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CN-122005342-A - Amino silicone oil emulsion, preparation method and application thereof and hair care composition

CN122005342ACN 122005342 ACN122005342 ACN 122005342ACN-122005342-A

Abstract

The application relates to the field of amino silicone oil emulsion, in particular to amino silicone oil emulsion, a preparation method and application thereof, wherein the raw materials of the amino silicone oil emulsion comprise: an aminosilane coupling agent, a cyclotetradimethylsiloxane, an alkoxy-containing disiloxane endcapping agent, an emulsifier, a catalyst, and water, said emulsifier comprising a cationic emulsifier. The amino silicone oil emulsion has high solid content, moderate grain diameter, strong stability, even spreading on hair, excellent film forming property, favorable silicone deposition and excellent nursing effect.

Inventors

  • HUO MENGYUE
  • WU YINGCHANG
  • SUN JILONG

Assignees

  • 广州天赐高新材料股份有限公司
  • 九江天赐高新材料有限公司

Dates

Publication Date
20260512
Application Date
20260309

Claims (17)

  1. 1. The amino silicone oil emulsion is characterized by comprising an amino silane coupling agent, cyclotetradimethylsiloxane, an alkoxy-containing disiloxane blocking agent, an emulsifying agent, a catalyst and water, wherein the emulsifying agent comprises a cationic emulsifying agent.
  2. 2. The aminosilicone emulsion of claim 1 wherein the alkoxy-containing disiloxane blocking agent has the structure of formula I: A formula I; Wherein R 1 is H or C 1 -C 3 alkyl, R 2 is C 1 -C 3 alkyl or C 1 -C 3 alkoxy; preferably, the alkoxy-containing disiloxane blocking agent comprises at least one of 1, 3-tetramethoxy-1, 3-dimethyldisiloxane and 1, 3-tetraethoxy-1, 3-dimethyldisiloxane.
  3. 3. The aminosilicone emulsion of claim 1, wherein the aminosilane coupling agent comprises at least one of aminoethylaminocutyl methyldimethoxy silane, N- β - (aminoethyl) - γ -aminopropyl methyldimethoxy silane, 3- (N-cyclohexylamine) propylmethyldimethoxy silane, N-butylaminopropyl trimethoxy silane, N- (N-butyl) -3-aminopropyl triethoxy silane, r-aminopropyl methyldiethoxy silane; the catalyst comprises at least one of sodium hydroxide, potassium hydroxide and tetramethyl ammonium chloride.
  4. 4. The amino silicone oil emulsion of claim 1, wherein the cationic emulsifier comprises at least one of cetyltrimethylammonium chloride, behenyl trimethylammonium chloride, didodecyl dimethylammonium bromide, benzalkonium chloride, fatty imidazolines, alkylpyridine halides, polyoxyethylalkyl quaternary ammonium salts, 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolines; the emulsifier further comprises a nonionic emulsifier, and the nonionic emulsifier preferably comprises fatty alcohol polyoxyethylene ether with an HLB value of 5-16.
  5. 5. The amino silicone oil emulsion according to claim 4, wherein the nonionic emulsifier comprises fatty alcohol polyoxyethylene ether with a carbon chain length of 12-14 and an ethoxy number of 5-12; preferably, the nonionic emulsifier comprises at least one of isomeric tridecanol polyoxyethylene ether-12 and isomeric tridecanol polyoxyethylene ether-7.
  6. 6. The aminosilane emulsion according to claim 1, characterized in that the aminosilane coupling agent content is 1% -10% based on the total mass of the raw materials of the aminosilane emulsion.
  7. 7. The amino silicone oil emulsion according to claim 1, wherein the content of the cyclotetradimethylsiloxane is 20% -40% and the content of the alkoxy group-containing disiloxane blocking agent is 0.02% -2% based on the total mass of the raw materials of the amino silicone oil emulsion.
  8. 8. Amino silicone emulsion according to claim 4 or 5, characterized in that the content of the emulsifier is 2% -14% based on the total mass of the raw materials of the amino silicone emulsion; The mass ratio of the cationic emulsifier to the nonionic emulsifier is (1-7), namely (1-7).
  9. 9. The amino silicone oil emulsion according to claim 1, wherein the catalyst content is 0.3% -1% and the water content is 34% -76% based on the total mass of the raw materials of the amino silicone oil emulsion.
  10. 10. The amino silicone oil emulsion according to claim 1, wherein the pH value of the amino silicone oil emulsion is 5.0-7.0.
  11. 11. A process for preparing an aminosilicone emulsion as defined in any one of claims 1 to 10 comprising: Mixing an aminosilane coupling agent, cyclotetradimethylsiloxane, an alkoxy-containing disiloxane end-capping agent, an emulsifier, a catalyst and water, and obtaining the aminosilicone emulsion through a ring-opening reaction.
  12. 12. The method according to claim 11, wherein the method further comprises: Mixing the aminosilane coupling agent, the cyclotetradimethylsiloxane, the disiloxane blocking agent containing alkoxy groups, part of the emulsifier and part of the water to obtain a pre-emulsion; Mixing the catalyst, the rest of the emulsifier and the rest of the water to obtain a mixture; mixing the mixture with the pre-emulsion, and performing ring opening reaction to obtain an intermediate emulsion; And regulating the pH value of the intermediate emulsion to 5.0-7.0 to obtain the amino silicone oil emulsion.
  13. 13. The method of claim 12, wherein the aminosilane coupling agent, cyclomethicone, alkoxy-containing disiloxane endcapping agent, a portion of the cationic emulsifier, a portion of the nonionic emulsifier, and a portion of the water are mixed to provide the pre-emulsion; Mixing the catalyst, the remaining cationic emulsifier, the remaining nonionic emulsifier and the remaining water to obtain the mixture; Wherein, the part of the cationic emulsifier accounts for 40 wt-60 wt% of the total amount of the cationic emulsifier, and the part of the nonionic emulsifier accounts for 40 wt-60 wt% of the total amount of the nonionic emulsifier.
  14. 14. The method according to claim 12 or 13, wherein the pre-emulsion is added dropwise to the mixture for a period of 2-3 hours at a temperature of 60-90 ℃; the time of the ring-opening reaction is 4-8 hours.
  15. 15. The method according to claim 12, wherein the method further comprises: And regulating the temperature of the intermediate emulsion to be 30-40 ℃ and the pH value to be 5.0-7.0, so as to obtain the amino silicone oil emulsion.
  16. 16. A hair care composition comprising the amino silicone oil emulsion according to any one of claims 1 to 10 or the amino silicone oil emulsion according to any one of claims 11 to 15.
  17. 17. A hair care method comprising applying the amino silicone oil emulsion of any one of claims 1 to 10 or the hair care composition of claim 16 to hair.

Description

Amino silicone oil emulsion, preparation method and application thereof and hair care composition Technical Field The application relates to the field of amino silicone oil emulsion, in particular to amino silicone oil emulsion, a preparation method and application thereof and a hair care composition. Background The polydimethylsiloxanes having amino functions are long-chain organosilicon compounds which contain repeating Si-O-Si bond units and are generally characterized by amine numbers meq/g and viscosities mPas. The hair of people in modern life is exposed to sun, environmental pollution, carding and stretching, hair drier, hair curler and hair dyeing rinsing probability is increasing, and the hair quality is damaged to different degrees. The amino polydimethylsiloxane with the viscosity exceeding 20000 mPa.s and the amine value of 0.06-0.1meq/g can effectively improve the hydrophobic property of hair compared with the dimethyl silicone, so that the hair has excellent soft and smooth hand feeling. The existing preparation method of the amino silicone oil emulsion comprises two methods, namely a bulk polymerization method, namely that the emulsion is prepared by a mechanical emulsification method after the amino silicone oil emulsion is synthesized, and a direct preparation method of the emulsion by polymerization reaction in the emulsion. However, the conventional emulsion preparation method has the problems that (1) it is difficult to emulsify high-viscosity and high-amine-value amino polydimethylsiloxane into uniform and stable emulsion with small particle size, and (2) it is difficult for the amino silicone oil emulsion obtained in the emulsion polymerization process to reach high internal phase amino silicone oil viscosity, and the film forming property is reduced, so that the use effect is greatly reduced. Disclosure of Invention The present application aims to solve one of the technical problems in the related art at least to some extent. To this end, the application provides amino silicone oil emulsions, methods of making and using the same, and hair care compositions. The amino silicone oil emulsion has high solid content, strong stability, moderate grain diameter, even spreading on hair, excellent film forming property, favorable silicone deposition and excellent nursing effect. To this end, the first aspect of the present application provides an aminosilicone emulsion. According to the embodiment of the application, the amino silicone oil emulsion comprises an amino silane coupling agent, cyclotetradimethylsiloxane, an alkoxy-containing disiloxane end-capping agent, an emulsifying agent, a catalyst and water, wherein the emulsifying agent comprises a cationic emulsifying agent. In the amino silicone oil emulsion according to the embodiment of the application, an oil phase (an amino silane coupling agent, cyclotetradimethylsiloxane and an alkoxy-containing disiloxane blocking agent) can be dispersed in a water phase under the action of an emulsifier to form a stable O/W emulsion. Under the catalysis of a catalyst, cyclotetradimethylsiloxane is subjected to ring opening to generate a polysiloxane chain containing an active end group, the active end group and alkoxy of an aminosilane coupling agent are subjected to condensation reaction, an amino side chain is connected into a main chain, one end of a disiloxane end capping agent containing the alkoxy is condensed with the active end group to realize end capping, control the molecular weight, and the other end of the disiloxane end capping agent containing the alkoxy is reserved as a crosslinking site. When the subsequent emulsion acts on the hair, residual alkoxy is hydrolyzed to generate silicon hydroxyl (HO-Si-) after contacting with moisture on the surface of the hair, and the silicon hydroxyl and Si-OR OR silicon hydroxyl of other molecular chains undergo self-condensation reaction to form a-Si-O-Si-crosslinking bond, so that a crosslinking network structure is constructed, and the stability and film forming property of the emulsion are improved. In addition, the amino silicone oil molecular chain is provided with positively charged amino functional groups, after the cationic emulsifier is dissociated in water, the hydrophilic end of the cationic emulsifier is positively charged and can be contacted with water, and the hydrophobic end of the cationic emulsifier is inserted into silicone oil drops, so that the surface of formed emulsion particles is surrounded by a layer of positive charges to form a stable positive layer. Because the amino groups on the amino silicone oil molecular chain also tend to be positively charged, the amino groups are compatible with the charge property of the cationic emulsifier, a compact and firm adsorption layer can be formed, more stable and finer emulsion can be formed, and meanwhile, the cationic amino silicone oil emulsion can be better adsorbed on the surfaces of most negatively charged hairs, so that excel