Loading patent…
AssigneeSaint-Gobain Vetrotex France S.A.
InventorPatrick Moireau
Estimating the term…
The present invention relates to a sizing composition for glass strands, consisting of a solution whose solvent content is less than or equal to 5% by weight, this solution comprising at least 45% by weight of components capable of curing, these components being, in respect of at least 40% of them, components with a molecular mass of between 750 and 5000 and these curable components comprising at least one mixture capable of curing: one or more components having at least one acrylic and/or methacrylic functional group and one or more components having at least one primary and/or secondary amine functional group. The invention also relates to a process using this composition, to the strands coated with said composition and to the composites obtained from these strands.
A glass strand coated with a sizing composition consisting of a solution whose solvent content is less than 5% by weight, this solution comprising at least 45% by weight of components capable of curing, these curable components being, in respect of at least 40% of them, components with a molecular mass of between 750 and 5000 and these curable components comprising at least one mixture capable of curing:
A sizing composition for glass strand, consisting of a solution whose solvent content is less than 5% by weight, this solution comprising at least 45% by weight of components capable of curing, these curable components being, in respect of at least 40% of them, components with a molecular mass of between 750 and 5000 and these curable components comprising at least one mixture capable of curing:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Coatings containing organic materials: macromolecular compounds or prepolymers
Rod, strand, filament or fiber: coated or with bond, impregnation or core
Coated or with bond, impregnation or core: coating on discrete and individual rods, strands or filaments
Coated or with bond, impregnation or core: artificial fiber or filament
Term end not estimated
The present invention relates to the field of reinforcing fibers, especially for the production of composites. It relates to a sizing composition for glass strands, to a process for preparing said strands using this composition and to the glass strands obtained and the composites produced from these strands.
It is known to manufacture glass reinforcing strands from streams of molten glass flowing out of the orifices of bushings. These streams are drawn in the form of continuous filaments, then these filaments are assembled into base strands, which are then collected.
Before they are assembled in the form of strands, the filaments are usually coated with a size or sizing composition by passing them through a sizer. This deposition of size is very important as it makes it possible, on the one hand, to obtain the strands and, on the other hand, to use these strands effectively in making up composites. The size has the following usual functions: it protects the strands from abrasion, thus preventing them from breaking during their manufacture and possibly during their use; it allows the strands thus formed to be combined with organic and/or inorganic materials to be reinforced, especially making it easier for the strands to be wetted by and impregnated with these materials.
Filaments 13.6 μm in diameter obtained by drawing streams of molten E glass, flowing from a bushing (800 orifices), were coated with the following first composition A and then with the following second composition B (in percentages by weight): 1 Composition A polyester tetraacrylate of molecular mass = 1000(1) 18 aromatic polyurethane hexaacrylate of 18 molecular mass = 1000(2) gamma-methacryloxypropyltrimethoxysilane(3) 11 gamma-glycidoxypropyltrimethoxysilane(4) 10 4-octylphenyl ethyl ether(5) 5 Composition B mixture of C,C,C-trimethylhexane-1,6-diamine, 10 of xylylenediamine and of para-tert-butylphenol(6) trimethylolpropane trioctanoate(7) 15 ethoxylated (4EO) lauric alcohol(8) 13
The compositions A and B had a viscosity, measured on a SOFRASER MIVI 4000 apparatus sold by SOFRASER, of 135.4×10−3 Pa.s (135.4 cP) and 52×10−3 Pa.s (52 cP) at 25° C., respectively. The ratio r was 1.66.
The filaments were assembled as strands which were wound as rovings.