Process for reducing hair damage upon treatment of hair by heat

A process for reducing hair damage upon treatment of hair by heat comprising the steps of:

• (1) providing a leave-in hair care composition comprising a silicone material and a cosmetically acceptable carrier, wherein the silicone material is a polydimethylsiloxane and is stable at a temperature up to 300° C.;
• (2) applying onto hair a sufficient amount of the hair care composition for treating hair;
• (3) providing a heat generating hair care appliance being a hot surface hair care appliance, wherein the hot surface hair care applicance is a hair straightener;
• (4) treating hair at a temperature ranging from about 90° C. to about 250° C. using the heat generating hair care appliance for from about 1 min to about 20 min for drying and/or styling hair;
• wherein the polydimethylsiloxane (P) has aminoalkyl groups and has an amine number of at least 0.1 meq/g of polydimethylsiloxane (P), and comprises units of formula I
• R1aR2bSiO(4-a-b)/2 (I),
• in which R1 is methyl, an —OR radical, or an —OH radical,
• R2 are aminoalkyl radicals of formula II
• —R3—NR4R5 (II),
• R3 is —(CH2)3—,
• R4 is H,
• R5 is —(CH2)2-NH2—,
• a is 0, 1, 2 or 3,
• b is 0, 1, 2 or 3, and
• a+b on average is from 1.5 to 2.5, wherein not more than 9 mol % of the radical R1 is OH or OR.