SU61904A1 - Method of making polymethylmecacrylate solutions for varnish coatings - Google Patents

Description

It is known to reduce the viscosity of high polymer solutions by the addition of low viscosity resins. It is also known to reduce the viscosity of these solutions by selecting a mixture of appropriate solvents and diluents. However, the known methods do not provide significant practical effect.

The proposed method of making solutions of polymethyl methacrylate DOT of lacquer coatings differs from the known ones in that polymethyl methacrylate is rolled together with fillers, pigments, dyes and plasticizers or without them, the resulting material is ground into powder and dissolved in appropriate solvents.

The described method is carried out as follows: swelling 111 3 of organic solvents or non-swelling polymers in the form of powder, pieces, scraps, shavings and other waste or full-fledged products are rolled on differential rollers at different temperatures with the introduction of fillers, pigments, dyes, plasticizers or without them for 3-90 minutes ,

The resulting n-ist of fragile material is subjected to grinding in ball mills with screenings of 2000-700 Uv / cm through sieves.

The sifted powder is dissolved in organic solvents 3 ratio: 1 in the case of long-term processing on rollers and in a ratio of 1: 5 during short-term processing.

Dissolution is carried out in apparatus with medium power broom. Plasticizers and diluents may be added during the dissolution.

The solutions obtained in this way are applied to various surfaces by the usual methods for varnishes.

.№ 61904

The resulting films with the appropriate preparation of coated surfaces adhere strongly, have high mechanical resistance, elasticity and hardness (depending on the amount of plasticizer used) and can have different colors from white (or colorless) to a wide variety of colors.

EXAMPLE

I. 1 c. h. polymethyl methacrylate is poured with toluene or benzene, taken in an amount of 1 vol. The swelling takes place in a tightly closed vessel for 10 hours, resulting in the swollen polymer being rolled from 1 in. including aluminum hydroxide, or any other filler, 0.2 vol. including tricresyl phosphate and 0.04 B. h. azure for 3-15 minutes. at a temperature of 100-110 ° C. The rolled material is ground in a ball mill, sieved through a 4000-7000 ore / cAft sieve and dissolved in a mixture of toluene and ethyl alcohol (80% toluene and 20% ethanol) at a ratio of 1 in. including powder 5-6 in. including solvent, with the introduction of 0.3 in. including plasticizer (tricresyl phosphate, dibutyl phthalate, oxydiphenyl, Savol, etc.) or without it.

I. 1.5 c. h. polymethyl methacrylate, swollen in ethyladetate (1: 1) for 1 hour, is subjected to rolling from 1-1.5 in. h. lithop on or another pigment, 0.2 c. including plasticizer and 0.05 in. h. lemon crown for 10-14 minutes, at a temperature of 110 ° -125 ° C. Further process is the same as in example I.

The ratio of components, the duration and the temperature of rolling can vary widely, depending on the desired properties, and make a varnish. Phthalates, phosphates, oxyphenyls, phenols, chlorinated hydrocarbons, waxes, esters, salts of fatty acids, etc. can be used as plasticizers, as well as aliphatic and hydrocarbons as solvents. aromatic alcohols and ethers.

Subject invention

Claims (2)

1. A method of making polymethyl methacrylate solutions for lacquer coatings, characterized in that polymethylmethacrylate is rolled together with make-up agents, pigments, dyes and plasticizers or without them, the obtained material is crushed into powder and dissolved in the corresponding solvents. 2. A method according to claim 1, wherein it is iolimethyl methacrylate that before milling is subjected to swelling in organic solvents.