TH14359B - Highly absorbable polymers - Google Patents

Abstract

A highly absorbent polymer consisting of crosslinked polymer particles that Prefer insoluble water containing carboxyl group or carboxylate It is unique in that the hydrophilic cross-linked polymer particles The adsorption capacity of such water meets the following requirements (i) to (iii), which is due to an increase in the adsorption density. Such hydrophobic crosslinked polymer particles surface crosslinked. (I) Absorption of medically used saline until equilibrium inflation of 40 g / g (polymer) or more ( ii) Absorb 3 ml or more of medically used saline. Than when determined by inflating 0.3 g of polymers with medically administered saline for 10 s; And (iii) the time it takes to pass 5 ml of medical saline through a chest (inner diameter 10 mm) with a cross-sectional area of 0.785 cm 2 is 40 s or less. After containing 0.05 grams of polymer with water The medical salt is put in the barrel and inflated with the medical saline solution. The doctor has reached the point of absorbing the medically used saline solution until it is puffed up, balanced and lying in an dilated state:

Claims (3)

1. A highly absorbent polymer composed of hydrophobic crosslinked polymer particles. Insoluble type with carboxyl group or carboxylate It is characteristic that such hydrophobic cross-linked polymer particles The adsorption capacity meets the requirements of clause (i) to (iii) of the following. In such adsorption is due to the increase in the crosslinked density of the particle surface. Such hydrophobic cross-linked polymers; (i) Absorption of medically used saline until a balanced puff of 40 g / g (polymer) or more; (ii) Absorb 3 ml or more of medically used saline when determined by Inflate 0.3 g of polymer with medically used saline for 10; s; (iii) The time it takes to pass 5 ml of medically administered saline through a cylinder (inner diameter of 10 mm) with a cross-sectional area of 0.785 cm 2 is 40 s or less. Than with 0.05 g of polymers which has absorbed the medically saline solution until the balance of inflation was maintained. In the lying state in the cylinder, and (iv) The amount of polymers dissolution in 5% medical saline by weight or less (compared to that polymer). 2.Highly absorbable polymers composed of hydrophobic crosslinked polymer particles. Insoluble type with carboxyl group or carboxylate It is characteristic that such hydrophobic cross-linked polymer particles The adsorption capacity satisfies the following requirements (i) to (iii), where such adsorption capacity is due to an increase in the crosslinking density of the particle surface. Such hydrophobic cross-linked polymers: (i) equilibrium absorption of medically used saline to inflate equal to 40 g / g (polymers) or more; (ii) Absorb 6 ml or more of medically used saline when determined by Inflate 0.3 g of polymers with medically administered saline for 30 s: (iii) Time it takes to pass 50 mL of medically administered saline through a cylinder (25.6 mm in diameter) with a cross-sectional area of 5.15. Cm 2 is equal to 75 seconds or less later. It contains 0.5 g of polymer combined with a medical saline solution. Into the barrel and inflate with Medical saline to the point of absorbing the medical saline solution until it swells in a balance and And (iv) the amount of polymer solubility in clinically administered saline 5% by weight or less. (In comparison with that polymer) 3. The highly absorbable polymer according to claim 2, which is characterized by the adsorption of saline used. Medically, as mentioned in section (ii) above of Clause 2, is 9 mm or more.