公开(公告)号：US11453798B2

公开(公告)日：2022-09-27

申请号：US15100512

申请日：2013-12-05

Applicant: ECOSYNTHETIX LTD.

Inventor： Uttam Kumar Saha ,  Steven Bloembergen

IPC: C09D103/02 ,  B29B7/90 ,  B29B7/38 ,  D04H1/64 ,  C09J103/02 ,  D04H1/587 ,  C08B31/00 ,  C09D161/02 ,  B29B7/46

Abstract: This patent describes formaldehyde free or formaldehyde reduced binders useful, for example, in a fiber based composite material such as glass or other mineral fiber insulation, non-woven fabric or wood-based board. In one example, melamine is used as an acidic solution or a salt. The salt or solution is used to create an aqueous binder with other components such as a polyol and a crosslinker. A preferred polyol is a nanoparticle comprising high molecular weight starch. In other examples, binders include mixtures of a polyol with urea and a crosslinker. In other examples, a multi-component nanoparticle is made by reacting a polyol such as starch in an extruder with an insolubilizer such as melamine or urea. The resulting particles are mixed with water, optionally with other components such as an additional crosslinker, to create an aqueous binder.

公开(公告)号：US20150291857A1

公开(公告)日：2015-10-15

申请号：US14418313

申请日：2013-08-01

Applicant: ECOSYNTHETIX LTD.

Inventor： Uttam Kumar Saha

IPC: C09J103/02 ,  C03C25/32 ,  C03C25/28 ,  C09J129/04

CPC classification number: C09J103/02 ,  C03C25/28 ,  C03C25/321 ,  C08B31/003 ,  C08K5/21 ,  C08L2201/54 ,  C09D103/00 ,  C09D129/04 ,  C09D133/02 ,  C09J103/04 ,  C09J129/04

Abstract: A curable aqueous binder has two primary components. The first component is a bio-based material or mixture of bio-based materials such as starch or polyvinyl alcohol. The second component is one or more compounds selected from the group of urea, polyurea and substituted urea. The first and second components make up most (i.e. 50% or more) of all solids in the binder. The dry weight of the second component is preferably 25% or more of the dry weight of the first component. The solids content of the binder is preferably between 6 wt % and 20 wt %. A method of making a mineral fiber product includes a step of curing a binder as described above in situ on a mass of mineral fibers at a temperature of 175 degrees C. or more. A preferred binder is a mixture of urea and starch in a ratio by weight between 50-50 and 80-20 in water at a solids content of 10-20 wt %, substantially without other components, and may be used as a replacement for formaldehyde or petrochemical based resins. The starch is preferably cooked, thermoplastic or nanoparticle starch.

Abstract translation: 可固化水性粘合剂具有两个主要组分。 第一组分是生物基材料或生物基材料的混合物，例如淀粉或聚乙烯醇。 第二组分是一种或多种选自脲，聚脲和取代的脲的化合物。 第一和第二组分占粘合剂中所有固体的最多（即50％或更多）。 第二成分的干重优选为第一成分的干重的25重量％以上。 粘合剂的固体含量优选在6重量％至20重量％之间。 制备矿物纤维产品的方法包括如下步骤：在175℃或更高的温度下在大量矿物纤维上原位固化粘合剂。 优选的粘合剂是尿素和淀粉的混合物，其重量比在50-50至80-20之间，固体含量为10-20重量％，基本上不含其它组分，可用作甲醛的替代物 或石化基树脂。 淀粉优选是煮熟的，热塑性的或纳米颗粒淀粉。