Photophobic medical soft polyvinyl chloride plastic and preparation method thereof

Abstract

The invention provides a photophobic medical soft polyvinyl chloride plastic and a preparation method thereof. The photophobic medical soft polyvinyl chloride plastic comprises the following compositions in part by weight: 100 parts of polyvinyl chloride resin, 10 to 90 parts of plasticizer, 1 to 10 parts of stabilizer, 1 to 10 parts of auxiliary stabilizer, 0.1 to 2.0 parts of ultraviolet absorber, 0.1 to 0.5 part of auxiliary antioxidant and 0.1 to 6 parts of surfactant. In the photophobic medical soft polyvinyl chloride plastic, a proper opacifier and the surfactant are selected, pohydrophilic and oleophilic property of the surfactant are utilized, the photophobic medical soft polyvinyl chloride plastic is dispersed more evenly and combined more firmly in a system containing a lipoid plasticizer, the use amount of the opacifier is reduced, and a pigment is difficult to separate out; and the photophobic medical soft polyvinyl chloride plastic has good dissolution resistance, and is suitable for producing special liquid bags, conduits, medical accessories, drip chambers and various disposable medical products. Various indexes of a reduction material and the like of a finished product meet the requirement of GB18458.3-2005 standard; and the photophobic range can meet the special requirement and is even expanded to all wave bands.

Description

technical field [0001] The invention relates to a medical soft polyvinyl chloride plastic and a preparation method thereof, in particular, to a medical disposable medical product which can avoid or reduce the transmission of light of certain specific wave bands or light of all wave bands. Soft PVC plastic. Background technique [0002] Medical soft polyvinyl chloride plastics usually require protection from light. Light can accelerate the oxidation of some drugs, and cause photochemical degradation of some drugs, which not only reduces the potency of the drug, but also produces color and precipitation, seriously affects the quality of the drug, and even increases the toxicity of the drug. For example, some drugs with poor stability are often made into powder injections and kept airtight in the dark. When used clinically, the stability decreases after dissolution, and the drug may undergo reactions such as oxidation, decomposition, and discoloration due to the action of lig...

AI Technical Summary

Problems solved by technology

[0004] The current conventional method is to use "opacifying agents" so that the transmittance of certain specific wavelengths of light is less than 35% or lower, but if a large amount of opacifying agents are used, it may cause a small amount of dissolution or even shedding.

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