Polynt Composites France

Ccp Composites

Serge Herman

Thierry Foussard

Christine Dhersin

Paul Darby

Guillaume Cledat

Urbain Coudevylle

Patrick Belliard

Jérôme Mazajczyk

Roland Delory

Francis Verdiere

Jerome Mazajczyk

The invention provides a powder pre-preg comprising as sole resin a vinyl ester resin having a Tg in the range of &#x2212;5 to +30&#xb0; C. and a melt viscosity @100&#xb0; C. in the range of 2 to 75 dPa&#xb7;s, which can be used in making a composite at a temperature as low as 80&#xb0; C.

Vinyl ester powder pre-preg

An ethylenically unsaturated prepolymer comprising an ending X which reacts by condensation being a hydroxyl and/or amine or free isocyanate group and optionally an ending X' having ethylenic unsaturation, the prepolymer being the reaction product of a first component A comprising a mixture of i) a first ethylenically unsaturated resin carrying specific hydroxyl and/or amine reactive endings, and/or ii) optionally a second resin different from resin i), being an ethylenically unsaturated hydroxylated resin and/or a hydroxylated and/or aminated saturated resin, and/or iii) optionally a third reactive saturated resin, iv) optionally an unsaturated monoalcohol up to 30% in equivalents of the OH+NHtotal, and a second component B comprising a polyisocyanate with a functionality equal to 2 or greater than 2, A and B being in proportions to effectively avoid any gelling by crosslinking.

Unsaturated polyester-urethane prepolymer and its applications

The invention relates to a heat curable composition for fire-resistant or intumescent composite parts, which is free of any halogen additive or halogen structure in the components thereof, and which comprises: a) 100 parts by weight of a dry resin, including a1) an unsaturated polyester having an acid index lower than 10 and/or a2) a vinyl ester; b) 40 to 200 parts by weight of a reactive thinner among ethylenically unsaturated monomers; c) 20 to 110 parts by weight of a thermal expansion agent selected from melamine and derivatives thereof, guanidine, glycine, urea, triisiocynurates, and azodicarbinamide; d) 0 to 250 parts by weight of aluminium trihydrate; e) 10 to 80 parts by weight of a carbonisation precursor agent selected from multifunctional polyols; f) 50 to 200 parts by weight of a compound selected from a phosphorus derivative and/or a boric acid derivative; g) optionally at least one metal oxide; h) optionally other additives and fillers; i) optionally reinforcements containing natural or synthetic fibres and related fabrics, wherein the acid component of the polyester a1) contains at least 60 mol % of acid and/or maleic anhydride and the polyol component contains at least 70 mol % of propylene glycol. The compositions can be used in the field of transport, building, public works, civil engineering and recreation or street furniture with intumescent composite parts or coatings that comply at least with criterion HL2 of the R1 requirement of prCEN/TS 45545-2:2008.

Heat curable composition for composite parts and intumescent coatings

Growing community of inventors

Noeux les Mines, France

Serge Herman