A graft polymer is provided, which includes a polymer backbone with a plurality of hydroxy groups, protection group modified histidine grafted onto the side of the polymer backbone, and hydrophilic polymer having terminal reactive group grafted onto the side of the polymer backbone. The graft polymer coating can be applied to metal material to form a composite material, which can be implanted into an organism to reduce adhesion problems.

In various aspects, top-down stereolithography apparatus and methods of use thereof are provided herein that allow for additive manufacturing of an article from a high-viscosity resin. The apparatus and methods can print resins having viscosities higher than conventional systems, e.g. viscosities up to about 100 Pa.Math.s at the elevated temperature. The resin may have a room temperature viscosity of about 100 Pa.Math.s, about 250 Pa.Math.s, about 1000 Pa.Math.s, or more. In some aspects, the resin is a solid at room temperature. The apparatus and methods do not rely upon solvents or other viscosity modifiers being added to the resin, and are capable of top-down additive manufacturing approaches which provide reduced stress on the printed article.

Polymer polyols are made in a seeded process, in which styrene and acrylonitrile are polymerized in the presence of a base polyol, a seed dispersion and a solvent. The seed dispersion contains an unsaturated macromer. The process produces a polymer polyol in which the dispersed phase particles have a particle size of 1 to 3 μm and a particle size span of less than 1.25. The polymer polyols are very useful for making flexible polyurethane foam for cushioning applications, in which high airflows and good load bearing are needed.

Polymer polyols are made in a seeded process, in which styrene and acrylonitrile are polymerized in the presence of a base polyol, a seed dispersion and a solvent. The seed dispersion contains an unsaturated macromer. The process produces a polymer polyol in which the dispersed phase particles have a particle size of 1 to 3 μm and a particle size span of less than 1.25. The polymer polyols are very useful for making flexible polyurethane foam for cushioning applications, in which high airflows and good load bearing are needed.

The present invention relates to a substrate, and a preparation method therefor and the use thereof. What is referred to as the substrate has a surface, the surface comprising a polymer coating covalently attached thereto. The polymer coating comprises a polymer comprising a repeating unit A as represented by formula I and a repeating unit B as represented by formula II or formula III:

##STR00001##

wherein X is selected from O or NH, R.sub.01, R.sub.01 and R.sub.01 or are each independently selected from H or a C1-C3 alkyl, R.sub.0 is selected from a C1-C10 alkyl or (C1-C5 alkyl)-NHNHS-PEG4, and R.sub.0 comprises at least one R.sub.02 substitution, at least one R.sub.02 substitution each independently selected from epoxy, amino, or azido, R.sub.03, R.sub.03, R.sub.03, R.sub.03, R.sub.04, R.sub.04, R.sub.04, R.sub.05, R.sub.05 and R.sub.05 are each independently selected from H, a C1-C3 alkyl, acylamino or ester group, L.sub.1 is selected from a C1-C3 alkylene or C(O)R.sub.06C(O), and R.sub.06 is selected from PEG or alkyldiamine. The surface can load biomolecules at a higher density, can meet the evolving developments in terms of biomolecular preparation and/or analysis requirements, and has a good stability.

Disclosed are a heavy oil activator, a preparation method and use thereof. The heavy oil activator has a structural formula shown in Formula (1). In Formula (1), x, y, z, m, and n are respectively mass fractions of corresponding chain segments in the polymer, m being 0.75-0.85, y being 0.20-0.24, and x, z, and n all being 0.001-0.01; and p is a natural number between 2 and 9. The activating polymer provided has the effects of increasing viscosity of an aqueous phase while reducing viscosity of crude oil, and can serve both as a displacing agent and a viscosity reducer to realize integration of the two agents. The activating polymer can increase viscosity of an aqueous phase, has a displacement effect, can emulsify and disperse crude oil, and increase fluidity of a mixed phase; the dispersed crude oil continues to interact with crude oil that has not contacted the polymer, and the aqueous phase interacts with the mixed oil phase as well as new oil, by way of which continuous interactions, more crude oil can be constantly produced. The activating polymer has a relatively low interfacial tension and exhibits a certain degree of oil washing capability.

The present invention relates to a textile care product containing a copolymer having N-isopropylacrylamide units, poly(ethylene glycol) methacrylate units and optionally at least one cross-linking agent. The copolymer is used as a soil-release active ingredient, reduces or prevents re-soiling and improves the removal of soiling.

A non-silicon defoaming agent, includes an acrylate polymer, an organic solvent carrier, hydrophobic particles and defoaming auxiliaries; and the acrylate polymer is prepared from following raw material components: monomer-1, monomer-2, unsaturated terminated polyether, alkene, diluent and initiator. The present invention further includes a preparing method for the non-silicon defoaming agent and the application of the non-silicon defoaming agent to the defoaming and foam inhibiting in systems rich in anionic surfactants. The defoaming agent takes the acrylate polymer as the main active substance and has excellent defoaming and foam inhibiting performance. By dropwise adding monomers, the defoaming performance of the acrylate polymer is improved, by using unsaturated terminated polyether to modify, the hydrophilia of the acrylate polymer is improved, the instant defoaming capacity is further improved, and by the alkene with the carbon atoms of 6-22 to modify, the foam inhibiting performance of the defoaming agent is improved.

Polymer polyols are made in a seeded process, in which styrene and acrylonitrile are polymerized in the presence of a base polyol, a seed dispersion and a solvent. The seed dispersion contains an unsaturated macromer. The process produces a polymer polyol in which the dispersed phase particles have a particle size of 1 to 3 m and a particle size span of less than 1.25. The polymer polyols are very useful for making flexible polyurethane foam for cushioning applications, in which high airflows and good load bearing are needed.

Polymer polyols are made in a seeded process, in which styrene and acrylonitrile are polymerized in the presence of a base polyol, a seed dispersion and a solvent. The seed dispersion contains an unsaturated macromer. The process produces a polymer polyol in which the dispersed phase particles have a particle size of 1 to 3 m and a particle size span of less than 1.25. The polymer polyols are very useful for making flexible polyurethane foam for cushioning applications, in which high airflows and good load bearing are needed.