Intumescent flame retardant polybutylene succinate and preparation method thereof

A polybutylene succinate, intumescent flame retardant technology, applied in the field of flame retardant materials, can solve the problems of high cost, complex process, difficult industrialized production, etc., and achieves low production cost, simple process, and pollution-free production. Effect

CN101781445AActive Publication Date: 2010-07-21UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-07-21

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Abstract

The invention discloses intumescent flame retardant polybutylene succinate and a preparation method thereof, which are characterized in that 80 to 85 percent of polybutylene succinate and 15 to 20 percent of intumescent flame retardant agent as well as 0 to 3 percent of synergist are added to an internal mixer to be cut, melt down and blended to obtain the product. Pictures of a high-resolution transmission electron microscope show that nano-grade dispersion is formed in the Polybutylene succinate basal body; the oxygen index reaches 40 and passes through the vertical burning test standard UL-94V0 grade; the initial thermal decomposition temperature is 321 DEG C, the maximum thermal decomposition temperature is 353 DEG C, and the residual quality score is 11.6 percent at the temperature of 700 DEG C; the pictures of the carbon layer shows that a compact intumescent carbon layer is formed, and a plurality of complete bubbles are formed. The intumescent flame retardant polybutylene succinate can be used for the foaming materials and the packing materials of the toy, household appliance, daily chemicals, food and medicines.
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Description

technical field

[0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to intumescent flame-retardant polybutylene succinate and a preparation method thereof. Background technique

[0002] According to Baidu Encyclopedia, polybutylene succinate (PBS), also known as polybutylene succinate or polybutylene succinate, contains ester bonds that are easily hydrolyzed in the main chain, and the main chain is soft. A semi-crystalline thermoplastic resin with complete biodegradability, with a melting point of 114°C and a crystallinity of 30-45% depending on the molecular weight and molecular weight distribution. The performance is between polyethylene and polypropylene, and it can be directly used as plastic processing. Polybutylene succinate has good processing performance, and can be processed on ordinary processing and molding equipment, and the processing temperature range is 140-260°C. It can be processed by injection moldin...

Examples

Embodiment 1

[0019] Firstly, the polybutylene succinate was dried at 65°C for 12 hours, the intumescent flame retardant was dried at 80°C for 12 hours, and the silica was dried at 70°C for 12 hours.

[0020] 40 grams of polybutylene succinate through the above-mentioned drying process are melted in a banbury mixer (the temperature is about 115 ° C), and then 8.31 grams of ammonium polyphosphate, 1.19 dicyandiamide and 0.5 gram of silicon dioxide are added, Melting and blending at a rotating speed of 30rmp for 10-15 minutes, the intumescent flame retardant and the synergist form nanoscale dispersion in the polybutylene succinate matrix, and the material is cut to obtain the intumescent flame-retardant polybutylene succinate of the present invention. Butylene glycol diacid.

[0021] By using a limiting oxygen index tester and a vertical combustion tester to test the intumescent flame-retardant polybutylene succinate sample prepared in this example, it can be known that the oxygen index of th...

Embodiment 2

[0025] Firstly, the polybutylene succinate was dried at 70°C for 8 hours, the intumescent flame retardant was dried at 80°C for 12 hours, and the silica was dried at 80°C for 12 hours.

[0026] Melt 42.5 grams of the above-mentioned dry-treated polybutylene succinate in an internal mixer (the temperature is about 115° C.), and then add 4.8 grams of a compound composed of melamine phosphate and ammonium polyphosphate in a mass ratio of 1:2. Compound, 1.2 grams of melamine and 1.5 grams of silicon dioxide were blended for 10-15 minutes at a rotating speed of 30rmp, and the intumescent flame retardant and synergist formed nanoscale dispersion in the polybutylene succinate matrix, and the following material, that is, to obtain intumescent flame-retardant polybutylene succinate.

[0027] By using a limiting oxygen index tester and a vertical combustion tester to test the intumescent flame-retardant polybutylene succinate sample prepared in this example, it can be known that the oxy...