Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/04—Carboxylic acids or salts thereof
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/62—Quaternary ammonium compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/001—Softening compositions
  • C11D3/0015—Softening compositions liquid
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/50—Perfumes
  • C11D3/502—Protected perfumes
  • C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Definitions

• the present invention relates to fabric softening compositions, in particular the invention relates to aqueous dispersions of biodegradable fabric softening compositions comprising a water insoluble cationic fabric softening agent and perfume.
• the compositions are stable on storage and exhibit excellent perfume delivery when removed from a washing machine.
• Rinse added fabric softener compositions are well known. Typically such compositions contain a water insoluble quaternary ammonium fabric softening agent dispersed in water at a level of softening agent up to 7% by weight in which case the compositions are considered dilute, or at levels from 7% to 50% in which case the compositions are considered concentrates.
• fabric softening compositions desirably have other benefits such as delivering perfume onto fabrics.
• the fabric conditioning market is moving towards more concentrated compositions.
• One of the problems associated with such fabric softening compositions is that on storage they are physically unstable. This problem is accentuated by the presence of a perfume; the greater the level of perfume the worse the stability problem becomes.
• compositions comprising biodegradable ester-linked quaternary ammonium compounds the problem of physical instability is more acute than with traditional quaternary ammonium compounds.
• CA 1 111 616 discloses a fabric softening composition comprising 0.1 to 10 wt% of a cationic fabric softener and 0.1 wt% to 20 wt % of particles.
• the particles are comprised of a carrier substance and a perfume and have a melting point of from 38°C to 150°C, preferably from 65°C to 100°C.
• fabric softening compositions comprising quaternary ammonium compounds may exhibit excellent perfume substantivity and good storage stability.
• a fabric softening composition comprising:
• the slip point of the perfume/carrier substance mix is measured as defined by British Standard BS 684 section 1.3 1991 ISO 6321:1991 (UK).
• a further aspect of the invention is provided by a process for preparing a fabric softening composition as defined above, which comprises of the following steps:
• a further advantage afforded by the present invention is that the degree of fabric softening may be varied to suit different customer requirements in different markets, while maintaining high perfume delivery.
• the invention also allows perfume to be incorporated without excessive perfume intensity from the undiluted product.
• the perfume carrier substance mix has a slip point below 37°C; preferably from 0 to 37°C. More preferably it has a slip point between 20°C and 37°C.
• compositions of the invention are liquids, more preferably comprising an aqueous base.
• the carrier substance is an organic material. It is further preferred if the carrier substance is a fatty ester of a mono or polyhydric alcohol having from 1 to about 24 carbon atoms in the hydrocarbon chain with the proviso that the total number of carbon atoms in the carrier substance is equal to or greater than 16 and that at least one of the hydrocarbons radicals in the ester has 12 or more carbon atoms. Such fatty esters are preferably odourless.
• the carrier substance in the perfume/carrier substance mix is a fatty acid glyceride or mixtures of fatty acid glycerides.
• Especially preferred carrier substances are triglycerides, most preferred are palm oil and tallow oil.
• the perfume/carrier substance mix is preferably present at a level of from 1 to 10% of the composition, more preferably 3 wt% to 7 wt% of the total composition.
• the ratio of perfume to carrier substance is from 1:50 to 1:1, more preferably 1:20 to 1:2, most preferably 1:7 to 1:2.
• the ratio of perfume/carrier substance mix to quaternary ammonium fabric softening agent is in the ratio of 5:1 to 1:10, more preferably 2:1 to 1:10.
• the quaternary ammonium compound is biodegradable and has at least one ester link.
• the fabric softening composition comprises a water insoluble cationic compound having two C 12-28 alkyl or alkenyl groups connected to the N atom via one or more ester links.
• a preferred type of ester-linked quaternary ammonium fabric softening agent for use in the compositions according to the invention can be represented by the formula: wherein each R 1 group is independently selected from C 1-4 alkyl, or hydroxyalkyl or C 2-4 alkyl groups; and wherein each R 2 group is independently selected from C 8-28 alkyl or alkenyl groups;
• a second preferred type of quaternary ammonium fabric softening agent can be represented by the formula: wherein R 1 , n and R 2 are as defined above.
• Preferred materials of this class and their method of preparation are, for example, described in US 4 137 180 (Lever Brothers).
• these materials comprise small amounts of the corresponding monoester as described in US 4 137 180, for example 1-tallowoxy, 2-hydroxytrimethyl ammonium propane chloride.
• the level of ester linked quaternary ammonium compounds is at least 1% by weight of the composition, more preferably more than 7% by weight of the composition; especially interesting are concentrated compositions which comprise between 10 and 30 % by weight of ester-linked quaternary ammonium compound.
• compositions of the invention may also contain nonionic stabilisers.
• Suitable nonionic stabilisers which can be used include the condensation products of C 8 - C 22 primary linear alcohols with 10 to 25 moles of ethylene oxide. Use of less than 10 moles of ethylene oxide, especially when the alkyl chain is in the tallow range, leads to unacceptably high aquatic toxicity.
• nonionic stabilisers are preferred: Genapol T-110, Genapol T-150, Genapol T-200, Genapol C-200 all ex Hoechst AG, Lutensol AT18 ex BASF, Genapol C-100 and Genapol C-150 ex Hoechst, or fatty alcohols for example Laurex CS, ex Albright and Wilson or Adol 340 ex Sherex (all Trade Marks).
• the nonionic stabilizer has an HLB value of from 10 to 20, more preferably 12 to 20.
• the level of nonionic stabiliser is within the range of from 0.1 to 10% by weight, more preferably from 0.5 to 5% by weight, most preferably from 1 to 4% by weight.
• the composition can also contain fatty acids, for example C 8 - C 24 alkyl or alkenyl monocarboxylic acids, or polymeric carboxylic acids.
• fatty acids for example C 8 - C 24 alkyl or alkenyl monocarboxylic acids, or polymeric carboxylic acids.
• saturated fatty acids are used, in particular, hardened tallow C 16 -C 18 fatty acids.
• the level of fatty acid material is preferably more than 0.1% by weight, more preferably more than 0.2% by weight. Especially preferred are concentrates comprising from 0.5 to 20% by weight of fatty acid, more preferably 1% to 10% by weight.
• the weight ratio of quaternary ammonium material to fatty acid material is preferably from 10:1 to 1:10.
• compositions of the invention preferably have a pH of more than 1.5, more preferably less than 5.
• the composition can also contain one or more optional ingredients, selected from non-aqueous solvents, pH buffering agents, perfumes, perfume carriers, fluorescers, colorants, hydrotropes, antifoaming agents, antiredeposition agents, enzymes, optical brightening agents, opacifiers, anti-shrinking agents, anti-wrinkle agents, anti-spotting agents, germicides, fungicides, anti-oxidants, anti-corrosion agents, drape imparting agents, antistatic agents and ironing aids.
• optional ingredients selected from non-aqueous solvents, pH buffering agents, perfumes, perfume carriers, fluorescers, colorants, hydrotropes, antifoaming agents, antiredeposition agents, enzymes, optical brightening agents, opacifiers, anti-shrinking agents, anti-wrinkle agents, anti-spotting agents, germicides, fungicides, anti-oxidants, anti-corrosion agents, drape imparting agents, antistatic agents and ironing aids.
• composition may also contain nonionic fabric softening agents.
• compositions were prepared by the following method: antifoam, preservative and dyestuff were dissolved in warm (40°C) water followed by addition of electrolyte (citric or CaCl 2 )to form an aqueous solution.
• the resulting mixture was recirculated through a Janke and Kunkel mill set at max shear (10,000 rpm). This recirculation/shearing continued for 30 mins after premix addition. Perfume was stirred directly into the mix or a premixed with palm/tallow oil at a temperature of 40-45°C and then added by milling into the product over a 10 min period at 8000 rpm.
• Viscosity measurements were taken at 25° and at 106 sec -1 , shear rate using a Haake VT501 rotoviscometer.
• Examples A and B went solid within 3 days at 37°C storage. Examples 1 and 2 showed viscosities as follows: TABLE 3 Time @ 37°C Viscosity 1 2 Initial 69 cP 118 cP 10 days - 122 cP 12 days 65 cP - 22 days - 125 cP 28 days 93 cP - 29 days - 121 cP 38 days - 118 cP 66 days - 129 cP
• Examples 3 and 4 showed viscosities as follows: TABLE 4 Time @ 37°C Visc 3 4 Initial 64 cP 38 cP 7 days - 34 cP 10 days 68 cP - 19 days - 33 cP 21 days 82 cP - 43 days - 36 cP 56 days 87 cP - 58 days - 39 cP 71 days 99 cP -
• Examples were prepared by dispersing the cationic fabric softening agent in water, followed by the addition of the perfume or perfume/carrier substance mix.
• the perfume substantivity was tested by adding 1g of the resulting composition to 1 litre of water at ambient temperature and agitating for 2 minutes to disperse. Four 19 x 19 squares of terry towelling were than immersed in the dispersion and left for 5 minutes. The terry towelling was then removed from the dispersion, wrung dry and line dried overnight.
• the terry towelling samples were evaluated by a panel of people using a random design to measure perfume strength.
• a score of 0 indicates a no perfume impact.
• a score of 5 indicates a very strong perfume impact.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Cosmetics (AREA)
• Detergent Compositions (AREA)

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• 1994
  • 1994-02-21 GB GB9403242A patent/GB9403242D0/en active Pending
• 1995
  • 1995-02-17 EP EP97105358A patent/EP0787793B1/de not_active Expired - Lifetime
  • 1995-02-17 ES ES95911247T patent/ES2123962T3/es not_active Expired - Lifetime
  • 1995-02-17 AU AU18911/95A patent/AU698882B2/en not_active Ceased
  • 1995-02-17 DE DE69505358T patent/DE69505358T2/de not_active Expired - Lifetime
  • 1995-02-17 ES ES97105358T patent/ES2212008T3/es not_active Expired - Lifetime
  • 1995-02-17 BR BR9506843A patent/BR9506843A/pt not_active IP Right Cessation
  • 1995-02-17 WO PCT/EP1995/000624 patent/WO1995022594A1/en not_active Ceased
  • 1995-02-17 DE DE69532508T patent/DE69532508T2/de not_active Expired - Lifetime
  • 1995-02-17 EP EP95911247A patent/EP0746603B1/de not_active Expired - Lifetime
  • 1995-02-21 ZA ZA951428A patent/ZA951428B/xx unknown

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