Process for production of a composite product
AssigneeCray Valley S.A.
InventorsYeong-Show Yang, Francette Porato, Serge Lequeux
Life of this patent
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Abstract
The invention relates to a process for production of a composite product which involves molding several materials of different natures, including an oriented-reinforcement material that is preimpregnated with resin, without the resin being injected separately after the other materials in the mold are assembled, in which the resin is a modified polyester-polyurethane that is formed by reacting: a first component that comprises (A) at least one polyisocyanate with a second component that comprises: (a) at least one polyol polyester, (b) at least one ethylenically unsaturated monomer.
Claims20
A process for production of a composite product, comprising:
- juxtaposing at least one first material and an oriented-reinforcement material that is preimpregnated with resin,
- molding at a time and temperature effective to harden the resin and to connect the oriented reinforcements and to adhere the oriented reinforcement material to said at least one first material of the composite product,
- wherein said at least one first material and the resin are assembled simultaneously before the application of temperature in molding stage, such that the resin is not injected separately after the other materials in the mold are assembled,
- and wherein in said process said resin is a modified polyester-polyurethane that is formed by reacting:
- a first component that comprises (A) at least one polyisocyanate that has a functionality of 2 to 3 and (B) a peroxide or a peroxide mixture that is able to initiate polymerization by free radicals, at a ratio such that:
- ##EQU6## is about 0.5 to 4% by weight, with a second component that comprises:
- (a) at least one polyol polyester that is prepared from at least one diacid or ethylenically unsaturated anhydride and at least one polyhydric alcohol at an alcohol/acid molar ratio of about 1.3 to 2.0,
- (b) at least one ethylenically unsaturated monomer at a ratio such that ##EQU7## is 10% to 50% by weight, and (c) at least one promoter of the decomposition of the catalyst peroxide in the first component at room temperature (20.degree. C.), in an amount of about 0 to 4% by weight with respect to the level of the second component,
- (d) at least one catalyst of the isocyanate-alcohol reaction, in an amount of about 0 to 4% by weight with respect to the level of the second component, and
- (e) at least one hydroxylated (alk)acrylate at a ratio such that ##EQU8## is between about 0.1% and 35% by weight, the ratio in moles of the NCO functions in the first component to the sum of the OH functions of components (a) and (e) of the second component being about 0.7 to 1.1.
A process for production of a composite product comprising molding at least one first material juxtaposed with an oriented reinforcement material preimpregnated with resin, which resin has been assembled with said first material prior to molding and not injected separately after materials to be molded are assembled, said molding being at a time and temperature effective to adhere to the oriented reinforcement material to said first material,
- wherein in said process said resin is a modified polyester-polyurethane that is formed by reacting:
- a first component that comprises (A) at least one polyisocyanate that has a functionality of 2 to 3 and (13) a peroxide or a peroxide mixture that is able to initiate polymerization by free radicals, at a ratio such that:
- ##EQU9## is about 0.5 to 4% by weight, with a second component that comprises:
- (a) at least one polyol polyester that is prepared from at least one diacid or ethylenically unsaturated anhydride and at least one polyhydric alcohol at an alcohol/acid molar ratio of about 1.3 to 2.0,
- (b) at least one ethylenically unsaturated monomer at a ratio such that ##EQU10## is 10% to 50% by weight, and (c) at least one promoter of the decomposition of the catalyst peroxide in the first component at room temperature (20.degree. C.), in an amount of about 0 to 4% by weight with respect to the level of the second component,
- (d) at least one catalyst of the isocyanate-alcohol reaction, in an amount of about 0 to 4% by weight with respect to the level of the second component, and
- (e) at least one hydroxylated (alk)acrylate at a ratio such that ##EQU11## is between about 0.1% and 35% by weight, the ratio in moles of the NCO functions in the first component to the sum of the OH functions of components (a) and (e) of the second component being about 0.7 to 1.1.
Dependencies are inferred from the claim text.