Elastomer-forming compositions

Details Elastomer-forming compositions Elastomer-forming compositions

1996-09-27

1999-05-18

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

525477, 525478, C08G77/08

Patent

active

059051310

ABSTRACT:
Siloxane-based elastomer-forming compositions comprise a first a,w-dihydroxyl polydiorganosiloxane, a second a,w-dihydroxyl polydiorganosiloxane, a third a,w-dihydroxyl polydiorganosiloxane, an organosilicon compound having at least three silicon-bonded substituents selected from the group consisting of hydrogen and alkoxy groups, and a condensation catalyst. The number average molecular weight ratio of the first a,w-dihydroxyl polydiorganosiloxane to the second a,w-dihydroxyl polydiorganosiloxane is in the range of 20 to 80 and the number average molecular weight ratio of second a,w-dihydroxyl polydiorganosiloxane to the third a,w-dihydroxyl polydiorganosiloxane is in the range of 1 to 6. The molar ratio of the first a,w-dihydroxyl polydiorganosiloxane to the second a,w-dihydroxyl polydiorganosiloxane is in the range of 0.01 to 0.15 and the molar ratio of the second a,w-dihydroxyl polydiorganosiloxane to the third a,w-dihydroxyl polydiorganosiloxane is in the range of 0.2 to 2. These compositions are substantially solvent-free and result in elasomers having improved strength without fillers.

REFERENCES:
patent: 4780338 (1988-10-01), Saad et al.
patent: 5616673 (1997-04-01), Anderson et al.
Macromolecular Reports, A31 (Suppls. 1&2), 153-160 (1994) article entitled Elastomer Properties of Poly(Dimethylsiloxane) Networks Having Bimodal and Trimodal Distributions of Network.
Chain Lengths, Madkour and Mark Polymer Bulletin 31, 615-621 (1993) entitled Some Evidence on Pore Sizes in Poly(dimethylsiloxane) Elastomers Having Unimodal, Bimodal, or Trimodal Distributions of Network Chain Lengths, Madkour and Mark .

Affiliated with

Also associated with

Rating

Elastomer-forming compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elastomer-forming compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastomer-forming compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1760002