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Organic silicon modified polyurethane gap-filling rubber for cement road

A technology of silicone and polyurethane, which is applied in polyurea/polyurethane adhesives, roads, roads, etc., can solve the problems of polyurethane gap fillers such as poor weather resistance, poor embedding resistance, and poor oil resistance, and achieve superior cost performance and overcome mechanical problems. The effect of poor performance and good low temperature flexibility

Inactive Publication Date: 2005-05-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above technologies, the present invention provides a cement pavement joint sealant made by modifying the molecular structure of polyurethane with organic silicon, which not only overcomes the shortcomings of polyurethane joint sealant, such as poor weather resistance and short service life, but also overcomes the shortcomings of polyurethane joint sealant. Disadvantages of poor embedding resistance, poor oil resistance and high price of silicone gap filler

Method used

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  • Organic silicon modified polyurethane gap-filling rubber for cement road
  • Organic silicon modified polyurethane gap-filling rubber for cement road

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) 110g molecular weight is the polyoxypropylene diol of 2000 hydroxyl value 54-58mgKOH / g, 130g molecular weight is 3050, the polyoxypropylene triol of hydroxyl value 54.5-57.5, 0.5g benzoyl chloride and 72g degree of polymerization Add 5-7 hydroxyl-terminated polydimethylsiloxane into a dry and clean reactor.

[0038] (2) Under the vacuum degree of about -0.086MP, turn on the stirring and turn on the condensed water of the condenser. Maintain the material temperature at about 90°C and dehydrate for 2 hours. When almost no water comes out from the condenser, close the intake valve and cool down to 60°C.

[0039] (3) Add 56g TDI for pre-polymerization reaction, under stirring, control the temperature in the reactor at 40-60°C, slowly add TDI, be sure to strictly control the temperature when adding TDI, and never exceed 70°C (a lot of heat will be generated after adding , pay attention to control the intake switch, and strictly control the temperature. Otherwise, the t...

Embodiment 2

[0043] (1) 150g molecular weight is the polyoxypropylene diol of 4000 hydroxyl value 26-30mgKOH / g, 120g molecular weight is the polyoxypropylene triol of 3000 hydroxyl value 54-58mgKOH / g, 0.5g benzoyl chloride and 30g polymerization The hydroxyl-terminated polydimethylsiloxane with a degree of 8-10 is added to the previously dried and cleaned reactor.

[0044] (2) Under the vacuum degree of about -0.086MP, turn on the stirring and turn on the condensed water of the condenser. Maintain the material temperature at about 90°C and dehydrate for 2 hours. When almost no water comes out from the condenser, close the intake valve and cool down to 60°C.

[0045] (3) Add 90g of MDI to carry out prepolymerization reaction. Under stirring, control the temperature in the reactor at 40-60°C, and slowly add MDI. When adding MDI, be sure to strictly control the temperature and never exceed 70°C. While stirring for 30 minutes, slowly raise the temperature to 80-82° C., maintain this temperat...

Embodiment 3

[0049] (1) 61g molecular weight is the polyoxypropylene diol of 1000 hydroxyl value 105-117mgKOH / g, 110g molecular weight is the polyoxypropylene triol of 3050 hydroxyl value 51, 0.5g benzoyl chloride and 48g degree of polymerization is 11- 13 hydroxy-terminated polydimethylsiloxane was added to the dry and clean reactor.

[0050] (2) Under the vacuum degree of about -0.086MP, turn on the stirring and turn on the condensed water of the condenser. Maintain the material temperature at about 90°C and dehydrate for 2 hours. When almost no water comes out from the condenser, close the intake valve and cool down to 60°C.

[0051] (3) Add 60g of PAPI for pre-polymerization reaction, under stirring, control the temperature in the reactor at 40-60°C, slowly add PAPI, be sure to strictly control the temperature when adding PAPI, and never exceed 70°C. While stirring for 30 minutes, slowly raise the temperature to 80-82° C., maintain this temperature range, and conduct polymerization u...

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Abstract

The organosilicon modified polyurethane gap-filling rubber for cement road consists of component A and component B in the ratio of 1 to 1-2. The component A is organosilicon modified polyurethane pre-polymer prepared with polyether polyol, hydroxy-terminated organosilicon, isocyanate and catalyst through copolymerization. The component B is prepared with active hydrogen compound, catalyst and stuffing and through mixing. The present invention has high elasticity, high coherence, antiageing property, fatigue resistance and moderate performance / cost ratio.

Description

(1) Technical field [0001] The invention relates to a cement pavement caulking glue, in particular to a silicone-modified polyurethane caulking glue with good aging resistance for the cement pavement. (2) Background technology [0002] Practice has proved that the quality of the cement pavement joint filling material is an important factor to ensure the long-term normal use of the concrete pavement. A good caulking material can play a watertight and airtight role, and has elasticity, cohesiveness, good durability, weather resistance, and can withstand repeated stretching and compression at the joint without being damaged. To long-term protection of cement pavement joints from damage. [0003] Polyurethane caulking materials are polymerized by the reaction of active hydrogen compounds and isocyanates, and are divided into one-component and two-component. Polyurethane molecular chain is a block copolymer combining soft segment and rigid segment. The molecular structure of t...

Claims

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Application Information

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IPC IPC(8): C09J175/08E01C11/12
Inventor 寿崇琦张志良邢希学解竹伯黄博生王泽华康杰芬
Owner UNIV OF JINAN
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