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High-tenacity unsaturated polyester resin suitable for centrifugal casting and preparation method thereof

A polyester resin and centrifugal casting technology, which is applied in the field of unsaturated polyester resin, can solve the problems such as unsuitable centrifugal casting process, and achieve the effect of strong crystallinity, easy operation, mechanical properties and flexibility

Inactive Publication Date: 2009-12-30
CHANGZHOU HUARUN COMPOSITE MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, glass fiber reinforced resin is not suitable for centrifugal casting process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare high-toughness unsaturated polyester resin suitable for centrifugal casting by the weight of the following raw materials: 405Kg of triethylene glycol, 562Kg of diethylene glycol, 332Kg of terephthalic acid, 230Kg of sebacic acid, 522Kg of fumaric acid, 680Kg of styrene, methyl acrylate Esters 102Kg.

[0018] The specific method is as follows:

[0019] ①. Put 405Kg of triethylene glycol, 562Kg of diethylene glycol, 332Kg of terephthalic acid and 230Kg of sebacic acid into the reactor in turn and heat up to 200-220°C for reaction. The temperature of the distillation head is controlled at 100-103°C. When the solid acid value is lower than 50mgKOH / g, cool down to below 160°C;

[0020] ②, then add 522Kg of fumaric acid to continue the reaction, the reaction temperature is 200-210°C, the distillation head temperature is 100-103°C, the reaction end point is: viscosity 0.55-0.65Pa.s (25°C), acid value 10-15mgKOH / g (testing ratio: 2: 1), be cooled to 180 ℃ and add pol...

Embodiment 2-6

[0023] According to the preparation method described in Example 1, the high-toughness unsaturated polyester resin suitable for centrifugal casting is prepared, and the specific consumption (Kg) of raw materials is shown in Table 1.

[0024] The unsaturated polyester resin prepared in Examples 1-6 was applied to wood products and its various indexes were measured, as shown in Table 1.

[0025] Table 1

[0026] Example

[0027] Tensile strength MPa

[0028] The indicators and detection basis of each parameter in Table 1 are shown in Table 2.

[0029] Table 2

[0030] project

[0031] Anti-crack performance of products

[0032] As can be seen from Table 1, the high-toughness unsaturated polyester resin suitable for centrifugal casting prepared according to the formula of Comparative Example 1 has better flexibility of the product, no cracking phenomenon of the product, and better anti-breaking performance, and is suitable for centrifuga...

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Abstract

The invention relates to an unsaturated polyester resin, in particular to a high-tenacity unsaturated polyester resin suitable for centrifugal casting. The invention is prepared by dissolving a reaction product of a condensation reaction of triethylene glycol, diethylene glycol, terephthalic acid, decanedioic acid and boletic acid into styrene and methyl acrylate after the condensation reaction is completed. The invention has the advantages that: (1) the resin is suitable for the centrifugal casting molding process; the flexibility and the anti-breaking property of the products of the resin is also enhanced; and the resin is especially suitable for a model formed by centrifugal casting, and the model can be formed by molding in one step and has both favorable mechanical properties and flexibility; (2) the triethylene glycol and the decanedioic acid are adopted as main raw materials for enhancing the flexibility of the resin, thereby enhancing the flexibility of the resin without affecting the mechanical properties and the chemical properties of the resin; and (3) stability of the product is good, and the process is simple and is easy to operate and control.

Description

1. Technical field [0001] The invention relates to an unsaturated polyester resin, in particular to a high-toughness unsaturated polyester resin suitable for centrifugal casting. 2. Background technology [0002] At present, there are many manufacturers producing mannequins in China. According to incomplete statistics, there are hundreds of enterprises in Jiangsu Province alone. The main raw material for the production of mannequins is traditional fiberglass resin, which is hand-laid-up. This process requires a large number of molds to be prefabricated. By making FRP models on the molds that have been prepared, the labor load is relatively large, and the styrene in the resin volatilizes, resulting in a relatively harsh operating environment. How to improve and improve the molding process of models, improve the operating environment, and reduce labor costs has become a serious problem that countless model manufacturers need to face. [0003] In recent years, manufacturers o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08G63/676
Inventor 包柏青曹建兴刘世仓
Owner CHANGZHOU HUARUN COMPOSITE MATERIALS
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