JPWO2021053292A5 - - Google Patents

Claims (22)

Semi-crystalline whose tensile modulus or flexural modulus does not vary by more than 25% in a temperature range of 10°C to 40°C, especially in a temperature range of 0°C to 40°C, especially in a temperature range of -10°C to 40°C. Use of a mixture of at least one semi-crystalline aliphatic polyamide and at least one amorphous polyamide to prepare a polyamide composition, the at least one semi-crystalline aliphatic polyamide comprising:
at least one C ₆ -C ₁₈ , preferentially C ₁₀ -C ₁₈ , more preferentially C ₁₀ -C ₁₂ amino acid, or at least one C ₆ -C ₁₈ , preferentially C ₁₀ -C ₁₈ , more preferentially C ₁₀ -C ₁₂ lactams, or at least one C ₄ -C ₃₆ , preferentially C ₅ -C ₁₈ , preferentially C ₅ -C ₁₂ , more preferentially preferably C ₁₀ -C ₁₂ aliphatic diamine Ca and at least one C ₄ -C ₃₆ , preferentially C ₆ -C ₁₈ , preferentially C ₆ -C ₁₂ , more preferentially Use obtained by polycondensation with C ₁₀ -C ₁₂ aliphatic dicarboxylic acids Cb. Use according to claim 1, wherein the elastic modulus does not vary by more than 35% in the temperature range from -10°C to 50°C. The Tg of said semi-crystalline composition determined by DMA according to ISO 6721-11:2019 is 5°C or more, preferentially 10°C, relative to the initial Tg of said semi-crystalline aliphatic polyamide before mixing. The use according to claim 1 or 2, which exhibits an increase of more than 15°C, more preferentially 15°C or more. The at least one amorphous polyamide is a homopolyamide of the formula XY or a copolyamide of the formula A/XY, and XY comprises at least one alicyclic diamine (X) and at least one C ₄ - C ₃₆ , preferentially C ₆ -C ₁₈ , preferentially C ₆ -C ₁₂ , more preferentially C ₁₀ -C ₁₂ aliphatic dicarboxylic acids (Y), or at least one aromatic dicarboxylic acid (Y) A repeating unit obtained by polycondensation with acid (Y), in which A is at least one C ₆ to C ₁₈ , preferentially C ₁₀ to C ₁₈ , more preferentially C ₁₀ to C ₁₂ an amino acid, or at least one C ₆ -C ₁₈ , preferentially C ₁₀ -C ₁₈ , more preferentially C ₁₀ -C ₁₂ lactam, or at least one C ₄ -C ₃₆ , preferentially is a C ₅ -C ₁₈ , preferentially C ₅ -C ₁₂ , more preferentially C ₁₀ -C ₁₂ Ca diamine and at least one C ₄ -C ₃₆ , preferentially C ₆ -C ₁₈ , a repeating unit obtainable by polycondensation with a preferentially C ₆ -C ₁₂ , more preferentially C ₁₀ -C ₁₂ dicarboxylic acid Cb. Use of. said at least one amorphous polyamide is a copolyamide of the formula A/XY, where A is obtained by polycondensation of at least one amino acid or by polycondensation of at least one lactam; is selected from bis-(3-methyl-4-aminocyclohexyl)-methane (B) or bis(p-aminocyclohexyl)-methane (P) or bis(aminomethyl)cyclohexane (BAC), and Y is terephthalic acid. and/or isophthalic acid. A/XY is in units of 11/BI/BT, 12/BI/BT, 11/BACI/BACT, 12/BACI/BACT, 11/BACI, 12/BACI, 11/PI/PT, 12/PI/PT, The use according to claim 4 or 5, selected from: and mixtures thereof. said at least one amorphous polyamide is a copolyamide of the formula A/XY, where A is obtained by polycondensation of at least one amino acid or by polycondensation of at least one lactam; is selected from bis-(3-methyl-4-aminocyclohexyl)-methane (B) or bis(p-aminocyclohexyl)-methane (P), and Y is sebacic acid or dodecanedioic acid. Uses as described in. 4. A/XY is selected from the units 11/B10, 11/B12, 11/P10, 11/P12, 12/B10, 12/B12, 12/P10, 12/P12, and mixtures thereof. or the use described in 7. The at least one amorphous polyamide is a copolyamide of the formula A/XY, A is obtained by polycondensation of at least one diamine Ca and at least one dicarboxylic acid Cb, and X is -(3-Methyl-4-aminocyclohexyl)-methane (B) or bis(p-aminocyclohexyl)-methane (P), and Y is sebacic acid or dodecanedioic acid. use. A / Use according to claim 4 or 9, selected from 1210/P12, 1212/B10, 1212/B12, 1212/P10, 1212/P12, and mixtures thereof. The at least one amorphous polyamide is a homopolyamide of formula XY, where X is bis-(3-methyl-4-aminocyclohexyl)-methane (B) or bis(p-aminocyclohexyl)-methane ( 5. The use according to claim 4, wherein Y is sebacic acid or dodecanedioic acid. Use according to claim 4 or 11, wherein XY is selected from the units B10, B12, P10, P12 and mixtures thereof. 13. Use according to any one of claims 1 to 12, wherein the semi-crystalline copolyamide has an enthalpy of crystallization of more than 30 J/g. Preferably, the proportion by weight of said amorphous polyamide is from 10 to 45%, relative to the sum by weight of said at least one semicrystalline aliphatic polyamide and said at least one amorphous polyamide. Use according to any one of claims 1 to 13, between 15 and 35% by weight, more preferentially between 20 and 30% by weight. Use according to any one of claims 1 to 14, wherein the semi-crystalline composition comprises 35 to 75% by weight of reinforcing fibers, in particular 35 to 65% by weight of reinforcing fibers. 16. Use according to claim 15, wherein the reinforcing fibers are selected from glass fibers and carbon fibers or mixtures thereof, especially glass fibers. The glass fibers include glass fibers with a non-circular cross-section, and glass fibers with a circular cross-section, carbon fibers, and mixtures thereof, in particular glass fibers with a non-circular cross-section, glass fibers with a circular cross-section, and mixtures thereof. 17. The use according to claim 16, wherein the glass fibers are selected from glass fibers, in particular having a circular cross section. - 25 to 65% by weight, in particular 35 to 65% by weight of at least one semicrystalline aliphatic polyamide and at least one amorphous polyamide according to any one of claims 1 to 14; blend,
- 35-75% by weight, in particular 35-65% by weight of reinforcing fibers,
- 0 to 10% by weight of at least one impact modifier,
- 0 to 30% by weight of at least one filler ,
- a composition comprising from 0 to 10% by weight of at least one fluidizing agent and - from 0 to less than 2% by weight, preferably from 0.1 to less than 2% by weight, in particular from 0.5 to less than 2% by weight of additives. A composition useful for products, especially injection molding, wherein the sum of the proportions of each component of said composition is equal to 100%. 19. A method for producing a composition according to claim 18, wherein the components of the composition are mixed, in particular by compounding in a twin-screw extruder, a co-mixer or an internal mixer. . Molded article obtainable by injection molding from the composition according to claim 18. Molded article according to claim 20, for electrical and electronic applications, in particular for applications selected from the group consisting of televisions, digital cameras, digital games, telephone parts, digital tablets, drones, printers or computer parts. Sports applications, in particular ski boots or ski boot parts, or rigid shoes with cleats, such as soccer, rugby or football footwear, hockey footwear or parts of hockey footwear, or running shoes, golf balls or golf balls or hockey articles such as lacrosse sticks, or even helmets, or sports articles for protecting the head, shoulders, elbows, hands, knees, back or shins, such as helmets, gloves, shoulder pads, elbow pads. 21. A molded article according to claim 20, for a knee pad or shin guard.