SU717084A1 - Composition for producing hard porous polyurethan - Google Patents

Description

(54) COMPOSITION FOR OBTAINING HARD POLYURETHANE FOAM

The invention relates to the field of the production of rigid polyurethane foams used for thermal insulation and fixing in the refrigeration industry, auto-, SUD, instrument-making / and other industrial fields. The known composition for the preparation of rigid polyurethane foam is polypropylene triol, a catalyst for foam formation, a polysiloxanalkylene block copolymer, solidification catalysts — tin octate, tin dibutyldyl urea, triethylenediamine, foam, freon polyurethane, water, polyurethane diamine, trienyldiamine, foam, freon polyurethane, tin, dibutylacetate, tin, triethylenediamine, foaming agent, freon polyurethane, tin, water, and dehydrated polyurethane; The disadvantages of the known composition are the high reactivity, toxicity, complexity of the raw materials used, as well as the high cost of organotin compounds. The closest to the technical essence is a composition comprising a simple hydroxyl-chloro-containing polyester, N-tetraoxypropylene diamine, a polyisocyanate, a foam stabilizer, freon, water, a curing catalyst 2,. The disadvantages of this composition is the low viability of the polyurethane high toxicity of amine catalysts used in the preparation of rigid polyurethane foam. The purpose of this 1H3b is to increase the viability and reduce the toxicity of the composition and to improve the strength characteristics of the final product. This goal is achieved by the fact that, as a curing catalyst, the composite contains Oo-amino-U5-phenylpropionic acid at the following ratio of components, parts by weight: Simple hydroxyl-chloro-containing polyether 70-80 N-tetraoxypropylene diamine 20-30 Polyisocyanate 170-180 Anticoagulant 1 , 3-1.8 Freon 25-35 Water 0.5-1.0 Ps-amino-1-phenylpropionic acid 1-4. The components of the composition have the following characteristics; Simple hydroxyl-chloro-containing polyether (Laprol-503M) is the product of the interaction of chloral with a simple polyester DT-500 (TU-78-67). N tetraoxypropylene namine (Lapromol 294) is the product of the reaction of hydroxypropylene with an aqueous solution of ethylene diamine (TU-6-05-1651-74). Penostra bilizator (CEP-1) is a block polymer of polyorganosiloxane and polyoxyalkylene (TU-2-02-781-73). Freon-I fluorotrichloromethane - foaming agent TU-b-02-727-75). The polyisocyanate mar B contains 58.5% of di-isocyanate diphenyl methane, 31.4% of isocyanate groups and 0.0220%. phenyl isocyanate. Amin-uz-phenyl-propionic acid (D - / - phenyl-o-alanine), which contains reactive amine groups and carboxyl, was used as a catalyst. This is a light yellow powder, the heat of fusion is 318-320 ° C, the molecular weight is 165.2, the amino-phenylpropionic cyblot has the following chemical structure; Cn-Cng-Cn Cn NH2 Example I. 70 parts by weight are weighed into a plastic cup. Laprol 503 M, 30 weight.h. Lapromola-294, 1, parts by weight CEP-1, 0.5 weight.h. water, 25 weight.h. freon-11, 1 weight.h. Phenyl-oi-alanine. The whole mass is transferred using a mechanical stirrer for 2-3 minutes to form a homogeneous polyester mixture. 170 parts by weight are then added. polyisocyanate, the whole mass is stirred for 30 s and poured into a mold where foaming of polyurethane foams occurs and their release. The induction time is 120 s, and the time of lifting and tacking of foam 320-330 s. Example 2. The procedure is carried out analogously to Example 1, but with the following ratio of Components, weight Laprol-503 M 75 Lapromol-29425 CEP-. 1.5 Freon-1130 Voda 0.75 V-uv-phenyl-o-alanine 2 B175 brand polyisocyanate. Induction time 170 sec., -The time of lifting the tack-off foam 360-370 sec. EXAMPLE 3: Realization; is analogous to Example 1 with the following ratio of components, parts by weight; Laprol-503 M80 Lapromol-29420 CEP-11.8 Freon-11 - 35 Water1, O D-ji-phenyl-l-alanine 3 B180 brand polyisocyanate, induction time: 175 s, tack-off time, foam recovery 390 s. EXAMPLE 4: This is carried out taxically as in Example 1 with the following ratio of components, parts by weight; Laprol-504 M80 Lapromol-29420 CEP-11.8 Freon-1135 Voda1, OO-uv-phenyl- {-alanine 4 B grade polyisocyanate 180 Induction time 80 s, rise and tack-off time of foam for 315-320 s. As shown in Table 1, it can be seen that the viability of the foam increases by 3–4 times as compared with the prototype, the time of raising the foam by 4–5 times and the time of tacking off the foam by 3 times. The use of the proposed catalyst allows the toxic volatile amine and organotin to be removed from the mass, which will greatly reduce the toxicity of the foam and, to some extent, reduce the cost of the final product. 0-uv-phenyl-g-alanine is a chemically active substance that reacts with both a polyester mixture and a polyisocyanate, which, in turn, forms a three-dimensional cross-linked structure with good mechanical strength. The results of physical and mechanical measurements are given in Table 2. As can be seen from the data of table 2, rigid polyurethane foam, obtained from the proposed mass, has higher strength properties. The resulting foam has a fine-pore-closed structure. With the same maximum density with the prototype, the compressive strength is 2.9 times higher than that of the prototype, and with the minimum density it remains at the level of the prototype. The reaction rate and gelation end at the same time. High strength properties confirm that B-Y5-phenyl-L-alanine entering into chemical interaction with polyesters and polyisocyanate. The foam has a slight shrinkage. In addition to the catalytic properties of the proposed catalyst has a stabilizing effect.

The dependence of the induction time, lifting and tack-free foam of the proposed mass and prototype

Physico-mechanical properties of the proposed

Table

Tavlitsa2 foam and prototype

Claims (2)

. SUMMARY OF THE INVENTION A composition for producing rigid polyurethane foam including a simple hydroxylchlorinated polyester, N '- tetraoxypropylenediamine, polyisocyanate, foam stabilizer, freon, water, a curing catalyst, characterized in that, in order to increase the viability and reduce the toxicity of the composition and improve the strength characteristics of the final product, as a curing catalyst, it contains BS <-amino- / 3-phenylpr'opionic acid in the following ratio of components, parts by weight:. . , Simple hydroxychlorinated polyester 70-80 N-tetraoxypropylene diamine 20-3JJ Polyisocyanate 170-180 Foam stabilizer 1.3-1.8 45 - Freon 25-35 Water 0- ° <-amino - /> - phenyl- 0.5-1.0 propionic acid 1-4 that one. fifty Sources of information, taken into account when expertise 1. USSR copyright certificate No. 3124250, class From 08 G 18/14, 55 1964. 2. Vakhtin V.G., Turkish L, G. • ¹ Filling polyurethane foam of improved design ”,“ '' Plastics ”, 1974, No. 10, pp. 51-52 (pro * ° Type). TSNIIIPI Order 9754/30 Draw 549 Subscription PPP Branch Patent ’’ Uzhhorod, st. Project, 4