Curatives

Patent metadata

Field	Value
Publication number	US-11879052-B2
Application number	US-202017603209-A
Country	US
Kind code	B2
Filing date	Apr 17, 2020
Priority date	Apr 24, 2019
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

The host compound in a clathrate is an amino or hydroxyl containing aromatic phosphorous compound, clathrates containing a resin curative and their use in curable resin compositions to produce moulded articles particularly fibre reinforced articles.

First claim

The invention claimed is:

1. A clathrate comprising a host compound and a guest compound in which the host compound is selected from compounds of general formula

wherein X, X 1 , X 2 and X 3 are independently selected from S or O and at least one of Y 1 and Y 2 is present; and wherein when both Y 1 and Y 2 are present they may be the same or different and are selected from NHR or OH where R is selected from H or a hydrocarbyl group, and wherein;
the guest compound comprises at least one compound selected from the group consisting of

in which R 1 represents a hydrogen atom, a C 1 -C 10 alkyl group, an aryl group, an arylalkyl group, or a cyanoethyl group, and R 2 to R 4 each independently represent a hydrogen atom, a nitro group, a halogen atom, a C 1 -C 20 alkyl group, a C 1 -C 20 alkyl group substituted with a hydroxy group, an aryl group, an arylalkyl group, or a C 1 -C 20 acyl group, and wherein;
the mol ratio of the host compound to the guest compound is from 0.95 to 1.4, and wherein;
the average particle size D 50 of the clathrate as measured by laser diffraction (ASTM D4464) is, in the range of from 5 to 40 μm, and wherein; and
the guest component of the clathrate comprises an accelerator or curative compound having an amino group.

2. The clathrate according to a claim 1 wherein the host compound is of the formula

wherein both X and X 1 are oxygen.

3. The clathrate according to claim 1 wherein the host compound is of the formula

wherein X, X 1 , X 2 and X 3 are all oxygen.

4. The clathrate according to claim 3 wherein Y 1 and Y 2 are amino groups.

Assignees

• Hexcel Composites Ltd

Inventors

• Mason Christopher Robert

Classifications

• C08K5/5313 Primary

  Phosphinic compounds, e.g. R2=P(:O)OR' · CPC title

• C08K5/3445

  Five-membered rings · CPC title

• C07F9/304 Primary

  Aromatic acids (P-C aromatic linkage) · CPC title

• C09J163/00

  Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins · CPC title

• C08G59/70

  Chelates · CPC title