Sized glass fibers intended for reinforcing polymers
AssigneeVetrotex France S. A.
InventorMichel Gonthier
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Abstract
The invention relates to glass fibers coated with an sizing composition. The said sizing composition, which is obtained in particular from an aqueous solution, comprises as bonding film-forming agents, a combination, of at least one low-molecular-weight polyvinyl acetate A, of at least one thermally self-crosslinking polyvinyl acetate copolymer B, in an A/B weight ratio greater than or equal to 1.
Claims34
Glass fiber coated with a sizing composition, characterized in that the said sizing composition, which is obtained from an aqueous solution, comprises as bonding film-forming agents a combination:
- of at least one low-molecular-weight polyvinyl acetate A,
- of at least one thermally self-crosslinking copolymer B of vinyl acetate and at least one other different monomer in an A/B weight ratio greater than or equal to 1.
Sizing composition in aqueous solution intended to coat glass fibers, characterized in that it contains:
- a low-molecular-weight polyvinyl acetate A in a content, as a percentage by weight of the aqueous solution, of between 5 and 9,
- a thermally self-crosslinking polyvinyl acetate copolymer B in a content, as a percentage by weight of the aqueous solution, of between 1 and 4, and also with an A/B weight ratio ≧1,
- an aminosilane E and an unsaturated silane F in a content, as a percentage by weight of the aqueous solution, of between 0.05 and 5,
- one (or more) plasticizer(s) C in a content, as a percentage by weight of the aqueous solution, of between 0.4 and 0.9,
- at least one surfactant D in a content, as a percentage by weight of the aqueous solution, of between 0.1 and 0.4,
- one (or more) lubricant(s) G in a content, as a percentage by weight of the aqueous solution, of between 0.1 and 0.3.
Dependencies are inferred from the claim text.