Fabric care composition comprising a block copolymer having a methoxyethyl acrylate core polymer and an alkyl methacrylate flanking polymer

1. A fabric care composition comprising:

a) a thermoplastic elastomer which is a block copolymer comprising a core polymer which is a polymer of (2-methoxyethyl) acrylate, and two or more flanking polymers, wherein the flanking polymers are polymers of a C 1-4 alkyl methacrylate, each flanking polymer being covalently bound to an end of the core polymer, wherein the copolymer is soluble at a level of at least 1% by weight in water or aqueous ethanol at 25° C.;

b) 10 to 70% by weight of a builder or from 8 to 50% of a substantially water insoluble quaternary ammonium compound; and

c) a textile compatible carrier.

2. A composition as claimed in claim 1 , wherein the core polymer has a Tg of from −150° C. to 50° C.

3. A composition as claimed in claim 1 , wherein the flanking polymers have a Tg of from 30° C. to 150° C.

4. A composition as claimed in claim 1 , wherein the block copolymer is linear or star-shaped.

5. A composition as claimed in claim 1 , wherein the block copolymer is a linear ABA block copolymer.

6. A composition as claimed in claim 1 , which comprises from 0.1 to 20% by weight of the block copolymer.

7. A composition as claimed in claim 1 , wherein the core polymer has a weight average molecular weight of from 1 kDa to 500 kDa.

8. A composition as claimed in claim 1 , wherein the flanking polymers have a weight average molecular weight of from 200 Da to 250 kDa.

9. A composition as claimed in claim 1 , wherein the molar ratio of the core polymer to the flanking polymers is from 1:10 to 10:1.

10. A composition as claimed in claim 1 , wherein the polymer has a viscosity of less than 15 cp as determined for 5 wt % polymer in 50 vol % aqueous ethanol solution at 25° C. using capillary viscometry and assuming a viscosity for deionised water of 1 mPas.

11. A composition as claimed in claim 1 , wherein the block copolymer has an elastic modulus of less than 0.45 Gpa.

12. A composition as claimed in claim 1 , which further comprises a fragrance or perfume.

13. A composition as claimed in claim 1 , which is in a form suitable for spraying onto a fabric.

14. A method of treating fabric which comprises treating the fabric with a fabric care composition according to claim 1 as part of a laundering process.

15. A method as claimed in claim 14 , wherein the fabric is treated with the composition during the wash or rinse cycle.

16. A method as claimed in claim 14 , wherein the composition is applied to the fabric prior to drying and/or ironing.

17. A method of improving the crease recovery properties and/or elasticity and/or shape retention of a fabric which comprises treating the fabric with a thermoplastic elastomer as defined in claim 1 .

18. A method of improving the crease recovery properties and/or elasticity and/or shape retention of a fabric which comprises treating the fabric with a composition according to claim 1 .