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A kind of defoamer for carboxyl nitrile latex and preparation method thereof

A technology of carboxyl nitrile butadiene latex and defoamer, which is applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve the problem of poor foam suppression effect and stability, latex gel agglomeration, poor defoaming effect, etc. problem, to achieve the effect of excellent foam suppression performance, less dosage and fast defoaming

Active Publication Date: 2022-08-09
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing defoamers for carboxylated nitrile latex have poor defoaming effect, poor foam suppression effect and stability, and may easily cause problems such as latex gel agglomeration during use

Method used

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  • A kind of defoamer for carboxyl nitrile latex and preparation method thereof
  • A kind of defoamer for carboxyl nitrile latex and preparation method thereof
  • A kind of defoamer for carboxyl nitrile latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Described carboxyl nitrile latex defoamer is made of the following raw materials by weight:

[0019]

[0020] Its preparation process is as follows:

[0021] Add polysiloxane and white carbon black to the reaction kettle in turn, heat up to 110°C, react for 6 hours, cool down to 60°C, add emulsifier and deionized water, react for 50 minutes, and then drop to room temperature to obtain the product.

Embodiment 2

[0023] Described carboxyl nitrile latex defoamer is made of the following raw materials by weight:

[0024]

[0025] The preparation process is as follows: add polysiloxane and white carbon black in sequence to the reaction kettle, heat up to 140°C, react for 5 hours, cool down to 80°C, add emulsifier and deionized water, react for 40 minutes, and then drop to room temperature product.

Embodiment 3

[0027] Described carboxyl nitrile latex defoamer is made of the following raw materials by weight:

[0028]

[0029]

[0030] The preparation process is as follows: adding polysiloxane and white carbon black in sequence to the reaction kettle, heating up to 130°C, reacting for 5 hours, cooling to 80°C, adding emulsifier and deionized water, reacting for 50 minutes, and then dropping to room temperature product.

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Abstract

The invention belongs to the technical field of industrial defoaming agents, and in particular relates to a defoaming agent for carboxylated nitrile butadiene latex and a preparation method thereof. The antifoaming agent for carboxylated nitrile latex is prepared from the following raw materials in parts by weight: 10-20 parts of polysiloxane; 2-10 parts of white carbon black; 1-5 parts of emulsifier; 100 parts of deionized water The preparation method is as follows: adding polysiloxane and white carbon black to the reaction kettle in turn, heating up to 110-140 ℃, reacting for 3-6 hours, cooling to 60-90 ℃, adding emulsifier and deionized water, The reaction was carried out for 20-50 minutes, and then lowered to room temperature to obtain the product. The defoaming agent of the present invention is a polysiloxane emulsion type defoaming agent, which is mainly used for eliminating foam in the production process of carboxylated nitrile butadiene latex, and is especially suitable for foaming in the process of removing monomer after polymerization. It has the advantages of fast defoaming and excellent anti-foaming, and does not cause the advantages of latex gel; its preparation method is scientific, reasonable and simple.

Description

technical field [0001] The invention belongs to the technical field of industrial defoaming agents, and in particular relates to a defoaming agent for carboxylated nitrile butadiene latex and a preparation method thereof. Background technique [0002] Carboxyl latex occupies an extremely important position in the modern latex industry, and carboxyl nitrile latex is developed as a modified variety of nitrile latex. Compared with ordinary nitrile latex, carboxylated nitrile latex has outstanding mechanical stability, fluidity, high tensile strength and unique adhesion. Therefore, carboxylated nitrile latex has developed rapidly in recent years, especially in the industries of thick, thin, undershirts, gloves without undershirts, condoms, and sealing materials. Carboxylated nitrile latex will produce a lot of foam under the action of adding emulsifier, initiator and stirring during the polymerization process. At the same time, it will also produce a lot of foam when the polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 张荣召
Owner SHANDONG UNIV OF TECH
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