SU975761A1 - Film forming composition for making coatings - Google Patents

Description

The invention relates to the paint industry, namely to the film-forming materials used for the manufacture of paint coatings intended for interior and exterior work on various surfaces.

Known film-forming on the basis of vegetable oils with the addition of a desiccant and solvent, such as linseed oil oxol C1.

It is also known film-forming on the basis of vegetable oils in a mixture with modifying β-agents: low molecular weight rubbers, such as divinylpiperylene C 2 3.

However, the known film-forming agent does not have sufficient water resistance; bone and weather resistance with simultaneous consumption of a large amount of vegetable oil 50-80%.

It is also known film-forming, obtained on the basis of a mixture of (oxidized) vegetable oil and modifying agent (a mixture of 40-75 parts by weight of 10-40% solution in an organic solvent of high molecular weight synthetic kzoprenovogo rubber with mol. GZ300300 thousand and 20-50 weight divine piperille, new rubber and / or polydientov I3.

However, the known film-forming is obtained at an elevated temperature of 130-140 s, in addition, non-oxidized Macjio and rubber are used as starting components, which

10 is oxidized by air in the process of obtaining film-films, which generally complicates the process of its production.

15

Closest to the proposed technical entity is a KBM position for a coating, including synthetic isoprene rubber with a "mol. M. 150-300 thousand and plasticity 0.620 0.65, natural linseed oil (oxidized linseed oil, with viscosity 26-32 s for VZ-4 with addition of desiccant and solvent), desiccant and white spirit

(solvent). Based on the famous

25 compositions make paints by adding

I pigments-C4.

However, the known composition forms a matte coating with low resistance and weather resistance, which limits its use and reduces the service life of coatings. The aim of the invention is to reduce the drying time, increase the hardness, water resistance and atmosphere resistance of coatings. The goal is achieved by those. that the film-forming composition for the production of coatings, including synthetic isoprene rubber with mol. 150000-300000, oxidized vegetable oil, desiccant and organic solvent, as a plant oil contains vegetable oil oxidized to a viscosity of 40 to 50 s by VZ-4, with the following cooTHoBj Research Institute of Components, wt.%: Synthetic isoprene rubber mol.m.000000300000 Oxidized vegetable oil Desiccant Organic Remaining solvent Film-forming technology is as follows. Isoprene SKI-3 rubber is pre-crushed and dissolved in white spirit or xylene, the prescription amount of oxidized vegetable oil with viscosity 40- is added to the mixer with the rubber solution. 50 with on OT-4 and desiccant. The mixture is stirred until a homogeneous solution is obtained, after which the film-forming is produced on TYPE. The film-forming material of this composition possesses high physicomechanical properties, high water resistance and weather resistance with a small consumption of scarce expensive vegetable oil and not less deficient low molecular weight rubbers. In addition, the film-forming technology eliminates the need for co-heating and oxidation of vegetable oil with modifying agents. In this case, drying or semi-drying oils are used as vegetable oils, for example, sunflower, flax / soybean, tungogvoe, yutskoe or mixtures thereof. . The solvent used is xylene, white spirit, solvent; oil, melted lead manganese-cobalt or precipitated naphthenate are used as a desiccant. Examples 1-8. Production of film-forming with different ratio of 7 components. The results are presented in Table. 1. Table 1

8 12

10 b 10 5

Organic

77

72 solvent

In addition, reference examples are presented of formulations containing paq-0 oil with a different viscosity than in the composition according to the invention.

Example 9. In the mixer load 50% of the 8% aqueous solution of isoprene rubber, 48% of the oxidized oil with 55

32

21

24

sixteen

10 10

10 20

10 10

48 10 10 10

48

49

56

38 64

viscosity 30 s for VZ-4 and 10% desiccant. The mixture is stirred until a homogeneous film-forming solution is obtained, after which the physicomechanical parameters are determined.

Example 10. In the mixer load 50% of the 8% aqueous solution of isoprene 59757616

rubber, 48% of the oxidized ssuyu oil, and then physicists are injured with 60 seconds according to VZ-4 and 10% of Sikka-mechanical indicators, tiva. The mixture is mixed up to semi- in table 2 presents the properties of the shoulder of a homogeneous solution of film-forming forms and coatings based on them. Color according to iodometric scale 510 Content of nonvolatile substances,% 24 24 Drying time to the degree of 3.4 610 Film hardness according to the device lO, 3O ,, 2 Durability at 1 1 bending, mm Film durability for impact, kgf / cm Water resistance of the film without iz720 72 changes, h Testing in the climatic chamber fayetron, cycles 100 10 Tab. 3 presents data comp. OTTfv. UUV rt tt tl t N NPiT r TWvttf f - filament film-forming properties

Color on iodometric scale

Content of nonvolatile substances,%

tables a 3

Composition

45-170

170 170

800

24-55

55. 55 170100 120170 5532 4047 2410 1212, 0.30.3 11 11 5050 5050 720720. 720720 100100 50100 and we offer coatings based on them, examples

Continued table. 3

Claims (1)

Claim A film-forming composition for 50 'coatings, including synthetic isoprene rubber with mol.m1 50000-300000, oxidized vegetable oil, desiccant and organic solvent, which means 55 seconds so that, in order to reduce drying, increase hardness, water resistance and weather resistance of coatings, it contains as a vegetable oil to grow. solid, oxidation to a viscosity of 40I 50-s according to VZ-4, in the following ratio of components, wt.%: Synthetic. isoprene rubber with a mol.m. · * 150000-300000 oxidized vegetable oil Desiccant Organic solvent 4-32 _ 4- 48 5-10 Rest