Polyurethane thickener compound with mixed side long-chain alkyl groups and preparation method thereof
A polyurethane thickener and long-chain alkyl technology, which is applied in the field of polyurethane thickener compound and its preparation, can solve the problem that the thickener cannot be fully dissolved or dispersed, affects product quality and use effect, and is inconvenient to organize large-scale Production and other problems, to achieve the effect of enriching thickening, reducing critical association concentration, and improving integrity
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[0057] One aspect of the present invention provides a method for preparing a polyurethane thickener compound with mixed pendant long-chain alkyl groups, the method comprising the following steps
[0058] (1) Preparation of raw materials: the raw materials contain polymerized monomers, solvents and auxiliary agents; wherein, the polymerized monomers include diisocyanate, polyethylene glycol, single-ended dihydroxy aliphatic diols and higher aliphatic alcohols; the solvent is an organic solvent; The auxiliary agent is a polymerization catalyst;
[0059] Diisocyanate is a kind of in isophorone diisocyanate and hexamethylene diisocyanate;
[0060] Polyethylene glycol is a kind of polyethylene glycol with a moisture content of not higher than 2‰ and a molecular weight of 4000-8000;
[0061] Single-ended dihydroxy aliphatic diol is 1,2-C 6~12 2 of the diols and 2 of the 1,2-C 6~12 The difference in carbon chain length between the diols is 3 to 6, and the two types of 1,2-C 6~12 ...
Embodiment 1
[0104] The preparation process of high-concentration polyurethane thickener S1 with mixed side long-chain alkyl groups is as follows:
[0105] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;
[0106] (2) prepolymerization: carry out prepolymerization reaction of polyethylene glycol with diisocyanate, polymerization catalyst and part of organic solvent to obtain polyurethane thickener prepolymer with mixed side long-chain alkyl groups;
[0107] (2.1) drop the organic solvent of diisocyanate and total amount 25% into reactor, be warming up to 72 ℃;
[0108] (2.2) in 50min, slowly drop into polyethylene glycol and maintain stirring, control reaction system temperature to be 72 ℃;
[0109] (2.3) after maintaining the temperature of the reaction system at 72°C and maintaining the reaction for 50min, drop into the polymerization catalyst at a uniform speed within 12min;
[0110] (2.4) heating up and controllin...
Embodiment 2
[0142] The preparation process of the high-concentration polyurethane thickener S1 with mixed pendant long-chain alkyl groups is the same as that of Example 1.
[0143] The preparation process of high-concentration polyurethane thickener S3 with mixed side long-chain alkyl groups is as follows:
[0144] (1) raw material preparation, the concrete selection and consumption of described raw material are as shown in table 1;
[0145] (2) prepolymerization: carry out prepolymerization reaction of polyethylene glycol with diisocyanate, polymerization catalyst and part of organic solvent to obtain polyurethane thickener prepolymer with mixed side long-chain alkyl groups;
[0146] (2.1) drop the organic solvent of diisocyanate and total amount 30% into reactor, be warming up to 78 ℃;
[0147] (2.2) in 58min, slowly drop into polyethylene glycol and maintain stirring, control reaction system temperature to be 78 ℃;
[0148] (2.3) after maintaining the temperature of the reaction syst...
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