Phenolic resin molding compound

Patent metadata

Field	Value
Publication number	US-9228084-B2
Application number	US-201314080942-A
Country	US
Kind code	B2
Filing date	Nov 15, 2013
Priority date	Sep 6, 2011
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

A phenolic resin molding compound includes (A) a novolac-type phenolic resin including an alkylbenzene-modified novolac-type phenolic resin, (B) a resol-type phenolic resin, (C) hexamethylenetetramine, (D) graphite, and (E) fiber-shaped filler, wherein in regard to the content of each component on the basis of the entirety of the molding compound, a total content of the components (A) to (C) is 30 to 40% by weight, a content of the component (D) is 30 to 50% by weight, and a content of the component (E) is 5 to 20% by weight.

First claim

What is claimed is:

1. A phenolic resin molding compound, comprising:
(A) a novolac-type phenolic resin, comprising an alkylbenzene-modified novolac-type phenolic resin;
(B) a resol-type phenolic resin;
(C) hexamethylenetetramine;
(D) graphite; and
0% of (E) fiber-shaped filler,
wherein a total content of the components (A) to (C) is 30 to 40% by weight based on an entirety of the molding compound,
wherein a content of the component (C) is 30 to 40 parts by weight based on 100 parts by weight of the component (A), and
wherein a content of the component (D) is 30 to 50% by weight based on the entirety of the molding compound.

2. The phenolic resin molding compound according to claim 1 ,
wherein a content of the alkylbenzene-modified novolac-type phenolic resin in the component (A) is 20 to 30% by weight based on a total content of the components (A) and (B).

3. The phenolic resin molding compound according to claim 2 ,
wherein the content of the alkylbenzene-modified novolac-type phenolic resin in the component (A) is 20 to 25% by weight based on a total content of the components (A) and (B).

4. The phenolic resin molding compound according to claim 1 ,
wherein a modification ratio of alkylbenzene in the alkylbenzene-modified novolac-type phenolic resin is 3% by weight to 70% by weight.

5. The phenolic resin molding compound according to claim 1 ,
wherein in a case where a rectangular parallelepiped test specimen of 8×4×2 mm, which is obtained by injection-molding a granular molding compound at a mold temperature of 180° C. and a curing time of 15 seconds, is annealed at 160° C. for six hours and then is dipped in warm water at 80° C. for 72 hours, when a ratio of a dimension in 8 mm direction after being dipped with respect to a dimension in the 8 mm direction before being dipped is set as a dimensional change ratio, the dimensional change ratio is 0.32% or less.

6. A sliding part, comprising the phenolic resin molding compound according to claim 1 .

Assignees

• Sumitomo Bakelite Co

Inventors

• Inokawa Daisuke

Classifications

• C08K3/04 Primary

  Carbon · CPC title

• C08K5/3477

  Six-membered rings · CPC title

• F16D2200/0065

  Inorganic, e.g. non-asbestos mineral fibres · CPC title

• C08L61/06

  of aldehydes with phenols · CPC title

• C08K13/04

  Ingredients characterised by their shape and organic or inorganic ingredients · CPC title