IMPROVED AMINO RESIN PERFORMANCE WITH SULFONATED LIGNIN

    公开(公告)号:US20230132358A2

    公开(公告)日:2023-04-27

    申请号:US17590466

    申请日:2022-02-01

    申请人: Arclin USA LLC

    摘要: A resin system and methods of making resin system wherein lignosulfonate is added to urea-formaldehyde and melamine-urea-formaldehyde adhesives. Lignosulfonate is added to the resins which improves the performance characteristics of the adhesive while reducing environmental impact by consuming byproducts from other industrial processes. The resin system includes a urea-formaldehyde (UF) resin or melamine-urea-formaldehyde (MUF), prepared in at least two stages wherein the UF resin or MUF resin has a molar ratio (MR) of total moles formaldehyde to total moles urea plus, if present, the one or more melamine compounds of from about 0.25:1 to about 2.50:1, and wherein one or more lignosulfonate compounds are included in an amount of from about 0.1-30 wt. %, based on a total weight of the resin system, and wherein the resin system has a buffer capacity of 2-400 mL of 0.1 N HCl by the ATV Method for a period of time of at least about 20 days at 25° C.

    PHENOLIC RESIN COMPOSITIONS AS BINDERS IN REFRACTORY ARTICLES

    公开(公告)号:US20230303821A1

    公开(公告)日:2023-09-28

    申请号:US17705786

    申请日:2022-03-28

    IPC分类号: C08L61/06 B22D41/02

    CPC分类号: C08L61/06 B22D41/02

    摘要: A liquid phenolic resin composition for use as a binder for a refractory article, the phenolic resin composition comprising a phenol formaldehyde resin, wherein the phenolic resin composition has a reduced vaporization percentage of phenolic compounds. The phenolic resin composition is used in refractory compositions comprising at least 50 wt. % of one or more refractory aggregate(s), based on a total weight of the refractory composition. There is also disclosed a refractory article, such as a brick, formed into a shape comprising said refractory composition and heating until the phenolic resin composition is at least 20% cured and having a green strength after curing at 170° C. for 5 hours sufficient for handling the solid without falling apart. Ladles for transporting and pouring molten metals can be made with an inner liner formed by stacking at least two bricks along the bottom and sides of a ladle shaped metal outer liner, and then heating the stacked bricks to a temperature sufficient to carbonize the resin thereby forming the inner liner of the ladle.

    AMINO RESIN PERFORMANCE WITH SULFONATED LIGNIN

    公开(公告)号:US20220242995A1

    公开(公告)日:2022-08-04

    申请号:US17590466

    申请日:2022-02-01

    申请人: Arclin USA LLC

    摘要: A resin system and methods of making resin system wherein lignosulfonate is added to urea-formaldehyde and melamine-urea-formaldehyde adhesives. Lignosulfonate is added to the resins which improves the performance characteristics of the adhesive while reducing environmental impact by consuming byproducts from other industrial processes. The resin system includes a urea-formaldehyde (UF) resin or melamine-urea-formaldehyde (MUF), prepared in at least two stages wherein the UF resin or MUF resin has a molar ratio (MR) of total moles formaldehyde to total moles urea plus, if present, the one or more melamine compounds of from about 0.25:1 to about 2.50:1, and wherein one or more lignosulfonate compounds are included in an amount of from about 0.1-30 wt. %, based on a total weight of the resin system, and wherein the resin system has a buffer capacity of 2-400 mL of 0.1 N HCl by the ATV Method for a period of time of at least about 20 days at 25° C.