3 results about "Polymer morphology" patented technology

5 to 35% by weight of a structural monomer unit of a (meth)acrylic acid monomer, 35 to 65% by weight of a structural monomer unit of a C 1-8 alkyl (meth)acrylate monomer, and more than 10 to 30% by weight of a structure (II): [Chemical Formula 1] JPEG2026521909000033.jpg28170 (wherein R 1 is selected from linear saturated C 12-26 alkyl groups, R 2 is selected from hydrogen and methyl groups, and n is 10 to 30) of a structural monomer unit of a special associative monomer, 0.01 to 2% by weight of a structural unit of a polyvalent ethylenically unsaturated monomer, and [[ID=1~5]] a gradient polymer containing <0.05% by weight of a structural monomer unit of a sulfonated monomer and <0.02% by weight of a structure (II):[[ID=[]] 【化2】 [[ID=[]]JPEG2026521909000034.jpg36170 (wherein each R 3 is selected from -H and -CH3, R 4 / / 这里的“R 4 は、-H及び-C 1-4 アルキル基から選択され”,推测原文可能有误,这里按推测修正为“is selected from -H and -C<000000]]alkyl groups”is selected from -H and -C 1-4 alkyl groups, R 5 is selected from -C 1-4 alkyl groups, a is 0 to 50, b is 0 to 20, c is 0 to 50, a + c is 1 to 100, and d is 1 to 4) of a monomer having a structural unit, and a gradient polymer having a gradient polymer form is provided.

This invention discloses a method for crushing and purifying polyetheretherketone (PEEK), PEEK materials, and their applications. Belonging to the field of polymer composite materials technology, the method employs a process control approach using the polymerization mother liquor to regulate the polymer morphology in the polymerization solution, causing PEEK to precipitate in the form of spherical particles with a microspherical structure. Simple crushing yields low-particle-size ultrafine PEEK powder, with a particle size adjustable within the range of 8-100 micrometers and a high spheroidization rate. Simultaneously, the crushed low-particle-size ultrafine PEEK powder facilitates the purification of PEEK. Washing with organic solvents such as ethanol and acetone, and distilled water, PEEK powder can be obtained with high efficiency and cost-effectiveness. Due to the small particle size of PEEK, it is easy to purify. After simple purification, the cytotoxicity and hemolysis rate meet the standards for implantable medical-grade PEEK materials for human implantation, reducing the raw material costs of medical product manufacturing and enabling the general public to use more affordable and high-quality medical products.

An aqueous personal care rinse-off formulation comprising a dermatologically acceptable vehicle, a dermatologically acceptable cleansing surfactant, and a gradient polymer comprising 5 to 35% by weight of structural units of (meth)acrylic acid, 35 to 65% by weight of structural units of C 1~8 alkyl (meth)acrylate, and > 10 to 30% by weight of a special associative monomer having structural unit I of the structure: [Chemical Formula 1] JPEG2026521927000038.jpg29170 wherein R 1 is a linear saturated C 12~26 alkyl group, wherein R 2 is hydrogen or a methyl group, and n is from 10 to 30, and a special associative monomer, and 0.01 to 2% by weight of a polyethylenically unsaturated monomer of the structural unit, and a gradient polymer, the gradient polymer comprising < 0.05% by weight of a sulfonated monomer of the structural unit, and the polymer comprising < 0.02% by weight of a monomer of the structural unit having structure II [Chemical Formula 2] JPEG2026521927000039.jpg38170 wherein R 3 is H or -CH3, R 4 is -H or -C 1~4 alkyl group, R 5 is -C 1~4 alkyl group, a is from 0 to 50, b is from 0 to 20, c is from 0 to 50, a + c is from 1 to 100, d is from 1 to 4, and the gradient polymer has a gradient polymer form, and an aqueous personal care rinse-off formulation is provided.