvent", Polymer Preprints, vol. 31, No. 1, p. 677, Apr. 1990.
B. D. Favis and L. A. Utracki, "Polyblends--'87 Preamble", Polym. Eng. Sci. 27, 1573 (1987).
D. Braun, P. R. Kohl and G. P. Hellmann, "The Glass Transition Temperatures of Homogeneous Blends of Polystyrene, Poly(methyl methacrylate), and Copolymers of Styrene and Methyl Methacrylate", Makromol. Chem. 189, 1671 (1988).
H. H. Chuah, T. Kyu and T. E. Helminiak, "The Kinetics of Phase Separation of PBT/Nylon 66 Molecular Composite", Polym. Mater. Sci. Eng. 56, 68 (1987).
E. B. Nauman, M. V. Ariyapadi, N. P. Balsara, T. A. Grocela, J. S. Furno, S. H. Liu and R. Mallikarjun, "Compositional Quenching: A Process for Forming Polymer-in-Polymer Microdispersions and Cocontinuous Networks", Chem. Eng. Comm. 66, 29 (1988).
A. R. Schultz and A. L. Young, "DSC on Freeze-Dried Poly(methyl methacrylate)-Polystyrene Blends", Macromolecules 13, 663 (1980).
D. W. Matson, R. C. Petersen, R. D. Smith, "Production of Powders and Films by the Rapid Expansion of Supercritical Solutions", J. Mat. Sci. 22, 1919 (1987).
L. H. Bangert, J. L. Lundberg, J. D. Muzzy, G. H. Hoyes, L. H. Olson, W. D. Freeston, "Advanced Technology Applications in Garment Processing", NSF Report RA-770428, NTIS PB 284, 779 (1977).
V. Krukonis, "Supercritical Fluid Nucleation of Difficult to Comminute Solids", presented at the AIChE Annual Meeting, San Francisco, Nov. (1984).
R. C. Peterson, D. W. Matson, R. D. Smith, "Rapid Precipitation of Low Vapor Pressure Solids from Supercritical Fluid Solutions: The Formation of Thin Films and Powders", J. Am. Chem. Soc. 108, 2100 (1986).
D. W. Matson, R. C. Peterson, R. D. Smith, "The Precipitation of Polycarbosilane Powders and Fibers During Rapid Expansion of Supercritical Fluid Solutions", Mater. Lett. 4 (10), 429 (1986).
R. G. Hill, P. E. Tomlins, J. S. Higgins, "A Preliminary Study of the Dynamics of Phase Separation in Oligomeric Polystyrene-Polybutadiene Blends", Polymer 26, 1708 (1986).
C. C. Han, M. Okada, Y. Muroga, B. J. Bauer, Q. Tran-Cong, "Phase Decomposition Phenomena in Polystryrene/Poly(vinyl methyl ether)", Polym. Eng. Sci. 26, 1208 (1986).
T. Hashimoto, "Structure Formation in Polymer Mixtures by Spinodal Decomposition", in Current Topics in Polymer Science, vol. II, R. M. Ottenbrite, L. A. Ultracki and S. Inoue, eds., Hanser, New York, 199 (1987).
U. Delaware, Dept. of Chem. Eng. Research Report 1989, Apr. 3, 1990, p. 35.

Affiliated with

Also associated with

Rating

Preparation of homogeneous polymers using supercritical fluid so does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of homogeneous polymers using supercritical fluid so, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of homogeneous polymers using supercritical fluid so will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1137780