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Polyurea compositions and methods of use

A composition and prepolymer technology, applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesive types, etc.

Active Publication Date: 2020-05-05
PRC DE SOTO INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, sealants made using multifunctional polythioethers exhibit good fuel resistance, hardness, and flexibility, but often have compromised elongation

Method used

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  • Polyurea compositions and methods of use
  • Polyurea compositions and methods of use
  • Polyurea compositions and methods of use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0274] Polyoxymethylene polyol

[0275] Thiodiethylene glycol (1833g), p-formaldehyde (95% purity) (360g), AMBERLYST TM 15 (319 g, obtained from Dow Chemical Company) and toluene (1000 mL) were charged to a 5 L 4 neck round bottom flask. The flask was equipped with a heating mantle, thermocouple, temperature controller and fitted with a reflux condenser, dropping funnel and a Dean-Stark adapter for nitrogen positive pressure inlet. The reaction was stirred under nitrogen, heated to 118 °C and held at 118 °C for approximately 7 h. During this period, the collected water was periodically removed from the Dean-Stark adapter. The reaction mixture was then cooled to room temperature and filtered through a coarse fused Buchner funnel (600 mL volume) with 9.0 cm diameter Whatman GF / A filter paper on the frit. The flask and filter cake were washed with 500 mL of toluene. Obtain filtrate. The filtrate was then vacuum dried using a 2L round bottom flask (rotary evaporator, 7 torr...

Embodiment 2

[0277] h 12 MDI-terminated polyoxymethylene-isocyanate prepolymer

[0278] The thiodiethylene glycol polyformal polyol (450 g) of Example 1 was charged into a 1000 mL 4-neck round bottom flask. The flask was equipped with a heating mantle, thermocouple, temperature controller, inlet to provide a positive pressure of nitrogen and a mechanical stirrer (PTFE paddle and bearing). The polyoxymethylene polyol was stirred and heated to 76.6°C (170°F) at about 200rpm, then added W(H 12 MDI) (99.5 g) and a solution of 0.01% dibutyltin dilaurate dissolved in methyl ethyl ketone (5.50 g). The reaction mixture was maintained at 76.6 °C for 7 h and then cooled to room temperature. A solution of 1% benzyl chloride dissolved in methyl ethyl ketone (5.50 g) was then added to the reaction mixture. The resulting thiodiethylene glycol polyformal-isocyanate prepolymer had an isocyanate content of 3.73% and a viscosity of 356 poise.

Embodiment 3

[0280] HDI-uretdione terminated polyoxymethylene-isocyanate prepolymer

[0281] The thiodiethylene glycol polyformal polyol (101 g) of Example 1 was charged into a 500 mL 4-neck round bottom flask. The flask was equipped with a heating mantle, thermocouple, temperature controller, inlet to provide a positive pressure of nitrogen and a mechanical stirrer (PTFE paddle and bearing). The polyoxymethylene polyol was stirred and heated to 76.6°C (170°F) at about 200rpm, then added XP-2730 (HDI-uretdione aliphatic polyisocyanate) (33.4 g) and a solution of 0.01% dibutyltin dilaurate dissolved in methyl ethyl ketone (1.4 g). The reaction mixture was maintained at 76.6 °C for 7 h and then cooled to room temperature. A solution of 1% benzyl chloride dissolved in methyl ethyl ketone (1.4 g) was then added to the reaction mixture. The resulting prepolymer had an isocyanate content of 3.41% and a viscosity of 695 poise.

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Abstract

The present invention relates to a process for the preparation of alkylstyrene / isoolefin polymers. The method includes first providing a feed stream into a reactor. Various feed streams provide the monomer, polar diluent or polar diluent mixture and catalyst system entering the reactor. In the reactor, the feed streams contact each other such that the monomers form polymer in a stable slurry, wherein the amount of polymer in the slurry results in a slurry concentration of greater than 22 wt%. The ratio of moles of polymer formed per mole of initiator is in the range of 0.25-4.0 moles of polymer per mole of initiator.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Application No. 14 / 184,772, filed February 20, 2014, which is now granted and is a continuation-in-part of U.S. Application No. 13 / 934,286, filed July 3, 2013 , the 286' application is authorized as U.S. Patent No. 8,729,193 and is a continuation of U.S. Application No. 13 / 051,002 filed on March 18, 2011, and the 002' application is authorized as U.S. Patent No. 8,507,617, all of which are cited above incorporated into this application. technical field [0003] The present disclosure relates to polyurea compositions and methods of using the polyurea compositions. Background technique [0004] It is known that mercaptan-terminated sulfur-containing polymers are well suited for different applications such as aerospace sealant compositions, mainly due to their fuel resistance. Other desirable properties of aerospace sealant compositions include low temperature flexibil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/52C08G18/56C08G18/75C08G18/79C08G4/00C08G18/18C09J175/02C09K3/10
CPCC08G4/00C08G18/10C08G18/1858C08G18/52C08G18/56C08G18/755C08G18/758C08G18/798C09J175/02C09K3/1006C08G2190/00C09K2200/0665C08G18/324C08G18/3868C08G18/72C08G75/02C09J175/04C09J181/02
Inventor N·斯瑞瓦特桑A·雷耶斯S·马尼恩蔡觉晓M·伊藤林仁和
Owner PRC DE SOTO INT INC
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