Amphipathic cation association polymer, preparation process, use and composition thereof
A polymer and composition technology, applied to amphiphilic cationic associative polymers, can solve the problem that the rheological properties and cosmetic properties of polymers are not optimal, and achieve excellent thickening properties, improved structure, and easy-to-use feeling. Effect
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Embodiment 1
[0076] The halide content (in meq / g) is given by: ( Vi - Vo ) × T × K m Wherein:-Vo: the volume addition (ml) of blank test-Vi: the volume addition (ml) of test-T: the titer (0.1N) of silver nitrate solution-k: the titration factor-m of silver nitrate solution: The mass (g) of the sample quaternization degree is equal to the ratio of the measured content to the theoretical content of 100% quaternization. Example 1: Polymers of the Invention
[0077] The reaction scheme is as follows:
[0078] In the first step, 1 mol of dimethylaminoethanol was quaternized with 1 mol of octadecane bromide (50% methyl ethyl ketone solution) after refluxing for 2 hours to prepare N-stearyl-N.N-dimethylethanolammonium bromide. The resulting product was diluted with acetone at 20-25 °C, filtered, washed with acetone and dri...
Embodiment 2
[0082] The degree of quaternization was 91% (0.06 meq / g; theory=0.066 meq / g). Example 2: Control polymer Reagent : Polyoxyethylene (PEG) (M n 10000): 0.010mol methylene dicyclohexyl diisocyanate: 0.018mol N,N-dimethylethanolamine: 0.020mol stearyl bromide: 0.024mol tin octoate (catalyst): 0.2%
[0083] 0.010 mol (100 g) of poly(oxyethylene) having a number average molecular weight of 10000 was dissolved in 105 g of THF containing 0.2% tin octoate (catalyst), and then 0.018 mol (4.71 g) of methylene dicyclohexyl diisocyanate was added dropwise. The reaction medium is heated for 15 hours at the reflux temperature of THF, after 6 hours 100 ml of THF are added. During the reaction, the incomplete disappearance of the NCO moiety of the isocyanate can be observed by FTIR, while the CO and NH moieties of the formed amide bond appear. The medium is viscous and transparent. Then add 0.020mol (1.78g) of N,N-dimethylethanolamine, and continue to react for 4 hours at the reflux temp...
Embodiment 3
[0084] The degree of quaternization is 30% (0.02 meq / g; theory=0.066 meq / g). Embodiment 3: Concentration determination
[0085] An aqueous solution containing 7% by weight polymer in deionized water was prepared using magnetic stirring for a minimum of 12 hours at room temperature. The solutions were stored at 27°C for a minimum of 12 hours before their rheological properties were determined.
[0086] Viscosity measurement was carried out at 27° C. using a Haake RS150 controlled stress rheometer equipped with a cone-plate with a diameter of 35 mm and a cone angle of 2°. The sample is subjected to a gradient of increasing shear force with a logarithmic distribution between 0.1-1000Pa. The ramp up time was 2 minutes and 30 seconds. Viscosity values are determined in the first Newtonian region of the rheogram, where the viscosity η 0 (η 0 =τ / V c) (sometimes called rest viscosity) is constant independent of the applied stress (τ) or the measured shear rate (V c )Impact. ...
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