Preparation method of high-rigidity toughening material for PVC

A high-rigidity and toughening technology, applied in the field of preparation of high-rigidity and toughening materials, can solve the problems of high price, poor aging resistance, and weak rigidity, and achieve the goal of improving rigidity and heat resistance, and improving toughening effect Effect

Active Publication Date: 2020-03-24
常州市五洲环保科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MBS, NBR and ABS have poor aging resistance due to the double bond in their molecular structure, so they can only be used in special occasions and are expensive; ACR and CPE have excellent aging resistance and a wide range of applications, although ACR has better overall performance than CPE. Excellent, but its price is about 40% higher than CPE, which limits its use. CPE can basically meet the requirements of use, the price is the lowest, and the current usage is the largest
However, the above toughening agents all have the problem that rigidity and toughness cannot be balanced. Often the toughness is improved, but it will also bring about the defects of decreased strength, weaker rigidity, and lower heat distortion temperature.

Method used

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  • Preparation method of high-rigidity toughening material for PVC

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Experimental program
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Effect test

Embodiment 1

[0018] A kind of preparation method of high rigidity toughening material for PVC of the present invention comprises the following steps:

[0019] (1) Mix rubber latex and ammonium terephthalate solution evenly;

[0020] (2) Slowly add the calcium hydroxide slurry to the mixed solution in step (1) under constant stirring, and continue to react for 5 minutes to obtain the precursor;

[0021] (3) Put the precursor obtained in step (2) into the autoclave and continue to react for 5 hours at 125°C;

[0022] (4) The material obtained in step (3) is filtered, washed, and dried to obtain a finished product of high rigidity and toughening material.

[0023] Described rubber latex is nitrile latex, and its gel content is 35%.

[0024] The mass percent concentration of the ammonium terephthalate solution is 2%.

[0025] The mass ratio of calcium terephthalate and nitrile rubber generated by the ammonium terephthalate and calcium hydroxide is 60:40.

[0026] The calcium hydroxide slur...

Embodiment 2

[0030] The difference between embodiment 2 and embodiment 1 is: a kind of preparation method of high rigidity toughened material for PVC of the present invention comprises the following steps:

[0031] In step (3), the precursor is added into the autoclave and reacted at 145° C. for 2 hours.

[0032] Described rubber latex is acrylate latex, and its gel content is 70%.

[0033] The mass percent concentration of the ammonium terephthalate solution is 15%.

[0034] The mass ratio of calcium terephthalate and acrylate rubber generated by the ammonium terephthalate and calcium hydroxide is 95:5.

[0035] The calcium hydroxide slurry is obtained by dissolving and dispersing solid calcium hydroxide in hot water at 90° C., and the mass percent concentration of the calcium hydroxide slurry is 25%.

Embodiment 3

[0037] The difference between embodiment 3 and embodiment 1 is: a kind of preparation method of high rigidity toughening material for PVC of the present invention comprises the following steps:

[0038] In step (3), the precursor was added into the autoclave to continue the reaction at 135° C. for 4 hours.

[0039] Described rubber latex is neoprene latex, and its gel content is 55%.

[0040] The mass percent concentration of the ammonium terephthalate solution is 8%.

[0041] The mass ratio of calcium terephthalate to acrylate rubber generated by the ammonium terephthalate and calcium hydroxide is 75:25.

[0042] The calcium hydroxide slurry is obtained by dissolving and dispersing solid calcium hydroxide in hot water at 70° C., and the mass percent concentration of the calcium hydroxide slurry is 18%.

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Abstract

The invention discloses a preparation method of a high-rigidity toughening material for PVC. The preparation method of a high-rigidity toughening material comprises the following steps: (1) uniformlymixing rubber latex with an ammonium terephthalate solution; (2) slowly adding calcium hydroxide slurry into the mixed solution obtained in the step (1) under continuous stirring, and continuing reaction for 5min to obtain a precursor; (3) adding the precursor obtained in the step (2) into a high-pressure kettle, and continuing reaction at 125-145 DEG C for 2-5h; and (4) filtering, washing and drying the material obtained in the step (3) to obtain a finished high-rigidity toughening material. The method is simple and easy to implement, three wastes are not generated in the production process,the obtained high-rigidity toughening material has good stiffening and toughening effects on PVC, and the contradiction between the rigidity and toughness of the product is balanced.

Description

technical field [0001] The product prepared by the invention is suitable for PVC formula, and in particular relates to a preparation method of a high-rigidity toughening material that can simultaneously improve the rigidity and toughness of PVC. Background technique [0002] Rigid PVC has low impact strength and poor low temperature resistance. In order to expand the application range, it must be toughened and modified. At present, the main types of tougheners on the market are methyl methacrylate-butadiene-styrene copolymer (MBS), acrylonitrile and butadiene random copolymer (NBR), methyl methacrylate and acrylic acid Copolymers of monomers such as esters (ACR), chlorinated polyethylene (CPE), acrylonitrile-butadiene-styrene copolymers (ABS), etc. MBS, NBR and ABS have poor aging resistance due to the double bond in their molecular structure, so they can only be used in special occasions and are expensive; ACR and CPE have excellent aging resistance and a wide range of app...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L9/04C08L33/04C08L11/02C08K5/098C08K7/02
CPCC08L27/06C08L2201/08C08L9/04C08L33/04C08L11/02C08K5/098C08K7/02
Inventor 张莉娜蒋丽刘尚才方春平
Owner 常州市五洲环保科技有限公司
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