DE2245267B2 - Production of polymer blends - Google Patents

Description

Membranes or structures, or as surface coatings, may be used have adhesive properties, so that in these cases cover or protective layers on the coating can be attached.

Shaping can be done by injection molding, molding or calendering, as long as the preparations are still liquid or semi-liquid. On the other hand, film-like structures can be created by spraying, Dipping or brushing the mixture onto a carrier material can be produced, the carrier material can be located within the finished film or on one of the surfaces. If necessary, can the molding also by casting with suitable molds previously treated with a release agent happen. Depending on the type of mixture, the preparations can be poured or extruded into the molds or be poured. The preparations set without significant shrinkage occurring, so that even large molds can be made, such as molds in the smallest Measure dimension up to 15.2 cm. It is often beneficial to close the molds during the manufacturing process heat; however, the heating temperatures should be below 95 ° C, especially between about 75 to 9OC, lie.

The flexible, pre-formed structures usually have a thickness of 0.08 to 2.54 such as, for example C, 159 or 0.106 cm. The foils are generally about 1.2 meters wide and up to 3.05 meters long; preferred Dimensions are 1.2 2.4 m. If necessary, these structures can, however, also be designed as an endless belt be.

The pre-formed structures can be coated on one side with an adhesive, the Adhesive layer preferably has a thickness of about 0.005 to 1 cm so that it can be attached to other objects can be glued or attached.

The preformed structures can be made by incorporating a fabric or a membrane in the tensile and Tensile strength can be improved and / or modified in addition to the pre-formed structures can be removed from the molds in a very short time when they are remolded. To this Purpose can be metallic or non-metallic in the form of a mesh or a perforated and / or a non-perforated sheet-like material present fabrics or membranes can be used. The pre-formed, flexible plastic structures can therefore be shaped from the polymer mixture in such a way that that they combine with film-like structures of another material, but this is not done Structures existing either on one or both sides of the plastic sheet or plastics optionally present within the plastic film can.

The foils made of a different material can be less flexible compared to the plastic foil be so that they cause a stiffening effect. Suitable materials for these purposes can be made of fabrics, nets, metal foils, plastic core, plasterboard or reinforcing fillers such as Asbestos, glass, mica or metal fibers are made.

The combined structures of the flexible plastic films and the other film-like structures can either by molding the flexible plastic film and then applying the respective other film, which in turn is either preformed or made hot in situ by molding can, or by shaping the sheet-like structure made of another material and then Applying the flexible plastic film are made.

The invention is explained in more detail below with reference to the examples.

ίο Example 1

Mixture A

Parts

1) chlorinated polyphenyl plasticizer at 62 °; Cl (e.g. trademark »Arochlor

6062 «) 78

2) Chlorinated polyphenol plasticizer with 42% Cl (e.g. trademark »Arochlor 1242 «) 29

ao 3) Micronized silica gel (e.g. trademark "Syloid ZNL") 48

4) Nonionic dispersing aid

(e.g. trademark »Texofor 65A3P«) 1

Ingredients 1) to 4) were mixed together to form a heavy liquid.

Mixture B

Parts

5) Polystyrene emulsion (e.g., trademark

"Vinamul 7700") 54

6) Polyacrylate thickener (e.g. trademark »Glopol 2010«) 3

7) Titanium dioxide pigment (rutile) (e.g. commercial

brand »Tioxide RFC 2«) 11

Ingredients 5) to 7) were mixed together to form a thin cream.

Mixture B was then mixed into Mixture A using a small paddle mixer stirred in, forming a stiff, cream-like mass which was spread out as a thick layer.

After about an hour the product hardened and became rubbery, and after a day it was formed a flexible film.

Example 2

Mixture A parts

1) Aromatic gum processing oil

(e.g. trademark »Flexon 340«) 22

2) Chlorinated paraffin plasticizer with 42% Cl (e.g. trademark

»Cereclor 42«) 17

3) Chlorinated paraffin plasticizer with 54% Cl (e.g. trademark

"Cereclor 54") 58

4) Calcium Chloride Anhydrous 23

5) whipping chalk (e.g. »Omya Violet

Evil Whiting ") 29

6) Paraffin wax with a melting point of

130 ⁰ C (e.g. "BP grade 125/135") 13

Ingredient 6) was melted in a mixture of ingredients 1), 2) and 3). After this To cool, ingredient 47 was added and the total mixture was ground in a three-roll mill.

A heavy liquid was obtained after the addition of ingredient 5).

Mixture B

Parts 52

7) Butyl latex (e.g. "Esso grade BP 100")

8) titanium dioxide pigment (rutile)

(e.g. »Tioxide RFC 2«) 8

9) amide sulfonate surfactant (e.g. sodium oleyl p-anisidine sulfonate) 1

The component 9) was stirred in the intended amount of the component 7), and after 30 minutes ingredient 8) was added, a milky liquid being formed.

Mixture B was then stirred into mixture A, instantly a viscous mass formed, which was poured into molds. After about 10 minutes the mass became rubbery and after a day it became rubbery Formed filler mixture.

Claims (3)

ι »2 ^ * or calcium oxide, calcium chloride, orthoesters such as patent claims · trimethyl orthoformate or molecular sieves. The speed at which the polymer mixture sta- 1. Process for the production of a polymer mile developed physical properties, depends on the properties and an elastomeric or non-elastomeric polymer added amounts of the drying agent, a solid drying agent and an agent used by mixing an aqueous emulsion 5, among other things; often at least one stoichiometric plasticizer must be used for the polymer, characterized by the fact that the aqueous polymer is used _; . jarbei-dispersion of the drying agent in the softening agent. The plasticizer and the drying agent mixed as a continuous phase and medium must form a mixture which uses sufficient drying agent that it is liquid, so that the polymer emulsion can simply be worked with essentially all of the water present. Desiccant reacts and / or from this 15 suitable plasticizers for the particular used is absorbed. Polymer are known and can be used for each 2. The method according to claim 1, characterized in that the intended use is selected in a simple manner indicates that the mixing process at ambient and / or mixed together. Often use temperature is carried out. Dete plasticizers are, for example, chlorinated di- 3. The method according to claim 1 or 2, characterized 20 or terphenyls, hydrocarbon oils. Tar oils and characterized in that the resulting mixture is petroleum derivatives such as bitumen, ester-like soft-2 contains up to 50 percent by weight of a polymer. makers, chlorinated paraffins and chlorinated paraffin waxes, vegetable oils or polyenes such as polyisobutylenes. 2 ₅ Solid or liquid resins, waxes or petroleum derivatives can be used to achieve certain properties, for example by heating and ' The invention relates to a method for producing or mixing beforehand with the plasticizers of polymer blends that range from hard and tough to mixed, provided that this blend is at can be adjusted to be soft and flexible. 30 further processing with the plastic emulsion According to the invention, a method of production is sufficiently fluid at the mixing temperatures. Development of polymer blends is proposed in which the mixing is preferably carried out at room temperature, an aqueous emulsion of an elastomeric or non-temperature, i.e. without additional heating or cooling, elastomeric polymers, a solid drying agent, but in some cases it can be mixed with a plasticizer for the polymer will also be desirable during the mixing process, and which is characterized by heating, in these cases the temperature of the aqueous polymer emulsion as discontinuous in the mixture should not rise above 95.degree.
Phase with a dispersion of the drying agent in cases in which commercial polymer emulsions are used as a continuous phase mixed with the plasticizer, it is generally used and so much drying agent that it is not necessary to add additional emulphurization stabilizers with essentially all of the water present , since this generally already reacts in the drying agent and / or emulsion is present from this; is reabsorbed under certain conditions. The finished mixture can, for example, but can advantageously include the addition of a stabilizer from 2 to 50% or from 5 to 40 percent by weight; be stig to include one for each polymer use. 45 to achieve sufficient processing resistance The polymer can be elastomeric or non-elastomeric. Suitable stabilizers are, for example be some organic polymer or copolymer. Protective colloids such as gum arabic, non-ionic In the process according to the invention, surfactants such as condensation products from fatty alcohols can be used natural or synthetic elastomers processed or AlLylphenolen with ethylene oxide, anionic ten- will. Suitable non-elastomeric organic poly- 5 ° sides such as alkylarylsulfonates or straight-chain alkyl mers are, for example, polyvinyl chloride, polystyrene, sulfates or, in special cases, cationic surfactants Polyacrylates or polyolefins. Optionally, such as cetyl trimethylammonium bromide. Aqueous emulsions can also be processed, which when using certain drying agents contain more than one polymer. when mixing the components 1.) and 2.) one As a drying agent, solid or liquid 55 can generate considerable heat; This is chemical or physical drying agents Favorable if the polymer is included in the plasticizer find application. Otherwise only poorly soluble under the designation »drying- the mixture temperatures medium «are used in the description and in the description. Proverbs understood substances that either by The preparations can also be suitable filling chemicals Reaction with the water and / or with substances, adhesives, extenders. Thickener, physical adsorption processes mainly pigments, antioxidants, ozone-inhibiting agents, all water contained in the emulsion in such a fungicide, dispersant for fillers or Convert form that it is at room temperature and flame retardant and optionally Schäuunter Atmospheric pressure no longer evaporates. Containment agents; when using the latter Suitable drying agents are, for example, silica products foamed from the preparations acid, types of gypsum such as calcium sulfate. hemihydrate (which may be used as a binding agent for faster putty binding may contain an accelerator), barium-like sealants, as fo'.ien-like preformed