Impact-modified poly vinyl chloride polymer blend

Abstract

The invention relates to a kind of polyvinyl-chlorid blend with impact modification. The invention mainly solves the problem that bad compatibility and bad binding force of nucleus and shell cause the bad impact property of polyvinyl-chlorid blend with impact modification in modifying polyvinyl-chlorid with putamen material by previous technology. In the invention, use acrylic acid carbalkoxy polymer and acrylic acid carbalkoxy-methyl methacrylate copolymer compatiblizing agent as nucleus, use methyl methacrylate as shell, and nucleus-shell are connected with compatiblizing agent. The invention can solve the problems mentioned above through the technical proposal of impact modification polyvinyl-chlorid with acrylate putamen polymer described above, and it can be used in industrial production.

Description

technical field

[0001] The invention relates to an impact-modified polyvinyl chloride blend, in particular to a polyvinyl chloride blend using an acrylate core-shell polymer as an impact modifier. Background technique

[0002] Polyvinyl chloride is widely used due to its excellent mechanical properties and chemical properties. However, due to its poor impact resistance, polyvinyl chloride resin itself needs to add impact modifiers to improve its impact properties. At present, methacrylic acid is more widely used. Methyl ester-butadiene-styrene graft copolymer (MBS), but because the double bonds in MBS make it easy to degrade under ultraviolet light, the impact performance of polyvinyl chloride modified with MBS will decrease when it is used outdoors for a long time More, poor weather resistance. Weatherable PVC impact modifiers are typically based on acrylate core-shell polymers and have been widely used in outdoor applications such as pipes, ...

Examples

Embodiment 1

[0032] 1) Preparation of alkyl acrylate polymer

[0033] Add 800 grams of deionized water, 0.5 grams of sodium dodecylbenzenesulfonate, 80 grams of butyl acrylate, and 2 grams of hexamethylene diacrylate into a polymerization kettle equipped with a thermometer, a stirrer, a nitrogen gas introduction device, and a monomer feeding device. alcohol esters. The temperature of the reactant was raised to 70° C. with stirring, and nitrogen gas was continuously blown in. After the reaction was initiated, continuously add the pre-emulsion containing 800 gram deionized water, 10 gram sodium dodecylbenzenesulfonate, 680 gram butyl acrylate, 18 gram hexanediol diacrylate and 7.5 gram ammonium persulfate, about Added within 2 hours. After the dropwise addition, the reaction was continued for 2 hours to obtain an alkyl acrylate polymer latex (A) with a particle diameter of 200 nanometers.

[0034] 2) Preparation of copolymer of alkyl acrylate-methyl methacrylate

[0035] Add 0.3 gram of ...

Embodiment 2

[0052] The preparation process is similar to that of Example 1, except that the amount of methyl methacrylate added in the process 3) in the preparation of the methyl methacrylate polymer is 247 grams. The maximum temperature rise during this process was about 3°C.

[0053] The acrylate core-shell polymer prepared in this example was prepared into a polyvinyl chloride blend according to the preparation process in Example 1, and the performance test results are shown in Table 1

technical field

[0001] The invention relates to an impact-modified polyvinyl chloride blend, in particular to a polyvinyl chloride blend using an acrylate core-shell polymer as an impact modifier. Background technique

[0002] Polyvinyl chloride is widely used due to its excellent mechanical properties and chemical properties. However, due to its poor impact resistance, polyvinyl chloride resin itself needs to add impact modifiers to improve its impact properties. At present, methacrylic acid is more widely used. Methyl ester-butadiene-styrene graft copolymer (MBS), but because the double bonds in MBS make it easy to degrade under ultraviolet light, the impact performance of polyvinyl chloride modified with MBS will decrease when it is used outdoors for a long time More, poor weather resistance. Weatherable PVC impact modifiers are typically based on acrylate core-shell polymers and have been widely used in outdoor applications such as pipes, ...

Examples

Embodiment 1

[0032] 1) Preparation of alkyl acrylate polymer

[0033] Add 800 grams of deionized water, 0.5 grams of sodium dodecylbenzenesulfonate, 80 grams of butyl acrylate, and 2 grams of hexamethylene diacrylate into a polymerization kettle equipped with a thermometer, a stirrer, a nitrogen gas introduction device, and a monomer feeding device. alcohol esters. The temperature of the reactant was raised to 70° C. with stirring, and nitrogen gas was continuously blown in. After the reaction was initiated, continuously add the pre-emulsion containing 800 gram deionized water, 10 gram sodium dodecylbenzenesulfonate, 680 gram butyl acrylate, 18 gram hexanediol diacrylate and 7.5 gram ammonium persulfate, about Added within 2 hours. After the dropwise addition, the reaction was continued for 2 hours to obtain an alkyl acrylate polymer latex (A) with a particle diameter of 200 nanometers.

[0034] 2) Preparation of copolymer of alkyl acrylate-methyl methacrylate

[0035] Add 0.3 gram of ...

Embodiment 2

[0052] The preparation process is similar to that of Example 1, except that the amount of methyl methacrylate added in the process 3) in the preparation of the methyl methacrylate polymer is 247 grams. The maximum temperature rise during this process was about 3°C.

[0053] The acrylate core-shell polymer prepared in this example was prepared into a polyvinyl chloride blend according to the preparation process in Example 1, and the performance test results are shown in Table 1