Method for preparing novel foaming thermoplastic polyurethane elastomer material

A technology of plastic polyurethane and elastomer materials, which is applied in the field of preparation of foamed thermoplastic polyurethane elastomer materials, can solve the problems affecting the yield, shrinkage of molded products, and lower density of molded products, and achieve low production cost, pollution-free process, The effect of solving material application problems

CN103183805AInactive Publication Date: 2013-07-03BEIJING ZHONGNENG JIANGLONG TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-07-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a novel foaming thermoplastic polyurethane (F-TPU) elastomer material. The material is a microporous polyurethane foaming material produced by a polymer polymerization reaction of a polyester polyol and isocyanate under the action of a catalyst and various additives. The method comprises the following steps: introducing a component A respectively through a measuring tank into a feed end of a first single screw extruder for a prepolymerization reaction, wherein the component A comprises the polyester polyol, a crosslinking agent and isocyanate; adding a component B to a discharge end of the first single screw extruder and introducing the component B and the component A after reaction into a feed end of a second screw extruder; and performing a polymerization reaction for the component A and the component B under the extruding of the second screw extruder, and extruding the material from a discharge end of the second screw extruder after reacting sufficiently. According to the method of the present invention, the density of the prepared TPU material is decreased to 500 kg / m3 or less, the TPU material is uniform in foaming and the method has the advantages of no pollution and simple process.
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Description

technical field

[0001] The invention relates to the technical field of organic polymer chemical industry, in particular to a preparation method of a foamed thermoplastic polyurethane elastomer material (new F-TPU material). Background technique

[0002] TPU is the abbreviation of Thermoplastic Urethane. The Chinese name is thermoplastic polyurethane elastomer. TPU is a polymer formed by the reaction and polymerization of diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), macromolecular polyol and chain extender. Material.

[0003] At present, the production process of TPU in the market is complicated and the production cost is high. During the preparation process, toxic gases and liquids will be produced, which will pollute the environment and cause harm to the health of on-site workers. When the TPU foam material is foamed outside the mold, the bridging degree is linearly related to the melt viscosity of the colloid. If the foaming is too early than the vulcan...

Examples

Embodiment Construction

[0022] see figure 1 , figure 1 is a flow chart of the first embodiment of the preparation method of the novel foamed thermoplastic polyurethane elastomer material (novel F-TPU material) of the present invention. Its preparation method comprises the following steps:

[0023] Step S21, introducing component A into the feeding end of the first single-screw extruder through a metering tank for prepolymerization, component A including polyester polyol, crosslinking agent and isocyanate;

[0024] Step S22, adding B component at the discharge end of the first single-screw extruder and introducing the reacted A component into the feed end of the second screw extruder, wherein B component includes: catalyst, foaming aid agent, water, surfactant, triisocyanate, sulfur-assisting agent and foaming agent;

[0025] Step S23, under the extrusion of the second screw extruder, component A and component B polymerize and react, and extrude from the discharge end of the second screw extruder a...