CS200024B1 - Process for producing an unsaturated polyester resin solution - Google Patents

Abstract

The invention relates to a method for producing a solution of unsaturated polyester resin, suitable in particular for the preparation of transparent laminated roofing β with high light transmittance, which enables continuous production even at higher temperature conditions while ensuring the required quality parameters* of the final product. The essence of the invention is that propylene glycol-1,2, a part containing at least one ether oxygen group, is polyesterified, the polyesterification being terminated after reaching the polyester acid number of 35 to 45 mg KOH/g and then styrene and methylene acrylate are added to the resulting reaction mixture, usually after partial cooling, in an amount corresponding to 1.7 - 0.2 and 0.2 and 0.07 mol, respectively, calculated per 1 mol of maleic anhydride used.

Description

SUMMARY OF THE INVENTION The present invention relates to a process for the production of a solution of unsaturated polyosteric bile suitable for the preparation of a transparent laminated lintel covering with high light transmittance, which allows continuous production even under temperature variations whilst ensuring the required qualities of the final product.

It is known that the properties of unsaturated polyester elements are not only the composition and type of polyester produced, but also the amount and type of reactive monomer used, which is most often styrene, nylmethacrylate, diallyl phthalate, vinyltoluene, acrylonitrile, vinyl acetate. The raw materials used, both in terms of quality and quantity, not only affect the properties of the final product, but also affect the physical quantities such as the hem index, which is decisive for light transmittance by Sinitel in terms of light transmittance. . It is difficult to reconcile the required physico-chemical properties as well as other physical quantities by respecting the requirements of the application technology, although it knows in advance how the different types of starting raw materials affect a quantity. Thus, it is known, for example, that the refractive index of unsaturated polyester elements ea varies slightly with the increasing length of the mole molecule, but it is much more dependent on the substitution of the mole used, in particular alpha-carbon substitution. In the case of unsaturated polyester, the structure is saturated with a modifying acid, whereas aliphatic acids refine the unsaturated polyester element, while aromatic saturated dicarbenic acids increase the refractive index. For example, use of itaconic acid islands for the preparation of bituminous mixtures is based on the use of itaconic acid islands. The effect of styrene on the refractive index of polyester is insignificant, which is decisive for a given unsaturated polyether ether resin composition. % conoentráois methyl methacrylate to which 20 to 60 wt. (v. British, U.S. Pat. No. 1,012,184). From the point of view of processing, it is important that the reactive monomer used has the lowest vapor pressure so that the monomer losses by evaporation of the bell, even at elevated temperatures, are as low as possible and do not substantially affect the curing properties of the polyester. refractive index values have a significant impact on, for example, bulk freeze-thaw after curing and the like.

For practical application, in addition to the starting raw materials, the polyester formulations also relate to both the type of reactive monomer used and the amount thereof, which is due to the fact that the hem index will increase after curing.

«·«

In accordance with the process of the present invention, ea produces a unsaturated Pelyester resin resin, especially suitable for the continuous production of high-transmissivity transparent laminates, from parts and dicarboxylic acids and / or anhydrides, wherein at least one acid and / or anhydride thereof is unsaturated, polysstyrified at elevated temperatures. and, as a rule, and in the presence of a pome polymer, such that the polyester is flushed with propylene glycol-1,2, the parts containing at least an iodine etheric oxygen bridge, preferably dlprepylene glycol, phthalic anhydride and malelmanhydride in a molar ratio of (1,1,1,2) j (,8,8) 0.2 µm (0.7 t 0.2) ii, wherein the polyester / polyester and ticks after the acid number of the polyester is 35 to 45 mg / KOH / g, preferably 38 to 42 mg / KOH / g and then to the flame retardant. The reaction anesthesia, the rules of cooling and cooling, add styrene and methylmotycrylate in an amount corresponding to that required. 0, 2 and 0.2 and 0.07 mol, respectively, calculated per 1 mol of maleic anhydride used.

In the process according to the invention, commercially available commercially available substances which are relatively economically undemanding are used for the preparation of the polyester themselves, and the physical properties, including the refractive index, the final product produced and the copolymer reacted with the solvents used, are predetermined by narrow definitions of relative molar ratios. Polyester phosphates can also be carried out without a polyester flux catalyst when homogeneous starting materials in the melt are sufficient to produce the polyester. However, it is also possible to carry out the polyester phosphate in the presence of solvents, the choice of which is expedient to carry with the reaction water in the form of an azeotrope, and after separation of the phases, the organlocase phase of the condensate can be recycled as necessary. This process is particularly suitable when acids are used instead of acid anhydride, and in these cases it is necessary from the viewpoint of technology to add an esterflication catalyst to the reaction apparatus. The choice of the raw materials is realized in such a way that conventional types of equipment can be used for the polyosteric, but also commonly used and well-known solvents such as xylene and polyester as well as the catalyst. množetiev. The temperature of the polyester / polyester is dependent, on the one hand, whether or not it flows with a solvent whose boiling point and water practically determine the temperature of the polyester / polyester. The prooes are conducted in an inert atmosphere, and the apparatus must be purged with inert gas prior to heating the feedstock. The polyester ester is terminated to obtain a polyester acid number of 35-45 mg KOH / g, preferably 38-42 mg KOH / g.

Upon completion of the polyosterifiable and, if the solvent is distilled off, styrene and methyl methacrylate are added as reactive solvents to the reaction mixture in amounts corresponding to 1.7-0.2 and 0.2-0.07 moles, calculated per mall of malelnaahydride used. Said reactive solvents are already added with a stabilizer or other additives to improve the storage properties of the system. The temperature of addition of the reactive solvents ea is chosen so that the polyester is still in the molten state, but the temperature is as low as possible.

Prior to application and to the apparatus, the initiation system adds in conventional amounts and other auxiliaries such as dyes and the like. The composition thus prepared can also be applied in continuous lines to produce laqiln roofing, while the hardening of the curing corresponds to the technological conditions of continuous production.

Among the main advantages of the process according to the invention, it is necessary to include the fact that the process utilizes commercially available convenience raw materials, while the economic difficulty is relatively low. From the point of view of the technological equipment and to the illogical process of the process, both polyesteriflucoo and apllkáoio navyboúujo of divine. On the one hand, the refractive index has been adjusted to the desired value and, on the other hand, the low conoanthrate of methyl methacrylate reduces its steam pressure, allowing curing to continuous temperatures where the temperature is used.

Example 1

A mixture of 773 kg of propylene glycol-1,2, 1030 kg of propylene glycol, 1030 kg of phthalic anhydride and 900 kg of butyric acid hydride is mixed in an inert atmosphere at a temperature of 150 DEG-21 DEG C. to a polyacrylate acid value of 42.5 mg (KOH). g. The reaction mixture is then cooled to 175 DEG C. and 0.34 kg of hydroquinone are added and, after cooling to 95 DEG-105 DEG ^C., 1676 kg of breast polyesters before the styrene is tabulated. At a temperature of 50-60 ° C, 235 kg of stabilized methyl methacrylate and 10 kg of a light etabillizer (Cyasorb) are added. The mixture is perfectly homogenized and cooled to 25 ° C. 5 kg of unsaturated polyester element having a refractive index before curing of n * 1.524 are obtained.

D

Example 2

A mixture of 160 g of propylene glycol, 120 g of monopropylene glycol, 140 g of maleic anhydride, and 160 g of tert-butyl hydride was stirred under an inert atmosphere until the reaction temperature was 220 [deg.] C. under displacement with an aortic gas. The perturbation of sieving is in addition to avoiding the loss of a and glycolooh. After the cyeloeth of the macrocyanate has reached 43 mg KOH / g and cooled to 175 ° C, 0.04 g of hydroehion is added at a temperature of 95 to 105 280 g of styrene. Hetyl methacrylate in amounts of 38.77 g and 1.6 g of Tinuvin P (luminous

The stabilizer was added at 60 ° C. The prepared polyester nutrient (862 g) has a mesh properties.

n ²⁰ liquid element D

Color (ČSN 67 3011) Acid number Suit

Viscosity at 20 ° C 20 n after curing D

1.524 1 «β J ₂

27.5 mg KOH / g 62.8 wt. 313.8 mPas

1,548

Example 3

277.47 kg of propylene-1.2, 165.95 kg of tnaleic acid anhydride and 251.06 to phthalic acid ane, and under inert atmosphere and with stirring, esterify at 165 to 200 ° C to an acidity of 48 to 52 mg KOH / g with stirring. . 0.14 kg of hydroquinone, 0.34 kg of paraffin are added at 175 ° C and 254.6 kg of styrene at 105 ° C.

115.4 kg of methyl methacrylate and 1.92 to a light stabilizer (e.g. 2-hydroxy-4-methoxybenzophenone) are added at a temperature of 50-55 ° C. The above procedure is prepared

000 kg of nutrient with refractive index η ² θ (liquid) with 1,524 - 0,0005 and viscosity at 20 ° CD

330 mPas.

Claims (3)

OBJECT OF THE INVENTION A process for producing a solution of an unsaturated polyester resin in reactive monomers, particularly suitable for the continuous production of transparent laminates and high light transmittance, from diols and dicarboxylic acids and / or anhydrides, wherein at least one acid and / or its anhydride is unsaturated, temperatures and rules in the presence of anionic substances, characterized in that propylene glycol-1,2 is polyesterified, the diol containing at least one ethereal oxygen bridge, preferably dipropylene glycol, phthalic anhydride and maleic anhydride in a molar ratio (1,1-1,2): (0.8-0.2): (0.7-0.2): 1, at which time the polyesterification e and, after reaching the polyester acidity peak, 35-45 mg KOH / g, preferably 38-42 mg KOH / g, and then styrene and methyl methacrylate are added to the resulting reaction mixture, generally after partial cooling, in amounts corresponding to 1.7-0.2 and 0.2-0.07 mol, calculated per 1 mol. of maleic anhydride used. 2. The method of claim 1, wherein:. The polyester is carried out in the presence of a water entrainer in the form of an azeotrope. 3. A process according to claim 1 or 2, wherein the reaction is carried out in the presence of an esterification catalyst.