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Method for preparing carboxylic styrene butadiene latex for carpet back coating

A carboxylated styrene-butadiene latex, back-coating technology, applied in adhesive types, textiles and papermaking, fiber treatment, etc.

Inactive Publication Date: 2009-09-09
溧阳巨神科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, tert-dodecyl mercaptan as a molecular weight regulator has a heavy odor, which affects the production environment and the surrounding living environment of the enterprise, while the alkylphenol polyoxyethylene ether used as a nonionic emulsifier is environmentally friendly due to degradation, etc. problem, has been banned for use in emulsion synthesis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Main monomer butadiene 47 parts, styrene 48 parts; functional monomer 3.5 parts, of which acrylic acid 2 parts, itaconic acid 1.5 parts; auxiliary monomer 1.5 parts, using methacrylonitrile; emulsifier 2.4 parts, of which anion The emulsifier is 1.2 parts of sodium alkyl sulfate, 0.6 parts of sodium alkylbenzene sulfonate, 0.6 parts of non-ionic emulsifier fatty alcohol polyoxyethylene ether; 1.5 parts of initiator, using thermal decomposition type potassium persulfate; molecular weight regulator positive ten 1 part of dithiol.

[0020] Under vacuum conditions, put 75 parts of deionized water, all electrolytes, chelating agent, PH buffer, emulsifier solution (including 0.4 parts of sodium alkyl sulfate, 0.2 parts of sodium alkylbenzene sulfonate, fatty alcohol 0.2 parts of polyoxyethylene ether, 8 parts of deionized water), 0.4 parts of molecular weight regulator n-dodecanethiol, 12 parts of styrene, 2 parts of functional monomers (including 1 part of acrylic acid and 1 par...

Embodiment 2

[0023] Main monomer butadiene 30 parts, styrene 64 parts; functional monomer 6 parts, of which acrylic acid 3 parts, methacrylic acid 1 part, itaconic acid 2 parts; emulsifier 0.6 parts, of which the anionic emulsifier is alkyl sulfuric acid 0.4 parts of sodium, 0.2 parts of nonionic emulsifier fatty alcohol polyoxyethylene ether; 0.35 parts of initiator, using ammonium persulfate; molecular weight regulator 0.25 parts of n-dodecanethiol.

[0024] Under vacuum conditions, put 65 parts of deionized water, all electrolytes, chelating agent, PH buffer, emulsifier solution (including 0.2 part of sodium alkyl sulfate, 0.1 part of fatty alcohol polyoxyethylene ether, deionized Water 5 parts), molecular weight regulator n-dodecanethiol 0.15 parts, styrene 20 parts, functional monomer 4 parts (including 1 part acrylic acid, 1 part methacrylic acid, 2 parts itaconic acid), stir well, and then use N 2 Replace twice, then use N 2 Press in 10 parts of butadiene, heat up to 65~75℃, add initiat...

Embodiment 3

[0027]35 parts of main monomer butadiene, 42 parts of styrene; 8 parts of functional monomers, including 4 parts of acrylic acid, 1.5 parts of methacrylic acid, 2.5 parts of itaconic acid; 15 parts of auxiliary monomers, of which 8 parts of methyl methacrylate Parts, 6 parts of methyl acrylate, 1 part of β-hydroxyethyl acrylate; 1.8 parts of emulsifier, of which the anionic emulsifier is 0.8 part of sodium alkyl sulfate, 0.4 part of sodium alkylbenzene sulfonate, and the nonionic emulsifier is fatty alcohol poly 0.6 part of oxyethylene ether; 1 part of initiator, using ammonium persulfate; 0.6 part of molecular weight regulator n-dodecanethiol.

[0028] Under vacuum conditions, put 80 parts of deionized water, all electrolytes, chelating agent, PH buffer, emulsifier solution (including 0.4 parts of sodium alkyl sulfate, 0.4 parts of sodium alkylbenzene sulfonate, fatty alcohol Polyoxyethylene ether 0.3 parts, deionized water 10 parts), molecular weight regulator n-dodecanethiol 0....

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Abstract

The invention discloses a preparation method of a backing material for carpet back coating, in particular to a preparation method of carboxylated styrene-butadiene latex. Using butadiene and styrene as the main monomers, adding functional monomers and auxiliary monomers, the emulsifier is used in combination with anionic emulsifier and nonionic emulsifier, and the initiator is thermally decomposed by potassium persulfate aqueous solution or ammonium persulfate aqueous solution Type persulfate, the molecular weight regulator is dodecyl mercaptan, batch feeding or drop feeding is adopted intermittently, and an environmentally friendly carboxylated butylbenzene for carpet back coating is synthesized by decompression flash degassing latex. The carboxylated styrene-butadiene latex prepared by the above method has good elasticity and stiffness, high bonding strength, and low volatile harmful substances after being used on woven carpets and tufted carpets, which meets environmental protection requirements and is a green product.

Description

Technical field [0001] The invention relates to a preparation method of a backing material for carpet back coating, in particular to a preparation method of carboxyl styrene butadiene latex. Background technique [0002] The backing of woven carpets and tufted carpets needs to be coated with adhesive to fix the pile, stabilize the size, and make the carpet have good leveling, durability and moisture resistance. In the carpet manufacturing process, the adhesives used include styrene butadiene latex, carboxyl styrene butadiene latex, all-acrylic emulsion, ethylene propylene emulsion, nitrile latex, polyvinyl acetate emulsion and natural latex, of which carboxyl styrene butadiene latex is the most used. And all-acrylic latex. Due to the high price of all-acrylic emulsion, the carboxyl styrene butadiene latex with its excellent bonding strength, elasticity and hydrophobicity endows the carpet with durability, dimensional stability, stiffness and elasticity, thick and comfortable, wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F2/22C08F2/38C09J125/08D06M15/233C08F236/06C08F220/10
Inventor 蒋志平杨浩平叶剑豪林国胜缪利锋
Owner 溧阳巨神科技材料有限公司
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