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Synthesis method of polyether polyurethane elastomer

A technology of polyether polyurethane and synthesis method, which is applied in the direction of chemical/physical/physicochemical mobile reactors, etc., which can solve the problem of incomplete reaction, polyether polyurethane elastomer with many impurities, and uneven heating of raw materials etc. to achieve the effect that the reaction temperature is easy to control

Inactive Publication Date: 2020-11-24
唐朋飞
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies of the prior art and solve the problem of uneven heating of the raw materials prepared by the existing polyether polyurethane elastomer synthesis method, the raw materials are not fully mixed before the reaction, which often leads to an incomplete reaction, resulting in the resulting polyether Type polyurethane elastomer has more impurity, a kind of polyether type polyurethane elastomer synthetic method that the present invention proposes

Method used

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  • Synthesis method of polyether polyurethane elastomer
  • Synthesis method of polyether polyurethane elastomer
  • Synthesis method of polyether polyurethane elastomer

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preparation example Construction

[0036] Such as Figure 1 to Figure 8 Shown, a kind of polyether polyurethane elastomer synthetic method of the present invention, this method comprises the following steps:

[0037] S1: Add oligomer diols and antioxidants to the reaction device sequentially in a certain proportion, heat the reactants to 105-110°C for 1.5h, and then cool down to 30-40°C, that is Can complete the dehydration of oligomer diols;

[0038] S2: Add the dehydrated oligomer diol and isocyanate sequentially in proportion to the reaction device of S1. Under the action of the reaction device, the mixture formed by the dehydrated oligomer diol and isocyanate will be uniformly stirred, and the mixture It will be heated to 80-85°C by an oil bath to obtain a prepolymer;

[0039] S3: Control the reaction device to lower the temperature of the prepolymer to below 60°C, then add butanediol that has been heated to melt into the prepolymer, and fully stir the butanediol and the prepolymer evenly through the acti...

Embodiment approach

[0048] As a specific embodiment of the present invention, the side of the No. 1 chamber 15 close to the liquid outlet is an inclined plane, which is conducive to the outflow of the reaction product; when in use, after the reaction is basically completed, the reaction product will flow from the liquid outlet 113 after opening the liquid outlet 113 Outflow from the liquid outlet 113, because the No. 1 chamber 15 is located at the bottom of the cartridge core 11, so the reaction product easily flows down the slope of the No. 1 chamber 15, and flows into the liquid outlet 113 close to the No. 1 chamber 15 slope , and flow out of the reaction cylinder 1 along the liquid outlet 113.

[0049] As a specific embodiment of the present invention, the end of the stirring block 111 away from the side wall of the barrel core 11 is inclined downward, and the inclined surface of the stirring block 111 forms an included angle of 60 degrees with the horizontal plane, and the inclined stirring bl...

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Abstract

The invention belongs to the field of polyurethane elastomer preparation, and particularly relates to a synthesis method of polyether polyurethane elastomer, which comprises the following steps: S1, heating oligomer diol and an antioxidant in a reaction device to obtain dehydrated oligomer diol; S2, adding the dehydrated oligomer diol and isocyanate into the reaction device, stirring, and heatingin an oil bath to obtain a prepolymer; S3, controlling the reaction device to cool the prepolymer, then adding molten butanediol into the prepolymer, and fully stirring and heating to obtain a blockyproduct; and S4, putting the blocky product obtained in the S3 into a drying oven, and heating, curing and forming to obtain the polyether polyurethane elastomer; the raw materials are subjected to oil-bath heating through glycerol, so that the raw materials are uniformly heated; meanwhile, a cylinder core is driven by a motor to rotate, and stirring blocks are arranged on the inner surface of theside wall of the cylinder core, so that the raw materials are fully mixed, and finally, the relatively pure polyether polyurethane elastomer is obtained.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomer preparation, in particular to a synthesis method of polyether polyurethane elastomer. Background technique [0002] Polyurethane elastomer, also known as polyurethane elastomer, is a polymer synthetic material containing more carbamate groups in the main chain, generally composed of oligomer polyols such as polyether, polyester and polyolefin , and polyisocyanate and diol or diamine chain extender step by step addition polymerization; its structure can be described by "soft segment" and "hard segment", polyols such as polyether, polyester or polyolefin constitute the soft segment , Diisocyanate and chain extender constitute the hard segment. Due to the thermodynamic incompatibility between the soft segment and the hard segment, the soft segment and the hard segment can form independent microdomains through dispersion and aggregation, with a microphase separation structure. The soft segment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/48C08G18/32B01J19/28
CPCB01J19/28B01J2219/00076C08G18/10C08G18/4825C08G18/3206
Inventor 唐朋飞张跃
Owner 唐朋飞