resin composition

Abstract

The present invention aims to maximize the impact absorption efficiency of rubber particles and eliminate the mechanical properties of recycled thermoplastic resins by manufacturing the new resin using a diene-based graft copolymer consisting of large-diameter and small-diameter rubber particles.

Claims

1. The composition comprises a recycled resin, a newly formed graft copolymer, and a newly formed non-graft copolymer. The aforementioned nascent graft copolymer composition is A first graft copolymer comprising a first conjugated diene polymer having an average particle size of 75 nm or more and 220 nm or less, It comprises a second graft copolymer containing a second conjugated diene polymer having an average particle size of 250 nm or more and 400 nm or less, The newly formed graft copolymer composition is a resin composition containing 8% to 50% by weight of the first conjugated diene polymer, relative to the total content of the first conjugated diene polymer and the second conjugated diene polymer.

2. The resin composition according to claim 1, wherein the recycled resin is contained in an amount of 70 to 88 parts by weight with respect to 100 parts by weight of the recycled resin, the newly formed graft copolymer composition, and the newly formed non-graft copolymer.

3. The resin composition according to claim 1, wherein the recycled resin is contained in an amount of 75 to 85 parts by weight of the recycled resin with respect to 100 parts by weight of the newly formed graft copolymer composition and the newly formed non-graft copolymer.

4. The resin composition according to claim 1, wherein, with respect to 100 parts by weight of the recycled resin, the newly formed graft copolymer composition, and the newly formed non-graft copolymer, the newly formed graft copolymer is contained in an amount of 10 to 18 parts by weight, and the newly formed non-graft copolymer is contained in an amount of 1 to 15 parts by weight.

5. The resin composition according to claim 1, wherein the newly formed graft copolymer composition contains 10% to 43% by weight of the first conjugated diene polymer based on the total content of the first conjugated diene polymer and the second conjugated diene polymer.

6. The resin composition according to claim 1, wherein the average particle size of the first conjugated diene polymer is 78 nm or more and 208 nm or less.

7. The recycled resin has an Izod impact strength of 7 kg·cm / cm or more and 12 kg·cm / cm or less, as measured in accordance with ASTM D256. The resin composition according to claim 1, wherein the flow index measured in accordance with ASTM D1238 is 25 g / 10 min or more and 35 g / 10 min or less.

8. The aforementioned resin composition has an Izod impact strength of 17.0 kg·cm / cm or higher, as measured in accordance with ASTM D256. The tensile strength measured according to ASTM D638 was 395 kg / cm². ２ That's all. The resin composition according to claim 1, wherein the flow index measured under conditions of 220°C and 10 kg in accordance with ASTM D1238 is 26.0 g / 10 min or more.

9. The non-graft copolymer comprises aromatic vinyl monomer units and vinyl cyanide monomer units. The resin composition according to claim 1, wherein the first graft copolymer and the second graft copolymer each further comprise aromatic vinyl monomer units and vinyl cyanide monomer units.

10. When the cross-section of the impact test specimen of the aforementioned resin composition is observed using TEM imaging, The resin composition according to claim 1, wherein cavities are observed inside the first graft copolymer and the second graft copolymer.

11. A step of producing a new graft copolymer composition by carrying out graft polymerization in the presence of a first conjugated diene polymer latex containing a first conjugated diene polymer having an average particle size of 75 nm or more and 220 nm or less, and a second conjugated diene polymer latex containing a second conjugated diene polymer having an average particle size of 250 nm or more and 400 nm or less. The step includes mixing the manufactured new graft copolymer composition, the regenerated resin, and the new non-graft copolymer, A method for producing a resin composition, wherein the newly formed graft copolymer composition is produced by containing 8% to 50% by weight of the first conjugated diene polymer relative to the total content of the first conjugated diene polymer and the second conjugated diene polymer.

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