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Polyacrylate latex subjected to suspension graft copolymerization with vinyl chloride

A technology of polyacrylate and suspension grafting, which is applied in the field of latex, can solve the problems of irregular resin shape, lower resin heat resistance level, and difficult plasticization processing, etc., and achieve the effect of low ion concentration in the emulsion

Inactive Publication Date: 2012-12-05
SICHUAN PROVINCE JINLU RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the residual emulsifier, initiator and other components in ACR latex may even lead to the explosion of PVC suspension polymerization.
[0007] Even if ACR latex is copolymerized with vinyl chloride, if the formula is improper, it will lead to the following unfavorable situations: 1. The shape of the resin is irregular, resulting in difficulties in plasticizing and processing
2. The thermally unstable structure increases, which reduces the heat resistance level of the resin
3. The impact resistance performance is not improved much, while other strength properties are reduced more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] at 2m 3 First add 150Kg butyl acrylate (BA) and 75Kg 2-ethylhexyl acrylate (EHA), 3.75Kg Tween 60 and 3kg sodium lauryl sulfate compound emulsifier, 320Kg distilled water, and heat up to 65 ℃, stir and emulsify evenly, add ammonia water to adjust the pH value to 8.5, then raise the temperature to 80 ℃, evenly add 50Kg of aqueous solution dissolved with 0.9Kg ammonium persulfate dropwise, and keep warm for 1 hour.

[0020] Add the remaining core layer monomer (90KgBA+45KgEHA+190Kg distilled water and 2Kg Tween 60, 2kg sodium lauryl sulfate, emulsified at 65°C in advance) to the above seed latex, and evenly add 0.55Kg persulfate Ammonium distilled water 30Kg, after continuing to keep warm for 1 hour, add 2Kg of 1,4 butanediol diacrylate.

[0021] Mix 40Kg methyl methacrylate (MMA) in 60Kg distilled water in advance, add 0.7Kg Tween 60 and 0.5kg sodium lauryl sulfate as emulsifier, complete pre-emulsification at 65°C, add as shell monomer To the aforementioned reaction s...

Embodiment 2

[0024] First add 150Kg butyl acrylate (BA) and 75Kg 2-ethylhexyl acrylate (EHA), 3.00Kg Span 60, 3kg sodium lauryl sulfate, 320Kg distilled water into a 2m3 reactor, heat up to 65°C, fully Stir and emulsify evenly, add ammonia water to adjust the pH value to 8.5, then raise the temperature to 80°C, and evenly add 50Kg of an aqueous solution in which 0.9Kg of ammonium persulfate is dissolved. Incubate for 1 hour.

[0025] Add the remaining core layer monomer (90KgBA+45KgEHA+190Kg distilled water and 2Kg Span 60 and 2kg sodium lauryl sulfate to the above seed latex, and emulsify at 65°C in advance), and evenly add 0.55Kg persulfate Ammonium distilled water 30Kg, after continuing to keep warm for 1 hour, add 2Kg of 1,4 butanediol diacrylate.

[0026] Mix 40Kg methyl methacrylate (MMA) in 60Kg distilled water in advance, add 0.6Kg Span 60 and 0.6kg sodium lauryl sulfate as emulsifier, complete pre-emulsification at 65°C, add as shell monomer To the aforementioned reaction system...

Embodiment 3

[0029] First add 150Kg butyl acrylate (BA) + 75Kg 2-ethylhexyl acrylate (EHA), 3.00KgSDS, 3kgOP-10, 320Kg distilled water into a 2m3 reactor, heat up to 65°C, fully stir and emulsify evenly, add ammonia water to adjust The pH value was 8.5, and then the temperature was raised to 80° C., and 50 Kg of an aqueous solution in which 0.9 Kg of ammonium persulfate was dissolved was evenly added dropwise. Incubate for 1 hour.

[0030] Add the remaining core layer monomer (90KgBA+45KgEHA+190Kg distilled water and 1.5KgSDS, 1.5kgOP-10 emulsified at 65°C in advance) to the above seed latex, add 30Kg of distilled water with 0.55Kg ammonium persulfate evenly, continue After heat preservation reaction for 1 hour, 2Kg of 1,4 butanediol diacrylate was added.

[0031] Mix 40Kg methyl methacrylate (MMA) in 60Kg distilled water in advance, add 0.5KgSDS and 0.5kgOP-10 as emulsifier, complete pre-emulsification at 65°C, and add it to the aforementioned reaction system as a shell monomer. 10Kg of...

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Abstract

The invention discloses polyacrylate latex subjected to suspension graft copolymerization with vinyl chloride. The polyacrylate latex has a core-shell structure, and comprises the following components in parts by weight: 10 to 90 parts of core monomer, 10 to 90 parts of shell monomer, 0.5 to 1.5 parts of crosslinker, 0.2 to 1.0 part of azobis(nitrile) initiator or inorganic peroxide initiator and 3 to 8 parts of complex-type emulsifier. The combined emulsifier and initiator formula is used to synthesize the polyacrylate latex with the core-shell structure, the ion concentration is low, and the polyacrylate latex can be directly subjected to the suspension graft copolymerization with the vinyl chloride without separating and drying to produce a high-impact PVC (polyvinyl chloride) special compound.

Description

technical field [0001] The invention belongs to the field of latex, and in particular relates to a polyacrylate latex capable of suspension graft copolymerization with vinyl chloride and a preparation method thereof. Background technique [0002] Both the production and consumption of polyvinyl chloride (PVC) rank second among the five general-purpose resins. However, the general-purpose polyvinyl chloride resin is brittle, and an impact modifier needs to be added to improve its impact resistance. Commonly used impact modifiers are CPE (chlorinated polyethylene), MBS (methyl methacrylate-styrene-butadiene), and ACR (methyl methacrylate-alkyl acrylate compositions) ) and other three categories. Among them, MBS and ACR impact modifiers containing rubber phase can improve the impact resistance of PVC products the most. [0003] Impact modifiers can be introduced into polyvinyl chloride resin through physical and chemical methods. Physical method: that is, by externally addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F236/06C08F214/06C08F220/14C08F212/08C08F222/14C08F220/40C08F2/30C08F2/28C08F2/26C08F4/30C08F4/04C08F267/06C08F2/18
Inventor 黄传华石亮李成
Owner SICHUAN PROVINCE JINLU RESIN
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