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Polyurethane elastomer composition of ureido paraffin aggregates and preparation method thereof
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A polyurethane elastomer and polyurethane prepolymer technology, applied in the field of polyurethane elastomers, can solve problems such as use restrictions
Inactive Publication Date: 2019-09-17
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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Problems solved by technology
Some of the wax aggregates prepared by the existing wax non-flowing technology have changed the state of the wax, and some have increased the melting point of the wax, but in some special cases, their use is still limited
Method used
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Embodiment 1
[0064]Weigh 16g of hydroxyl-terminated polybutadiene HTPB and 8g of DOS, stir evenly at 85°C, add 1.5g of TDI, then add 1 drop of DBTL, stir evenly and react for 10min, add 6g of diureido paraffin aggregates ( The thickener content is 15%, paraffin: lubricating oil base oil is 7:3), continue to stir and react for 20 minutes, under the condition of vacuum degree of 10-500Pa, decompress and defoam for 1-5 minutes; then pour into the preheated The mold is heated to 60-110°C and solidified for 1-15 hours; finally, put it in a vacuum oven at 60°C, react for 5 days, take it out and cool it to room temperature to obtain the product.
Embodiment 2
[0066] Weigh 16g HTPB and 8g DOS, stir evenly at 85°C, add 1.5g TDI therein, stir evenly and react for 10min, add 6g diureido paraffin aggregates (thickener content 20% therein, paraffin: lubricating oil The base oil is 9:1), continue to stir and react for 20 minutes, and under the condition of vacuum degree of 10-500Pa, decompress and defoam for 1-5 minutes; then pour into the preheated mold and heat up to 60-110°C for 1-15 hours ; Finally, put it in a vacuum oven at 60°C, react for 7 days, take it out and cool it to room temperature to obtain the product.
Embodiment 3
[0068] Weigh 40g HTPB and 15g DOS, stir evenly at 85°C, add 2.3g MDI thereto, add 3 drops of 0.5% HAA solution, stir evenly and react for 10min, add 10g hexureidyl paraffin aggregates (thick Chemical agent content 15%, paraffin: lubricating oil base oil is 5:5), continue to stir reaction 20min, under the condition that vacuum degree is 10~500Pa, decompression defoaming 1~5min; Then pour into the preheated mold Raise the temperature to 60-110°C and solidify for 1-15 hours; finally, put it in a vacuum oven at 50°C, react for 10 days, take it out and cool it to room temperature to obtain the product.
[0069] The product performance that above-mentioned embodiment 1~3 obtains is as shown in table 1:
[0070] Table 1 is the product performance that embodiment 1~3 obtains
[0071] Example 1 Example 2 Example 3 color light yellow opaque light yellow opaque Cyan opaque elasticity good good good Uniformity uniform uniform uniform
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Abstract
The invention discloses a polyurethane elastomer composition of urea-based paraffin aggregate and a preparation method thereof. The polyurethane elastomer composition of the urea-based paraffin aggregate is prepared from, by mass, 20-135 parts of polyurethane prepolymer, 0.1-68 parts of curing agent, and 20-200 parts of urea based paraffin aggregates. The polyurethane elastomer composition of urea base paraffin aggregate can be prepared by mixing polyurethane prepolymer, curing agent, and urea-based paraffin aggregates, after defoaming, pouring and curing. The prepared polyurethane elastomer composition not only has the excellent properties of polyurethane elastomer, but also has important application value due to the added urea based paraffin aggregate which is an excellent phase change material.
Description
technical field [0001] The invention relates to the technical field of polyurethane elastomers, in particular to a polyurethane elastomer composition of urea-based paraffin wax aggregates and a preparation method thereof. Background technique [0002] Polyurethane elastomers have two segments, soft and hard, which can be molecularly designed to give them superior properties, such as high strength, high wear resistance, oil resistance, ozone resistance and good toughness. It has both the high elasticity of rubber and the rigidity of plastic, so its application fields are very wide, and it has changed from the original military use to military and civilian dual use. However, polyurethane elastomer is not perfect. One of its main disadvantages is large internal heat generation and general high temperature resistance. The normal operating temperature range is between -40 and 120°C. , then corresponding modification measures must be taken in structural design or formula. [000...
Claims
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Application Information
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