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Preparation method of carboxylic styrene butadiene latex

A carboxylated styrene-butadiene latex and a formulation technology are applied in the manufacture of asbestos or non-asbestos scooping board, the preparation of carboxylated styrene-butadiene latex, and the field of preparation of styrene-butadiene latex, which can solve the problems of high price, unfavorable promotion and application, etc. Low cost, lower cost, improved polymerization stability effect

Active Publication Date: 2010-02-17
SINOPEC LANZHOU GASOLINEEUM CHEM IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method of domestic production of styrene-butadiene latex for asbestos-extracting boards is to use butadiene and styrene as monomers and synthesize them under the action of various additives. There are many types of additives and the price is expensive, which is not conducive to popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one: the production of carboxylated styrene-butadiene latex

[0040] 1. Raw material formula: in parts by mass

[0041] Monomer: 62 parts of butadiene, 28 parts of styrene, 6 parts of methacrylic acid, 3 parts of itaconic acid.

[0042] Emulsifier: 0.8 parts of potassium oleate, 0.8 parts of sodium dodecylbenzenesulfonate, 0.6 parts of polyoxyethylene nonylphenol ether, and 0.3 parts of sodium β-naphthalenesulfonate formaldehyde condensate.

[0043] Initiator: 1.2 parts of potassium persulfate.

[0044] Molecular weight regulator: 0.4 parts of n-dodecyl mercaptan.

[0045] pH buffering agent: sodium bicarbonate, the formulation amount is 0.3 parts.

[0046] Electrolyte: Potassium phosphate, formulated at 0.2 parts.

[0047] Chelating agent: tetrasodium ethylenediaminetetraacetic acid, the formulation amount is 0.4 parts.

[0048] Soft water: 120 parts.

[0049] 2. Process:

[0050] (1) Feeding process: in a 10L polymerization kettle with stirring, nitr...

Embodiment 2

[0057] Embodiment two, the production of carboxylated styrene-butadiene latex

[0058] 1. Raw material formula: in parts by mass

[0059] Monomer: 60 parts of butadiene, 28 parts of styrene, 6 parts of methacrylic acid, 6 parts of itaconic acid.

[0060] Emulsifier: 0.8 parts of potassium oleate, 0.8 parts of sodium dodecylbenzenesulfonate, 0.6 parts of polyoxyethylene nonylphenol ether, and 0.3 parts of sodium β-naphthalenesulfonate formaldehyde condensate.

[0061] Initiator: 1.2 parts of potassium persulfate.

[0062] Molecular weight regulator: 0.3 parts of tertiary dodecyl mercaptan.

[0063] pH buffering agent: sodium bicarbonate, the formulation amount is 0.4 parts.

[0064] Electrolyte: Potassium phosphate, formulated at 0.3 parts.

[0065] Chelating agent: disodium ethylenediaminetetraacetic acid, the formulation amount is 0.3 parts.

[0066] Soft water: 110 parts.

[0067] 2. Process:

[0068] (1) Feeding process: in a 10L polymerization kettle with stirring, ...

Embodiment 3

[0075] Embodiment three, the production of carboxylated styrene-butadiene latex

[0076] 1. Raw material formula: in parts by mass

[0077] Monomer: 64 parts of butadiene, 30 parts of styrene, 3 parts of methacrylic acid, 3 parts of itaconic acid.

[0078] Emulsifier: 0.8 parts of potassium oleate, 0.8 parts of sodium dodecylbenzenesulfonate, 0.6 parts of polyoxyethylene nonylphenol ether, and 0.3 parts of sodium β-naphthalenesulfonate formaldehyde condensate.

[0079] Initiator: 1.2 parts of potassium persulfate.

[0080] Molecular weight regulator: 0.38 parts of tertiary dodecyl mercaptan.

[0081] pH buffering agent: sodium bicarbonate, the formulation amount is 0.37 parts.

[0082] Electrolyte: Potassium phosphate, formulated at 0.40 parts.

[0083] Chelating agent: tetrasodium ethylenediaminetetraacetic acid, the formula quantity is 0.42 parts.

[0084] Soft water: 115 parts.

[0085] 2. Process:

[0086] (1) Feeding process: in a 10L polymerization kettle with sti...

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Abstract

The invention provides a preparation method of carboxylic styrene-butadiene latex. In the method, butadiene and styrene are adopted as main monomers, and unsaturated carboxylic acid or unsaturated carboxylic ester functional monomers are additionally adopted; a compound emulsifying system formed by a reacting type emulsifier, an anion emulsifier and a non-ionic emulsifier is adopted, and a persulfate thermal decomposition initiating agent is also adopted. Low-temperature polymerization is replaced by high-temperature polymerization, and a two-stage stepped temperature control process is adopted so as to ensure that the stability of the polymerization of the latex is greatly improved, prevent the generation of gel, improve the mechanical stability of the latex and reduce the energy consumption. The carboxylic styrene-butadiene latex prepared by the method has excellent oil resistance, solvent resistance, high and low temperature resistance (resistance of high temperature of -45 DEG C and high temperature of 220 DEG C) and good strength and is quite suitable for manufacturing asbestos or the non-asbestes sheet for a sealing gasket of a vehicle.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and relates to a preparation method of styrene-butadiene latex, in particular to a preparation method of carboxylated styrene-butadiene latex, which is mainly used for the manufacture of asbestos or non-asbestos sheet. Background technique [0002] Asbestos or non-asbestos latex sheet is made of asbestos-free inorganic or organic synthetic fibers and latex compounding agent as the main raw material. It is a sealing material made of beating, sheeting, and vulcanization. It is mainly used for internal combustion engine cylinder sealing gaskets. Static gaskets for substrates and other mechanical devices. The latex used in the manufacture of asbestos or non-asbestos sheets mainly includes nitrile latex, styrene-butadiene latex, and acrylate latex. Among them, nitrile latex is favored for its excellent elasticity, blending performance and bonding performance, and is the most widely used. ...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F2/30C08F2/26C08L9/08C08K13/04C08K7/12C08K7/14
Inventor 俞燕龙李石磊杨帆陈世龙许翠红张英杰
Owner SINOPEC LANZHOU GASOLINEEUM CHEM IND CORP
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