40results about How to "Improve sticky effect" patented technology

The invention relates to composition, a preparation method and application of a solid cleaning adhesive. The solid cleaning adhesive comprises a hard monomer, a soft monomer, an organic solvent, an initiator, other functional aids and the like, and is prepared through polymerization and a series of posttreatment. The prepared solid cleaning adhesive is a solid cleaning product with certain adhesion, remove solid microparticles, dust and metallic pollution on surfaces and in gaps of chips and devices through the adhesion and high deformability of the surface of the material, ensures no residue or secondary pollution, cannot scratch or damage the chips and the devices, is harmless to a human body, and can be widely applied to semiconductors, microelectronic devices, printed circuit boards, television picture tubes, precision instruments, liquid crystal displays, computer keyboards, equipment in automobiles, mobile phones, audio / video equipment and the like.

The invention discloses a pressure bearable plugging agent for a marine drilling fluid and an application method therefor. The pressure bearable plugging agent consists of the following components in parts by weight: 10-20 parts of bauxite powder,10-20 parts of sodium soil, 20-35 parts of coal ash, 20-25 parts of wood fiber powder, 10-15 parts of composite salt-resistant polymer, 10-25 parts of furfural residue powder, and 0.5-1 parts of a crosslinking agent. When in use, 15-25 kg per cubic meter of a pressure bearable plugging agent is added to well drilling mud, then a drilling operation is performed; the pressure bearable plugging agent can greatly improve permeability resistance performance of drilling fluid, so that the drilling fluid and filtrate fluid of the drilling fluid are stooped from infiltrating into a deep portion of an oil-gas layer, thereby realizing near zero fluid loss drilling, and thus basically solving a pollution problem caused by the oil-gas layer in drilling engineering. Meanwhile, as the membrane structure is formed on a shallow surface of a permeable layer, and does not permeate the deep portion of the oil-gas layer; when there is a counter pressure in a wellbore, the plugging agent can be removed by itself; and a recovery value of permeability may be above 90%, thereby effectively protecting an oil-gas layer.

The invention discloses a macromolecular composite cushion layer and a preparation method of the macromolecular composite cushion layer, the macromolecular composite cushion layer comprises a PP (polypropylene) non-woven fabrics layer (1), a coating layer (2) mixed by PP materials and PE (polyethylene) materials, and a PP woven cloth layer which are compounded in sequence, wherein an anti-skidding layer (4) is arranged on the PP woven cloth layer by the hot spray oil method. According to the macromolecular composite cushion layer, the composite cushion layer can have enough friction by a more environment-friendly method, the contractibility rate of the composite cushion layer is reduced, and the function is more stable.

The invention relates to cross-linked starch for drilling fluid and a preparation method thereof. The cross-linked starch for the drilling fluid is prepared through steps as follows: starch and organic phosphonate are esterified in an organic solvent under the presence of a buffer solution, then act with sodium chloroacetate under an alkaline condition and have a cross-linking reaction under the action of an initiating agent and a crosslinking agent, wherein with the weight of raw material starch as a reference, the weight fraction of other raw materials is as follows: organic phosphonate accounts for 5-10%, the organic solvent accounts for 30-40%, sodium chloroacetate accounts for 5-15%, the initiating agent accounts for 0.05-1%, the crosslinking agent accounts for 0.05-0.1% and a basifier accounts for 5-15%. The cross-linked starch for the drilling fluid has the advantages of good filtrate loss reduction, adhesion improvement, temperature resistance, salt resistance and the like and is high in stability.

The invention relates to the technical field of primary processing of natural rubber, and discloses a preparation method of oxidized constant-viscosity natural rubber. Dissolve the oxidized constant viscosity agent in water to prepare a certain concentration of constant viscosity agent solution, add the prepared constant viscosity agent solution to the fresh latex, stir while adding, wait for the latex to solidify and mature for a certain period of time before dehydration, washing, Drying made permanent sticky natural rubber. Adding 200ppm to 400ppm constant viscosity agent to 1000g latex, the storage hardening value of the plastic initial value of the prepared natural rubber during accelerated storage is less than 2, and the storage hardening value of the Mooney viscosity is less than 4. The oxidation constant viscosity agent adopted in the method is safe and non-toxic, the preparation process of the constant viscosity natural rubber is simple, the constant viscosity effect is good, and the production cost is low.