CN105086313A - Flow modifier for polyvinyl chloride - Google Patents

Abstract

The invention discloses a flow modifier for polyvinyl chloride. The flow modifier for the polyvinyl chloride is prepared from the following raw materials in part by weight: 20-23 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 0.3-0.5 part of sodium dodecylbenzene sulfonate, 0.3-0.5 part of divinyl benzene, 0.3-0.4 part of potassium peroxymonosulfate, 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, 3-4 parts of silver nitrate, 11-14 parts of molybdenum sulphide, 8-10 parts of hydroxyethyl starch, 0.5-0.7 part of silane coupling agents kh550 and a defined amount of deionized water. The prepared flow modifier for the PVC (polyvinyl chloride) can be widely used for the field of PVC sections, tubes and plates; properties of impact resistances and high strength of PVC materials can be improved; and the flow modifier for the polyvinyl chloride is worthy of being popularized.

Description

A kind of polyvinyl-chloride use flow ability modifying agent

Technical field

The present invention relates to pvc properties-correcting agent technical field, particularly relate to a kind of polyvinyl-chloride use flow ability modifying agent.

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 polyvinyl-chloride use flow ability modifying agent.

The present invention is achieved by the following technical solutions:

A kind of polyvinyl-chloride use flow ability modifying agent, 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, Silver Nitrate 3-4, moly-sulfide 11-14, hydroxyl starch 8-10, silane coupling agent kh5500.5-0.7, deionized water are appropriate;

Described a kind of polyvinyl-chloride use flow ability modifying agent, 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) Silver Nitrate, moly-sulfide and hydroxyl starch are mixed, 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 Silver Nitrate added, moly-sulfide and hydroxyl starch can improve the mobility of properties-correcting agent, make its easy flow dispersion in pvc, PVC flow ability modifying agent prepared by the present invention, PVC profile can be widely used in, tubing, sheet material field, and the shock resistance of pvc material and the performance of the aspect such as high-strength can be improved, be worthy to be popularized.

Embodiment

A kind of polyvinyl-chloride use flow ability modifying agent, 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, Silver Nitrate 3, moly-sulfide 11, hydroxyl starch 8, silane coupling agent kh5500.5, deionized water are appropriate;

Described a kind of polyvinyl-chloride use flow ability modifying agent, 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) Silver Nitrate, moly-sulfide and hydroxyl starch are mixed, 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 27.2KJ/m2, and elongation at break is 211%, and yield strength is 17Mpa;

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 polyvinyl-chloride use flow ability modifying agent, 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, Silver Nitrate 3-4, moly-sulfide 11-14, hydroxyl starch 8-10, silane coupling agent kh5500.5-0.7, deionized water are appropriate.

2. a kind of polyvinyl-chloride use flow ability modifying agent 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) Silver Nitrate, moly-sulfide and hydroxyl starch are mixed, 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.