Methods for making wet gels and dried gels therefrom

US9926401B2 · kind B2 · utility

Assignee

• Georgia-Pacific Chemicals LLC · US

Inventors

• Xing Dong · Decatur, US
• Shahid P. Qureshi · Duluth, US
• Christopher M. Lee · Kowloon, CN
• Kelly A. Shoemake · Atlanta, US
• Joseph Frank Ludvik · Midlothian, US

Key dates

• Filing date: Mar 17, 2017
• Grant date: Mar 27, 2018
• Expiry date: Mar 17, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2205/022
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Methods for making wet gels and dried gels therefrom are provided. The method for making a wet gel can include combining a hydroxybenzene compound, an aldehyde compound, and an additive to produce a reaction mixture. The additive can include a carboxylic acid, an anhydride, a homopolymer, a copolymer, or any mixture thereof. At least the hydroxybenzene compound and the aldehyde compound can be reacted to produce a wet gel. The reaction mixture can include about 10 wt % to about 65 wt % of the hydroxybenzene compound, about 5 wt % to about 25 wt % of the aldehyde compound, up to about 85 wt % of the carboxylic acid, up to about 40 wt % of the anhydride, up to about 40 wt % of the homopolymer, and up to about 40 wt % of the copolymer, where weight percent values are based on the combined weight of the hydroxybenzene compound, the aldehyde compound, and the additive.