Thickening of low molecular weight siloxanes with acrylate/metha

Details Thickening of low molecular weight siloxanes with acrylate/metha Thickening of low molecular weight siloxanes with acrylate/metha

1998-02-06

1999-10-19

Moore, Margaret G.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524862, 524588, 524268, 528 15, 528 26, 528 25, 424401, 525479, C08G 7708

Patent

active

059690356

ABSTRACT:
Low molecular weight siloxane fluids are thickened by silicone elastomers. The silicone elastomers are made by crosslinking reactions of .tbd.Si--H containing siloxanes and an unsaturated hydrocarbon such as an alpha, omega-diene, in the presence of a low molecular weight siloxane fluid. The .tbd.SiH siloxane is first partially reacted with either a monoacrylate functionalized polyether or a monomethacrylate functionalized polyether. It is then crosslinked by the alpha, omega-diene in the presence of the low molecular weight siloxane fluid. An elastomer, i.e. gel, with polyether groups is produced. The elastomer gel can be swollen with the low molecular weight siloxane fluid under shear force to provide a uniform silicone paste. The silicone paste has excellent spreadability upon rubbing, and possesses unique Theological properties in being thixotropic and shear thinning. The silicone paste can be easily emulsified with water to form a stable uniform emulsion without using a surfactant to allow normally immiscible materials to become intimately mixed.

REFERENCES:
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patent: 5412004 (1995-05-01), Tachibana
patent: 5654362 (1997-08-01), Schulz
patent: 5811487 (1998-09-01), Schulz, Jr. et al.

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