MBS resin with impact resistance, stress crease and fold resistance and excellent transparency

A stress-resistant and impact-resistant technology, applied in the field of MBS resin, can solve problems such as reduced transparency, and achieve the effects of improving light transmittance, improving impact strength, and improving stress whitening resistance.

Active Publication Date: 2015-03-25

SHANDONG RUIFENG CHEM

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Problems solved by technology

In addition, the impact resistance and transparency of MBS are also contradictory, and t...

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Abstract

The invention discloses MBS resin with impact resistance, stress crease and fold resistance and excellent transparency and belongs to the only high-molecular compound obtained through C-C unsaturated bond reaction. The MBS resin contains fluorine, comprises a repetition structure unit from hexafluoropropylene in the molecular structure and is realized in the following steps: in the seed emulsion preparation steps, styrene and butadiene polymerization monomers as well as hexafluoropropylene polymerization monomers are added to participate in emulsion polymerization reaction. The polyvinyl chloride modifier MBS resin product which can improve the shock strength and the stress crease and fold resistance and is high in light transmittance and excellent in optical performance is provided, so that the shock strength of the MBS resin is remarkably improved, the stress crease and fold resistance is radically improved, the light transmittance is improved, and the MBS particle diameter is increased from 80nm to 240 nm.

Technology Topic

EmulsionChemistry +10

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Examples

Experimental program(2)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0051] Example 1

[0052] Prepare the MBS resin with impact resistance, stress whitening resistance and high light transmittance of the present invention according to the following steps

[0053] ①. Preparation of seed emulsion:

[0054] a. Feeding heating

[0055] In the seed emulsion polymerization reactor, 60 parts by weight of non-ionized water, 0.2 parts by weight of potassium stearate as emulsifier, 0.08 parts by weight of potassium perfluoroalkyl ether carboxylate as dispersant, 0.3 parts by weight of potassium chloride as electrolyte, 0.04 parts by weight of dodecyl mercaptan as molecular weight regulator, 0.3 parts by weight of diallyl phthalate as crosslinking agent, 12 parts by weight of styrene, 0.08 parts by weight of initiator potassium persulfate, and high-purity nitrogen to replace the inside of the kettle After airing, add 17 parts by weight of butadiene and 6 parts by weight of hexafluoropropylene; stir and mix for 15-30 minutes, slowly raise the temperature, and raise the temperature to 48°C in half an hour;

[0056] b. Aggregation

[0057] The polymerization process conditions are as follows:

[0058] Reaction temperature ℃ 48~75

[0059] Reaction pressure M Pa 0.1~1.2

[0060] Reaction time hours 8

[0061] When the pressure is less than 0.1MPa, stop stirring;

[0062] c. Degassing

[0063] Use nitrogen to press the reacted latex into the degassing tank, and use vacuum and emptying method to degas. After sampling and testing the residual monomer amount is qualified, it is cooled to room temperature and discharged; it is placed on a stainless steel through a 140 mesh filter Reserve in the storage tank to measure the solid content;

[0064] ②. Preparation of MBS latex

[0065] a. Feeding heating

[0066] Into the MBS latex polymerization reactor, put 25 parts by weight of non-ionized water and all the seed latex prepared in step ①, under stirring, heat up to 70-73°C, and add 0.1 parts by weight of initiator potassium persulfate;

[0067] b. Graft emulsion polymerization

[0068] In the reaction kettle treated in step a, first add 4 parts by weight of styrene, then 5 parts by weight of methyl methacrylate, 0.1 parts by weight of potassium stearate as emulsifier, and 0.01 parts by weight of potassium persulfate as initiator, and stir Bottom, react for 2 hours, keep warm for 1.5 hours, take a sample and check, after the solid content of the emulsion is cooled to below 60C, put it in a stainless steel storage tank for later use;

[0069] ③. Cohesion, washing, drying

[0070] Using continuous demulsification method, the MBS emulsion prepared in step ② is demulsified. After the demulsification is completed, the material is pressed from the demulsification kettle to the washing tank, add an appropriate amount of deionized water, stir for 15 minutes, change the water and stir again, and cycle operation Three times, the emulsion is transported to the high-position tank of the slurry through the slurry pump; the centrifuge is dehydrated, and heated and dried with steam. The temperature of the drying bed is controlled between 30 and 85°C. After drying, the temperature is lowered and sieved to obtain the finished MBS.

Example

[0071] Examples 2-7

[0072] According to the method and steps of Example 1, the MBS resin with impact resistance, stress whitening resistance and high light transmittance of the present invention was prepared according to the raw material formula of Table 1

[0073] Table 1

[0074]

[0075]

[0076]

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Classification and recommendation of technical efficacy words

High impact strength
High light transmittance

MBS resin with impact resistance, stress crease and fold resistance and excellent transparency

A stress-resistant and impact-resistant technology, applied in the field of MBS resin, can solve problems such as reduced transparency, and achieve the effects of improving light transmittance, improving impact strength, and improving stress whitening resistance.

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

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Description & Claims & Application Information

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