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Method for preparing thermoplastic resin having excellent color matching property, resident gloss and weather resistance

A thermoplastic resin, weather resistance technology, applied in the field of thermoplastic resin preparation, can solve the problems of long reaction time, limited impact resistance, complicated methods, etc.

Inactive Publication Date: 2002-12-04
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the method is complicated and the reaction time is long, which makes the method uneconomical
In addition, although US 4831079 discloses the use of PMMA resin with excellent color matching properties, this method is not economical because expensive PMMA is used, and it is limited in improving impact resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A) Preparation of Core Latex

[0025] 1) First polymerization step

[0026] The following ingredients were charged into a polymerization reactor under a nitrogen atmosphere and the temperature was raised to 70° C., and then allowed to react for 1 hour.

[0027] 70 parts by weight of ion-exchanged water

[0028] Butyl acrylate 2 parts by weight

[0029] Ethylene glycol dimethacrylate (EDMA) 0.02 parts by weight

[0030] Sodium bicarbonate 0.1 parts by weight

[0031] Potassium persulfate (KPS) 0.04 parts by weight

[0032] 2) Second polymerization step

[0033] All the following ingredients except potassium persulfate were mixed in a polymerization reactor, and then the product of the first polymerization step and the catalyst were continuously added thereto at 70°C over a period of 4 hours to conduct polymerization.

[0034] 45 parts by weight of ion-exchanged water

[0035] Dioctyl sodium sulfosuccinate 0.5 parts by weight

[0036] 38 parts by weight of butyl a...

Embodiment 2

[0066] An ASA resin was prepared and its properties were measured in the same manner as in Example 1, except that the amounts of styrene and methyl methacrylate used in B) were changed to 32 parts by weight and 5 parts by weight, respectively. As a result of analysis of the resin, the graft ratio was 48% and the particle diameter was 4450 Å. Moreover, its related properties are 20 for impact resistance, 4 for color matching, and 86 for gloss retention.

Embodiment 3

[0068] ASA resin was prepared and its properties were measured in the same manner as in Example 1, except that EDMA in A) was replaced with TAIC. As a result of analysis of the resin, the graft ratio was 43%, and the particle diameter was about 4400 Å. The relevant properties are 18 for impact resistance, 5 for color matching, and 85 for gloss retention.

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PUM

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Abstract

The invention relates to a preparation method of a weather-resistant thermoplastic resin with excellent color matching and resident gloss. The method of the present invention comprises the following steps: a) using an alkyl acrylate monomer and an aryl vinyl monomer having a large refractive index to prepare a core latex, and b) using an oil-soluble initiator to graft the aryl vinyl monomer, Vinyl cyanide monomer and alkyl methacrylate monomer.

Description

Background of the invention [0001] (a) Field of Invention [0002] The present invention relates to a method for preparing a thermoplastic resin, and more particularly to a method for preparing a weather-resistant thermoplastic resin having excellent color matching and resident gloss. [0003] (b) Description of prior art [0004] Generally, ASA resin, a terpolymer composed of acrylate-styrene-acrylonitrile, is prepared by grafting styrene and acrylonitrile compounds into acrylate rubber, and is often used in outdoor electronic parts , building materials and sporting goods because of its good properties, including weather resistance, chemical resistance, processability, etc. However, the use of ASA resins in materials that require colors such as red, yellow, green, etc., is limited because during its preparation, styrene and acrylonitrile compounds cannot be grafted sufficiently into acrylate rubbers and expose the Acrylic rubber, so its color matching and dwell gloss are p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/34C08F265/04C08F265/06
CPCC08F265/04C08F265/06C08F2/22C08F291/00
Inventor 辛亮铉俞根勋安泰彬李灿弘
Owner LG CHEM LTD