Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1989-02-09
1993-07-27
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524321, 524400, 524583, 2641761, 2642106, 528486, 528489, C08K 509, C08K 320
Patent
active
052311260
ABSTRACT:
This invention relates to obtaining beta crystalline Phase isotactic polypropylene with high purity and thermal stability simply by melt-crystallization in the presence of a two component beta nucleating agent. The two component beta-nucleating agent is formed by mixing 0.0001-1 weight % of dibasic acid with 0.001-1 weight % oxide, hydroxide or acid salt of a Group IIA metal. Such beta phase polypropylene can be used for the production of high impact strength molding extrusion shapes, microporous film and microporous hollow fiber.
REFERENCES:
patent: 3118847 (1964-01-01), Greear et al.
patent: 3207736 (1965-09-01), Wijga
patent: 3257366 (1966-06-01), Monroe et al.
patent: 3431225 (1969-03-01), Duncan
patent: 3773741 (1973-11-01), Berta
patent: 4185148 (1980-01-01), Sato et al.
patent: 4386129 (1983-05-01), Jacoby
patent: 4454281 (1984-06-01), Heitz et al.
patent: 4704421 (1987-11-01), Teskin
Hackh's Chemical Dictionary, J. Grant (ed.), McGraw-Hill, Inc., N.Y., 17, 73, 186, 523 (1969).
Leugering et al, "Effects of Crystal Structure and Superstructure on Several Properties of Polypropylene", Die Makromolekulare Chemie 109 (1967), pp. 204-216.
Moos et al, "Nucleation and Polymorphy in Isotactic Polypropylene", Die Angewandte Makromolekulare Chemie 94 (1981), pp. 213-225.
W. Ullmann et al, "Studies on the Monoclinic and Hexagonal Modifications of Isotactic Polypropylene", Progr. Colloid & Polymer Sci. 66, pp. 25-33 (1979).
Morrow, "Polymorphism in Isotactic Polypropyelen", J. Maxromol. Sci.-Phys., B3(1), pp. 53-65 (Mar. 1969).
A. Turner Jones et al, "Crystalline Forms of Isotactic Polypropylene", Imperial Chemical Industries Limited, Welwyn Garden City, Herts., England, Oct. 1963.
Jing Hesheng
Shi Guan-yi
Zhang Jing-yun
LandOfFree
Beta-crystalline form of isotactic polypropylene and method for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Beta-crystalline form of isotactic polypropylene and method for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beta-crystalline form of isotactic polypropylene and method for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2342693