阅读说明：本技术 改性聚碳酸酯共混物的方法 (Method for modifying polycarbonate blends ) 是由 陈亮 C·A·克鲁兹 Y·圣-杰勒德 黄晔 M·J·克里明斯 D·J·哈索 于 2018-12-04 设计创作，主要内容包括：提供改性聚碳酸酯和丙烯腈/丁二烯/苯乙烯共聚物的共混物的方法,包括向共混物添加复合颗粒,其中复合颗粒包括(I)部分交联的聚烯烃核,以及(II)包括一种或多种乙烯基单体的聚合单元的全部或部分壳,以及所得的改性共混物。(A method of modifying a blend of polycarbonate and acrylonitrile/butadiene/styrene copolymer is provided comprising adding to the blend composite particles, wherein the composite particles comprise (I) a partially crosslinked polyolefin core, and (II) a full or partial shell comprising polymerized units of one or more vinyl monomers, and the resulting modified blend.)

1. A method of modifying a blend of polycarbonate and acrylonitrile/butadiene/styrene copolymer comprising adding composite particles to the blend, wherein the composite particles comprise

(I) A partially crosslinked polyolefin core, and

(II) a shell comprising all or part of polymerized units of one or more vinyl monomers.

2. The method of claim 1, wherein the vinyl monomer comprises one or more (meth) acrylate monomers.

3. The method of claim 1, wherein the vinyl monomer comprises one or more unsubstituted alkyl esters of (meth) acrylic acid.

4. The method of claim 1, wherein the partially crosslinked polyolefin core has a gel fraction of 50% or less.

5. The method of claim 1, wherein the partially crosslinked polyolefin core is prepared from a process comprising performing a crosslinking reaction on initial polyolefin particles, wherein the initial polyolefin particles comprise one or more polyolefins, and wherein each of the polyolefins in the initial polyolefin particles has a melt flow rate at 190 ℃ under a 2.16kg load of 50g per 10 minutes or greater.

6. A compounded composition comprising polycarbonate, acrylonitrile/butadiene/styrene copolymer and composite particles, wherein said composite particles comprise

(I) A partially crosslinked polyolefin core, and

(II) a shell comprising all or part of polymerized units of one or more vinyl monomers.

7. The composition according to claim 6, wherein the composition,

wherein the polycarbonate is present in an amount of 40 to 95% by weight based on the sum of the weights of the polycarbonate and the acrylonitrile/butadiene/styrene copolymer,

and wherein the composite particle is present in an amount of 1 to 40% by weight, based on the sum of the weight of the composite particle, the polycarbonate, and the acrylonitrile/butadiene/styrene copolymer.

8. The composition of claim 6, wherein the amount of the shell grafted to the core is 40% by weight or more based on the weight of the shell.

Example 4: compounding of composite particles with matrix polymers.

The aqueous dispersion of composite particles was spray dried according to the following procedure. The two-fluid nozzle atomizer was mounted in a mobileinor spray dryer (GEA Process Engineering, inc. copenhagen, denmark). The nitrogen pressure of the nozzle was fixed at 1bar and the flow rate was 50%, corresponding to an air flow rate of 6.0kg per hour. The glass bottle was placed under the cyclone and the valve at the bottom of the cyclone was opened. Olefin-acrylic dispersion (approximately 40 wt% solids) was pumped into the heating chamber by an emulsion feed pump. In N₂Spray drying experiments were carried out in the environment with the inlet temperature fixed at 120 ℃ and the outlet temperature controlled at 40 ℃ by adjusting the feed rate of the dispersion. The volume average particle size of the dry powder was measured to be in the range of 20-40 μm.

The Polycarbonate (PC) used was MAKRO L ON^TM2405 resin from covestro. abs is B L ENDEX^TM338, a high rubber ABS impact modifier, from Galata Chemicals, before compounding, PC was thoroughly dried in an oven at 110 ℃ for 2-4 hours, then ABS was dried at 23 ℃ under vacuum, PC, ABS and composite particles ("modifier") were mixed with JSW28 co-rotating twin screw extruder (L/D ═ 40), the resin and modifier were supplied to the feed throat of the extruder via a gravity K-Tron feeder, then melt blended, the extruded strand was cooled, then pelletized with a granulometer, the temperature profile of the extruder was 25-250-.

To use the injection-molded parts for testing, the compounded pellets were dried in a low-pressure dryer at 110 ℃ for 4 hours and injection-molded using a Battenfield HM80/120 machine at the following temperature profile: 280 ℃ and 285 ℃ and 290 ℃ from the hopper to the die. The holding pressure was set to 200 bar and the mold temperature was 80 ℃. Demold after a cooling time of 40 seconds.