SU1214693A1 - Hardening polymer-monomer composition - Google Patents

Description

 one

The invention relates to the synthesis of polymeric materials, in particular to curing polymer-monomeric compositions based on polyvinyl alcohol, and can be used in chemical industry, and compositions - for the manufacture of optical thin-walled products, in particular, soft hydrogel contact lenses used in medicine.

The aim of the invention is to simplify the manufacturing technology of the composition of products and increase their tensile strength, while maintaining high water content.

An example. To obtain a composition of 7.47 g (P, 0b%) of polyvinyl alcohol is dissolved in 57.53 g-sh (85.2%) water, an 11.5% aqueous solution of polyvinyl alcohol is obtained. In the resulting solution is added 1.99 g (2.96%) glycidyl methacrylate, 0.5 g (0.75%) ethylene glycol monomethacrylate, 0.01 g (O., 0i5%) aluminum chloride (ABCCj), and 0.0} g ( 0,015%) isopropylbenzene hydroperoxide (gperperys).

From the finished composition, a film is obtained by casting it onto a substrate and then sising it at room temperature for 2 days or for 3 hours. The hardening of the resin is carried out for J hours.

The cured film is transparent (transparency up to 96%). It is characterized by high water content (58%), non-toxicity 3 by high elasticity (elongation at break in the dry state is 580%, in the swollen state - 500%) and strength (the limiting strength of the wife is 4.2 kg / mm in the dry state and 1.5 kg / mm in the swollen state), retains its properties after boiling in water, it is distinguished by its resistance in weakly acid and weakly alkaline media.

Example 2, the Composition is similar to Example 5, mixing the components in the following ratios, g: polrshinyl alcohol 7.02 (10.8%) |,

water, 54.2 (83.38%); hlc5dilmetme-acrylate 2.79 (4.286%); ethylene glycol mono-methacrylate 0.98 (i, 5% l; rmteris 0.011 (0.017%); forest, 0.011 (0.017%).

From the prepared composition, a film is prepared as in Example 1 146932

The curing of the film is carried out at 1.5 hours. The final material is characterized by high water content (50-52%, elasticity (relative elongation at rupture in the dry state is 175%, in the swollen state - 500%), strength ( tensile strength in dry state 4.3 kg / mm and 1.55 kg / mm in 10 swollen state), transparency (transparency up to 96%), non-toxicity, retains its properties after boiling in water, racks in subacid and weakly alkaline media

Ifi

Example 3. The composition was prepared as in example 1, mixing the components in the following ratio, g: polyvinyl alcohol 7.28 (11.2%);

; ,,., water 55.9 (86%; glycidyl methacrylate 1.46 (2.25%); ethylene monomethacrylate-gljol 0.34 (0.524%); AbSb, 0.0085 (0.013%); hyperise 0.0085 (0.013%). From the prepared composition according to 25 films as in Example 1, the film was cured | At the software for 50 minutes. The semi-finished material retains its properties after boiling in water, racks in weakly acid and weakly alkaline media, characterized by high water content (57%, elasticity (relative elongation in a dry condition is 190%, in a swollen state - 500%), strength (tensile strength; when stretched in a dry The cdB state — at 4.01 kg / mm, in the swollen state — 1.22 kg / s), with a translucency of i (up to 96%), is non-toxic.

thirty

The material obtained from the proposed composition is distinguished by high Bodo content (50-58%), elasticity (relative elongation

with a dry condition of 175–190% 5 in the swollen state — 500% |, strength (tensile strength in the dry state 4.01– 4.j3 kg / mm 5 in the bulk – 1,221, 55), which represents the possibility of its use in medicine, B particularly for the manufacture of soft contact lenses.

Increased water content, elasticity and reduced toxicity provide improved tolerance of soft lenses on the eye.

Claims (1)

A CURABLE POLYMER-MONOMERIC COMPOSITION containing polyvinyl alcohol, ethylene glycol monomethacrylate, isopropylbenzene hydroperoxide and water, characterized in that, in order to simplify the manufacturing technology of the product composition and increase their tensile strength while maintaining 10.8-11.2 high water content, it additionally contains glycidylmsagacrylate and aluminum chloride in the following ratio, May.%: Polyvinyl alcohol Monomethacrylate e tylene glycol ol Propyl benzene hydroperoxide Glycidyl methacrylate 2.25-4.286 Aluminum chloride Water 0.524 -1.5 0.013-0.017 0.013-0.017 Else> ί