Preparation method of functionalized polyacrylate composite emulsion for low temperature toughening modification of nylon 6

A technology of polyacrylate and toughening modification, which is applied in the field of preparation of functionalized polyacrylate composite emulsion, and can solve problems such as difficult control of toughening agent preparation process, uniform dispersion of toughening agent, limitation of stability of modification effect, etc. , to achieve the effect of improving dimensional stability, rigidity and processing performance

Active Publication Date: 2016-06-08
HEBEI UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage of this method is that it is not easy to control the preparation process of the toughening agent and the uniform dispersion of the toughening agent in the matrix resin, and the stability of the modification effect is limited.

Method used

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  • Preparation method of functionalized polyacrylate composite emulsion for low temperature toughening modification of nylon 6
  • Preparation method of functionalized polyacrylate composite emulsion for low temperature toughening modification of nylon 6
  • Preparation method of functionalized polyacrylate composite emulsion for low temperature toughening modification of nylon 6

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Embodiment 1

[0034] a, surface modification of nano-calcium carbonate: Weigh 1g of bis(dioctylpyrophosphoryl)oxyacetate titanium, and add it to a beaker containing 20g of acetone, and prepare a titanate coupling agent acetone dispersion solution, 20g of calcium carbonate with an average particle size of 30nm was added to the above dispersion, filtered after ultrasonication at 60°C for 2h, rinsed with acetone to remove excess titanate coupling agent, and then filtered The cake was vacuum-dried at 100° C. for 4 hours to obtain surface-modified nano-calcium carbonate.

[0035]b, preparation of seed emulsion: add 0.5g of emulsifier sodium dodecyl biphenyl sulfonate, 10g of modified nano-calcium carbonate obtained from step a and 140g of deionized water into a 500mL four-necked flask, stir and sonicate for 60min , so that it is uniformly dispersed to obtain a seed emulsion.

[0036] c, pre-emulsification of the core layer monomer: 0.6g crosslinking agent 1,6 hexanediol diacrylate, 1.875g emuls...

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Abstract

The invention relates to a preparation method of a functional polyacrylate composite emulsion for modifying the low-temperature toughness of nylon 6. The preparation method of the functional polyacrylate composite emulsion comprises the following steps: (a) modifying the surface of nano calcium carbonate; (b) preparing a seed emulsion; (c) preemulsifying a core-layer monomer; (d) preemulsifying a shell-layer monomer; (e) preparing an initiator solution; and (f) obtaining the functional polyacrylate composite emulsion. The adopted seed is surface-modified nano calcium carbonate which is capable of effectively improving or adjusting the rigidity, toughness, smoothness and bending strength of the product, is further capable of improving the processing performance, the dimensional stability and the thermal stability of the product and has filling, reinforcing and toughening functions. The adopted soft monomer polymer is polyisooctyl acrylate, and the glass transition temperature of the polyisooctyl acrylate is far below the room temperature, so that the polyisooctyl acrylate has good flexibility at low temperature, and the low-temperature toughness of nylon 6 can be improved.

Description

technical field [0001] The invention belongs to the field of modification of engineering plastics, and relates to a preparation method of functionalized polyacrylate composite emulsion for low-temperature toughening modification of nylon 6. Background technique [0002] Nylon 6 was first developed by scientist P. Schlach in 1938, and was later industrialized by a German company. But it was mainly used as a fiber at first, and was later developed as an engineering plastic product. Nylon 6 is a linear macromolecule with a very regular structure. The macromolecular chain contains amide bonds and can form hydrogen bonds. It has excellent characteristics such as wear resistance, good strength, corrosion resistance and self-lubrication, and is widely used in industries such as machinery, electronic appliances, automobiles and chemical building materials. However, nylon 6 also has some shortcomings, such as low notched impact strength, poor dry and low temperature impact properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F222/14C08F220/06C08F220/14C08F2/26C08K9/04C08K3/26C08L77/02C08L33/08B29C47/92B29C48/92
Inventor 李国华马静张广林何连岐姚艳梅瞿雄伟
Owner HEBEI UNIV OF TECH
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