Low yellowness styrene-acrylonitrile-maleic anhydride copolymer and preparation method thereof

A technology of maleic anhydride and styrene, which is applied in the field of low-yellow styrene-acrylonitrile-maleic anhydride copolymer and its preparation, can solve the problem of low-yellowness, which can only reach up to 10% by mass fraction, two-phase Adhesive phase state dispersion improvement effect is not obvious, affecting alloy product odor, residual sheet and other problems, to achieve the effect of improving two-phase adhesiveness, less color change, and improved thermal stability

Inactive Publication Date: 2018-12-18
嘉兴华雯化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the synthesis of this terpolymer at present, and there are some defects
Such as, the styrene-acrylonitrile-maleic anhydride terpolymer prepared by the patent CN1506386A is better than the styrene-maleic anhydride copolymer effect as a compatibilizer, but there are two problems: the one is that the acrylonitrile content Not high, the highest can only reach 10% according to the mass fraction, while the acrylonitrile content of conventional ABS and SAN resins are both above 20%, according to the principle of similar compatibility, the difference in acrylonitrile content of the two resins is within 5%. Compatibility, the difference is 5%-10% is partially compatible, and the difference is more than 10% is completely incompatible, so the terpolymer prepared by this patent has limited effect on actually improving the compatibility of the alloy
At the same time, the copolymer prepared in this document has a lot of residual monomers, which not only affects the smell and residue of the alloy product, but also affects its adhesion at the interface, because the free monomers are easy to reach the phase interface, which reduces its compatibility. The effect of the agent
In addition, the maleic anhydride content of the copolymer prepared in this document is low, and as a compatibilizer, the improvement effect on the two-phase adhesion and phase dispersion is not obvious, so when used as an alloy compatibilizer, it needs to be added in a higher amount to significantly improve The mechanical properties of the alloy

Method used

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  • Low yellowness styrene-acrylonitrile-maleic anhydride copolymer and preparation method thereof
  • Low yellowness styrene-acrylonitrile-maleic anhydride copolymer and preparation method thereof
  • Low yellowness styrene-acrylonitrile-maleic anhydride copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 0.1 part of DCP, 0.1 part of dodecyl mercaptan, 15 parts of styrene, 5 parts of acrylonitrile, and 1 part of methyl methacrylate into the reactor, stir evenly, the temperature of the reactor is 100°C, and the pressure is 1.2MPa 5 parts of maleic anhydride are dissolved in the remaining 59 parts of styrene and 14 parts of acrylonitrile, and the dissolved solution is dropped into the reactor to control the conversion rate to 50%; the solution obtained by the reaction is injected into the vacuum devolatilizer, Under the conditions of 250° C. and 30 KPa, unreacted monomers were removed to obtain a low-yellowness styrene-acrylonitrile-maleic anhydride copolymer C. The unreacted monomer is cooled and recycled by the condenser.

[0028] Then 65 parts of polycarbonate (Lotte PC1001), 35 parts of ABS (Takahashi Petrochemical ABS8391), and 0.5 parts of copolymer C were extruded and granulated at 240-260°C to obtain PC / ABS alloy 3. In addition, 65 parts of polycarbonate (Lott...

Embodiment 2

[0030] Add 1 part of azobisisobutyronitrile, 0.1 part of dodecyl mercaptan, 15 parts of styrene, and 5 parts of acrylonitrile into the reactor, and stir evenly. The temperature of the reactor is 60 ° C, the pressure is 0.6 MPa, and 0.8 Parts of maleic anhydride are dissolved in remaining 47.2 parts of styrene, 28 parts of acrylonitrile, 4 parts of methyl acrylate, and the dissolved solution is dripped into the reactor to control the conversion rate to 40%; The unreacted monomer was removed under the conditions of 180°C and 4KPa to obtain low yellowness styrene-acrylonitrile-maleic anhydride copolymer D. The unreacted monomer is cooled and recycled by the condenser.

[0031] Then 65 parts of polycarbonate (Lotte PC1001), 35 parts of ABS (Takahashi Petrochemical ABS8391), and 3 parts of copolymer D were extruded and pelletized at 240-260°C to obtain PC / ABS alloy 5. Copolymer D and The performance data of Alloy 5 are shown in Table 1 and Table 2, respectively.

Embodiment 3

[0033] Add 0.3 parts of BPO, 1 part of dodecyl mercaptan, 9 parts of styrene, 3 parts of acrylonitrile, and 0.4 parts of tert-butyl trimethylhexanoate into the reactor, stir evenly, and the temperature of the reactor is 80°C. The pressure is 0.1MPa, dissolve 12 parts of maleic anhydride in the remaining 57 parts of styrene and 19 parts of acrylonitrile, drop the dissolved solution into the reactor, and control the conversion rate to 40%; inject the solution obtained by the reaction into a vacuum The devolatilizer removes unreacted monomers under the conditions of 250°C and 100KPa to obtain low yellowness styrene-acrylonitrile-maleic anhydride copolymer E. The unreacted monomer is cooled and recycled by the condenser.

[0034] Then 65 parts of polycarbonate (Lotte PC1001), 35 parts of ABS (Takahashi Petrochemical ABS8391), and 3 parts of copolymer E were extruded and pelletized at 240-260°C to obtain PC / ABS alloy 6. Copolymer E and The performance data of Alloy 6 are shown in ...

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Abstract

The invention discloses a low yellowness styrene-acrylonitrile-maleic anhydride copolymer and a preparation method thereof. The copolymer comprises the following components: 35-80 parts of styrene, 10-30 parts of acrylonitrile, 1-30 parts of maleic anhydride, and 1-20 parts of a fourth monomer. The bulk polymerization process is employed for production, and solves the problems of too yellow appearance, affected product appearance and the like in styrene-acrylonitrile-maleic anhydride copolymers produced by previous technologies. According to the invention, an oil-soluble initiator is employedto produce free radicals, and reaction is carried out under a low temperature condition so as to obtain the low yellowness terpolymer with low molecular weight distribution coefficient, the terpolymeris suitable for use as a compatibilizer of plastic alloys (PC/ABS, ABS/PET, PA/ABS, etc.), and does not affect the appearance of downstream modified products.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a low-yellowness styrene-acrylonitrile-maleic anhydride copolymer and a preparation method thereof. Background technique [0002] Styrene-acrylonitrile-maleic anhydride terpolymer not only has the characteristics of general-purpose plastic styrene-acrylonitrile (SAN), but also has the characteristics of high reactivity and heat resistance, and is suitable as polycarbonate, polyamide and ABS Compatibilizer for (styrene-acrylonitrile-butadiene) resin alloys. Compared with the common styrene-maleic anhydride binary copolymers on the market, the terpolymer has better compatibility with ABS or SAN, and is more suitable as a compatibilizer for ABS resin alloys, improving the interphase between the two phases of the alloy. Adhesion, improve the mechanical properties of the alloy. However, there are few studies on the synthesis of this terpolymer at present, and there are some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/44C08F222/06C08F220/18C08F220/14
CPCC08F212/08C08F220/44C08F222/06C08F220/1804C08F220/14
Inventor 李昌鸿朱延谭曾王杰田冶
Owner 嘉兴华雯化工股份有限公司
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