CS268569B1 - Two-component self-curing butyl rubber compound - Google Patents

Abstract

Riozonio sn refers to the provision of two-component self-curing mastic to butyl rubber or Joho combination 3-propyl-propyl-dione rubber, which is the base component inorganic fillers, zmacadiol, rastlinnóho oloja and organlokóho the solvent contains 0.3 to 15 wt. lead oxide, while slotting the component consists of 3 to 20% by weight of quinone dioxime, 10 to 40 wt. minorál- Filler and 25 to 90 µm lunot, mineral oloja, aloho basic component instead The content of lead oxide is 0.05 until. 5 λ wt. ohinondioxime and crosslinking The component consists of 5 to 40 lunot. oxide olovičitólio, 10 to 45% lunot. minerálnoho fillers and 20 to 75% by weight mineral Oloj. Využitio prichází consider the elastic binder of silicate dioloos and others end up being sulky materials such as ooei, aluminum, glass etc.

Description

The present invention relates to the composition of a two-component self-vulcanizing sealant based on butyl rubber, or to a combination thereof with an ethylene-propylene terpolymer suitable for flexible automotive silicate sheets and other components.

With the development of construction and industrial activities, the requirements for the qualitative parameters of sealants increase, especially for the ability to absorb and transmit high deformations, resist agrosilicon chemicals and high temperatures. An important requirement for these sealants is material.

Some of the required properties are met by elastic, gradual vulcanizing sealants based on EPDM, the eye e.g. materials according to Cs AO 197 984. However, due to the system used, these sealants are characterized by a very low high-temperature vulcanization at room temperature.

From the patent literature on this subject, rapid penetration systems suitable for crosslinking EPDM-based sealants using quinoids and halogenated sulfonamides are known. These are the materials of the basis of U.S. Pat. Nos. 2,956,056, 3,147,259 and 2,398,599.

The field relates to sealants based on butyl rubber or polyisobutylene, in particular the compositions of materials characterized by plastic or plastlo-elastic behavior are known. Examples are the materials of the CS AO 154 136, SU 497 327, SU 486 035, SU 448 215, or U.S. Pat. No. 3,912,684 patent materials. U.S. Pat. No. 3,704,196 describes the compositions of one-component self-vulcanizing butyl rubber-based sealing materials. The communication system is based on resoroin, a formaldehyde donor and chromic acid. The materials thus prepared are characterized by a very low rate of vulcanization at room temperature.

In terms of the required properties, these requirements are met by one-component sea-water-curing sealants prepared on the basis of organosilicon compounds and multi-component sealants based on polyurethane and polysulphate rubbers,

At present, there is a lack of high-quality elastic sealants in the Czechoslovak Socialist Republic, the use of which is hindered by the particularly high price and the need to import these sealants or basic components from foreign exchange disadvantageous areas.

These objects are overcome by the present invention, which is a two-component self-vulcanizing sealant based on butyl rubber, or a combination thereof with an ethylene-propylene torpolymer containing, in addition to fillers, plasticizers and an organic solvent, lead oxide lead or p-chondondloxime may have been in the second component of the sealant, dosed in paste form into the base component of the sealant just prior to its application.

The two-component platform sealant prepared on the basis of butyl rubber alone is characterized by high adhesion mainly to concrete and metal, and is therefore suitable for sealing aluminum and metal profiles and for sealing silicate joints in panel construction. a combination of butyl rubber of a small elastomer, preferably an ethylene-propylan torpolymer of the ENB type. / As a thermonomor is othylidonnorbornone, /

The vulconization system consists of synergistically acting components, namely: p-quinondioxime, lead dioxide and substances of a polar nature, e.g. triethanolamine, which in an optimal combination reduce the induction period during vulconization and accelerate the rate of sulphionation.

Siolovanio can be explained as a complex action of vulcanization activators and lead oxide, which oxidizes p-quinondioxime, which acts as a vulcanizing agent reacting with butyl rubber double bonds, possibly with a small component of EPDM to form a stable three-dimensional J-slot. It is possible to prepare sealants with an optimal combination of Jo components, characterized by a short vulcanization time at room temperature, high heat resistance and good physico-mechanical properties.

CS 268 56? Bl

The addition of high-pressure polyethylene with a melt flow index of preferably 0.3 g / 10 min A imparts in the sealant properties 11a and its properties increase the resistance of the taol to the effects of acrosive media. Mineral paraffinic oils and carboxylic acid esters, for example, have been used as plastic additives. The addition of drying vegetable oil has a favorable effect on the salting out of the surface layer of the sealant and enhances its initial tack. calcium carbonate with a particle size of 0.2 to 4 .mu.m, titanium dioxide of the anatase type and a particle size of 0.2 to 0.6 .mu.m, asbestos with a fiber length of 3 to 7 .mu.m and the like. To ensure resistance to weather aging, especially against ultraviolet radiation, it is suitable to add to the sealant e.g. thermal soot with a particle size of 120 to 150 yum. The putty may also contain antioxidants commonly used in rubber practice. By selecting the content of the organic solvent in the sealant, which may be toluene, xylene and the like. It is possible to prepare pastes of pasty character suitable for the production of jointing and potting compounds, in order to seal complex details.

It is possible to regulate the vulcanization of the sealant, the properties and the quality of the sealant by the amount of activators and strength additives added.

..... In order to increase the adhesion of the sealant to the glass, an aminoalkylsilane may be added to the sealant. ·

The preparation of the sealant is carried out on side rubber equipment. In the first stage, the rubber is filled with rubber, polyethylene, filled and mixed with plasticizer1, and in the second stage, the mixture is soaked in a Ramon mixer with a common portion of plasticizers and solvents to a pasty consistency. The sealant is then filled into suitable containers e.g. polyethylene. The second component - reinforcing - is mixed in a mixer and filled into packages in proportions to the base putty. Prior to application, the casting component is mixed into the sealant manually or by means of a special grinding device. The application of the sealant is then carried out either. manually with a metal spatula or extruder by means of a pneumatic extruder directly into the joints,

The vulcanization of the sealant is temperature-dependent, occurring at room temperature for 1.5 to 3.5 hours. After this time, the sealant is difficult to process. Optimally values of putty doeiahno after about 15 days,

Vulcanized sealant is characterized by high elastic strength in lye up to 4 MPa, laziness, hardness up to 15 ShA and low modulus. The sealant is able to withstand striodium deformations of about 20 in accordance with ČSN 72 2331.

Dutyl rubber, which is the basic component of the sealant, can be obtained from the import-friendly area. However, based on the achieved yields, this type of sealant is a technical and economic benefit in applications in various sectors of our national economy. Further details of the stage of the invention are apparent from the following examples, to which the invention is exclusively limited. Example 1

Butyl rubber 15 lunets, high pressure polyethylene 3 melt flow index 0.3 β / 10 "in 4 lunets, titanium white 0.5 lunot., Micronized limestone 45 wt. , linseed oil 2% by weight, dibutyl phthalate 5% lunette, p-quinondioxime 0.2 lunot, bearing oil 2 l lunot., xylene 5% lunot., carbon black, thermal lunot. 0.4 lunot., triethanolamine 0.5 lunot.

Sealing paste added to the sealant just before its application: lead dioxide 10 lunot, bearing oil 30 lunot, micronized limestone 25 wt.

Example 2 '

Butyl rubber 12% lunote, high pressure polyethylene with a melt flow index of 1 g / 10 min, lunot, titanium coating 1% lunot, micronized limestone 20% by weight, asbestos 2 Jó lunot ,,

CS 268 569 B1 bearing oil 16% by weight, rope oil 5% by weight, dibutyl phthalate 6% by weight, toluene 20% by weight, lead dioxide 0.5% by weight, triethanolamine 1% by weight.

The sulphurizing paste added to the sealant immediately before its application: p-olefin dioxide mass, bearing oil 10 is lunet., Micronized lime.

Example 3

Butyl rubber 12 wt.%, Ethylene-propylene terpolymer type ENB 5 wt.%, High-pressure polyethylene with a melt flow index of 2 g / 10 min. 6 wt.%, Micronized limestone JO wt., Thermal carbon black 5 wt.%, Bearing oil 20 wt.%, Rope oil 3 wt.%, Triotanolamine 0.4 wt.%, Bonzane 5 wt.%, P-ohonone dioxime 0.5? · Wt.

Sealing paste added to the sealant before its application: lead oxide 20 wt., Bearing oil 40 wt.%, Micronized limestone 40 wt.%.

Example 4

Butyl rubber 14 wt.%, High pressure polyethylene with a melt flow index of 0.3 g / 10 min. 4 wt.% Micronized lime 40 wt.% Thermal carbon black 0.5 wt.%, Bearing oil 20 .mu.m lunot., Dibutyl phthalate 4 wt.%, Drying vegetable oil 1 wt.% Xylene 10 wt.%, 3-aminopropyltriethoxysilane 1 .mu.m mass of .beta.-quinondioxime 0.3? Aging paste added to the sealant just before its application · lead oxide 15% by weight, bearing oil JO is lunot, micronized lime 25% by weight.

The results of the putty paramotres given in Examples 1 to 4 are as follows in terms of CS 72 2JJ1;

penetration; 185 to 220 stekonia penetration units: 1 to J mm hardness; 5 to 15.

cohesion in Example 4 Is the adhesion greater than cohesion

Claims (2)

BEFORE THE METHOD OF THE INVENTION A two-component self-vulcanizing sealant based on butyl rubber, or a combination thereof with 3-ethyl-propylene-dione rubber, consisting of a base component and a crosslinking component, characterized in that the base component of the sealant contains 5 to 10% by weight of butyl rubber or its combination with ethyl propylon-dione rubber is preferably containing a conjugated dione, 2 to 10 .mu.m. of high-pressure polyethylene with a melt flow index of 0.2 to J c / l ° min., 10 to 55 J lunot, minor fillers or carbon black, 10 to 40% lunot, mineral oil, 1 to 10 l lunot. phthalate plasticizer, 1 to 10% by weight, desiccant vegetable oil, 0.1 to 5% by weight, hydroxylamine, 1 to 30% by weight, aromatic solvent, 0.1 to 15% by weight, lead dioxide and a silating component consisting of J to 20%. 10 to 40. lead dioxide, 10 to 25 wt.%, mineral filler and 20 to 75 wt.%. mineral oil. 2, A two-component self-vulcanizing stage sealant according to claim 1, characterized in that the base component of the sealant additionally contains 0.1 to 5% of aminoalkylsilane.