Method for production of polymer composition

FIELD: building materials, in particular polymer composition for sealing adhesive, coats, filling floors, etc.

SUBSTANCE: method includes blending at pH 7.5-13.0 of inorganic powder, water and technological additives: polymethylsiloxane, dioctylphtalate, chloroparaffin, followed by addition of polyisocyanate oligomer comprising 1.9-8.9 mass % of isocyanate groups. Method makes it possible to create fastness mode for carbolinic acid and its involvement in chain-elongation reaction without releasing of carbon dioxide.

EFFECT: composition of increased strength, flexibility and alternated characteristics.

4 ex

 

The invention relates to the production of polymer compositions and can be used in the manufacture of flooring, seamless waterproofing layers, adhesive compositions with maximum sealing properties, as well as construction, manufacturing materials for protection of underground and surface heat pipes, and other structures from heat loss, corrosion and corrosive environments.

A known method of manufacturing a polymeric insulation mixture of MDI, diethylene glycol, dimethylketone, mineral filler, triethanolamine and silicone fluids. When the complexity of the composition of the curing time such songs are quite large (2-3 hours). (USSR author's certificate No. 695985, IPC: 04 26/18, 1977).

A known method of manufacturing a polymeric insulation with surface hardened layer in which the components are introduced in the sequence of the polyisocyanate with diethylene glycol, mineral filler is injected and polystyrene granules, and then triethanolamine and silicone fluid. The regulation of the mixing is a fairly hard time. The combination of diethylene glycol with a polyisocyanate starts the formation of the polyurethane foam and limit all subsequent operations of the casting composition. In EMA curing polymer insulation slightly less than in the above-described method and is 30-40 minutes (USSR Author's certificate No. 1392049, IPC: 04 26/18, 1985).

In each case, the manufacture of polymeric materials have to solve the optimization problem of technological regime to ensure the required performance characteristics of the product. Along with this overall objective also aims to increase productivity by reducing the molding cycle, but rather by reducing the curing time and casting compositions.

Known methods for producing oligomeric polisanov in the environment of primary amines hydrocodoneusa monomers and oligomers such as ethylene glycol, diethylene glycol, oligoesters (ethylene oxide, propylene oxide). (Encyclopedia of polymers, Polyurethanes, M., 1976).

The disadvantages of these methods is using to change the curing time is harmful to human health and the environment of substances, obtaining foamed polymer compositions, the increased hardness of the compositions.

The closest method of making polymer compositions is a mixture of mineral powder, water and additives, followed by combining the resulting mixture with the oligomeric poliitikata at ambient temperature. In this way the received radiation resistant coating described in the Certificate of Russian is coy Federation for useful model No. 25030 casual, IPC: E 04 F 15/12, published. 2002 (prototype).

Usually isocyanate, reacting with water to generate unstable carolinabuy acid, which is decomposed into a primary amine and carbon dioxide. Carbon dioxide spanaway polymer composition. If karbainova acid to be sustainable, it will be able to participate in the extension reaction of a polymer chain without carbon dioxide, which will provide polymeric compositions with modified physicochemical properties: elasticity, strength, etc.

Sustainability karbaminovoi acid can be obtained while maintaining in the process of obtaining polymeric composition of pH in the environment within 7.5 to 13.0.

The technical result of the invention is to increase strength, increase flexibility and change settings curing polymer compositions: adhesion, spreading, etc.

The technical result is achieved in that in the method of manufacturing a polymeric composition consisting of a mixture of mineral powder, additives and water, and then combining the resulting mixture with the oligomeric isocyanates with the content of isocyanate groups of 1.9 to 8.9 wt.%, in the mixture of mineral powder with water and process additives maintain the pH in the range from 7.5 to 13.0, as technological additives used in isout polymethylsiloxane, the dioctylphthalate, chloroparaffin and components taken in the following ratio, wt.%:

oligomeric polyisocyanate content

isocyanate groups of 1.9 to 8.9 wt.% 30,0-60,0

water 7,0-25,0

polymethylsiloxane 2,0-5,0

the dioctylphthalate 1,5-3,0

chloroparaffin 1,5-3,0

mineral powder the rest

As oligomeric MDI use different prepolymers - oligomerisation obtained by the interaction of the isocyanate component (toluylenediisocyanate, polyisocyanates grades a and B, and others) with oligopyrroles (simple and complex), such as various Laprol containing residual isocyanate end groups in the number of 1.9 to 8.9 wt.%, for example, the prepolymer is a urethane component Germoplasm OP-1”.

As mineral powders using various mineral fillers such as talc, bentonite, titanium dioxide, lime [CA(Oh)2] and others, depending on the specific purpose of the use of polymeric compositions as adhesives, sealants, coatings, construction products).

As polymethylsiloxane use different polymethylsiloxane (silicone) fluid, such as PMS - 200.

The possibility of implementing the method shown in the examples of specific performance.

Example 1. For the manufacture of coatings used oligomeric polyisocyanate soderzhanie isocynate groups of 1.9% was taken in the amount of 30 wt.%, water in the amount of 7%, dioctylphthalate in the amount of 1.5%, chloroparaffin in the amount of 3%, polymethylsiloxane at 2%, mineral powder consisting of compounds of divalent metals, rest.

The mixture and the resulting polymer material is characterized by the following parameters: pH of aqueous extract of 7.5, loss of yield of 5.5 h, the hardness of the obtained film thickness of 2 mm during curing of a mixture of 35 shore, the relative strength of 0.6 MPa, an elongation at break of 400%.

Example 2. For the manufacture of coatings used oligomeric polyisocyanate content isocynate groups 5% was taken in the amount of 40 wt.%, water in the amount of 12%, dioctylphthalate in the amount of 2.0%, chloroparaffin in the amount of 2.5%, polymethylsiloxane PMS - 200 in the amount of 3.0%, mineral powder powder lime [CA(Oh)2] - else.

The mixture and the resulting polymer material is characterized by the following parameters: pH of aqueous extract - 9,0, loss of yield of 4.5 h, the hardness of the obtained film thickness of 2 mm during curing of a mixture of 50 shore, the relative strength of 3.5 MPa, an elongation at break of 450%.

Example 3. For the manufacture of coatings used oligomeric polyisocyanate content isocynate groups of 7.4% was taken in an amount of 50 wt.%, water in the amount of 20%, dioctylphthalate in the amount of 2.5%, chloroparaffin in the amount of 2.0%, poly is etisalats PMS - 200 in the amount of 4.0%, mineral powder powder lime [CA(Oh)2] - else.

The mixture and the resulting polymer material is characterized by the following parameters: pH of aqueous extract - 11.0, loss of fluidity to 3.0 h, the hardness of the obtained film thickness of 2 mm during curing of a mixture of 60 shore, the relative strength of 4.0 MPa, an elongation at break of 600%.

Example 4. For the manufacture of coatings used oligomeric polyisocyanate content isocynate groups of 8.9% was taken in the amount of 60 wt.%, water in the amount of 25.0%, dioctylphthalate in the amount of 3.0%, chloroparaffin in the amount of 1.5%, polymethylsiloxane PMS - 200 5,0%, mineral powder powder lime [CA(Oh)2] - else.

The mixture and the resulting polymer material is characterized by the following parameters: pH of aqueous extract - 13,0, loss of fluidity - 2.5 h, the hardness of the obtained film thickness of 2 mm during curing of a mixture of 70 shore, conventional strength - 9,0 MPa, elongation at break - 850%.

Entering in the composition of additives additional target additives, for example, to increase the hardness of glass balls with a diameter of 70-50 μm or quartz sand of different granulometric composition, to increase elasticity and improve time loss of fluidity (the viability of the mixture), you can enter hygroscopic substances such obasogie the aqueous glycerol, you can change the physico-mechanical properties of the polymeric solid material in a wide range.

A method of manufacturing a polymeric composition consisting of a mixture of mineral powder, additives and water, followed by combining the resulting mixture with the oligomeric isocyanate content of isocyanate groups of 1.9 to 8.9 wt.%, in the mixture of mineral powder with water and process additives maintain the pH in the range from 7.5 to 13.0, as technological additives used polymethylsiloxane, dioctylphthalate, chloroparaffin and components taken in the following ratio, wt.%:

Oligomeric polyisocyanate content

isocyanate groups of 1.9 to 8.9 wt.% 30,0-60,0

Water 7,0-25,0

Polymethylsiloxane 2,0-5,0

The dioctylphthalate 1,5-3,0

Chloroparaffin 1,5-3,0

Mineral powder the Rest



 

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