Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-03-07
1988-03-15
Ziegler, Jacob
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525146, 525185, 525199, 525206, 525214, 525227, 525229, 525230, 525231, 525238, 525241, C08L 2716, C08L 3104, C08L 3308
Patent
active
047314176
ABSTRACT:
Disclosed is a multicomponent resin composition which is essentially a blend of three polymers, each of which may be a copolymer, and undergoes a change in light transmittance and color with temperature. The first and second polymers are chosen in combination such that a blend thereof exhibits a phase diagram in which a lower critical solution temperature appears, and the third polymer is one which has mutual solubility, at least partially, with either or both of the first and second polymers. For example, polymethyl methacrylate and a copolymer of vinylidene fluoride and hexafluoroacetone, as the first and second polymers, and polyvinyl acetate are blended together. The phase separation temperature or coloring temperature of the multicomponent resin composition depends on the amount of the third polymer, and opacifying and coloring of the resin composition caused by heating become irreversible by cooling when the amount of the third polymer is sufficient. The multicomponent resin composition is useful as a thermal-mode information storage material and also as a light shield material.
REFERENCES:
patent: 3342778 (1967-09-01), Anderson
patent: 4319002 (1982-03-01), Witschard
patent: 4546149 (1985-10-01), Kidoh et al.
Akiyama et al., "Polymer Blend," pp. 4-14, 1981.
Kobayashi Satoru
Miyata Seizo
Central Glass Company Limited
Ziegler Jacob
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