Hyperbranched organosilicon foam stabilizer and its preparation method and application

A foam stabilizer and organosilicon technology, which is applied in the field of hyperbranched silicone foam stabilizer and its preparation, and achieves the effects of good compatibility, wide density and practicability, excellent and stable foam stabilization and emulsification and foam stabilization effects.

Active Publication Date: 2022-05-27
JIANGSU MAYSTA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far there is no relevant report on hyperbranched polyether modified silicone oil used as a foam stabilizer

Method used

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  • Hyperbranched organosilicon foam stabilizer and its preparation method and application
  • Hyperbranched organosilicon foam stabilizer and its preparation method and application
  • Hyperbranched organosilicon foam stabilizer and its preparation method and application

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preparation example Construction

[0051] The preparation method of the hyperbranched organosilicon foam stabilizer provided in the embodiment of the present invention comprises:

[0052] The alkoxy-terminated hyperbranched polysiloxane is reacted with a hydroxyl-terminated polyether to obtain a hyperbranched organosilicon foam stabilizer. The structural formula of the polysiloxane segment of the alkoxy-terminated hyperbranched polysiloxane for [(CH 3 ) 2 SiO] m [CH 3 C 6 H 5 SiO] n [CH 3 CH 2 CH 2 CF 3 SiO] P , where m, n and p are all integers, and m=8-40, n=0-12, p=0-6, 0≤(n+p) / (m+n+p)≤0.25, 0≤ p / (m+n+p)≤0.1.

[0053] The hyperbranched organosilicon foam stabilizer prepared by the method provided by the invention has controllable molecular structure of the hyperbranched segment, adjustable molecules, and high degree of polymerization; the foam stabilizer has good compatibility with the polyurethane matrix; It has excellent emulsification and foam stabilization effects, and can meet the requireme...

Embodiment 1

[0082] (1) Adopt "quasi one-step method", take 8.94g dimethylolpropionic acid as monomer, 2.98g trimethylolpropane as central nucleus, 0.04g p-toluenesulfonic acid as catalyst, under nitrogen protection, stir, Heated to 140°C for 0.5h reaction, then stopped nitrogen filling, decompressed to 400MPa and reacted for 2h, then added 17.88g dimethylolpropionic acid and 0.09g p-toluenesulfonic acid, reacted at 140°C for 0.5h under nitrogen protection, and then The pressure was reduced to 400-500MPa and reacted for 2h, cooled to room temperature, and the product was dissolved in acetone, then precipitated with n-hexane, filtered and vacuum-dried at 80°C / 400MPa for 24h to obtain 27.416g (yield 92.0%) of hydroxyl end Aliphatic hyperbranched polyester G2-HBPE;

[0083] (2) under nitrogen protection, put the obtained hydroxyl-terminated hyperbranched polyester G2-HBPE 3.14g into a three-necked flask, add 20.2ml (1.6mol / L) of n-hexane solution of tert-butyllithium under nitrogen atmosphere...

Embodiment 2

[0087] (1) Adopt "quasi one-step method", take 8.94g dimethylolpropionic acid as monomer, 2.98g trimethylolpropane as central nucleus, 0.04g p-toluenesulfonic acid as catalyst, under nitrogen protection, stir, Heated to 140℃ for 0.5h, then stopped nitrogen filling, decompressed to 500MPa and reacted for 2h, then added 17.88g dimethylolpropionic acid and 0.09g p-toluenesulfonic acid, under nitrogen protection, reacted at 140℃ for 0.5h, then The pressure was reduced to 400-500MPa and reacted for 2h, cooled to room temperature, and the product was dissolved in acetone, then precipitated with n-hexane, filtered and vacuum-dried at 80°C / 500MPa for 24h to obtain 27.416g (yield 92.0%) of hydroxyl end Aliphatic hyperbranched polyester G2-HBPE;

[0088] (2) under nitrogen protection, put the obtained hydroxyl-terminated hyperbranched polyester G2-HBPE 3.14g into a three-necked flask, add 22.2ml (1.6mol / L) n-hexane solution of n-butyllithium under nitrogen atmosphere, Aging at 90°C for...

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Abstract

The invention discloses a hyperbranched organosilicon foam stabilizer and its preparation method and application, and relates to the technical field of foam stabilizer preparation. The preparation method of a hyperbranched organosilicon foam stabilizer comprises: alkoxy-terminated hyperbranched polysiloxane Alkane reacts with a hydroxyl-terminated polyether to obtain a hyperbranched organosilicon foam stabilizer, and the structural formula of the polysiloxane segment of the alkoxy-terminated hyperbranched polysiloxane is [(CH 3 ) 2 SiO] m [CH 3 C 6 h 5 SiO] n [CH 3 CH 2 CH 2 CF 3 SiO] P , where m, n and p are all integers, and m=8‑50, n=0‑12, p=0‑6, 0≤(n+p) / (m+n+p)≤0.25, 0≤ p / (m+n+p)≤0.1. The hyperbranched organosilicon foam stabilizer is prepared by the above method. The foam stabilizer has a high degree of polymerization, the molecular structure of the hyperbranched chain segment is controllable, and the molecule is adjustable. It is especially suitable for the slow rebound foam system formulation.

Description

technical field [0001] The invention relates to the technical field of preparation of a foam stabilizer, in particular to a hyperbranched organosilicon foam stabilizer and a preparation method and application thereof. Background technique [0002] Foam stabilizer is a kind of polyether modified silicone oil. It is a very important auxiliary agent for polyurethane foaming materials. Its main functions include ensuring the smooth progress of various reactions in the polyurethane foaming process, supporting the foam itself, and avoiding foam collapse and porosity. The occurrence of undesirable phenomena such as roughness and foam cracking. With the rapid development of my country's polyurethane technology, foam stabilizers, as one of the indispensable key components in the polyurethane industry, have broad market prospects. [0003] The polyether-modified silicone oil used as a foam stabilizer is composed of a hydrophilic polyether segment and a hydrophobic polysiloxane segmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/46C08G63/06C08G77/04C08G77/24C08G77/445C08G101/00
CPCC08G77/46C08G63/06C08G77/04C08G77/24C08G77/445C08G2110/0008
Inventor 孙宇杨雄才李丰富
Owner JIANGSU MAYSTA CHEM
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