Thermoplastic resin composition

A technology of resin composition and plasticity, which is applied in the field of resin composition, can solve the problems of affecting the gloss and impact resistance of the resin composition, the deterioration of the transparency of the resin composition, and the inability to mix uniformly, so as to achieve good impact resistance and durability. Excellent solvent resistance and high pencil hardness

Active Publication Date: 2012-07-04
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the surface hardness of the resin composition formed in this way can be effectively improved, the components in the resin composition cannot be mixed uniformly due to poor compatibility, thereby affecting the gloss and impact resistance of the resin composition sex
In addition, most of the existing technologies improve the impact resistance of the resin composition by adding rubber polymers. However, as the amount of rubber polymer added increases, the transparency of the resin composition will deteriorate.

Method used

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  • Thermoplastic resin composition
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Examples

Experimental program
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Embodiment

[0039] The present invention will be further described with reference to the following examples, but it should be understood that these examples are for illustrative purposes only and should not be construed as limitations on the practice of the present invention.

[0040]

[0041] 1. Polybutadiene: obtained by polymerizing butadiene monomer purchased from Formosa Plastics.

[0042] 2. Polymethyl methacrylate (referred to as PMMA): made by Chimei Industrial Co., Ltd.; the model is CM-207, and its weight average molecular weight (M w ) is 85,000.

[0043] 3. Methyl methacrylate-butadiene-styrene copolymer (abbreviated as MBS): manufactured by Kaneka; model number is M-511.

[0044]

[0045] 1. Twin-screw extruder: manufactured by Werner & Pfleiderer; model is ZSK-25.

[0046] 2. Injection molding machine: made by Chen Hsong; the model is SM-90.

[0047] Before describing the examples in detail, it should be noted that the polymer coagulant used below is prepared by the i...

preparation example 1

[0050] The preparation steps of this preparation example are as follows:

[0051] (1) earlier the 1,3-butadiene of 95 parts by weight, the vinyl cyanide of 5 parts by weight, the potassium persulfate solution of 15 parts by weight, the sodium pyrophosphate of 3 parts by weight, the potassium oleate of 1.5 parts by weight, 140 parts by weight of distilled water and 0.2 parts by weight of tert-dodecyl mercaptan were reacted at a reaction temperature of 65°C for 12 hours to obtain a rubber latex with a solid content of 40% and rubber particles with an average particle size of 0.1 μm.

[0052] (2) Using 3 parts by weight (dry weight) of a polymer coagulant to increase the particle size of rubber particles in 100 parts by weight (dry weight) of rubber latex to 0.3 μm to obtain a rubber latex with enlarged particles.

[0053] (3) 100 parts by weight (dry weight) of rubber latex with particle enlargement, 23.3 parts by weight of styrene, 10 parts by weight of vinyl cyanide, 1.2 parts...

preparation example 2 to 8

[0056] Preparation examples 2 to 8 are to prepare the ABS precursor in the same steps as preparation example 1, and the difference is only: the consumption of styrene and vinyl cyanide in the step (3) is different, so that the step (4) produces The content of vinyl cyanide monomer units in the obtained ABS precursors is also different, as shown in Table 1 below.

[0057] Table 1

[0058]

[0059] [Note] The content percentage of the above-mentioned vinyl cyanide monomer unit is based on the total weight of [styrene-based monomer unit] and [vinyl cyanide-based monomer unit] in the ABS precursor as 100wt%.

[0060] [Preparation of the thermoplastic resin composition of the present invention]

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Abstract

Provided is a thermoplastic resin composition, comprising 5-12wt% of a first stem grafting polymer, 16-30wt% of a first polymer, 55-70wt% of a second polymer and 4-8wt% of a second stem grafting polymer. The weight ratio between the second polymer and the first polymer is 1.8-4.1. The variety of the polymers and content of the first stem grafting polymer and cyanided ethylene monomer unit contained in the first polymer are defined in the description. The resin composition has high pencil hardness, good transparency, good impact resistance and good solvent resistance and wider application.

Description

technical field [0001] The present invention relates to a resin composition, in particular to a thermoplastic resin composition. Background technique [0002] Thermoplastic resins such as vinyl cyanide-styrene resin (abbreviated as AS resin), vinylcyanide-butadiene-styrene resin (abbreviated as ABS resin) and methyl methacrylate resin (abbreviated as PMMA) and other resins have been It is widely used in different fields, such as household appliances, mechanical parts, office supplies, electronic components, automobile industry and other fields. [0003] However, compared with other plastic products, products made of thermoplastic resins often have disadvantages such as low surface hardness and poor scratch resistance, thus limiting the application in some fields. Therefore, in the prior art, the surface of thermoplastic resin products is sprayed with a layer of protective film, or the surface is covered with non-woven fabrics to improve the scratch resistance of the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L33/08C08L55/02C08L25/12C08L51/04
Inventor 郭俊廷巫健仲苏文义
Owner CHI MEI CORP
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