DE1719184A1 - Synthetic rubber products - Google Patents

Description

Synthetic rubber products

The invention relates to products made from synthetic chews echuken. In particular, it concerns products in strips or Tape shape suitable for use as glazing tapes, adhesive tapes, Sightings and are suitable for similar purposes. Glazing tapes are in general use around the bands of glass sheets laid around and imprinted in grooves of a suitable shape made in the circumferential direction of the gate and brackets or frames for represent the panes of glass. Adhesive strips can serve two Connect parts together. Similar strips or ribbons can be also inserted between certain components of motor vehicles to counteract the occurrence of squeaking noises, these strips then usually acting as anti-squeak bands are designated. Other similar strips can be used for soundproofing purposes Find use, also mostly in motor vehicles. ·

The invention provides a tape strip that serves as a glazing tape, adhesive tape, waterproofing or the like or is suitable for these uses and is made from a rubber compound consists, dia «in elastomeric mixed polymer

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▼ on ethylene and propylene, the tape strip being uncured 1st.

Up to now it was common to use tape strips for this purpose Use made of cured or vulcanized rubbers passed, and a special feature of the invention lies in the Creation of uncured or non-vulcanized tape strips. the Use of the materials described below allows the Manufacture τοη tape strips with relatively high tensile strength and proportionately great elasticity.

The tape strips according to the invention can be in any suitable manner and know, for example cut out of a riach film, ex-handed or segar according to one Be molded by a compression molding process, for example by an injection molding process. The tape strips do not need to be flat, but can also be designed in the shape of a channel, which have a more complicated shape. Is it can be stated that in general the Misehings necessary for the production of the tape strips according to the invention are such that they soften when heated and harden without any significant chemical change when they are subsequently cooled.

Xs falls within the scope of the invention, in the tape strip material To introduce curing agents, hardening agents or tolcanizing agents, although their presence is of no practical use, and occasionally can even be associated with slight downsides, as in this case a certain self-hardening of the tape strips in the area of the possible. For these reasons, contain the invention strip of land preferably no networking », hardness or Vulcanizing agents.

Although the rubber compound is also a simple one May contain mixed polymer of Ithy1en and propylene, se contains but they prefer a terpolymer τοη ethylene, propylene and one Service Furthermore, this diene is preferably one with non-conjugated double bonds and the terpolymer is therefore sulfur vulcanizable, although it is not actually any Is subjected to volcanic erosion.

In addition to the mixed polymer, the strip of tape can also contain at least one chewing chew-like compound.

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hold, for example a block copolymer of the general Formula A-B-A, wherein A is a non-elastomeric polymer bloom with a average molecular weight in the range τοη 2,000 to 100 000 and with a glass transition temperature τοη more than 25 C. denotes, while B is an elastomereη polymer block having an average molecular weight in the clay range 25,000 to 1,000,000 and an ulas transition temperature below 10 ° C acts.

lin elastomereβ polymer is in this context a Material that at tree temperature is at least twice its original linear expansion Tsrstreokt can be and that after completed stretching as soon as the deforming force no longer acts, Within the course of the course, it is almost spring-loaded to its original length.

The glass transition temperatures are Torsugweise after dilatometrisohen Metheden determined. line A discussion of this phenomenon and a table of the glass transition temperatures can be found in Whitby, “Synthetic tubber”, 1954i on pages 356 to 36Ο.

There are chew-cheek-like bonds in the torso Busätslieh introduced, in which it is the polymer block A to a polystyrene and the polymer block B is a polyisoprene or polybutadiene.

The tape strips according to the invention contain a torus at least one suitable compounding agent. Numerous substances of this type that can be considered as constituents are after State of the art known and meet their in the usual way Purpose when incorporated into the tape strip material within the scope of the invention.

Embodiment β

The composition is shown in Table I below τοη five mixtures horror from which tape strips according to the invention with these mixtures A, B, C, D and S being used are. The proportions of the individual components are expressed as parts by weight. The component (l) is a commercially available one Mixture τοη oil and one of ethylene, propylene and a diene with terpolymer formed not conjugated double bonds,

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while component (2) is also a commercially available one Styrene-butadiene block copolymer of the type just described Art acts.

Table I.

Components A. B. C. D. E. Component (l) 37.5 37.5 37.5 37.5 37.5 Beard paraffin 3 3 3 3 5 Bass 10 30th - 30th Silicon dioxide 20th - - - - 50 50 50 50 50 Get flour 50 Tar processing oil 12.5 12.5 12.5 12.5 12.5 Fact is - - - 20th - Component (2) - - - - 7.5

"The following table II provides information about the physical Properties of these mixtures.

Table II

ABCDE

Hardness HED

Tensile strength in the grain direction, kg / cm

Percent elongation

70 55 70 38 65 56 67 28 25th 70 150 200 50 150 150

In addition, test specimens of all these mixtures were subjected to a seven-day aging process at 70 C and then in introduced an atmosphere containing ozone at a rate of 10 parts per million, with the material increasing at the same time by 10 percent was stretched. After 48 hours, the samples showed no signs of aging to be established.

Glazing stands made from these mixtures corresponded to the requirements.

Mixture E is specially designed for the production of extruded products intended, for example, for the production of seven

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Glaeungsbänder of those ixt, which are formed with a groove profile are, into which the tape edge of a glass plate is to be fitted, and in which an outer surface is largely unprotected in use is exposed, so that the tape is not received in a metal groove or similar holder, as is otherwise the case with glazing tapes mostly the case.

Based on the attached drawings, some Exemplary embodiments of the tape strips from the inventive Rubber compound explained »

Jig, 1 to 4 connections between glass and a metal frame by means of a tape stripa in cross section;

Fig. 5 to 6 connections of 2 metal sheets by means of a Ribbon in cross section.

A glass pane 1 is connected in a metal frame 2 by means of a double-T-shaped strip of tape. The pane of glass 1 and the metal frame 2 have the same thickness. Likewise, the glass lasso window 1 can have a stronger metal frame 4 be connected by means of a strip of tape 5, which has corresponding grooves in the cross-sectional profile. By a flattening the strip of tape that connects a pane of glass and a metal frame of different thicknesses becomes the mass of the tape strip 6 reduced. The glass pane 1 can also be used together with a tape strip 7 having a hat be sunk in the groove of a metal frame, the tape strip surrounding the glass pane 1 outside the frame 8. Likewise, two metal sheets 10 and 11 can be connected to one another by a double-T-shaped strip of tape 9 in order to To absorb squeaking noises and vibrations. Likewise, plates 12 and 13 of different material by one or two strips of tape overlapping the end faces of the panels are glued together.

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Claims (10)

Claims 1. As glazing tape, adhesive tape, seal or for similar purposes Serving or suitable tape strip, characterized in that the tape strip consists of a chewing compound which is an elastomer s Contains a copolymer of ethylene and propylene, whereby the tape strip is not hardened. 2. tape strips naoh claim 1, characterized in that the rubber compound contains no curing, hardening or vulcanizing agents. 3. Belt tire according to one of claims 1 or 2, characterized in that that it see in the elastomeric copolymer via a terpolymer of Ethylene, propylene and a sien. 4. tape tire according to claim 3, characterized in that it is at the diene is a diene with non-conjugated double bonds and the terpolymer is therefore sulfur vulcanizable, but in fact is not vulcanized. 5. Tape strip according to one of Claims 1 to 4, characterized in that that the tape strip in addition to the copolymer also has at least one contains additionally introduced rubber-like compound. 6. Tape strip according to claim 5, characterized in that βa is a block copolymer of the general formula ABA in the additionally introduced rubber-like bond, wherein A is a non-elastomeric polymer block with an average molecular weight in the range from 2,000 to 100,000 and with a GIa "transitions temperature of over 25 ° C and B an elastomeric polymer block having an average molecular weight in the range de · ven 25000-1000000 and a glass transition temperature below 10 ⁰ C, respectively. 7. tape tires naoh claim 6, characterized in that it is at the polymer block A is a polystyrene. 8. tape strip according to one of claims 6 or 7 »characterized in that that the polymer sheet B is a polyisoprene. 9. Tape strip according to one of claims 6 or 7, characterized in that that the polymer sheet B is a polybutadiene. 10. Tape strips naoh one of the preceding claims, dadmrch characterized, that the tape strip has at least one suitable compounding agent contains. 109835/1597