摘要:
A method of forming a three-dimensional object of polyurethane, polyurea, or copolymer thereof is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including at least one of: (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyante, or (iii) a blocked or reactive blocked diisocyanate chain extender; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the chain extender; and then (d) heating or microwave irradiating the three-dimensional intermediate sufficiently to form from the three-dimensional intermediate the three-dimensional object of polyurethane, polyurea, or copolymer thereof.
摘要:
A method of forming a three-dimensional object is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from the first component; (c) irradiating the build region with light through the optically transparent member to form a solid polymer scaffold from the first component and also advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, and containing the second solidifiable component carried in the scaffold in unsolidified and/or uncured form; and (d) concurrently with or subsequent to the irradiating step, solidifying and/or curing the second solidifiable component in the three-dimensional intermediate to form the three-dimensional object.
摘要:
The present invention is a composition comprising: a) one or more isocyanate functional prepolymers; b) one or more compounds containing a cycloaliphatic tertiary amine; c) one or more compounds containing a peroxide group; and d) one or more acrylate containing components. The system can be used in the form of a two part adhesive or in the form of a one part adhesive and an activator adapted to be applied to the surface of one or more of the substrates to which the adhesive is to be bonded.
摘要:
A method of forming a three-dimensional object of polyurethane, polyurea, or copolymer thereof is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including at least one of: (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyante, or (iii) a blocked or reactive blocked diisocyanate chain extender; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the chain extender; and then (d) heating or microwave irradiating the three-dimensional intermediate sufficiently to form from the three-dimensional intermediate the three-dimensional object of polyurethane, polyurea, or copolymer thereof.
摘要:
The present invention relates to a molding material, having: (A): a fiber substrate made of carbon fibers 5 mm or longer; (B): at least either an epoxy (meth)acrylate resin or an unsaturated polyester resin; (C): (C-1) inorganic fibrous filler with a cross-sectional area of at least 0.8 µm 2 , or (C-2) inorganic flaky filler with a cross-sectional area of at least 0.05 µm 2 , both of which have an aspect ratio of 2.0 or higher and a length of less than 3 mm; and (D): a polyisocyanate compound.
摘要:
Polyester polyols containing adducts formed from Diels-Alder and Ene reactions are disclosed. Processes for making the polyester polyols and uses of the polyester polyols as polyurethane coatings, adhesives, sealants, elastomers, and foams are also disclosed. In some embodiments, the polyester polyols contain biorenewable adducts based on maleic anhydride and farnesene and have particular application in making rigid and flexible polyurethane or polyisocyanurate foams.
摘要:
The present invention relates to a molding material, having: (A): a fiber substrate made of carbon fibers 5 mm or longer; (B): at least either an epoxy (meth)acrylate resin or an unsaturated polyester resin; (C): (C-1) inorganic fibrous filler with a cross-sectional area of at least 0.8 µm 2 , or (C-2) inorganic flaky filler with a cross-sectional area of at least 0.05 µm 2 , both of which have an aspect ratio of 2.0 or higher and a length of less than 3 mm; and (D): a polyisocyanate compound.
摘要:
The present invention relates to a composition comprising a polymeric network having at least one unit of formula (I), (II), and/or (III); (I) (II) (III) wherein said composition is obtained by contacting at least one compound A comprising at least two functions selected from the group of function of formula X-C(=O)-CHR1-C(=O)-R2, -C(=O)-C -R2; or -C(=O)-CR1=CR2-NR4R5; wherein at least 25 % by weight of compounds A have a functionality ≤5, with % by weight relative to the total weight of compounds A; with at least one compound B comprising at least one NH2, or NH3 + groups; wherein X, R1, R2, R3, R4, R5, L1 and L2 have the same meaning as that defined in the claims. The present invention also relates to a compound comprising at least two units and at most 5 units of formula (I), (II), and/or (III); wherein R1, R2, R3, X, L1 and L2 have the same meaning as that defined in the claims. The present invention also relates to processes for preparing said composition and said compounds, to material, articles, and polymers comprising or using said compositions and compounds, and the use thereof.
摘要:
A soil-resistant transfer sheet which comprises, in the following order, a substrate sheet (a), a soil-resistant layer (b), a coating layer (c), and optionally an adhesive layer (d), wherein a surface of the soil-resistant layer, which reveals after the substrate sheet (a) is removed, has a contact angle with water of 100° or larger and a contact angle with hexadecane of 40° or larger; a process for producing a molded resin by in-mold labeling using the transfer sheet. The soil-resistant layer (b) is a layer obtained from a soil-resistant composition, and the coating layer (c) is a layer obtained from a polymerizable coating composition. The soil-resistant composition especially preferably is a perfluoropolyether urethane acrylate composition.