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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (9): 960-968.doi: 10.3969/j.issn.1001-1803.2022.09.007

• Development and application • Previous Articles     Next Articles

Study on the synthesis and application of thickening-fixing hybrid rheology modifier

Mai Jingzhang1,Li Lin1,He Jinqing2,Li Zeyong1,*()   

  1. 1. Guangzhou Tinci Materials Technology Co., Ltd., Guangzhou, Guangdong 510760, China
    2. Guangdong University of Technology, Guangzhou, Guangdong 510006, China
  • Received:2021-11-23 Revised:2022-09-01 Online:2022-09-22 Published:2022-09-23
  • Contact: Zeyong Li E-mail:lizeyong@tinci.com.

Abstract:

Acrylic acid (AA)/N-vinyl-2-pyrrolidinone (NVP) crosspolymer, AA/NVP/N-tert-butyl acrylamide (BAA) crosspolymer and AA/NVP/N-tert-octyl acrylamide (OAA) crosspolymer were synthesized via precipitation polymerization. The polymers were characterized by FT-IR, 1H NMR and differential scanning calorimetry (DSC). Glass transition temperature (Tg) of the polymers were measured by DSC. As the introduction of BAA and OAA, polymers’ Tg rise from 120.50 ℃ to 123.66 ℃ and 129.23 ℃, respectively, while the neutralized polymers’ Tg rise from 97.99 ℃ to 111.76 ℃ and 112.74 ℃, respectively. The viscosity, transmittance, hair curl retention, wetting time and dispersing performance of these samples were characterized to determine their thickening, fixing and dispersing performances. The AA/NVP/OAA crosspolymer shows the best parameters. This polymer sample was selected for further study, such as rheological test and hair gel application. Commercial hair gels usually can stick to the user’s fingers so that it can be picked up easily. The G' (0.1 rad/s)and G'' (100 rad/s) of various samples were determined by rotary rheometer so that rheological properties and pick up performance can be characterized. The G' (0.1 rad/s)and G'' (100 rad/s) of AA/NVP/OAA crosspolymer’s aquogel are comparable with the commercial hair gels, while the commercial carbomers and commercial AA/NVP copolymer show the opposite. These results indicate that AA/NVP/OAA crosspolymer’s aquogel can be easily picked up by users as the commercial hair gels. Hair gel formulation study was also carried out. Formula A is the hair gel prepared by AA/NVP/OAA crosspolymer, which shows comparable performance with the hair gel prepared by carbomer and PVP-K90 (Formula D). The transmittance of Formula A is 93.82%, viscosity is 59 000 mPa·s and the curl retention is 96.5%. Hair bending strength of Formula A is also comparable with Formula D. These results indicate that AA/NVP/OAA crosspolymer can act as both rheology modifier and hair fixing agent in the formula. Even though commercial AA/NVP polymer can also provide thickening and fixing functions, it shows poorer transmittance, lower curl retention and weaker bending strength in formula. The introduction of NVP and OAA can also improve the compatibility with PVP-K90.

Key words: precipitation polymerization, rheology modifier, hair fixing

CLC Number: 

  • TQ658