Prepreg, process for preparation of prepreg, and products derived therefrom
AssigneeNikkiso Co., Ltd.
InventorsKazuo Miyamichi, Hiroyuki Nakamura
Life of this patent
Estimating the term…
Abstract
A new prepreg material having good tack drape properties and feasible out-time and articles derived therefrom as well as processes for preparation these products are disclosed. The prepreg is prepared by impregnating inorganic fibers with a compostion comprising: (A) fine powder of a metal oxide or oxides having an average particle diameter of not larger than 1 .mu.m, (B) a soluble siloxane polymer having double chain structure, (C) a trifunctional silane compound having at least one ethylenically unsaturated double bond in the molecule thereof, (D) a organic peroxide, (E) a radically polymerizable monomer having at least two ethylenically unsaturated double bonds; and heating the impregnated fibers.
Claims21
Prepreg formed by impregnating tow or fabric of inorganic fibers with a matrix composition or thermally infiltrating the matrix composition into the tow or fabric, said matrix composition comprising:
- (A) 350-750 parts by weight of a fine powder of a metal oxide or oxides having an average particle diameter of not larger than 1 .mu.m,
- (B) 80-170 parts by weight of a soluble siloxane polymer having double chain structure,
- (C) 25-125 parts by weight of a trifunctional silane compound having at least one ethylenically unsaturated double bond in the molecule thereof,
- (D) 1-4 parts by weight of an organic peroxide, and
- (E) 25-125 parts by weight of a radically polymerizable monomer having at least two ethylenically unsaturated double bonds.
Process for preparing prepreg, which comprises dissolving and dispersing the components
- (A) 350-750 parts by weight of a fine powder of a metal oxide or oxides having an average particle diameter of not larger than 1 .mu.m,
- (B) 80-170 parts by weight of a soluble siloxane polymer having double chain structure,
- (C) 25-125 parts by weight of a trifunctional silane compound having at least one ethylenically unsaturated double bond in the molecule thereof,
- (D) 1-4 parts by weight of an organic peroxide, and
- (E) 25-125 parts by weight of a radically polymerizable monomer having at least two ethylenically unsaturated double bonds in a solvent, impregnating tow or fabric or inorganic fibers with or applying to them the resulting liquid and removing at least part of the solvent.
Process for preparing fired prepreg articles, comprising heating the cured prepreg articles of claim 12 to 500.degree.-1,200.degree. C.
Process for preparing prepreg, which comprises dissolving the components
- (A) 350-750 parts by weight of a fine powder of a metal oxide or oxides having an average particle diameter of not larger than 1 .mu.m,
- (B) 80-170 parts by weight of a soluble siloxane polymer having double chain structure,
- (C) 25-125 parts by weight of a trifunctional silane compound having at least one ethylenically unsaturated double bond in the molecule thereof,
- (D) 1-4 parts by weight of an organic peroxide, and
- (E) 25-125 parts by weight of a radically polymerizable monomer having at least two ethylenically unsaturated double bonds in a solvent, removing part of the solvent from the mixture and thermally infiltrating the resulting concentrated composition into a bundle of tow or a sheet of inorganic fibers.
Dependencies are inferred from the claim text.