Process for preparing high water-containing elastomer medical catheter
AssigneeChin Rehabilitation Research Center
InventorsLijiang Mao, Yuanjie Hu, Dongxu Piao
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Abstract
The present invention provides a process for preparing a high water-containing elastomer medical catheter and a urinary catheter prepared by the process. The process is carried out by a) heating a mixture consisting of polyvinyl alcohol, water, sulfoxide and linear alkane, in a sealed vessel with agitating; b) pouring the resulting homogeneous fluid into a mould; c) solidifying the fluid by cooling; d) releasing the solidified fluid from the mould; and e) heat-treating the resulting medical catheter and washing with a polar organic solvent. The medical catheter and the urinary catheter of the present invention have excellent lubricity.
Claims13
A process for preparing a high water-containing elstomer medical catheter comprising the steps of:
- a) heating a mixture consisting of 20-40 wt % of polyvinyl alcohol, 40-60 wt % of water, 7-15 wt % of sulfoxide having the following general formula
- R.sub.1 --SO--R.sub.2
- wherein R.sub.1 and R.sub.2 individually represent alkyl containing 1-3 carbon atoms, and 2-10 wt % of linear alkane containing 10-55 carbon atoms, based on the total weight of the mixture in a sealed vessel with agitation to form a homogeneous fluid;
- b) pouring said homogeneous fluid into a mould having a desired shape;
- c) solidifying said homogeneous fluid in the mould by cooling;
- d) releasing the solidified fluid from the mould to form a medical catheter;
- and
- e) heat-treating the medical catheter from step d) and washing it with a polar organic solvent to remove sulfoxide.
Dependencies are inferred from the claim text.