Preparation method of medical pressure sensitive adhesive (PSA)

Abstract

The invention discloses a preparation method of a medical pressure sensitive adhesive (PSA). The preparation method comprises the following steps: firstly adding 2-7 parts of butyl rubber, 7-10 parts of glycerol ester of rosin, 1-5 parts of polyethylene glycol, 1-3 parts of calcium lignosulphonate and 2-4 parts of sodium alginate by weight to a stirrer to be stirred and mixed uniformly to obtain a material I; secondly adding 2-5 parts of diethyl phosphite and 3-7 parts of chlorinated paraffin by weight to the material I, mixing the materials uniformly and then mixing the mixture to obtain a mixed product; and finally adding 2-5 parts of maleamic acid and 3-6 parts of methacrylic acid by weight to the mixed product, heating and stirring the materials for 30-50 minutes in the presence of an inert gas and then mixing, thus obtaining the medical PSA. The medical PSA provided by the invention has the beneficial effects that the initial adhesion achieves the degree of No.32 standard steel balls; the holding power is more than 115 minutes; and the medical PSA has low peel strength and good peel integrity and can be better applied to the medical field.

Description

technical field [0001] The invention belongs to the technical field of medical polymer materials, and in particular relates to a preparation method of medical pressure-sensitive adhesive. Background technique [0002] Pressure-sensitive adhesives are referred to as pressure-sensitive adhesives for short. They are adhesive at room temperature and can be bonded with a little pressure. Pressure-sensitive adhesives and their products have developed into an independent branch of adhesives. There are two types of pressure-sensitive adhesives: rubber type and resin type. The rubber type can be natural rubber or synthetic rubber, and the largest amount is natural rubber. Resin-type acrylate pressure-sensitive adhesives are the most important. In terms of form, pressure sensitive adhesives are divided into solvent type, emulsion type, hot melt type and liquid curing type. The output of solvent-based pressure-sensitive adhesives is gradually decreasing due to high solvent prices, t...

AI Technical Summary

Problems solved by technology

At present, the commonly used medical pressure-sensitive adhesive paste has a good effect, but there are problems such as poor stickiness, incomplete peeling, and high peeling force, which leads to a certain pain for the patient when peeling off, so it is suitable for sensitive parts. There is a lot of trouble, and the peeling is not complete, and the residue after peeling needs to be further cleaned, which also hinders the application of pressure-sensitive adhesives