Benzoxazine resins

Patent metadata

Field	Value
Publication number	US-9732225-B2
Application number	US-201514985550-A
Country	US
Kind code	B2
Filing date	Dec 31, 2015
Priority date	Jan 25, 2011
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A curable polymer composition containing: (A) a thermoset benzoxazine resin precursor component; (B) optionally, an aryl sulphone-containing benzoxazine component, and (C) a polyarylsulphone thermoplastic toughening agent, wherein in the absence of component (B), component (C) contains one or more benzoxazine pendant- and/or end-groups.

First claim

The invention claimed is:

1. A curable polymer composition comprising:
(A) a thermoset benzoxazine resin precursor component; and
(C) a polyarylsulphone thermoplastic toughening agent component comprising benzoxazine pendant and/or end-groups.

2. A composition according to claim 1 wherein component (C) comprises benzoxazine-terminated polyarylsulphone compounds.

3. A composition according to claim 1 wherein said polyarylsulphone thermoplastic toughening agent component (C) is present at no more than about 50% by weight, relative to the total weight of components (A) and (C) in the composition.

4. A composition according to claim 1 wherein the component (A) comprises a compound of formula (I):

wherein:
Z 1 is selected from a direct bond, —C(R 3 )(R 4 )—, —C(R 3 )(aryl)-, —C(O)—, —S—, —O—, —S(O)—, a divalent heterocycle and —[C(R 3 )(R 4 ) x -arylene-[C(R 5 )(R 6 )] y —, or the two benzyl rings of the benzoxazine moieties may be fused;
R 1 and R 2 are independently selected from alkyl, cycloalkyl and aryl;
R 3 , R 4 , R 5 and R 6 are independently selected from H, C 1-8 alkyl, and halogenated alkyl; and
x and y are independently 0 or 1.

5. A composition according to claim 1 further comprises one or more reactive diluents.

6. A composition according to claim 5 , wherein said reactive diluents are thermoset polymer precursors selected from epoxy resins and phenolic resins, and said reactive diluents are present from about 20% to about 40% by weight of component (A) in the composition.

7. A composite comprising the composition of claim 1 and reinforcing fibres.

8. A composite according to claim 7 , wherein said reinforcing fibres are made of a material selected from the group consisting of: glass, alumina, zirconia, silicon carbide, ceramics, metals, carbon, and poly paraphenylene terephthalamide.

Assignees

• Cytec Tech Corp

Inventors

• Ward Steven Richard
• Cross Paul Mark
• Maskell Robin

Classifications

• C08L81/06 Primary

  Polysulfones; Polyethersulfones · CPC title

• C08L79/04 Primary

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors · CPC title

• C07D265/16

  with only hydrogen or carbon atoms directly attached in positions 2 and 4 · CPC title

• C08L79/02

  Polyamines · CPC title

• C08G73/0233

  Polyamines derived from (poly)oxazolines, (poly)oxazines or having pendant acyl groups · CPC title