摘要:
The invention relates to a thermoplastic polymer comprising at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A) and at least one high-viscosity terephthalic acid unit (C).
摘要:
The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising: • a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol; • a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminium, or a catalyst comprising the elements germanium and aluminium, or a mixture of said two catalysts; • a step of polymerising said monomers to form the polyester; • a step of recovering a polyester composition comprising the polyester and the catalytic system. The invention also concerns a polyester composition containing a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminium, or a catalyst comprising the elements germanium and aluminium, or a mixture of said two catalysts, and the use of same to reduce the colouring of the polyester.
摘要:
The present invention relates to copolymers, in particular poly(butylenesuccinate-co-furanoate) (PBSF) copolymers, which have advantageous mechanical properties, and also to polymeric compositions comprising them. It also relates to a process for preparing these polymers.
摘要:
The present invention relates to the use of bis-anhydrohexitol ethers as reactive diluents in a crosslinkable resin, adhesive, coating or matrix composition for composites. Said products not only help advantageously reduce the viscosity of the obtained mixtures, but also produce a very small reduction in the glass transition temperature of the crosslinked mixtures, compared to other reactive diluents, while spectacularly improving the mechanical properties of the latter, such as the Young's modulus, tensile strength, elongation at break and toughness.