Additives for bitumen containing compositions

1. A composition which is not a bitumen-in-water emulsionl comprising

a) bitumen, and

b) a compound according to formula (I)

 wherein

R 1 is C 1-6 hydrocarbyl or a group C 1-6 hydrocarbyl-N(R 4 )—(CH 2 ) n —;

each one of R 2 and R 3 is independently a group —(CH 2 CH 2 O) p (CH 2 CH(X)O) q (CH 2 CH 2 O) r R 5 ;

R 4 is methyl, ethyl or benzyl or a group —(CH 2 CH 2 O) p (CH 2 CH(X)O) q (CH 2 CH 2 O) r R 5 ;

R 5 is independently H, —R 6 or —C(O)R 6 , where R 6 is a C 1-6 hydrocarbyl;

n is a value of from 2 to 4;

X is methyl;

Σp is a value of from 30 to 60;

Σq is a value of from 10 to 100;

Σr is a value of from 0 to 100;

with the proviso that

at least one of Σp and Σr is ≧35,

an acid salt thereof, or the resulting compound from reacting a compound according to formula (I) with a quaternizing agent; and

c) an anti-stripping agent different from the compound of formula (I) selected from the group consisting of fatty acid esters of quaternary alkanol amines, fatty amines, fatty polyamines, ethoxylated fatty amines, ethoxylated fatty polyamines, alkyl amido polyamines, alkyl imidazolines, alkyl imidazoline amines and alkyl imidazoline polyamines, and the products from the reaction between fatty acids or vegetable or animal oil and diethanolamine followed by the reaction with polyamines.

2. A composition according to claim 1 , wherein R 5 is H.

3. A composition according to claim 1 , wherein Σp is from 30 to 60, Σq is from 10 to 80, and Σr is 0.

4. A composition according to claim 1 , wherein said anti-stripping agent is selected from the group consisting of C 6-30 alkyl-imidazolines, C 6-30 alkyl-imidazoline amines and C 6-30 alkyl-imidazoline polyamines.

5. A composition according to claim 1 , wherein b) and c) are present in a weight ratio of from 95:5 to 5:95.

6. A composition according to claim 1 , wherein a) and b) are present in a weight ratio (a):(b) of from 99.9:0.1 to 95:5.

7. A composition according to claim 1 , wherein a) and b) together constitutes at least 50 wt % based on the total weight of the composition.

8. A composition according to claim 1 , further comprising d) aggregates.

9. A method for arranging a paving on a surface, comprising the steps of

providing a composition according to claim 8 ;

laying down a layer of said composition on a surface;

and compacting said layer.

10. A composition according to claim 8 , comprising from 1 to 15 wt % of the total of a), b) and c), and from 75 to 99 wt % of d), based on the weight of the total composition.

11. A composition according to claim 1 , comprising less than 10 wt % water, based on the total weight of a) and b) in the composition.

12. A method of producing a composition according to claim 1 , comprising

providing bitumen;

adding to said bitumen a compound of formula (I) as defined in claim 1 or an acid salt thereof, or the resulting compound from reacting a compound of formula (I) with a quaternizing agent, and,

an anti-stripping agent different from the compound or formula (I), which anti-stripping agent is selected from the group consisting of fatty acid esters of quaternary alkanol amines, fatty amines, fatty polyamines, ethoxylated fatty amines, ethoxylated fatty polyamines, alkyl amido polyamines, alkyl imidazolines, alkyl imidazoline amines and alkyl imidazoline polyamines, the products from the reaction between fatty acids or vegetable or animal oil and diethanolamine followed by the reaction with polyamines, to form a bituminous binder composition and

mixing said bituminous binder composition with aggregates.

13. A composition according to claim 1 , wherein a), b) and c) are present in a weight ratio (a):(b+c) of from 99.9:0.1 to 95:5.

14. A composition according to claim 1 , wherein a), b) and c) together constitutes at least 50 wt % based on the total weight of the composition.

15. A composition according to claim 1 , comprising less than 10 wt % water, based on the total weight of a), b) and c) in the composition.