RU2206652C1 - Method of manufacturing heat-resistant material - Google Patents

Abstract

FIELD: polymer materials. SUBSTANCE: invention relates to manufacture of artificial leathers, which can be used for technical- and special-destination objects, in particular to manufacturing heat-resistant material. The latter is obtained by forming coating on fabric support by way of applying polymer composition including polyvinylchloride, plasticizer, antimony trioxide, and stabilizer. The support is viscose or blended viscose-polyester cloth having rupture strength at least 500 N for warp and at least 300 N for weft. To composition are further added epoxide oligomer and filler containing calcium carbonate, stearic acid, and m- diethylaminophenol/phthalic anhydride condensation product in presence of sulfuric acid. EFFECT: increased fire- retarding capacity and wear resistance of material suitable for use under extremely high-temperature conditions. 4 cl, 2 tbl, 3 ex

Description

 The invention relates to light industry, and more specifically to the production of artificial leather that can be used for technical and special purposes.

A known method of manufacturing a heat-resistant material from a composition containing 100 parts by weight PVC, 45-52 parts by weight ester plasticizer, 4-6 wt. including lead stabilizer, 4-9 parts by weight antimony trioxide, 10-30 parts by weight aluminum hydroxide, 3-5 parts by weight aerosil and 2-4 parts by weight epoxy resin (ED-16, ED-20). These components are mixed in a turbo mixer at T = 110-115 ^o C, then the mixture is cooled and granulated at T = 150-170 ^o C. From the obtained raw materials, the material is made by a roller-press method (US Pat. RF 2034874, C 08 L 27/06, from 06/30/1992).

Known material has a sufficiently high frost resistance, retains its properties after exposure at T = 100 ^o C, however, the level of properties of fire resistance, ductility and wear resistance does not allow it to be used for the manufacture of firefighters clothing and other means used in extreme conditions of high temperatures.

 A known method of manufacturing a multilayer heat-resistant material by applying to a woven substrate a polymer composition made on the basis of modified polyvinyl chloride (PVC) and containing a mixture of antimony trioxide and a halogen-containing flame retardant in two layers of the same thickness equal to 2 mm The inner layer is obtained by applying a composition containing 100 wt.h. PVC, 1-20 parts by weight antimony trioxide and 19-80 parts by weight halogen-containing flame retardant, and the outer layer is a composition containing 100 wt.h. PVC, 9-29 parts by weight antimony trioxide and 1-10 parts by weight halogen-containing flame retardant (AS USSR 963886, D 06 N 3/00, from 03.10.1983). The composition contains dioctyl phthalate as a plasticizer, calcium stearate as a stabilizer, and hexabromobenzene or trichloroethyl phosphate or pentabromtoluene as a halogen-containing flame retardant.

Known material has a fire resistance of the oxygen index of 32.5-34.5%, frost resistance of -20 ÷ 25 ^o With and just like the first analogue, does not have the necessary level of properties for the manufacture of firefighter clothes and other means used in extreme exposure to high temperatures.

 According to the number of essential features, this solution is the closest to the proposed one and is selected as a prototype.

 The objective of the invention is the creation of a method of manufacturing a heat-resistant material with a PVC coating of increased fire resistance and wear resistance, suitable for use in extreme conditions of exposure to high temperatures.

The technical result is achieved by the fact that in the method of manufacturing a heat-resistant material by forming a coating on a fabric substrate when applying a polymer composition comprising polyvinyl chloride, a plasticizer, antimony trioxide and a stabilizer, a viscose or blended viscose-polyester fabric with a tensile strength on the basis of not less than 500 N, and for a duck no less than 300 N, an epoxy oligomer and a filler containing calcium carbonate, stearic acid and a condensate product are additionally introduced into the composition uu m-diethylaminophenol with phthalic anhydride in the presence of sulfuric acid, with the following component ratio, mass parts .:
Polyvinyl chloride - 100
Plasticizer - 55-65
Antimony trioxide - 14-18
Stabilizer - 2-4
Calcium carbonate - 9-11
Stearic acid - 0.5-15
Epoxy Oligomer - 1-2
Condensation product of m-diethylaminophenol with phthalic anhydride in the presence of sulfuric acid - 3-5
For coating, known epoxy oligomers, plasticizers and stabilizers can be used. The most technologically advanced for the proposed method from the known specified components are: epoxy oligomer - epoxy resin ED-16 or ED-20, plasticizer - a mixture of dioctyl phthalate and dioctyl sebacinate with a ratio of components in the range of 4.0-5.0: 1-2, stabilizer - barium cadmium stearate.

Изобретение поясняется следующими примерами.The condensation product of m-diethylaminophenol with phthalic anhydride used in the presence of sulfuric acid has the following formula:

The invention is illustrated by the following examples.

 Example 1

For the manufacture of the material using the following components:
PVC, GOST 14332-78E;
antimony trioxide, TU 48-14-1-82 or TU 6-09-3267-84;
dioctyl phthalate (DOP), GOST 8728-77E;
dioctyl sebacinate (DOS), GOST 8728-77E;
epoxy resin ED-16, ED-20, GOST 10587-84;
barium-cadmium stearate, TU 8-094808-81;
stearic acid, GOST 9419-78;
calcium carbonate, GOST 8253-79;
condensation product of m-diethylaminophenol with phthalic anhydride in the presence of sulfuric acid from Radiant, Belgium.

The components of the polymer composition are mixed in a mixer at T = 100 ± 5 ^° C for 45 ± 5 min and rolled at T = 150 ± 5 ^° C for 20 ± 1 min. The plastic is removed from the rollers in a hot state.

The coating is applied on a KM 1500 laminating machine to a composite viscose-polyester fabric (GOST 29222), weighing 180 g / m ² , tensile strength based on 1000 N, and weft 600 N, by feeding hot PVC compound into the gap between the melting shafts ( T = 80-100 ^o C). Plastic in the form of a continuous film is fed to the substrate coming from the heating shaft, and with it passes between the melting and rubberized shafts, where the film is duplicated with the substrate. To gloss or emboss the pattern, the duplicated material is fed into the gap between the stationary melting shaft (supporting) and the embossing shaft. The pressure on the embossing shaft is 80-90 kgf / cm ² , on the rubber - 80-100 kgf / cm ² . The speed of the substrate is 10-12 m / min.

The thickness of the material is 0.55 mm, weight 550 g / m ² .

 Example 2

 Heat-resistant material is made in the conditions of Example 1 with a change in the concentration of the components of the composition used for coating.

Material thickness 0.60 mm, weight 600 g / m ² .

Example 3
Heat-resistant material is made in the conditions of Example 1 with a change in the substrate material and the concentration of the components of the composition used for coating. The substrate is a viscose fabric TU 8388-014-00321098-98, its tensile strength on the basis of 980 N, the weft - 800 N.

The thickness of the material is 0.65 mm, weight 650 g / m ² .

 The composition of the compositions of examples 1-3 are presented in table 1.

 The properties of the obtained materials are shown in table.2.

 For comparison, Table 2 shows the properties of upholstery vinyl based on a mixed fabric with a polyvinyl chloride coating in a non-flammable, frost-resistant design, corresponding to Change 1 GOST 23 367-86.

The presented examples indicate a high level of the complex properties of the material obtained in accordance with the claimed invention, namely:
- wear resistance increased by 25 times (Clause 2 of Table 2);
- strength properties increased 1.6-2.5 times (paragraphs 1, 3 of table 2);
- fire resistance by the oxygen index increased ~ 1.7 times (Clause 5 of Table 2);
- It is resistant to ambient temperature for 180-220 s.

Claims (3)

1. A method of manufacturing a heat-resistant material by forming a coating on a fabric substrate when applying a polymer composition comprising polyvinyl chloride, a plasticizer, antimony trioxide, a stabilizer, characterized in that a viscose or blended viscose-polyester fabric with a tensile strength of at least 500 N is used as a substrate and at least 300 N in a weft, an epoxy oligomer and a filler containing calcium carbonate, stearic acid and the product of condensation of m-diethylaminophenol with phthalic anhydride in the presence of sulfuric acid in the following ratio of components, parts by weight:
Polyvinyl chloride - 100
Softener - 55 - 65
Antimony trioxide - 14 - 18
Stabilizer - 2 - 4
Calcium carbonate - 9 - 11
Stearic acid - 0.5 - 15
Epoxy Oligomer - 1 - 2
Condensation product of m-diethylaminophenol with phthalic anhydride in the presence of sulfuric acid - 3 - 5
2. The method according to claim 1, characterized in that a mixture of dioctyl phthalate and dioctyl sebacinate is used as a plasticizer with a ratio of 4.0-5.0: 1-2, respectively.  3. The method according to claim 1, characterized in that the epoxy oligomer use epoxy resin ED-16 or ED-20.  4. The method according to claim 1, characterized in that barium-cadmium stearate is used as a stabilizer.

Images