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US 10,119,020 B2Granted
Modified urea-formaldehyde binders for non-woven fiber glass mats
AssigneeJohns Manville
InventorsGuodong Zheng, Mingfu Zhang, Luke Saylor Weith, Jawed Asrar
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Abstract
Urea-formaldehyde (UF) resin binder compositions modified with a starch are described. The binder compositions may include about 1 wt. % to about 10 wt. % of a starch. In addition, fiber reinforced composites are described. The composites may include organic or inorganic fibers and a polymer matrix formed from a binder composition. The binder composition may include a UF resin and about 1 wt. % to about 10 wt. % of a starch.
Claims19
A binder composition comprising:
- a urea-formaldehyde resin;
- about 1 wt. % to about 10 wt. % of a starch crosslinking agent selected from the group consisting of a native starch, a cationically modified starch, and an anionically modified starch, wherein hydroxyl functional groups on the starch bond to reactive functional groups on the urea-formaldehyde resin;
- and
- wherein the binder composition lacks a styrene-containing, petroleum-based modifier,
- wherein the urea-formaldehyde resin and the starch crosslink to increase a hot/wet tensile strength of a fiber-reinforced composite formed with the binder composition by 5% to 35% compared to a comparative fiber-reinforced composite made with an unmodified urea-formaldehyde binder composition that lacks the starch.
2 more elements
A fiber reinforced composite comprising:
- a polymer matrix formed from a binder composition that comprises:
- a urea-formaldehyde resin;
- about 1 wt. % to about 10 wt. % of a starch crosslinking agent selected from the group consisting of a native starch, a cationically modified starch, and an anionically modified starch, wherein hydroxyl functional groups on the starch bond to reactive functional groups on the urea-formaldehyde resin;
- and
- wherein the binder composition lacks a styrene-containing, petroleum-based modifier,
- organic or inorganic fibers,
- wherein the urea-formaldehyde resin and the starch are crosslinked to increase a hot/wet tensile strength of the fiber-reinforced composite by 5% to 35% compared to a comparative fiber-reinforced composite made with an unmodified urea-formaldehyde binder composition that lacks the starch.
4 more elements
A binder composition consisting of:
- a urea-formaldehyde resin;
- and
- about 1 wt. % to about 10 wt. % of a starch crosslinking agent selected from a native starch, a cationically modified starch, and an anionically modified starch wherein the starch does not substantially increase a viscosity of the binder composition, and wherein the binder composition lacks a styrene-containing, petroleum-based modifier, and
- wherein the urea-formaldehyde resin and the starch crosslink to increase a hot/wet tensile strength of a fiber-reinforced composite formed with the binder composition by 5% to 35% compared to a comparative fiber-reinforced composite made with an unmodified urea-formaldehyde binder composition that lacks the starch.
1 more element
Dependencies are inferred from the claim text.