Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-09-19
2000-04-11
Short, Patricia A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525420, 525432, 525433, 525437, 525439, 525444, 525450, 525461, 525534, 525537, 525540, C08L 6702, C08L 6900, C08L 7700, C08L 8100
Patent
active
060489480
ABSTRACT:
There is a provided a method to produce a polymer composite material in which the rigid polymer (R.sub.m).sup.n is dispersed uniformly at the molecular level in the flexible polymer (M), preferably by both polymerization with no solvent in the molten and mixed state and subsequent polymerization in the solid state. According to the preferred embodiment of the present invention, the polymer composite material is produced by polymerization with no solvent in the molten and mixed state. In the case that the rigid polymer is polymerized from the monomer having a slow polymerization rate, in order to prevent roughness of the rigid polymer during polymerization, the polymerization in the molten state is stopped at the polymerization degree equal to that of an oligomer and the resulting composite is subsequently polymerized in the solid state to increase the polymerization degree of the rigid polymer. Therefore, the rigid polymer having excellent mechanical properties can be dispersed microscopically at the molecular level in the matrix polymer to achieve the reinforcing effect at the molecular level. And a small addition of the rigid polymer can enhance an elastic modulus and a strength.
REFERENCES:
patent: 4075173 (1978-02-01), Maruyama
patent: 4207407 (1980-06-01), Helminiak et al.
patent: 4228218 (1980-10-01), Takayanagi et al.
patent: 4408022 (1983-10-01), Cincotta
patent: 4460736 (1984-07-01), Froix
Billmeyer F.W., Textbook of Polymer Science, 2d Ed. p. 233 Wiley-Interscience, NY (1971).
Mazda Motor Corporation
Short Patricia A.
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