21 results about "Polymeric liquid" patented technology

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 comprising 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 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 second solidifiable component; and then (d) solidifying and / or curing the second solidifiable component to form from said three-dimensional intermediate the three-dimensional object.

The present invention addresses the problem of providing a cured film-forming composition for forming a cured film for forming an alignment material which has excellent solvent resistance, can align polymerizable liquid crystals with high sensitivity, and has little liquid crystal rejection. [Solution] A composition for forming a cured film, an alignment material, and a phase difference material. The composition for forming a cured film contains (A) a compound having a photo-alignment group, (B) a polymer having a structural unit having an N-hydroxymethyl group or an N-alkoxymethyl group, and (C) a cyclodextrin derivative in which some or all of hydroxyl groups are modified.

Described herein are polymerizable liquids for 3D printing applications that, in some embodiments, impart flame retardancy and / or flame retardant properties to articles printed from the liquids. The polymerizable liquids can also impart desirable mechanical properties to the articles. In some embodiments, the polymerizable liquids include a brominated acrylate component and a curable isocyanurate component in an amount of at least 5 wt% based on the total weight of the polymerizable liquid. Further, described herein are methods of printing three-dimensional articles using the polymerizable liquids.

The application discloses a kind of equipment, method and nonvolatile storage medium for forming three-dimensional object.It relates to the field of 3D printing technology, the equipment includes: forming platform, three-dimensional object is formed on forming platform;Tray, forming platform and the forming surface between tray form for printing area;Optical module, for irradiating printing area;Controller, for controlling forming platform movement in printing process, so that forming platform and polymerizable liquid contact;Detection component, for obtaining liquid change state in the process that forming platform and polymerizable liquid contact;Controller is used to determine whether liquid layer thickness tends to be stable according to liquid change state, and controls optical module to irradiate printing area when liquid layer thickness tends to be stable.The application solves the technical problems that the pre-exposure waiting time applicability is poor and the hollow or printing layer thickness is not uniform in the related art based on the experience value to determine whether 3D printing ends exposure pre-waiting and enters exposure phase.

A high pressure mixing head for continuously producing polymeric foam comprises a body including a mixing chamber and injectors for injecting two polymeric liquids. The mixing head also includes a delivery duct which is disposed transversely to the mixing chamber, wherein a rod is slidably received in an internal passageway of the delivery duct. An alternate delivery duct is also included. The delivery duct and the alternate delivery duct are in flow communication with the mixing chamber via a switchable flow connection, and a control unit is configured to control the switchable flow connection and the positions of the rods in the delivery duct and the alternate delivery duct such that flow from the output opening of the mixing chamber can be selectively directed either to the delivery duct or to the alternate delivery duct.

The present disclosure relates to the technical field of 3D printing, and provides a device and method for forming a three-dimensional object, and a non-volatile storage medium. The device comprises: a forming platform on which a three-dimensional object is formed; a tray, a printing area being formed between the forming platform and a construction surface of the tray; an optical module, used for irradiating the printing area; a controller, used for controlling the forming platform to move during printing, so that the forming platform is in contact with a polymerizable liquid; and a detection assembly, used for acquiring a liquid change state during the contact between the forming platform and the polymerizable liquid. The controller is used for determining, on the basis of the liquid change state, whether the thickness of a liquid layer tends to be stable, and when the thickness of the liquid layer tends to be stable, controlling the optical module to irradiate the printing area. The present disclosure solves the technical problem in the related art of easy occurrence of a void or uneven printing layer thickness due to poor applicability of pre-exposure waiting time caused by whether to end pre-exposure waiting and enter an exposure stage in 3D printing being determined on the basis of an empirical value.

The present invention relates to a polymerizable liquid composition for the manufacture of an optical article, comprising: a) at least one allyl monomer or oligomer, b) at least one initiator for the polymerization of the allyl monomer or oligomer, and c) at least one lake pigment comprising an organic ionic colorant and at least one compound comprising a metal atom having an opposite charge to that of the organic ionic colorant, d) wherein even if the lake pigment is in the form of particles dispersed in the composition, the lake pigment is not comprised in nanoparticles, which are not the lake pigment itself.

Disclosed is a polymerizable liquid composition for the manufacture of an optical article, including: a) at least one allyl monomer or allyl oligomer, b) at least one initiator for the polymerization of the allyl monomer or allyl oligomer, and c) at least one lake pigment including an organic ionic colorant and at least one compound including metal atoms having a charge opposite to that of the organic ionic colorant, d) wherein the lake pigment is not contained in nanoparticles, which are not the lake pigment itself, if the lake pigment is in the form of particles dispersed in the composition.

This invention relates to functionalized polymeric liquid polysiloxane materials comprising a non-organic functionalized Q-type siloxane moiety and a mono-organic functionalized T-type siloxane moiety, wherein the material contains a limited amount of quaternary Q-type siloxanes relative to the total Q-type siloxane species. 2 - and / or Q 3 The invention relates to a type-1 siloxane cyclic species, possessing a functionalized degree of polymerization and a T-to-Q-ratio. It also relates to a method for producing polymeric liquid polysiloxane materials and related uses of such materials.

Described herein are additives for three-dimensional build materials or inks that, in some embodiments, can impart one or more structural reinforcements to articles printed with the build materials. In one aspect, a polymerizable liquid includes at least one additive including a plurality of cyclizable polymerizable functional groups separated by an aliphatic linker or an alkylene oxide linker.

The application discloses a kind of double-layer controllable crack material preparation method and application, belong to new material preparation field, the preparation method includes: the A component of Ecoflex silicone rubber is mixed with B component, and Ecoflex is obtained after being treated by defoaming polymerization liquid;The main agent of polydimethylsiloxane is mixed with curing agent, and polydimethylsiloxane is obtained after being treated by defoaming polymerization liquid;Ecoflex polymerization liquid is injected into mould, and is cured at first temperature for first preset time, and form semi-cured or solidified flexible bottom layer, and form Ecoflex / PDMS double-layer composite film;Indentation is applied to the predetermined area of double-layer composite film, and the film is pre-stretched, so that polydimethylsiloxane surface layer generates directional through crack along indentation;In the state of keeping pre-stretching or releasing strain, conductive material is deposited on the surface of film containing crack, and conductive network is formed, to obtain flexible strain sensor.The application is simple, low in cost and suitable for large-scale promotion.

The present description provides a reversibly end-capped reactive end-capped polyurethane prepolymer, a polymerizable liquid, and a 3D printing method. The reversibly end-capped reactive end-capped polyurethane prepolymer comprises a reactive end-capping group, a polyurethane prepolymer, and an independent protecting group. The polymerizable liquid comprises at least one type of the described reversibly end-capped reactive end-capped polyurethane prepolymer, and / or at least one type of reversibly end-capped reactive end-capped polyisocyanate, each type of reversibly end-capped reactive end-capped polyisocyanate comprising a reactive end-capping group, a polyisocyanate and an independent protecting group, as well as a reactive diluent and a photoinitiator. The polymerizable liquid does not contain an independent curing agent, which improves the overall stability of the polymerizable liquid.

Polymerizable liquids are described herein which, in some embodiments, can produce 3D printed articles of high resolution and desirable mechanical properties. In one aspect, a polymerizable liquid comprises an acrylate component, a polymeric additive, and a monomeric curing agent, wherein the acrylate component and monomeric curing agent are copolymerizable upon exposure to light. In being copolymerizable, the acrylate component and monomeric curing agent can form a copolymer. As described father herein, the monomeric curing agent can enable further reaction of the copolymer with one or more crosslinking species to link the copolymer with one more polymeric networks.

The disclosure describes a polymerizable liquid that includes a reactive oligomer and a reactive monomer. The polymerizable liquid is an energy polymerizable liquid hardenable by a single reaction mechanism forming a Photoplastic material. The disclosure further describes a method of producing the Photoplastic material and articles that can be made from the Photoplastic material.

The application discloses a device for forming a three-dimensional object, comprising: a forming platform, on which the three-dimensional object is formed; a construction surface, between which and the forming platform a printing area is defined, which is used to fill a polymerizable liquid; an optical module, which is used to irradiate the printing area to form a solid or semi-solid polymer from the polymerizable liquid; during the printing process, the forming platform is controlled to move so that the solid or semi-solid polymer is separated from the construction surface layer by layer; a detection assembly, which is used to acquire a change state during the separation of the solid or semi-solid polymer from the construction surface; and a controller, which is configured to be associated with the detection assembly and is used to control the movement of the forming platform according to the change state to form the three-dimensional object from the solid or semi-solid polymer. The application solves the technical problem that it is difficult to adapt to various printing conditions when separating the solid or semi-solid polymer from the construction surface with a fixed separation strategy.

The description of the present invention provides a reversibly and reactively blocked polyurethane prepolymer, a polymerizable liquid, and a 3D printing method. The reversibly and reactively blocked polyurethane prepolymer comprises a reactively blocking group, a polyurethane prepolymer, and an independent protecting group. The polymerizable liquid comprises at least one of the reversibly and reactively blocked polyurethane prepolymer, and / or at least one reversibly and reactively blocked polyisocyanate, wherein each reversibly and reactively blocked polyisocyanate comprises a reactively blocking group, a polyisocyanate, an independent protecting group, a reactive diluent, and a photoinitiator. The polymerizable liquid does not comprise an independent curing agent, thereby improving the overall stability of the polymerizable liquid.

A polymerizable liquid that can be used for producing three-dimensional objects by methods of additive manufacturing is disclosed. The polymerizable liquid may comprise: (a) a blocked or reactively blocked polyurethane prepolymer; (b) (optional) a reactive diluent; (c) a blocked or reactively blocked curing agent; (d) a photoinitiator; and (e) (optional) a blocked or reactively blocked diisocyanate. The method using such polymerizable liquid to form three-dimensional objects is also described.

A method and device of polymerization to form 3D objects is provided. The method and device incorporate an inert immiscible liquid between a liquid monomer and a light source such that the liquid monomer is polymerized when exposed to polymerization light from the light source at a liquid monomer-inert immiscible liquid interface. The liquid monomer is polymerized into a solid polymer that forms the 3D object.

Described herein are additives for three-dimensional build materials or inks, which in some embodiments can impart one or more structural enhancements to an article printed from the build material. In one aspect, a polymerizable liquid comprises at least one additive comprising a plurality of ring-polymerizable functional groups separated by an aliphatic linker or an alkanol ether linker.

Polymerizable liquids are described herein which, in some embodiments, can produce 3D printed articles of high resolution and desirable mechanical properties. In one aspect, a polymerizable liquid comprises an acrylate component, a polymeric additive, and a monomeric curing agent, wherein the acrylate component and monomeric curing agent are copolymerizable upon exposure to light. In being copolymerizable, the acrylate component and monomeric curing agent can form a copolymer. As described father herein, the monomeric curing agent can enable further reaction of the copolymer with one or more crosslinking species to link the copolymer with one more polymeric networks.