Hydrophilic silicone composite and the method for producing ther

Details Hydrophilic silicone composite and the method for producing ther Hydrophilic silicone composite and the method for producing ther

1986-05-13

1987-09-29

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525100, 523105, 523113, C08L 8304

Patent

active

046969748

ABSTRACT:
Hydrophilic silicones composite contain 10 to 150 wt. parts of a powdered hydrogel filler with particle size 10.sup.-6 to 10.sup.-1 mm on 100 parts by weight of crosslinked silicone polymer which forms a continuous matrix of the composite. The used hydrogel filler is formed made of physically or chemically crosslinked polymers or copolymers of polyol or dihydroxyether monomethacrylates, amides of methacrylic or acrylic acid or their N-monosubstituted and N,N-disubstituted derivatives, or a multiblock copolymer of acrylonitrile with acrylamide and/or acrylic acid. The hydrogel filler is mixed into the non-crosslinked silicone rubber, which is, after shaping, crosslinked by the known procedure of silicone rubber vulcanization at temperatures ranging from 15.degree. to 200.degree. C. These composites are substantially stronger, more plastic, and absorb more water than expected. Tensile strength and shape memory are improved. The composites are useful as biomaterials.

REFERENCES:
patent: 3627836 (1968-11-01), Getson
patent: 4230826 (1980-10-01), Sommer et al.
patent: 4616064 (1986-10-01), Zukosky et al.

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