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Fluorine-containing polyether modified siloxane, preparation method thereof, composite surfactant, preparation method of the composite surfactant and polyurethane foam

A surfactant and fluorine-containing polyether technology, which is applied in the field of polyurethane foam, can solve the problems of poor storage stability of polyol mixtures, large nucleating agent addition, and poor stability of polyols, and achieve improved storage stability and low surface area. Tension, surface activity improvement effect

Active Publication Date: 2020-04-10
JIANGSU MAYSTA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Fluorosurfactants in the prior art still have many properties to be improved, for example, the surface tension of the fluorosurfactants in the prior art is high, and the stability to polyols in polyols is poor, etc.
For example, CN103044687A and CN109867791A introduce fluorine-containing groups through the reaction of allyl fluorine-containing compounds and polysiloxane side hydrogens, which provide good application performance when used to prepare rigid polyurethane foams, but due to the introduction of fluorine-containing groups in To a certain extent, it affects the emulsifying properties of polyether siloxane, resulting in poor storage stability of polyol mixtures when used to prepare rigid polyurethane foams
In CN108779278A, CN1033092C, CN1174562A, and EP0498628A, fluorine-containing compounds are used as nucleating agents and organosilicon surfactants, but the addition of nucleating agents is large and the production cost is high

Method used

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  • Fluorine-containing polyether modified siloxane, preparation method thereof, composite surfactant, preparation method of the composite surfactant and polyurethane foam
  • Fluorine-containing polyether modified siloxane, preparation method thereof, composite surfactant, preparation method of the composite surfactant and polyurethane foam
  • Fluorine-containing polyether modified siloxane, preparation method thereof, composite surfactant, preparation method of the composite surfactant and polyurethane foam

Examples

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Effect test

preparation example Construction

[0077] The preparation method of the composite surfactant is as follows: the above-mentioned surfactant containing no silicon atoms and fluorine-containing polyether modified siloxane are mixed to form the composite surfactant.

[0078] The implementation of the present invention also provides a polyurethane foam, which includes the above composite surfactant. The surface quality of this polyurethane foam was good.

Embodiment 1

[0080] This embodiment provides a preparation method of fluorine-containing polyether modified siloxane, comprising:

[0081] (1) Synthesis of hydrogen-containing polymethylsiloxane;

[0082] Add octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, hexamethyldisiloxane and 1% acid clay of the total mass of the above compounds into a three-necked flask, heat up to 70°C, and wait until the temperature After stabilization, heat preservation reaction for 7 hours to prepare hydrogen-containing polysiloxane, wherein the molar ratio between octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane and hexamethyldisiloxane is 11:1.5 : 1, its structure is as follows:

[0083]

[0084] (2) Synthetic silicone polyether copolymer;

[0085] Add 50.0 g of the above-prepared hydrogen-containing polysiloxane, 96.47 g (30% excess) of terminal allyl polyether, and 10 ppm of chloroplatinic acid catalyst into a three-necked flask, and heat up to 115° C. under normal pressure to rea...

Embodiment 2

[0095] This example provides a composite surfactant, which includes the fluorine-containing polyether-modified siloxane prepared in Example 1 and isotridecanol, and the mass ratio of the two is 6:1.

[0096] This embodiment also provides a method for preparing the above-mentioned composite surfactant. Add the fluorine-containing polyether-modified siloxane and isotridecanol prepared in Example 1 into a three-necked flask, and stir at room temperature for 30 minutes.

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Abstract

The present invention relates to the technical field of silicone surfactants, and particularly relates to fluorine-containing polyether modified siloxane, a preparation method thereof, a composite surfactant, a preparation method of the composite surfactant and polyurethane foam. The fluorine-containing polyether modified siloxane has a structure shown in the specification, has lower surface tension, shows good application performance in preparation of polyurethane foam, can effectively improve surface quality of foam, and improves quality of polyurethane foam.

Description

technical field [0001] The invention relates to the technical field of silicone surfactants, in particular to fluorine-containing polyether modified siloxane, a preparation method thereof, a composite surfactant, a preparation method thereof and polyurethane foam. Background technique [0002] Compared with ordinary surfactants, silicone surfactants have better surface activity and easy spreadability, and can significantly reduce the surface tension of water. They are a type of high-efficiency surfactants. Due to its unique properties, silicone surfactants are widely used in textiles, cosmetics and personal care products, plastics and coatings, agricultural chemicals, medicine and mechanical processing and other fields. Fluorosurfactant is the one with the highest surface activity among surfactants so far, and its unique properties can be summarized as "three highs" and "two phobias", that is, high surface activity, high heat resistance stability and high chemical stability ...

Claims

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Application Information

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IPC IPC(8): C08G77/46C08G101/00
CPCC08G77/46C08G2110/0025
Inventor 王伟伟唐雄峰黄登登
Owner JIANGSU MAYSTA CHEM
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