CH228438A - Method of manufacturing a paint. - Google Patents

Description

  

  Process for producing a paint. The subject of the invention is a process for the production of a paint containing a product made from rubber as a binder.



  Rubber is used to an increasing extent in the paint and varnish industry, not all of it: such, but in a modified form .. The most important product is chlorinated rubber, while conventional rubber is less used.



  In dissolved form, after evaporation of the solvent, rubber produces a film that is of little importance from the point of view of paint technology.



  It has now been found that a reaction product: of optionally plasticized, depolymerized, m rubber, with polyearboxylic acids which contain an actsvet double bond, such as maleic acid or its;

          Anhydride, aconitic acid, itaconic acid, etc., which was then esterified with a polyalcohol such as glycerol, sorbitol, mannitol, pentaerythritol, polyglycerol or an already partially esterified polyalcohol, as:

          Binding agent # l is used for lacquers and paints who can give them very favorable properties.



  The rubber can be depolymerized in the manner customary in the rubber industry, by rolling until the desired consistency is achieved, or by adding suitable substances to a rubber solution.

   Metal compounds, such as the cobalt compounds of linseed oil fatty acid, resin acid or naphthenic acid, are used as oleic substances. Corresponding lead, copper or manganese genes and days,

      or or- v -bindun egg ganic peroxides, such as benzoyl peroside, into consideration.



       The esterification is best carried out in the presence of one or more of the following substances: a) Vegetable or animal fats or oils, in particular other drying or semi-drying oils, such as linseed oil, soybean oil, wood oil, oitia oil, Tran, perilla oil, synouryn oil (dehydrated castor oil) or their stand oils;

    <I> b) </I> fatty acids of the oils mentioned under <I> a) </I>, thus resin acid (rosin or otherwise: molten copal) and t'a.ll oil; e) Starting materials for the production of alkyd resins or modified alkyd resins, for example a mixed glyceride of phthalic acid and linseed oil fatty acid or other fatty acids or resin acids;

         d) Synthetic resins containing esters, for example a phenolformnald @ e-hydha @ rz modified with rosin ester.



  The products formed show laek- technise: h surprisingly good properties. Drying is fast, without sticking, the films are hard and yet elastic, and the water resistance is high.



  The following examples explain the manufacture of the binders to be used according to the invention and the paints made from them.



       Examples: 1. Plasticized rubber is dissolved in white spirit and heated to 100 ° C. for 24 hours with 5% benzoyl peroxide and 20% maleic acid anhydride (calculated on the amount of rubber). Then the calculated amount of glycerol is added and below Stirring continued to heat until the mineral spirits distilled.

   So much white spirit is distilled off until the residue, after cooling, has a viscosity of 2 poises. Now as much as 1, titanium white is added that a breathable color can arise and the mixture is ground in a ball mill.

   The product dries to a non-sticky film in about 30 minutes, which exhibits good adhesion, elasticity and water resistance.



  2. Before the esterification with glycerol: is carried out, a product according to Example 1 is mixed with linseed oil in a ratio of one part of chewing oil to 4 parts of linseed oil. Instead of le_nöl stand oil. Synouryns: tandöl or a mixture of linseed oil stand oil with Holzölata.ndöl can be used.



  After the oil has been added, the esterification is carried out in the manner indicated in Example 1, that is to say as much as 1 liter of mineral spirits is distilled off until the residue, after cooling, shows the consistency of a normal paint. The residue is siccativated with so much cobalt naphtenate that the non-volatile substance is calculated. 0.05% cobali metal is present.

   Pigments would now be added and: the mixture would be ground.



  The products dry within 6 hours to form a film which is tack-free and hard again after 6 hours and shows good resistance to scratches.



  3. Rubber will. in Sol.ventnapht: a dissolved and after @ u @, but with a little cobalt naphtena.t: it is heated to 80 C for 6 hours. Then <B> 30% </B> Akonitsä.uTe (added to the rubber) are added and the mixture is further heated to 80 C for 48 hours while stirring.

   Then a synthetic resin modified with linseed oil is added, which is composed of 10% fatty acid glyceride and <B> 30% </B> phthalic acid glyceride. The amount of alkyd resin can change between 2-6 parts to 1 part rubber.



       That. The mixture is processed further as described in Example 2.



  The product has a film of high elasticity and resistance to Z @ Tass. The water resistance and hardness can be increased by stoving the film to 11.0 C% for one hour. The elasticity suffers only a little.

 

Claims (1)

PATEN TiiNSPRL CII Process for the production of a coating agent, characterized in that a product is used as a binding agent which was obtained by reacting depol.ymerized rubber with polycarbonate acids which contain an active double bond, .Or their anhydrilles and, esterification of the resulting product with polyalcohols. SUBClaims: 1. Method according to claim, characterized in that one has a binding agent. used. that: was esterified in the presence of fatty acids. 2. Process according to claim, characterized by the fact that a binding agent is used, that 9 has been esterified in the presence of resin acids. 3. The method according to claim, characterized in that a binding agent is used which has been esterified in the presence of vegetable oils. 4th Process according to claim, characterized in that a binding agent is used which has been fermented in the presence of vegetable fats. 5. The method according to claim, characterized in that @ that @ one uses a binder that has been esterified in the presence of animal oils. 6th Process according to claim, characterized in that a binding agent is used which has been esterified in the presence of animal fats. 7. The method according to PatentanSpTuch, characterized in that one. a binder is used which has been esterified in the presence of I-larzites. B. A method according to patent claim, characterized in that 4a3 a binding agent is used which was obtained in such a way that the Veres, terun.g was carried out with an already partially esterified polyalcohol. 9. Method according to claim, d'a- di_L, rch characterized in that one. a binding agent is used that has been esterified in the presence of starting materials for the production of alkyd resin. 10. The method according to patent claim, characterized in that a binder is used which: was esterified in the presence of alkyd resin.