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Polydiorganosiloxane polyurethane

An alkyl and oxygen-based technology, applied in the field of polydiorganosiloxane-polyurethane copolymers, can solve the problems of different solubility parameters, difficult to obtain reaction conditions, etc.

Inactive Publication Date: 2016-02-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since polydiorganosiloxanes (such as polydimethylsiloxane) and polyamides often have significantly different solubility parameters, it is difficult to obtain reaction conditions for the preparation of siloxane-based polyamides that lead to a high degree of polymerization, especially with Larger Polyorganosiloxane Segment Homolog Reaction

Method used

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  • Polydiorganosiloxane polyurethane
  • Polydiorganosiloxane polyurethane
  • Polydiorganosiloxane polyurethane

Examples

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example

[0152] Advantages and embodiments of this disclosure are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention. In these examples, all percentages, ratios and ratios are by weight unless otherwise indicated.

[0153] All materials are commercially available, eg, from Sigma-Aldrich Chemical Company (Milwaukee, WI), Germany, or are known to those of skill in the art unless otherwise stated or apparent.

[0154] These abbreviations are used in the following examples: g = gram, min = minute, mol = mole; ml = milliliter, L = liter, and wt = weight.

[0155] Material

[0156]

[0157]

[0158] Test Methods

[0159] The NMR spectrum of the sample was obtained using a nuclear magnetic resonance (NMR) spectrometer (MercuryPlus 600 spectrometer, Varian Inc., Palo Alto, CA) in which CDCl 3 as solvent and tetramet...

preparation example 1

[0162] Preparation Example 1 (PE1)

[0163] A 500 mL flask was charged with SD1 (26.03 g, 0.005 mol) and ethylene carbonate (0.934 g, 0.0105 mol) under nitrogen atmosphere. The solution was heated to 50°C for 4 hours to form the desired diol. The completion of the reaction was confirmed by NMR spectroscopy. The reaction is shown in the scheme below:

[0164]

preparation example 2

[0165] Preparation example 2 (PE2)

[0166] A solution of SD2 (1351.52 g, 0.04 mol) and ethylene carbonate (7.5 g, 0.084 mol) and 200 mL of THF was charged into a 5 L flask under nitrogen atmosphere. The solution was heated to 60°C for 3 days to form the desired diol. The completion of the reaction was confirmed by NMR spectroscopy.

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Abstract

Described herein is a polydiorganosiloxane polyurethane, linear, block copolymer and methods of making thereof. The copolymers comprise soft segments that are polydioranosiloxane units and hard segments which are polyurethane residues.

Description

technical field [0001] Polydiorganosiloxane-polyurethane copolymers, articles containing the copolymers, and methods of making the copolymers are described. Background technique [0002] Silicone polymers have unique properties derived primarily from the physical and chemical properties of the siloxane bond. These properties include low glass transition temperature, thermal and oxidative stability, resistance to ultraviolet radiation, low surface energy and hydrophobicity, high permeability to many gases, and biocompatibility. Typically, however, the silicone polymers lack tensile strength. [0003] The low tensile strength of silicone polymers can be improved by forming block copolymers. Some block copolymers contain "soft" silicone polymer blocks or segments and any number of "hard" blocks or segments. Polydiorganosiloxane-polyamide, polydiorganosiloxane-polyurea, and polydiorganosiloxane-polyoxamide are exemplary block copolymers. [0004] Polydiorganosiloxane-polyami...

Claims

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Application Information

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IPC IPC(8): C08G18/61C08G18/75C08G18/10C08G18/24C08G77/388
CPCC08G18/61C08G18/10C08G18/246C09D183/10C08G77/458Y10T428/31507Y10T428/31663C08G18/758C08G18/3206B32B27/08B32B27/283B32B2307/308B32B2307/71
Inventor 杨宇S·S·伊耶卢永上
Owner 3M INNOVATIVE PROPERTIES CO
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