Bio-based binders for insulation and non-woven mats

摘要

An aqueous binder composition is provided that includes a carbohydrate and a crosslinking agent. In exemplary embodiments, the carbohydrate-based binder composition may also include a catalyst, a coupling agent, a process aid, a crosslinking density enhancer, an extender, a moisture resistant agent, a dedusting oil, a colorant, a corrosion inhibitor, a surfactant, a pH adjuster, and combinations thereof. The carbohydrate may be natural in origin and derived from renewable resources. Additionally, the carbohydrate polymer may have a dextrose equivalent (DE) number from 2 to 20. In at least one exemplary embodiment, the carbohydrate is a water-soluble polysaccharide such as dextrin or maltodextrin and the crosslinking agent is citric acid. Advantageously, the carbohydrates have a low viscosity and cure at moderate temperatures. The environmentally friendly, formaldehyde-free binder may be used in the formation of insulation materials and non-woven chopped strand mats. A method of making fibrous insulation products is also provided.

主权项

1. An aqueous binder composition for use in the formation of fiberglass insulation and non-woven mats comprising:
maltodextrin having a dextrose equivalent number from 9 to 14, said maltodextrin comprising from about 40% to about 95% by weight of total solids of said binder composition; and at least one crosslinking agent selected from monomeric polycarboxylic acid, citric acid, or their corresponding salts, said at least one crosslinking agent comprising from about 5% to about 40% of total solids of said binder composition, said at least one crosslinking agent having a molecular weight from about 90 to about 10,000.