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Polyacrylate grafted vinyl chloride composite resin and preparation method thereof

A polyacrylate and composite resin technology, applied in the field of composite resin, can solve the problems of poor processing performance, copolymer resin tensile strength, modulus drop, poor weather resistance of copolymer resin, etc., and achieve high notched impact strength and processing fluidity Excellent, the effect of increasing the interface binding force

Inactive Publication Date: 2014-02-12
河北盛华化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, in order to improve the compatibility between toughening modifiers and PVC, the microstructure modification and new toughening technology of PVC resin have been developed. The limitations of strong dependence on blending processing conditions, low toughening efficiency, and poor weather resistance, while solving the problems of poor fluidity of the macromolecular chains of pure graft copolymers, low modulus of materials, and inconsistencies in the impact resistance and rigid modulus of products, etc. Disadvantages of both
1. Polyacrylate latex particles with a core-shell structure grafted with vinyl chloride, for example: patents CN1053202, CN1510064A, and CN1884327A disclose the use of polyacrylates with a core-shell structure (the shell layer contains aromatic vinyl copolymers) grafted with vinyl chloride, Its advantage lies in improving the inhomogeneity of macro-mixing; the disadvantages of this method are: a, thick transition layer, large amount of acrylate used, low toughening efficiency; b, high grafting rate, poor processability; c, crosslinking If the density is too high, it is difficult to recycle the leftovers; d. Adding other monomers such as styrene divinylbenzene to the shell layer will result in poor weather resistance and yellowing during processing; e. The reaction process is complicated and the conditions are harsh
2. Polyvinyl chloride molecular chain grafted polyacrylate, for example: Japan Zhongyuan Chemical produces acrylate grafted polyvinyl chloride copolymer resin. The shortcomings of this method are: a. Compared with general PVC resin, the tensile strength and modulus of the copolymer resin Substantial drop; b copolymer resin has poor weather resistance; c, macromolecular chain branching degree is high, the entanglement structure is complex and serious, and the flow performance is poor

Method used

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  • Polyacrylate grafted vinyl chloride composite resin and preparation method thereof
  • Polyacrylate grafted vinyl chloride composite resin and preparation method thereof
  • Polyacrylate grafted vinyl chloride composite resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of polyacrylate latex:

[0032] In a nitrogen atmosphere, use deionized water as a solvent, add sodium dodecylbenzenesulfonate, potassium persulfate, ammonium bicarbonate, and butyl acrylate to the solvent, and polymerize at 65°C for 2 hours to prepare polyacrylate latex ;

[0033] The dosage of each ingredient is as follows:

[0034]

[0035] (2) Preparation of polyacrylate grafted vinyl chloride composite resin:

[0036] Nitrogen replaced the air in the reactor, and added deionized water, polyacrylate latex, sodium bicarbonate, hydroxypropyl methylcellulose, and cumyl peroxide neodecanoate in turn to the reactor, and stirred evenly; then Add vinyl chloride and react at 0.65MPa and 45°C; stop the reaction when the pressure of the reactor drops to 0.6MPa, discharge, dehydrate, and dry to obtain polyacrylate grafted vinyl chloride composite resin;

[0037] The dosage of each ingredient is as follows:

[0038]

Embodiment 2

[0040](1) Preparation of polyacrylate latex:

[0041] In a nitrogen atmosphere, use deionized water as a solvent, add sodium lauryl sulfate, ammonium persulfate, sodium hydroxide, and 2-ethylhexyl acrylate to the solvent, and polymerize at 95°C for 1 hour to prepare polyacrylic acid Ester latex;

[0042] The dosage of each ingredient is as follows:

[0043]

[0044] (2) Preparation of polyacrylate grafted vinyl chloride composite resin:

[0045] Replace the air in the reaction kettle with nitrogen, add deionized water, polyacrylate latex, sodium hydroxide, polyvinyl alcohol, dibenzoyl peroxide and dibutyltin dilaurate to the reaction kettle in sequence, and stir evenly; then add chlorine Ethylene, react at 1.05MPa and 65°C; stop the reaction when the pressure of the reactor is reduced to 0.6MPa, discharge, dehydrate, and dry to obtain polyacrylate grafted vinyl chloride composite resin;

[0046] The dosage of each ingredient is as follows:

[0047]

Embodiment 3

[0049] (1) Preparation of polyacrylate latex:

[0050] In a nitrogen atmosphere, using deionized water as a solvent, adding sodium dodecylsulfonate, ammonium persulfate, sodium carbonate and a mixture of isobutyl acrylate and 1,4-butanediol diacrylate to the solvent, Polyacrylate latex was prepared by polymerizing at 80°C for 2 hours;

[0051] The dosage of each ingredient is as follows:

[0052]

[0053]

[0054] (2) Preparation of polyacrylate grafted vinyl chloride composite resin:

[0055] Nitrogen replaced the air in the reaction kettle, and added deionized water, polyacrylate latex, sodium carbonate, methylcellulose, azobisisobutyronitrile and fatty acid zinc to the reaction kettle in sequence, and stirred evenly; then added vinyl chloride, and React at 1.05MPa and 65°C; stop the reaction when the pressure of the reactor drops to 0.6MPa, discharge, dehydrate, and dry to obtain polyacrylate grafted vinyl chloride composite resin;

[0056] The dosage of each ingre...

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Abstract

The invention relates to a polyacrylate grafted vinyl chloride composite resin and a preparation method thereof. The polyacrylate grafted vinyl chloride composite resin is prepared from the following components in parts by weight: 100 parts of vinyl chloride, 2-15 parts of polyacrylate latex (calculating by solid content), 100-200 parts of deionized water, 0.08-0.16 part of a dispersant, 0.025-0.040 part of an oil-soluble initiator and 0.006-0.009 part of a pH value adjusting agent. Polyacrylate latex is prepared by: continuing to dropwise add or not add acrylate into the system after acrylate is subjected to a polymerization reaction at 65-95 DEG C. The prepared polyacrylate grafted vinyl chloride composite resin is good in impact resistance, short in plasticizing time and excellent in processing fluidity.

Description

technical field [0001] The invention relates to a composite resin, in particular to a polyacrylate grafted vinyl chloride composite resin and a preparation method thereof. Background technique [0002] Polyvinyl chloride resin is widely used due to its excellent mechanical properties, chemical resistance, flame retardancy and electrical insulation properties. It is one of the most widely used general-purpose plastics in the world, and its output is second only to polyethylene. Second, it has been widely used in various fields such as construction, chemical industry, electrical instruments, daily necessities, etc. However, since the polyvinyl chloride resin itself is sensitive to the notch, the notched impact strength is low (only 3.5kJ / m 2 About), poor weather resistance, poor processing performance and other shortcomings greatly limit its application in areas with high performance requirements. [0003] The toughening modification of polyvinyl chloride (PVC) is usually ac...

Claims

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Application Information

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IPC IPC(8): C08F265/04C08F214/06C08F2/20C08L51/00
Inventor 刘文献潘明旺沈小宁王会昌赵惠冯涛张留成郭桂花袁金凤任继胜张兵兵张兰华宋晓明
Owner 河北盛华化工有限公司
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