Compositions of polyvinyl chloride and tetracarboxylic tetraeste

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...

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524289, 524290, 524292, 524294, 604 96, 604 93, 604246, 604266, 604280, 604408, C08K 510

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active

045607206

ABSTRACT:
Medical articles made of a resin composition comprising a polyvinyl chloride and a tetracarboxylic tetraester are provided. As examples of the tetracarboxylic tetraester are mentioned tetra(2-ethylhexyl) 3,3',4,4'-biphenylethertetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenylmethanetetracarboxylate, tetra(n-dodecyl) 2,3,3',4'-biphenyl-1,1-ethanetetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenyl-2,2-propanetetracarboxylate and the like. The tetracarboxylic tetraester is incorporated in an amount from 20 to 120, preferably from 30 to 100 parts by weight per 100 parts by weight of the polyvinyl chloride. As dissolution and migration to the surface of the article of the plasticizer tetracarboxylic tetraester are low in the medical articles, said medical articles produce no adverse effects upon body fluids such as blood when contacted. Examples of preferred medical articles are blood preservation vessels, catheters and blood transfusion sets.

REFERENCES:
patent: 2963461 (1960-12-01), Pockel
patent: 3379753 (1968-04-01), Bremmer et al.
patent: 4265276 (1981-05-01), Hatada et al.
patent: 4381210 (1983-04-01), Ishizuka et al.
C.A. No. 73149a Poly(vinyl chloride) composition with improved electrical and heat resistance (Japan), Aug. 1972.

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