Solvent-free waterborne polyurethane capable of being continuously produced and preparation method of solvent-free waterborne polyurethane

[0044]Example 1

[0045]Step 1: accurate weighing

[0046]92 parts of isophorone diisocyanate;

[0047]300 parts of polytetrahydrofuran glycol (number average molecular weight is 2000);

[0048]1.5 parts neopentyl glycol;

[0049]38 parts of Ymer-N120 non-ionic hydrophilic glycol of Perstorp Group;

[0050]750 parts of deionized water;

[0051]Step 2: Add polytetrahydrofuran diol and Perstorp’s Ymer-N120 non-ionic hydrophilic diol into the reaction kettle and vacuum dehydration at 120°C for 1 hour;

[0052]Step 3: Cool the reactor to 70°C, add isophorone diisocyanate at a stirring speed of 300r / min, control the temperature to 80°C, and react for 2h;

[0053]Step 4: Add neopentyl glycol to the reaction kettle, control the temperature at 80°C, and react for 2 hours;

[0054]Step 5: Add 10 parts of emulsifier DNS-18 to the reaction kettle, control the temperature at 60°C, and react for 0.5h;

[0055]Step 6: Pass the prepolymer and deionized water through a static mixer, then through a high-gravity dispersion reactor, a

[0056]Example 2

[0057]Step 1: accurate weighing

[0058]215 parts of dicyclohexylmethane diisocyanate;

[0059]205 parts of polytetrahydrofuran diol (number average molecular weight is 1000);

[0060]100 parts polypropylene glycol (number average molecular weight is 2000);

[0061]2 parts of 1,4-butanediol;

[0062]46 parts of Ymer-N120 non-ionic hydrophilic glycol of Perstorp Group;

[0063]792 parts of deionized water;

[0064]Step 2: Add polytetrahydrofuran diol, polypropylene glycol and Perstorp’s Ymer-N120 non-ionic hydrophilic diol into the reaction kettle and vacuum dehydration at 120°C for 1.5 hours;

[0065]Step 3: Cool the reactor to 70°C, add dicyclohexylmethane diisocyanate at a stirring speed of 300r / min, control the temperature to 85°C, and react for 2h;

[0066]Step 4: Add 1,4-butanediol to the reaction kettle, control the temperature at 80°C, and react for 2 hours;

[0067]Step 5: Add 20 parts of emulsifier DNS-500 to the reaction kettle, control the temperature at 60°C, and react for 2 hours;

[0068

[0069]Example 3

[0070]Step 1: accurate weighing

[0071]115 parts of toluene diisocyanate;

[0072]210 parts of polytetrahydrofuran glycol (number average molecular weight is 2000);

[0073]100 parts of polybutylene adipate diol (number average molecular weight is 1000);

[0074]2 parts of 1,6-hexanediol;

[0075]42 parts of Ymer-N120 non-ionic hydrophilic glycol of Perstorp Group;

[0076]945 parts of deionized water;

[0077]Step 2: Add polytetrahydrofuran diol, polybutylene adipate diol and Perstorp’s Ymer-N120 non-ionic hydrophilic diol into the reaction kettle and vacuum dehydration at 120°C for 1 hour;

[0078]Step 3: Cool the reactor to 50°C, add toluene diisocyanate at a stirring speed of 300r / min, control the temperature to 70°C, and react for 2h;

[0079]Step 4: Add 1,4-butanediol to the reaction kettle, control the temperature at 85°C, and react for 2.5 hours;

[0080]Step 5: Add dimethylethanolamine to the reaction kettle, control the temperature at 40°C, and react for 0.5h;

[0081]Step 6: Pass the prepo