CN105086271A - Heat-resistant pvc (polyvinyl chloride) processing modifier - Google Patents

Abstract

The invention discloses a heat-resistant pvc (polyvinyl chloride) processing modifier. The heat-resistant pvc processing modifier comprises, by weight, 20-23 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 0.3-0.5 part of sodium dodecyl benzene sulfonate, 0.3-0.5 part of divinyl benzene, 0.3-0.4 part of potassium persulfate, 35-40 parts of nano calcium carbonate, 0.1-0.2 part of sodium stearate, 0.6-0.8 part of polyethylene oxide, 0.4-0.6 part of dimethyl silicone oil, 12-13 parts of waste bone china powder, 6-7 parts of plant ash, 8-10 parts of vermiculite powder, 0.5-0.7 part of silane coupling agents kh550 and an appropriate quantity of deionized water. The heat-resistant pvc processing modifier has the advantages that the manufactured processing modifier is excellent in processing plasticizing property, good in operability and suitable to be popularized and utilized on a large scale, excellent mechanical properties and the excellent impact-resistant performance can be kept, and a method is simple.

Description

A kind of heat-resisting pvc modifier

Technical field

The present invention relates to pvc properties-correcting agent technical field, particularly relate to a kind of heat-resisting pvc modifier.

Background technology

Along with PVC industry development, particularly economics of underdevelopment fast four increases, more rapid to the increase in demand of polyvinyl chloride, polyvinyl chloride is widely used due to performances such as its excellent corrosion-resistant, fire-retardant, insulation.But its fragility is comparatively large, erosion-resisting characteristics is not good, in order to improve the performance of polyvinyl chloride, expand its use range, initial people commonly use some small molecules softening agent, but these small molecules softening agent are in the processing and use procedure of goods, there is volatilization and migration, not only contaminate environment, simultaneously goods also can be made to become fragile, hardening, lose use value.Current people add properties-correcting agent toughening modifying and meet service requirements in the polyvinyl chloride course of processing.Wherein Rigid Particles Toughened pvc more and more causes the attention of people.Nano-calcium carbonate has less particle diameter, higher activity as common filler, fills pvc and can obtain good strengthening and toughening effect.But nano-calcium carbonate surface hydrophilic oleophobic, with the poor compatibility of matrix, is difficult to produce bonding force with pvc matrix, easily produces boundary defect, cause material property to decline.。

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of heat-resisting pvc modifier.

The present invention is achieved by the following technical solutions:

A kind of heat-resisting pvc modifier, is made up of the raw material of following weight part: methyl methacrylate 20-23, butyl acrylate 30-35, Sodium dodecylbenzene sulfonate 0.3-0.5, Vinylstyrene 0.3-0.5, Potassium Persulphate 0.3-0.4, nano-calcium carbonate 35-40, sodium stearate 0.1-0.2, polyoxyethylene 0.6-0.8, dimethyl silicone oil 0.4-0.6, give up china powder 12-13, plant ash 6-7, vermiculite power 8-10, silane coupling agent kh5500.5-0.7, deionized water are appropriate;

The heat-resisting pvc modifier of described one, be made up of following concrete steps:

(1) Sodium dodecylbenzene sulfonate and appropriate deionized water are added in reactor, stir 30min, then add butyl acrylate and Vinylstyrene emulsion reaction 1-2h, when adjusting the temperature to 75 ° of C, add the potassium persulfate solution of 1/3-1/2 times amount, continue reaction 2-2.5h, for subsequent use after cooling;

(2) product prepared by step (1) step (1) is added to is equipped with in the flask of agitator, logical nitrogen protection, add remaining potassium persulfate solution, open mechanical stirring, pre-emulsified methyl methacrylate is slowly dripped when being warming up to 75 ° of C, after dropping terminates, continue to stir 1-1.5h, for subsequent use after cooling;

(3) will give up china powder, plant ash and vermiculite power mixing, silane coupling agent kh550 is dissolved in ethanol by 1:5, be added drop-wise to mixed powder high speed again to stir, then under 120 ° of C, 30-40min is processed, finally polyoxyethylene is heated to melting and dimethyl silicone oil mixes, this mixture and the mixing of above-mentioned filler high-speed stirring are carried out coated;

(4) nano-calcium carbonate being added deionized water and stirring becomes solid content to be the slurries of 10-15%, be added in reactor, be heated to 80 ° of C while stirring, add sodium stearate again and stir 1-1.5h, filler prepared by emulsion synthetic for step (2) and step (3) is added in reactor, suction filtration after insulation reaction 1-1.5h, crushed after being dried.

Advantage of the present invention is: filler can be improved the lipophilicity of filling surface by the present invention through coupling agent treatment, again dimethyl silicone oil and polyoxyethylene are coated on filling surface and can reduce reactive force between matrix and filler in the composite, thus increased substantially the mechanical property of matrix material, improve resistance to impact shock, the present invention also adopts stearic acid sodium modified nano calcium carbonate, make its surperficial oleophilic drainage, increase the consistency with pvc matrix, and with emulsion, filler aqueous phase compound obtains Novel modifier and has pvc good toughness reinforcing, the effect strengthened, the useless china powder added, it is acidproof that plant ash and vermiculite power can improve pvc, high-strength, the performance of the aspect such as high temperature resistant, modifier prepared by the present invention has excellent processing plasticizing, and maintain excellent mechanical performances and shock resistance, method is simple, there is good operability, be suitable for promoting the use of on a large scale.

Embodiment

A kind of heat-resisting pvc modifier, is made up of the raw material of following weight part (kilogram): methyl methacrylate 20, butyl acrylate 30, Sodium dodecylbenzene sulfonate 0.3, Vinylstyrene 0.3, Potassium Persulphate 0.3, nano-calcium carbonate 35, sodium stearate 0.1, polyoxyethylene 0.6, dimethyl silicone oil 0.4, the china powder 12 that gives up, plant ash 6, vermiculite power 8, silane coupling agent kh5500.5, deionized water are appropriate;

The heat-resisting pvc modifier of described one, be made up of following concrete steps:

(1) Sodium dodecylbenzene sulfonate and appropriate deionized water are added in reactor, stir 30min, then add butyl acrylate and Vinylstyrene emulsion reaction 1h, when adjusting the temperature to 75 ° of C, add the potassium persulfate solution of 1/3 times amount, continue reaction 2h, for subsequent use after cooling;

(2) product prepared by step (1) step (1) is added to is equipped with in the flask of agitator, logical nitrogen protection, add remaining potassium persulfate solution, open mechanical stirring, pre-emulsified methyl methacrylate is slowly dripped when being warming up to 75 ° of C, after dropping terminates, continue to stir 1h, for subsequent use after cooling;

(3) will give up china powder, plant ash and vermiculite power mixing, silane coupling agent kh550 is dissolved in ethanol by 1:5, be added drop-wise to mixed powder high speed again to stir, then under 120 ° of C, 30min is processed, finally polyoxyethylene is heated to melting and dimethyl silicone oil mixes, this mixture and the mixing of above-mentioned filler high-speed stirring are carried out coated;

(4) nano-calcium carbonate is added deionized water and stirring become solid content be 10% slurries, be added in reactor, be heated to 80 ° of C while stirring, add sodium stearate again and stir 1h, filler prepared by emulsion synthetic for step (2) and step (3) is added in reactor, suction filtration after insulation reaction 1h, crushed after being dried.

Impact modifier embodiment prepared and pvc and auxiliary agent mixing are opened refining compression molding and are carried out performance test, and result is as follows: notched Izod impact strength is 23.8KJ/m2, and elongation at break is 215%, and yield strength is 21Mpa;

The pvc and auxiliary agent mixing that do not add properties-correcting agent are opened refining compression molding and carries out performance test, result is as follows: notched Izod impact strength is 4.6KJ/m2, and elongation at break is 1.6%, and yield strength is 14Mpa; Result shows that the pvc adding properties-correcting agent improves many than the pvc various aspects of performance of not adding properties-correcting agent, has significant reinforced effects.

Claims (2)

1. a heat-resisting pvc modifier, it is characterized in that, be made up of the raw material of following weight part: methyl methacrylate 20-23, butyl acrylate 30-35, Sodium dodecylbenzene sulfonate 0.3-0.5, Vinylstyrene 0.3-0.5, Potassium Persulphate 0.3-0.4, nano-calcium carbonate 35-40, sodium stearate 0.1-0.2, polyoxyethylene 0.6-0.8, dimethyl silicone oil 0.4-0.6, useless china powder 12-13, plant ash 6-7, vermiculite power 8-10, silane coupling agent kh5500.5-0.7, deionized water are appropriate.

2. a kind of heat-resisting pvc modifier according to claim 1, is characterized in that, be made up of following concrete steps:

(1) Sodium dodecylbenzene sulfonate and appropriate deionized water are added in reactor, stir 30min, then add butyl acrylate and Vinylstyrene emulsion reaction 1-2h, when adjusting the temperature to 75 ° of C, add the potassium persulfate solution of 1/3-1/2 times amount, continue reaction 2-2.5h, for subsequent use after cooling;

(2) product prepared by step (1) step (1) is added to is equipped with in the flask of agitator, logical nitrogen protection, add remaining potassium persulfate solution, open mechanical stirring, pre-emulsified methyl methacrylate is slowly dripped when being warming up to 75 ° of C, after dropping terminates, continue to stir 1-1.5h, for subsequent use after cooling;

(3) will give up china powder, plant ash and vermiculite power mixing, silane coupling agent kh550 is dissolved in ethanol by 1:5, be added drop-wise to mixed powder high speed again to stir, then under 120 ° of C, 30-40min is processed, finally polyoxyethylene is heated to melting and dimethyl silicone oil mixes, this mixture and the mixing of above-mentioned filler high-speed stirring are carried out coated;

(4) nano-calcium carbonate being added deionized water and stirring becomes solid content to be the slurries of 10-15%, be added in reactor, be heated to 80 ° of C while stirring, add sodium stearate again and stir 1-1.5h, filler prepared by emulsion synthetic for step (2) and step (3) is added in reactor, suction filtration after insulation reaction 1-1.5h, crushed after being dried.