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AssigneeVetrotex France
InventorsPatrick Moireau, Christelle Pousse
Estimating the term…
A glass yarn sizing composition consisting of a solution having a viscosity of at most 400 cP and including less than 5 wt. % of solvent and at least one basic heat-polymerisable system which includes at least 60 wt. % of components having a molecular weight of less than 750, and at least 60 wt. % of a mixture of one or more components having at least one epoxy reactive function, and one or more components having at least one (preferably primary or secondary) amine reactive function, wherein the amount of components having at least one amine reactive function represents at least 6 wt. % of the composition. A method using said composition, and the resulting yarns coated with said composition, are also disclosed.
Glass strand coated with a sizing composition composed of a solution with a viscosity of less than or equal to 400 cP comprising less than 5% by weight of solvent and comprising at least one thermally polymerizable and/or crosslinkable base system, the said base system comprising at least 60% by weight of components with a molecular mass of less than 750 and comprising at least 60% by weight of a mixture:
Sizing composition for a glass strand composed of a solution with a viscosity of less than or equal to 400 cP comprising less than 5% by weight of solvent and comprising at least one thermally polymerizable and/or crosslinkable base system, the said base system comprising at least 60% by weight of components with a molecular mass of less than 750 and comprising at least 60% by weight of a mixture:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds: epoxy resins
Coatings containing organic materials: macromolecular compounds or prepolymers
Using pretreated fibrous materials: glass fibres
Coated or with bond, impregnation or core: coating on discrete and individual rods, strands or filaments
Term ended 4 Sep 2017 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
Field of the Invention
The present invention relates to a sizing composition for glass strands, this composition reacting to heat. The present invention also relates to a process for the production of reinforcing glass strands using this composition as well as to the glass strands obtained and to the composites produced from the strands.
In the continuation of the text, "polymerization", "to polymerize", "polymerizable" and the like are understood to mean "polymerization and/or crosslinking", "to polymerize and/or to crosslink", "polymerizable and/or crosslinkable" and the like respectively.
Other advantages and characteristics of the invention will become apparent in the light of the following examples giving, by way of illustration but without implied limitation, sizing compositions according to the invention and characteristics of the strands coated with these compositions or characteristics of the composites comprising the said strands.
Filaments with a diameter of 14 microns obtained by drawing molten glass streams according to the process of the invention are coated with the size with the following composition, expressed as percentages by weight:
______________________________________ Components of the base system with a molecular mass of less than 750: Trimethylolpropane triglycidyl ether.sup.(1) 32.0% 2-Ethylhexyl glycidyl ether.sup.(2) 40.0% Mixture based on primary aromatic amines.sup.(3) 16.0% Additives: .gamma.-Methacryloyloxypropyltrimethoxysilane coupling agent.sup.(4) 12.0% ______________________________________