11 results about "Cyclohexane diisocyanate" patented technology

The invention relates to the technical field of adhesives, in particular to a bio-based adhesive and a preparation method thereof. The bio-based adhesive is prepared from the following raw material components: bio-based polyol, bio-based isocyanate and cyclohexane diisocyanate, a tin catalyst, a chain extender and an organic solvent are not contained; the invention also provides a preparation method of the bio-based adhesive, the bio-based adhesive prepared by the invention has good biodegradability, thermoplasticity and biocompatibility, can realize biodegradation under various environmental conditions, reduces pollution to the environment, and is more environment-friendly in treatment after being discarded compared with traditional petroleum-based polyurethane.

A solvent-free polyurethane coating capable of forming a heat-sealable release layer after coating and curing, comprising component A and component B; component A is made of the following raw materials in a weight ratio: 10-20% isophorone diisocyanate, 20-50% hexamethylene diisocyanate, 0-50% 1,4-cyclohexane diisocyanate, 0-40% cyclohexane dimethylene diisocyanate, and 0-30% norbornane diisocyanate; component B is made of the following raw materials in a weight ratio: 30-60% dimer acid polyester diol, 15-30% polyetheramine, 15-30% polyaspartic acid ester, 1-5% dihydroxy polydimethylsiloxane, and 1-5% silane coupling agent; the ratio of component A to component B is determined based on an R value of 1.02-1.10. The present invention also provides a preparation method for the solvent-free polyurethane coating capable of forming a heat-sealable release layer after coating and curing. The solvent-free polyurethane coating of the present invention can form a heat-sealable release layer with heat-sealability and easy peelability after coating and curing, and has no VOCs emission during the manufacturing and use process, which is more environmentally friendly.

The application discloses a kind of high hardness, high weather-resistant TPU material and preparation method thereof, the TPU material includes by weight fraction: 30~60 parts cyclohexane polyol, 30~60 parts cyclohexane diisocyanate, 0.3~2 parts antioxidant, 0.05~1 parts lubricant, 0.05~0.5 parts wax powder, 0.01~0.5 parts catalyst.The application adopts double symmetry cyclohexane aliphatic ring structure, molecular chain arrangement is neat, phase region size is less than visible light wavelength, with high hardness, high transmittance and low haze;Pure aliphatic ring structure eliminates yellowing from the source, and has excellent weather resistance and aging resistance;Double cyclohexane skeleton forms steric barrier, has outstanding hydrolysis resistance, acid and alkali resistance, fuel resistance, while high temperature mechanical retention rate, creep resistance and dimensional stability are excellent, and can be widely used in diesel filter oil cup, high temperature sealing element, outdoor transparent structural member and other high-end scenes.

The invention discloses a high-performance foaming material containing a thermoplastic polyurethane base material as well as a preparation method and application of the high-performance foaming material. The CHDI-based thermoplastic polyurethane in the foam material is obtained by reacting at least a component a and a component b or reacting the component a, the component b and a component c, and the component a is polyisocyanate containing 1, 4-cyclohexane diisocyanate; the component b is a polyol polymer; and the component c is a chain extender. The foaming material prepared from the thermoplastic polyurethane base material containing 1, 4-cyclohexane diisocyanate and the foaming product of the foaming material have good mechanical strength, higher elongation at break, higher toughness and high rebound resilience.

The invention belongs to the technical field of polyurethane adhesives, and discloses a two-component polyurethane adhesive and a preparation method thereof. The bi-component polyurethane adhesive comprises a component A and a component B. The component A comprises first bio-based modified polyol, second bio-based modified polyol, polyether polyol, polyester polyol, a chain extender and a catalyst. The component B is prepared from cyclohexane dimethylene diisocyanate, urethane modified diphenylmethane diisocyanate, nano calcium carbonate and silica powder. The double-component polyurethane adhesive provided by the invention not only has low TVOC (Total Volatile Organic Compound), but also has good tensile shear strength, tensile strength and elongation at break, and can meet the requirements of viscosity performance, anti-aging performance and construction performance at the same time. The bi-component polyurethane adhesive has the advantages of no toxicity, no pollution and strong adaptability; and the preparation method is simple and easy to operate.

The invention discloses a quick-drying high-hardness coating composition based on a cyclohexane diisocyanate tripolymer, which comprises a coating part and a curing agent part, and the curing agent part comprises the cyclohexane diisocyanate tripolymer. The six-membered ring structure of the cyclohexane diisocyanate tripolymer has high symmetry and low polarity, the rigidity of a molecular chain is enhanced, the random entanglement of the molecular chain is reduced, the spatial arrangement of an active group-NCO is more ordered, higher molecular movement capability can be maintained, and effective collision of reactive groups is promoted, so that rapid curing is realized. The hexamethylene diisocyanate trimer six-membered ring structure reduces molecular chain entanglement, promotes three-dimensional network formation, and improves the crosslinking density, thereby improving the hardness of the coating.

The invention discloses a solvent-free polyurethane coating capable of forming a heat-sealable release layer after coating and curing. The solvent-free polyurethane coating comprises a component A and a component B, the component A is prepared from the following raw materials in percentage by weight: 10 to 20 percent of isophorone diisocyanate, 20 to 50 percent of hexamethylene diisocyanate, 0 to 50 percent of 1, 4-cyclohexane diisocyanate, 0 to 40 percent of cyclohexane dimethylene diisocyanate and 0 to 30 percent of norbornane diisocyanate; the component B is prepared from the following raw materials in percentage by weight: 30 to 60 percent of dimer acid polyester glycol, 15 to 30 percent of polyether amine, 15 to 30 percent of polyaspartic acid ester, 1 to 5 percent of dihydroxy polydimethylsiloxane and 1 to 5 percent of silane coupling agent; the ratio of the component A to the component B is determined according to an R value of 1.02-1.10. The invention also provides a preparation method of the solvent-free polyurethane coating capable of forming a heat-sealable release layer after coating and curing. After the solvent-free polyurethane coating is coated and cured, a heat-sealable release layer which has heat sealability and is easy to peel off can be formed, VOCs are not discharged in the manufacturing and using processes, and the solvent-free polyurethane coating is more environmentally friendly.

The application discloses a method for preparing continuous and uniform liquid crystal elastomer melt-spun fibers on a large scale. The liquid crystal elastomer is prepared from a diacrylate reaction intermediate (RM82), 2,2'-(ethylenedioxy) dialkyl mercaptan (EDDT), toluene, dipropylamine (DPA), dibutyl tin dilaurate (DBTDL), butylated hydroxytoluene (BHT) and poly(cyclohexane diisocyanate) (Tris-Iso) as raw materials, and then melt spinning is performed. The method can prepare continuous and uniform liquid crystal elastomer melt-spun fibers on a large scale. The liquid crystal elastomer melt-spun fibers obtained by the method have good resilience, and the maximum elongation deformation under the action of external force can reach 3 times. After being placed in an oven at 85 DEG C for a certain period of time, it is found that the liquid crystal elastomer melt-spun fibers have certain flexibility, better resilience, good retraction performance and the maximum retraction speed is 1.33 cm / s.

The invention discloses a CHDI type polyurethane film for laminated glass as well as a preparation method and application of the CHDI type polyurethane film. The CHDI type polyurethane film is prepared from 1, 4-cyclohexane diisocyanate, polycaprolactone polyol, an aliphatic dihydric alcohol chain extender, a catalyst and a silane coupling agent, and the content of a cis-isomer in the 1, 4-cyclohexane diisocyanate is 30%-80%. The adhesive is simple in production process, high in transparency and excellent in mechanical property, and has good adhesion to inorganic glass and PC plastic plates.

The present invention provides a resin composition for a protective layer of an electromagnetic wave shielding film, the resin composition having a long pot life and being capable of forming a white protective layer that is not easily discolored even when heated. The resin composition of the present invention is a resin composition for a protective layer of an electromagnetic wave shielding film, wherein the resin composition contains an amorphous polyester resin, a curing agent, and a white pigment, the amorphous polyester resin has a number average molecular weight Mn of less than 20000 and a glass transition temperature Tg of 40° C. or higher, and the curing agent is at least one selected from the group consisting of a blocked isocyanate, an adduct of trimethylolpropane with hexane diisocyanate, and an adduct of isocyanurate with cyclohexane diisocyanate.

The invention belongs to the field of polyurethane prepolymers, provides a preparation method of a p-phenylene diisocyanate-based prepolymer easy to store stably, and aims to overcome the defects that existing p-phenylene diisocyanate monomers are high in activity and easy to self-polymerize and sublimate, and synthesized prepolymers are poor in stability. According to the present invention, the 1, 4-cyclohexane diisocyanate monomer is adopted, and the characteristics of good stability, low reaction activity, similar structure with p-phenylene diisocyanate and the like of the 1, 4-cyclohexane diisocyanate are utilized, such that the stability of the prepolymer is ensured while the subsequent use performance is not affected;