Method for preparing polybutadiene rubber latex with extra large particle size

A technology of polybutadiene latex and particle size, which is applied in the field of preparation of polybutadiene latex with a super-large particle size of 400-1000nm, can solve the problems that do not involve the preparation method of polymer agglomerating agent and agglomeration process, and achieve agglomeration The polymerization process is controllable, the preparation process is simple, and the effect of improving the impact strength

Active Publication Date: 2011-05-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention can only be used for agglomeration to increase the particle size of nitrile latex, and the particle size of latex to be agglomerated is only 80-180nm, and cannot be used for the particle size of polybutadiene latex and larger particle size to be agglomerated latex increase
[0010] CN1730506 only discloses that the base latex prepared by the polymer agglomeration method carries out emulsion grafting, prepares ABS resin to improve its impact resistance, does not relate to the preparation method and agglomeration process of the polymer agglomerating agent, and the preparation of the latex to be agglomerated particle size

Method used

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  • Method for preparing polybutadiene rubber latex with extra large particle size
  • Method for preparing polybutadiene rubber latex with extra large particle size
  • Method for preparing polybutadiene rubber latex with extra large particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Synthesis of polymer agglomerating agent

[0035] deionized water, sodium bicarbonate (NaHCO 3 ), Sodium Dodecyl Sulfate (SDS), Potassium Persulfate (KPS), Dodecyl Mercaptan (TDDM), Butyl Acrylate (BA) and Styrene (ST) are added with agitator and reflux condenser , Thermometer in a four-neck bottle, put it into a water bath, start stirring and emulsifying, replace it with nitrogen gas, raise the temperature, when the temperature reaches 55°C, start timing, and add the mixed monomers dropwise after 1 hour of polymerization, including BA, methacrylic acid (MMA), ST, OP-10, react for 2 hours, raise the temperature to 75°C, stir for another 1 hour to complete the reaction, cool down and filter.

[0036] (2) Add the polymer agglomerating agent into the polybutadiene latex in a certain proportion (ratio of dry parts), stir slowly for 10 minutes while adding, and place for more than 4 hours.

[0037] (3) Components and parts by weight

[0038] 1) The components and part...

Embodiment 2

[0048] (1) Synthesis of polymer agglomerating agent

[0049] deionized water, sodium bicarbonate (NaHCO 3 ), Sodium Dodecyl Sulfate (SDS), Potassium Persulfate (KPS), Dodecyl Mercaptan (TDDM), Butyl Acrylate (BA) and Styrene (ST) are added with agitator and reflux condenser , Thermometer in a four-neck bottle, put it into a water bath, start stirring and emulsifying, replace it with nitrogen gas, raise the temperature, when the temperature reaches 60°C, start timing, and add the mixed monomers dropwise after polymerization for 0.5 hours, including BA, methacrylic acid (MMA), ST, OP-10, react for 2.5 hours, raise the temperature to 80°C, stir for another 1 hour to complete the reaction, cool down and filter.

[0050] (2) Add the polymer agglomerating agent into the polybutadiene latex in a certain proportion (ratio of dry parts), stir slowly for 10 minutes while adding, and place for more than 4 hours.

[0051] (3) Components and parts by weight

[0052] 1) The components an...

Embodiment 3

[0062] (1) Synthesis of polymer agglomerating agent

[0063] deionized water, sodium bicarbonate (NaHCO 3 ), Sodium Dodecyl Sulfate (SDS), Potassium Persulfate (KPS), Dodecyl Mercaptan (TDDM), Butyl Acrylate (BA) and Styrene (ST) are added with agitator and reflux condenser , Thermometer in a four-neck bottle, put it into a water bath, start stirring and emulsifying, replace it with nitrogen, raise the temperature, when the temperature reaches 58°C, start timing, and add the mixed monomers dropwise after 1 hour of polymerization, including BA, methacrylic acid (MMA), ST, OP-10, react for 2.5 hours, raise the temperature to 78°C, stir for another 1.5 hours to complete the reaction, cool down and filter.

[0064] (2) Add the polymer agglomerating agent into the polybutadiene latex in a certain proportion (ratio of dry parts), stir slowly for 10 minutes while adding, and place for more than 4 hours.

[0065] (3) Components and parts by weight:

[0066] 1) The components and pa...

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Abstract

The invention relates to a method for preparing polybutadiene rubber latex with extra large particle size, comprising the following steps: adding deionized water, sodium bicarbonate, sodium lauryl sulphate, potassium peroxydisulfate, dodecyl hydrosulfide, butyl acrylate and styrene into a reactor, carrying out replacement with nitrogen after stirring and emulsifying are started, heating, controlling the temperature to be 50-70 DEG C, polymerizing for 0.5-1 hour, then dropwise adding mixed monomers of styrene, methacrylic acid, butyl acrylate and OP-10, reacting for 1-4 hours, heating until the temperature is 70-85 DEG C, then stirring for 0.5-2 hours until the reaction is finished, and cooling and filtering to obtain a high polymer agglomerant; adding the high polymer agglomerant into polybutadiene rubber latex while slowly stirring for 1-60 minutes, and standing for 4 hours, thus the polybutadiene rubber latex with extra large particle size of 400-1000nm is obtained. The preparation process is simple, the agglomeration condition is mild, the agglomeration process is controllable, and the impact strength of an ABS (acrylonitrile butadiene styrene) finished product is greatly improved.

Description

Technical field: [0001] The invention relates to a preparation method of 400-1000nm ultra-large particle diameter polybutadiene latex. Background technique: [0002] Bimodal distribution ABS resin is a new ABS resin technology developed on the basis of general ABS resin. The combination of size and particle size can effectively toughen the resin and obtain an ABS resin with excellent comprehensive properties. The current bimodal ABS grafting technology is mainly based on large particle size polybutadiene latex with a particle size of about 300nm, mixed with a small amount of small particle size polybutadiene latex with a particle size of about 100nm or super large particle size above 400nm. Particle size polybutadiene latex is used as the basic latex. At present, the particle size of the large particle size polybutadiene latex produced by the domestic ABS device using a one-step method is 250-350nm, and its particle size has a unimodal distribution, and the polymerization t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C1/07C08F265/06C08F265/04C08F257/02
Inventor 陆书来张柳孙继德陈万友庞建勋殷兰王秀芝石捷强郑美珠王龙辉单崇杰付愉程佳尹秀清
Owner PETROCHINA CO LTD
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