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Preparation method of polyacrylate microgel emulsion and application thereof

A technology of polyacrylate and microgel, which is applied in the field of polymers, can solve the problems of low peel strength, slow drying speed, and poor medium resistance of composite products, and achieve the effects of improving heat resistance, drying speed, and performance

Inactive Publication Date: 2010-10-20
HITEK POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention adopts the method of soap-free emulsion polymerization to synthesize polyacrylate microgel emulsion, utilizes its active group to improve the adhesive force to various base materials; Strength and other mechanical properties, improve the heat resistance, water resistance and solvent resistance of the film; use its high-solid and low-viscosity characteristics to increase the drying speed, thereby solving the inherent slow drying speed of water-based acrylic emulsion adhesives, and the peel strength of composite products Low, heat resistance, poor medium resistance and other defects, technical difficulties in achieving the performance of solvent-based polyurethane adhesives

Method used

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  • Preparation method of polyacrylate microgel emulsion and application thereof

Examples

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Comparison scheme
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Embodiment 1

[0053] The present embodiment provides a kind of preparation method of polyacrylate microgel emulsion, it comprises the following steps:

[0054] 1. Pre-emulsification: Weigh 200-250 parts of deionized water, mix 1 / 3-2 / 3 of the total amount of deionized water, 100 parts of mixed monomer (long-chain flexible monomer: 75 parts of butyl acrylate, functional Monomer: 7.2 parts of hydroxyethyl acrylate, 1.2 parts of acrylic acid, 0.3 parts of epoxy monomer, multi-functional monomer: 0.1 part of divinylbenzene), 0.1 part of reactive emulsifier into the emulsification kettle, and stir at high speed , pre-emulsified for 10 to 30 minutes to obtain an emulsion.

[0055] 2. Seed polymerization: Add 20% to 40% of the remaining deionized water and 0.1 part of nonionic emulsifier in the reactor, stir and heat until the temperature reaches 60°C, add initiator a (component: K 2 S 2 o 8 0.12 parts, H 2 (26 parts) When the temperature reaches 75°C, quickly add 20% to 40% of the pre-emulsio...

Embodiment 2

[0062] This embodiment provides a preparation method of polyacrylate microgel emulsion, and its manufacturing steps are basically the same as in Example 1, the difference being that the raw materials of the polyacrylate microgel emulsion prepared in this embodiment consist of:

[0063] Butyl acrylate 75 parts

[0064] 10 parts of hydroxyethyl acrylate

[0065] Acrylic acid 1.5 parts

[0066] Epoxy functional monomer 0.6 parts

[0067] 2 parts divinylbenzene

[0068] Reactive emulsifier 0.15 parts

[0069] Non-ionic emulsifier 0.1 parts

[0070] 220 parts of deionized water

[0071] PH regulator 0.02 parts

[0072] The raw material component of described free radical initiator comprising initiator a, initiator b is:

[0073] K 2 S 2 o 8 0.15 copies,

[0074] h 2 O 7.5 servings

[0075] Initiator b

[0076] 0.15 parts of tert-butyl hydroperoxide

[0077] h 2 O 5 copies

[0078] The effect of this embodiment is the same as that of Em...

Embodiment 3

[0080] This embodiment provides a preparation method of polyacrylate microgel emulsion, and its manufacturing steps are basically the same as in Example 1, the difference being that the raw materials of the polyacrylate microgel emulsion prepared in this embodiment consist of:

[0081] Butyl acrylate 75 parts

[0082] 15 parts of hydroxyethyl acrylate

[0083] Acrylic acid 2.4 parts

[0084] Epoxy functional monomer 0.6 parts

[0085] 0.7 parts of divinylbenzene

[0086] Reactive emulsifier 0.15 parts

[0087] Non-ionic emulsifier 0.1 parts

[0088] 250 parts of deionized water

[0089] PH regulator 0.02 parts

[0090] The raw material component of described free radical initiator comprising initiator a, initiator b is:

[0091] K 2 S 2 o 8 0.15 copies,

[0092] h 2 O 7.5 servings

[0093] Initiator b

[0094] 0.15 parts of tert-butyl hydroperoxide

[0095] h 2 O 5 copies

[0096] The effect of this embodiment is the same as that of E...

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Abstract

The invention provides a method for synthetizing polyacrylate microgel emulsion in a soap-free emulsion polymerization mode, which comprises the following processes: (1) pre-emulsification: mixing a variety of monomers for emulsification to prepare pre-emulsified liquid; (2) seed polymerization: carrying out a polymerization reaction on a small amount of pre-emulsified liquid after the activation of an initiator to prepare seed solution; (3) polymerization: continuing to drip the pre-emulsified liquid in the seed solution to prepare microgel; and (4) ammonification: dripping hartshorn to regulate PH to prepare the polyacrylate microgel emulsion. The process is simple, the condition is easy to control, the emulsion is easy for scale production and can be used as the main constituent of aqueous adhesive used for flexible package plastic-plastic composition, and the prepared polyacrylate microgel aqueous adhesive has strong binding power on base materials, is waterproof, resists heat, is environmental-friendly, and has high drying speed.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to a preparation method of polyacrylate microgel emulsion and its application to adhesives for compounding flexible packaging. Background technique [0002] With the enhancement of people's awareness of environmental protection and the emphasis on food packaging safety, higher and higher standards and requirements are put forward for adhesives for flexible packaging lamination. Among the adhesives used in food composite flexible packaging bags in my country, solvent-based polyurethane adhesives account for more than 90%, and solvent-free and water-based composite adhesives account for less than 10%. Solvent-based adhesives have the hazard of solvent residues. Solvent-free composite adhesives cannot meet the requirements of high-temperature cooking for poached cranes and require special equipment. Water-based adhesives can be directly applied to dry-type composite equipment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F2/24C08F8/30C09J133/08
Inventor 吴达文
Owner HITEK POLYMER MATERIAL
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