DD216947A1 - PROCESS FOR PRODUCING CATIONACTIVE BITUMENE EMULSIONS - Google Patents

Abstract

The invention relates to a process for the preparation of cationic bitumen emulsions. A high transport and storage stability with regulable breaking behavior is achieved by adding 0.05 to 6.0% by weight of a mixture of low alkoxylated alkylamines. This cationic bitumen emulsion is particularly suitable in road construction for the execution of Bitumenschlaemmen and for surface treatments.

Description

Process for the preparation of catioriactive bitumen emulsions Field of application of the invention

The invention relates to a method for producing cationic bitumen emulsions, which can be used especially in road construction for the execution of bituminous sludges and surface treatments.

Characteristic of the known technical solutions

Caring and maintenance measures on bituminous road surfaces are mainly carried out using anionic and ionic active, to a small extent nonionic bitumen emulsions. For various fields of application, cationic bitumen emulsions are preferably used on the basis of their specific properties. As cationic emulsifiers, mainly fatty amines and their derivatives, amidoamines and imidazolines have proven to be useful.

By adding various other substances, adjusting a certain pH or mixing different emulsifiers, it is possible to influence the properties of the cationic emulsions within certain limits. For example, alkoxylated fatty alcohols, fatty acids,

η η ,. Ά . iVt; S

acids »Alkylphenols and fatty amines application. '

It is known that alkoxylated amines are used for the stabilization of cation-active bitumen emulsions and the extension of the mixing time with rock minerals. In principle, these emulsifying auxiliaries are used only in conjunction with effective cationic emulsifiers.

Often, cationic bitumen emulsions are also complex, containing many difficult to prepare ammonium compounds and a larger amount of acid, The production of such emulsions is made difficult and economically unfavorable influenced »The reaction with the rock material is confusing and thus can only to a small extent o he will not be regulated at all »

Mixed-stable cationic bituminous emulsions contain as emulsifiers usually polyamines having 3 to 5 nitrogen atoms per molecule. "With the available monoamines alone, a miscible bituminous emulsion suitable for the production of bituminous sludges and other mixtures can not be obtained. There are always additives or a sufficient, but difficult-to-handle masking of the rock building materials required,

\ Object of the invention

It is an object of the invention to effectively produce cationic bitumen emulsions of high transport and storage stability with regulatable breaking behavior.

Explanation of the essence of the invention ^ι

The invention is based on the object cationic bitumen emulsions using alkoxylated alkylamines

manufacture. Erfindungsgeraäß the object is achieved in that bitumen, flooded bitumen, Misqhbitumen, Erdöldestillationsrückstände or compounded bitumen with a loss of 0.05 to 6.0 Ma "-% of a prepared in a single operation by specific reaction mixture of low alkoxylated allylamines, optionally in the presence of organic or inorganic acids, emulsified in water.

The alkoxylated amine mixture contains primary, secondary and tertiary amine in variable proportions of from 0 to 100 % by mass , starting from an alkylamine having 10 to 22, preferably 12 to 18 carbon atoms, and an alkoxylation degree of 0.5 to 8, preferably 1 until 5.

When acid is used, the alkoxylated amine mixture may be added to the bitumen as well as to the water. It is also possible. Mix acid and alkoxylated amine mixture in appropriate ratio and then add to water. In the preparation of cationic emulsions without acid @, the alkoxylated amine mixture is incorporated into the bituminous phase.

The emulsions trfindungsgemäß produced are distinguished by a very good reactivity to Gesteinsbau-, stof fen, but still have high transport and storage stability. Also, further stabilization by the addition of itabilizing agents, such as salts or nonionic surfactants, is possible.

embodiments

The invention will be explained in more detail by way of examples.

example 1

In a road bitumen B 200, were QV \ q, -% of a etho'xylierten mixture of higher molecular weight, straight-chain amines having alkyl groups whose _e essentially 16 and 18 carbon & nstoffatome, homogeneously mixed. The degree of ethoxyation of the primary, secondary and tertiary amine-containing amine mixture was 3.2. The prepared bitumen was in the ratio 3; 2 with acetic acid water, taking the water in advance

2.5 % acetic acid were added, emulsified in a conventional Emülgierrcaschine. A bitumen emulsion having the following properties was obtained:

Viscosity; 34.1 outlet seconds

Stability: unstable ~~ _s . '·

Adhesive characteristic after

Hot water storage: 100 surface%

pH value: 4.60 , '

This emulsion reacts quickly with the rock material and bonds well. Further advantages are the high transport and storage stability. It can preferably be used for surface treatments and fillings.

Example 2

Road construction bitumen B 200 was treated with 4.2% by mass of an amine radical with an ethoxylation degree of

  , , ι. '

1.6 and in the ratio 3: 2 with water.

3.7% by weight of a nonylphenyl polyglycol ether were mixed in, emulsified. The result was a bitumen emulsion with the following properties:

Viscosity: 40.9 outlet seconds

Stability: semi-stable

Adhesive characteristic after

Hot water storage: 100 surface%

pH: 8.75

! 'This emulsion is very resistant to transport and storage and is characterized by ourch good reaction to rock material. But she has a relatively long mixing time. For this reason, it can preferably be used for the production of bituminous sludges and other bituminous mixtures.

Example 3

6.5 Ma. -% of a mixture of 96.2 Ma. % of the ethoxylated amine mixture mentioned in Examples 1 and 2 having a degree of ethoxylation of 3.3 and 3.8% by weight of acetic acid

, v

dissolved in water and emulsified this aqueous phase in the ratio 2: 3 with a bitumen B 200. The ¹ bitumen emulsion thus prepared had the following properties:

Viscosity: ', 77 outlet seconds

Stability: semi-stable

Adhesive characteristic after

Hot water storage: 100 surface%

pH: 6.85

This emulsion has similarly good properties as those mentioned in Example 2 and can also preferably be used for sludges,. ,

Claims (6)

- 6 - right to compensation A process for preparing cationic bitumen emulsions from bitumen, flux, blown bitumen, petroleum distillation residues, bituminous mixtures or compounded bitumen and water, characterized in that 0.05 to 6.0% of a mixture of lower alkoxylated alkylamines are added, .2, process according to item 1, characterized in that the mixture of low alkoxylated alkylamines primary, secondary and / or tertiary amines having 10 to 22, preferably .'- x 12 to 18 carbon atoms, and alkoxylation numbers of 0.5 to 8, preferably 1 to 5, contains. ν 3. The method according to item 1 and 2, characterized in that the mixture of low alkoxylated alkyl amines is added to the bitumen and / or water. 4. The method of item X and 2, characterized in that the mixture Niedercrig alkoxylated alkyl amines, mixed with acid and the mixture is then added to the bitumen and / or water. 5. The method according to item 1 to 4, characterized in that stabilization is effected by addition of salts and / or non-ionic surfactants, 6. The method according to item i to 5, characterized in that are used as low alkoxylated alkyl amines low ethoxylated AlkylasTiine.