Modified styrene acrylic emulsion water-based adhesive and preparation method thereof

A technology of propylene styrene emulsion and water-based glue, which is applied in the direction of adhesive types, amide/imide polymer adhesives, ester copolymer adhesives, etc., and can solve poor stability, glue precipitation and layering, Water-based glue low-temperature antifreeze and high-temperature stability cannot meet the needs of transportation and storage, so as to improve the effect of high-low temperature storage and high-low temperature cycle effect

Inactive Publication Date: 2018-03-09
SHENZHEN TAIQIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the low-temperature antifreeze and high-temperature stability of the above-mentioned water-based glue cannot meet the needs of transportation and sto...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A preparation method of modified propylene emulsion water-based glue, comprising the steps of:

[0029] Step 1: Pre-emulsification; mix hard monomers, soft monomers, functional monomers, and emulsifiers in deionized water, and heat up to 45-55°C to form a stable pre-emulsion;

[0030] Step 2: Prepolymerization reaction, adding 25wt% of the pre-emulsion into the reactor, and passing nitrogen gas, raising the temperature to 70-75°C, adding the initiator dropwise; reacting for 20 minutes;

[0031] Step 3: Polymerization reaction, under the condition of keeping the temperature constant, add the remaining pre-emulsion and an appropriate amount of initiator and chain transfer agent into the reactor in a dropwise manner; the dropping time is 40 minutes; after the dropping React at constant temperature for 1 hour; finally raise the temperature to 80-85°C and add an appropriate amount of initiator at one time to remove excess monomer.

[0032] The preparation process of Example...

Embodiment 2

[0037] The soft monomer of embodiment 2 is ethyl acrylate, the chain transfer agent is dodecyl mercaptan, and the emulsifier is 1:2 sodium lauryl sulfate and NP-10 intermixing emulsifier; the initiator is persulfuric acid Ammonium.

Embodiment 3

[0038] The soft monomer of embodiment 3 is ethyl acrylate, the chain transfer agent is tetradecyl mercaptan, and the emulsifier is 1:2 sodium lauryl sulfate and NP-10 intermixing emulsifier; the initiator is persulfuric acid sodium.

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PUM

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Abstract

The invention relates to the field of adhesives and particularly relates to a preparation method of a modified styrene acrylic emulsion water-based adhesive. The preparation method comprises the following steps: (1) pre-emulsification: mixing hard monomers, soft monomers, functional monomers and an emulsifying agent in deionized water, and heating to 45-55 DEG C, so as to form a stable pre-emulsion; (2) pre-polymerization reaction: adding 20wt%-30wt% of the pre-emulsion into a reactor, introducing nitrogen, heating to 70-75 DEG C, and dropwise adding an initiator for reacting for 10-30 minutes; and (3) polymerization reaction: dropwise adding the residue pre-emulsion, a proper amount of the initiator and a proper amount of a chain transfer agent into the reactor at a constant temperature for 30-60 minutes, after the dropwise adding is finished, carrying out constant-temperature reaction for 1-2 hours, heating to 80-85 DEG C, and adding a proper amount of the initiator once so as to remove residual monomers. The invention aims at providing the stable-performance modified styrene acrylic emulsion water-based adhesive capable of resisting the changes of high and low temperatures and the preparation method of the modified styrene acrylic emulsion water-based adhesive.

Description

technical field [0001] The invention relates to the field of chemical engineering, in particular to a modified propylbenzene emulsion water-based glue and a preparation method thereof. Background technique [0002] Propylbenzene emulsion (styrene-acrylate emulsion) is obtained by emulsion copolymerization of styrene and acrylate monomers. It has good water resistance, alkali resistance, scrub resistance, and outdoor aging resistance, and is widely used in adhesives, coatings and other fields. [0003] Chinese patent application CN201410116461.5 discloses a silicone-modified styrene-acrylic emulsion, which relates to the field of chemical technology. 1) First, deionized water, tert-butanol and isopropanol are put into the reactor and stirred and mixed evenly, heated to 60- 70°C, prepare solution a; 2) Dissolve styrene, isooctyl acrylate, ethyl silicate, organosilicon monomer and anionic ring-opening polymerization emulsion into solution a, stir well until the temperature rea...

Claims

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Application Information

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IPC IPC(8): C09J133/08C08F220/14C08F220/18C08F212/08C08F220/06C08F220/20C08F220/58C08F2/26C08F2/30C08F2/38
CPCC08F2/26C08F2/30C08F2/38C08F220/14C08F220/18C08F220/1804C09J133/24C08F212/08C08F220/1811C08F220/06C08F220/20C08F220/58
Inventor 李满林胡赞军刘志军胡可玺张可帮
Owner SHENZHEN TAIQIANG CHEM
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