Polymer composition for bottom shoes

 

(57) Abstract:

The invention relates to the rubber industry, in particular to compositions for bottom shoes. The polymer composition comprises, by weight.h.: butadiene-styrene rubber having a content of bound styrene of 30 wt.% or butadiene-styrene thermoplastic elastomer 100, 1,4-phenylene-bis-biguanides 2,5-5,5, modifier oligopyrroles brand ICF 8-15, softner: paraffin 8-15, vaseline technical 0-8 and rosin 0-5, Aerosil 25-35, kaolin 20-30, the pore-forming CHS-21 1,5-1,8, antioxidant phenolic type 0,5-1,0, light 4-alkoxy-2-hydroxy-benzophenone, 0.5 to 1.5. The composition has a high viscosity, heat resistance, strength of materials at break and durability of the adhesive joints of the bottom of the uppers of shoes made of natural leather. table 2.

The invention relates to the rubber industry, in particular to polymeric compositions for bottom shoes.

Known rubber mixture for the bottom of a Shoe, comprising a combination of butadiene-styrene and butadiene-methylstyrene rubbers in a mass ratio of 70: 30, sulfur, stearic acid, zinc oxide, 2,2'- dimensionalised, diphenylguanidine, regenerate, Aerosil, white carbon, azodicarbonamide CHS-21, a pore-forming paste, aromatic the 05.1990).

However, the composition having good resistance to repeated tension and bending, and abrasion, has a low tensile strength and durability of adhesive joints soles with uppers of the shoes.

Known composition for parts of footwear, including shoes for the bottom, including butadiene-styrene thermoplastic elastomer, plasticizer, mineral filler, stabilizer, blowing agent CHS-21 and curing agent in the indicated amounts (EN, 2061715 A1, 10.06.1996).

However, this composition has drawbacks - low conventional strength at break and adhesion performance. The closest prototype of the selected polymer composition for bottom shoes, including butadiene-sterelny polymer - thermoplastic elastomer, Aerosil, kaolin, softner - industrial oil, Preobrazovatel - azodicarbonamide CHS-21, antioxidant (EN, 2161429 C1, 10.01.2001).

This composition has a high strength at break of 10.4 to 12.2 MPa, high elongation 529-1120%, the hardness at 70-71.E. However, the disadvantages include low viscosity, heat resistance, and the strength of the adhesive connection soles with uppers of shoes made of natural leather.

The problem is solved in that the polymer composition for the bottom of a Shoe, comprising a butadiene-styrene polymer, Aerosil, kaolin, softening agent, a pore-forming - azodicarbonamide CHS - 21, antioxidant phenolic type, as a butadiene-styrene polymer contains styrene-butadiene rubber with 30 wt.% linked styrene or butadiene-styrene thermoplastic elastomer, as a softener - paraffin, petrolatum technical, rosin and extra - 1,4-phenylene-bis-biguanides, modifier-oligopyrroles brand of ICF, light - 4 alkoxy - 2-hydroxybenzophenone in the following ratio, wt. including:

Specified butadiene-styrene polymer - 100

1,4-Phenylene-bis-biguanides - 2,5-5,5

Modifier ICF - 8-15

Paraffin - 8-15

Vaseline technical - 0-8

Rosin - 0-5

Aerosil - 25-35

Kaolin - 20-30

The pore-forming - azodicarbonamide CHS-21 - 1,5-1,8

Antioxidant phenolic type - 0,5-1,0

Light - 4-alkoxy-2-hydroxybenzophenone linked styrene and 30 wt.% the following grades: SKS-30 ark (GOST 6074-57), SCS-30 apkm-15 (GOST 11138-65 ) and Thermoelastoplastic DST-30 (TU-38 103267-80 ) and Sibelan (TU-RSFSR-8879-887904-92).

1,4-Phenylene-bis-biguanides has a chemical structure

< / BR>
and performs the composition of the function linking agent (TU-6-14-778-76). Oligopyrroles brand ICF is in the composition in the role of modifier properties of the polymer composition (TU-32-1780-76) and together crosslinking agent improves the strength, adhesion and other properties of the composition - resistance to repeated bending, abrasion, elasticity, heat resistance, resistance to aggressive media (oil, gasoline) compositions. As softener composition comprises paraffin (GOST 784-83), petrolatum, technical (OST-38-0156-79) and rosin (GOST 797-64). Aerosil (GOST-14922-77 ) and kaolin (GOST 19608-84) is in the composition as a filler azodicarbonamide CHS-21 is used as blowing agent (TU - 6-03-408-76). As an antioxidant phenolic type can be used 2,2'- methylene-bis(6-tert-butyl-4-METHYLPHENOL) (TU 38-101617-76), which protects the rubber from the action of oxygen and heat. In combination with it is used as sitosterolemia 4-alkoxy-2-hydroxybenzophenone (TU 6-14-197-76). Both belong to nekrashevych stabilizers. The composition subretinally a crosslinking agent, then according to the given recipe add other components. After mixing, the mixture granularit on standard equipment. Formed into finished products by injection molding or pressing. The resulting polymer composition according to the invention is illustrated by the examples in table 1.

Measurement of physico-mechanical parameters was carried out in accordance with GOST. All indicators are shown in table 2.

The polymeric material of the composition and plantar products have a porous structure, light and durable, have high enough performance.

Polymer composition for the bottom of a Shoe, comprising a butadiene-styrene polymer, Aerosil, kaolin, softening agent, a pore-forming - azodicarbonamide CHS-21, antioxidant phenolic type, characterized in that it contains as butadiene-styrene polymer, styrene-butadiene rubber content of 30 wt. percent bound styrene or butadiene-styrene thermoplastic elastomer, as a softener - paraffin, petrolatum technical, rosin, and optionally the composition comprises 1,4-phenylene-bis-biguanides, modifier - oligopyrroles brand of ICF, light 4-alkoxy-2-hydroxybenzophenone the next zootoxin

Modifier ICF - 8 - 15

Paraffin - 8 - 15

Vaseline technical - 0 - 8

Rosin - 0 - 5

Aerosil - 25 - 35

Kaolin - 20 - 30

The pore-forming - azodicarbonamide CHS-21 - 1,5 - 1,8

Antioxidant phenolic type - 0,5 - 1,0

Light 4-alkoxy-2-hydroxybenzophenone - 0,5 - 1,5

 

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