131.
    发明专利
    未知

    公开(公告)号:DE1543808A1

    公开(公告)日:1969-12-11

    申请号:DE1543808

    申请日:1966-05-04

    Applicant: OREAL

    Abstract: 1,143,589. 2 - Amino - 4 - hydroxytoluene. L'OREAL. 7 April, 1966 [6 May, 1965], No. 3274/68. Divided out of 1,143,588. Heading C2C. 2 - Amino - 4 - hydroxytoluene is prepared by reacting p-cresol with a compound capable of protecting the phenol function, nitrating the benzene ring of the reaction product in mposition with respect to the protected phenol function, reducing the nitro group to an amino group and then liberating the phenol function. In the example 4-hydroxytoluene is reacted with methane sulphochloride, the mesylated product is dissolved in sulphuric acid and nitrated with a mixture of nitric and sulphuric acids, the nitrated product is reduced with tin and hydrochloric acid and the amino compound produced is hydrolysed with sodium hydroxide to obtain 2-amino-4-hydroxy-toluene.

    132.
    发明专利
    未知

    公开(公告)号:DE1569812A1

    公开(公告)日:1969-11-27

    申请号:DE1569812

    申请日:1966-04-25

    Applicant: OREAL

    Abstract: 1,138,171. Nitro dyes. L'OREAL. 26 April, 1966 [26 April, 1965], No. 18289/66. Heading C4P. [Also in Division D1] 1 - Amino - 2 - nitro - 4 - (# - hydroxyethyl)- methylamino benzene is prepared by nitrating 1 - acetamido - 4 - (# - hydroxyethyl) - methylamino-benzene and de-acetylating the product. 1 - Methylamino - 2 - nitro - 4 - (# - hydroxyethyl)-methylamino is prepared by methylating the l-amino group of the above product after first protecting one of the hydrogen atoms of the said amino group and then removing the protecting group, e.g. a toxyl group. 1-(#- Hydroxyethyl) - amino - 2 - nitro - 4 - (#- hydroxyethyl) - methylamino benzene is prepared by reacting the first product above with chloroethyl-chloroformate and hydrolysing the product.

    133.
    发明专利
    未知

    公开(公告)号:DE1569816A1

    公开(公告)日:1969-11-06

    申请号:DE1569816

    申请日:1966-07-29

    Applicant: OREAL

    Abstract: Hair-colouring compositions contain in aqs. soln. at least one nitroparaphenylenediamine dye of formula: (in which R, R' and R" are H, lower alkyl or lower hydroxyalkyl, and R''' is where the amino group may be quaternized, and R1 and R2 are H, lower alkyl or lower hydroxyalkyl, or form a heterocyclic ring with the adjacent N-atom, and n is 2-6 when the NO2 group is ortho to the NR'R" radical, one of R' and R" can be H; when the NO2 group is ortho to the NR'R''' radical and R is H, R1 and R2 are not both ethyl and R' and R" are not both H; when the NO2 group is ortho to the NR'R" radical and R is H, R1 and R2 cannot both be ethyl and R" is not methyl when R' is H. When NO2 is meta to NRR''' only of R' may be H.) The compositions contains 0.1-3.8% dye and have a pH of 6-10. They are applied at room temp. for 5-30 minutes, the hair being subsequently rinsed, shampooed and dried. The dyes show great resistance to light and washing, and they can be used in combination with thickeners, detergents, solvents and lacquers.

    138.
    发明专利
    未知

    公开(公告)号:DK164841C

    公开(公告)日:1993-01-18

    申请号:DK439785

    申请日:1985-09-27

    Applicant: OREAL

    Abstract: The present invention relates to a composition for dyeing keratinic fibres, and human hair in particular, comprising the azo dye of formula: (II) optionally in combination with at least one nitro benzene dye or with at least one aminoanthraquinone dye or with at least one nitro benzene and at least one aminoanthraquinone dye. The azo dye of formula (II) is nonmutagenic, has good solubility properties in the usual dye carriers, and imparts to hair hues which are stable, particularly to washing. The invention also relates to a process for dyeing human hair by direct coloration which comprises applying the dyeing composition defined above onto the hair, leaving it on the hair for 3 to 60 minutes and then rinsing and drying the hair.

    139.
    发明专利
    未知

    公开(公告)号:DK164841B

    公开(公告)日:1992-08-31

    申请号:DK439785

    申请日:1985-09-27

    Applicant: OREAL

    Abstract: The present invention relates to a composition for dyeing keratinic fibres, and human hair in particular, comprising the azo dye of formula: (II) optionally in combination with at least one nitro benzene dye or with at least one aminoanthraquinone dye or with at least one nitro benzene and at least one aminoanthraquinone dye. The azo dye of formula (II) is nonmutagenic, has good solubility properties in the usual dye carriers, and imparts to hair hues which are stable, particularly to washing. The invention also relates to a process for dyeing human hair by direct coloration which comprises applying the dyeing composition defined above onto the hair, leaving it on the hair for 3 to 60 minutes and then rinsing and drying the hair.

Patent Agency Ranking