Preparation method of polybutadiene latex with low gel content, and prepared polybutadiene latex

A polybutadiene latex, low-gel technology, applied in the polymer field, can solve problems such as inability to use, and achieve the effects of increasing the volume, increasing the distance between chains, and reducing the reaction site

Active Publication Date: 2020-04-10
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this initiator system cannot be used in aqueous emulsion polymerization

Method used

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  • Preparation method of polybutadiene latex with low gel content, and prepared polybutadiene latex
  • Preparation method of polybutadiene latex with low gel content, and prepared polybutadiene latex
  • Preparation method of polybutadiene latex with low gel content, and prepared polybutadiene latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of Allyl Polyether Monomer

[0030] The preparation of the allyl polyether monomer in this example includes the following steps: 58g of allyl alcohol is added to the reaction kettle, the temperature is raised to 100°C, and 348g of propylene oxide, 132g of ethylene oxide and 1.61g of KOH are added under stirring. Polymerization. When the conversion rate of propylene oxide is 99.1%, add phosphoric acid in an equimolar amount to KOH, stir evenly, and remove the generated water under the conditions of 110°C and 5Kpa. When the water content in the reactant is 0.04%, allyl is obtained base polyether monomer.

Embodiment 2-5

[0031] Example 2-5 Preparation of Allyl Polyether Monomer

[0032] The differences between Examples 2-5 and Example 1 are shown in Table 1, and the rest of the raw materials, experimental conditions and reaction steps are the same as in Example 1.

[0033] The difference between table 1 embodiment 2-5 and embodiment 1

[0034] Example 1 Example 2 Example 3 Example 4 Example 5 Reaction temperature / ℃ 100 110 120 120 130 Allyl alcohol (g) 58 58 58 58 58 Propylene oxide (g) 348 1044 522 1044 696 Ethylene oxide (g) 132 132 176 264 132 KOH(g) 1.61 8.64 7.56 12.29 4.43 Phosphoric acid (g) 2.82 15.12 13.23 21.51 7.75

Embodiment 6

[0035] Example 6 Preparation of butadiene latex

[0036] The preparation of the butadiene latex in this example comprises the following steps: adding 10 g of potassium oleate, 1000 g of butadiene, 1 g of KOH, 1 g of sodium persulfate and 1400 g of deionized water into the reactor, raising the temperature to 80° C., and carrying out the polymerization reaction. When the conversion rate of butadiene was 20%, 10 g of the allyl polyether prepared in Example 1 was added for polymerization and reaction, and polybutadiene latex was obtained when the conversion rate of butadiene was 91%.

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Abstract

The invention provides a preparation method of polybutadiene latex with a low gel content, and the prepared polybutadiene latex. The method comprises the following steps: respectively adding 1-5 partsby weight of an emulsifier, 100 parts by weight of butadiene, 0.1-1 part by weight of a neutralizer, 0.1-0.5 part by weight of an initiator and 100-150 parts by weight of water into a reaction container, raising the temperature to 60-90 DEG C, and carrying out a polymerization reaction; and adding allyl polyether when the butadiene conversion rate is greater than or equal to 20% and less than orequal to 70%, carrying out a copolymerization reaction, and obtaining the polybutadiene latex when the butadiene conversion rate is greater than or equal to 90%. An allyl polyether monomer containingn EO chain segments and m PO chain segments is added when the conversion rate of butadiene is 20-70%, and is copolymerized with butadiene, so that the prepared polybutadiene latex has low gel content,and the impact resistance of ABS resin can be effectively improved.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a method for preparing polybutadiene latex with low gel content and the prepared polybutadiene latex. Background technique [0002] ABS resin is obtained by terpolymerization of butadiene, styrene and acrylonitrile, and is an extremely widely used engineering plastic. At present, the preparation methods of ABS resin include continuous bulk method and emulsion grafting-bulk SAN blending method. The emulsion grafting-bulk SAN blending method has become the mainstream method of ABS production due to its advantages such as advanced technology, wide product range, good performance and low pollution. In the ABS resin prepared by emulsion grafting-bulk SAN blending method, the rubber phase polybutadiene is prepared by emulsion polymerization. Factors affecting the impact strength of ABS resin include rubber phase content, grafting rate, gel content and other factors in ABS re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/06C08F216/14C08F297/00C08L55/02C08L25/12
CPCC08F236/06C08F297/00C08L55/02C08L25/12
Inventor 张琴花韩强刘斌麻宁赵以兵刘波孙一峰
Owner WANHUA CHEM GRP CO LTD
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