Preparation method of acrylic ester type processing aid with multilayer gradient core-shell structure

An acrylate-based, core-shell structure technology, applied in the field of preparation and modification of functional polymer materials, can solve the problems of single space structure, high cost, complicated process, etc., and achieves reasonable process parameters, low price, and excellent weather resistance. Effect

Active Publication Date: 2013-12-25
乌鲁木齐市华泰隆化学助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is a simple acrylate random copolymer with a single space structure, complex process and high cost

Method used

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  • Preparation method of acrylic ester type processing aid with multilayer gradient core-shell structure
  • Preparation method of acrylic ester type processing aid with multilayer gradient core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 100 g deionized water, 1 g potassium persulfate, 6 g Tween, 1 g sodium dodecylbenzenesulfonate emulsifier, 4 g n-butanol, 0.1 g polyvinyl alcohol, 100 g soybean oil and 5 g divinylbenzene. Stir at 30°C for 15 minutes to obtain a soybean oil pre-emulsion; then, raise the temperature of the reaction system to 75°C, keep it warm for 2 hours, then cool to room temperature to obtain the emulsion of the inner core (core layer) of the processing aid.

[0031] 1.5 g of potassium persulfate, 6 g of styrene and 20 g of methyl methacrylate were sequentially added to the above 100 g of processing aid inner core emulsion. After stirring evenly, gradually raise the temperature of the system to 75°C, and continue to add 1.5 g of potassium persulfate, 4 g of styrene and 30 g of methyl methacrylate to the system after the heat preservation reaction for 30 minutes, and add the 1.5 g of potassium persulfate and 50 g of methyl methacrylate were added into the reaction kettle, and the ...

Embodiment 2

[0033]Add 120 g deionized water, 1 g ammonium persulfate, 1.5 g alkylphenol polyoxyethylene ether emulsifier OP, 1 g sodium lauryl sulfate, 0.1 g Carboxycellulose, 100 g butyl acrylate and 8 g diene acrylate. Stir at 30° C. for 15 minutes to obtain a butyl acrylate pre-emulsion. Then, raise the temperature of the reaction system to 70° C., keep it warm for 2 hours, and then cool it down to normal temperature to obtain the emulsion of the inner core (that is, the core layer) of the processing aid.

[0034] 1 g of ammonium persulfate, 4 g of styrene and 10 g of methyl methacrylate were sequentially added to the above 20 g of processing aid inner core emulsion. After stirring evenly, gradually raise the temperature of the system to 70°C, add 1 g of ammonium persulfate, 3 g of styrene and 20 g of methyl methacrylate to the system after the heat preservation reaction for 30 minutes, Add 1 g ammonium persulfate, 2 g styrene and 30 g methyl methacrylate in the still, and add 1 g am...

Embodiment 3

[0036] Add 1000 g deionized water, 10 g ammonium persulfate, 25 g alkylphenol polyoxyethylene ether emulsifier NP, 10 g sodium lauryl sulfate, 5 g hydroxypropyl cellulose, 5 g polyvinyl alcohol, 1000 g isoctyl acrylate and 50 g divinylbenzene. Stir at 30° C. for 15 minutes to obtain isooctyl acrylate pre-emulsion. Then, raise the temperature of the reaction system to 50° C., keep the temperature for 2 hours, and then cool to normal temperature to obtain the inner core emulsion of the processing aid.

[0037] Add 100 g of peroxydicarbonate, 2000 g of acrylonitrile, and 3000 g of vinyl chloride to the above-mentioned 20,000 g of processing aid core emulsion in sequence. After stirring evenly, gradually raise the temperature of the system to 50° C., and keep the temperature and pressure for 30 minutes. The mixed solution of 200 g peroxydicarbonate, 1000 g acrylonitrile and 6000 g vinyl chloride is quickly injected into the reactor with a peristaltic metering pump, and all the mi...

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Abstract

The invention relates to a preparation method of an acrylic ester type processing aid with a multilayer gradient core-shell structure, belonging to the field of modification of functional macromolecular materials. The preparation method comprises the following process steps: (1) under the condition of stirring at 30 DEG C, adding deionized water, an initiator A, an emulsifier, a co-emulsifier, a dispersant, a soft monomer and a crosslinking agent into a reaction kettle, and performing pre-emulsification to obtain a pre-emulsion; (2) heating the pre-emulsion to a temperature less than or equal to 90 DEG C, and performing a thermal reaction to obtain a soft monomer core layer emulsion; and (3) adding an initiator B, alpha olefin and a monomer which has a solubility parameter similar to that of PVC (polyvinyl chloride) into the soft monomer core layer emulsion, and sequentially polymerizing 1-5 layers of rigid polymer shells with a solubility parameter similar to that of polyvinyl chloride to obtain the acrylic ester type processing aid. The obtained PVC processing aid has the advantages of low price, good effect of promoting plasticization, excellent weathering resistance, capability of improving impact properties of a product and the like, and can be widely applied to the fields of PVC building door and window profiles, pipes, wires, cables, small-scale household appliances and the like.

Description

technical field [0001] The invention relates to a preparation method of a PVC processing aid, in particular to a preparation method of an acrylate processing aid with a multi-layer gradient core-shell structure, belonging to the field of preparation and modification of functional polymer materials. Background technique [0002] Polyvinyl chloride (PVC) is one of the four general-purpose polymer materials, and it is also a rare non-petroleum-based polymer material among many polymers. Because PVC is mainly produced by the calcium carbide method, it hardly depends on petroleum resources. Its excellent mechanical properties, self-extinguishing properties and relatively low price have made it widely used in toys, footwear, construction, decoration, agriculture and other fields. At present, the global production of PVC has exceeded 40 million tons per year. And more than 50% of them are used in the manufacture of PVC building materials, which means that during the processing of...

Claims

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Application Information

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IPC IPC(8): C08F265/04C08F220/14C08F212/08C08F214/06C08F220/44C08F2/24C08L27/06C08L51/00
Inventor 王继亮蔡辉王建林
Owner 乌鲁木齐市华泰隆化学助剂有限公司
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