Catalyst compositions and their use in the preparation of releas

Details Catalyst compositions and their use in the preparation of releas Catalyst compositions and their use in the preparation of releas

1979-12-28

1981-07-28

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

260 332SB, 252429R, 252431R, 252431N, 252431P, 252431C, 427387, 528 31, 528 32, C08G 7706

Patent

active

042810930

ABSTRACT:
A catalyst composition comprising a solution of an organo-metallic complex of platinum or rhodium in a liquid allyl ether which has a b.p. of at least 150.degree. C. at 1 bar and which is free from groups having an adverse effect on the catalytic affect of the complex; polyorganosiloxane coating compositions containing a Si--H polysiloxane and a polysiloxane containing Si--OH, Si-vinyl or Si-allyl groups, an organo-metallic complex of platinum or rhodium and an allyl ether as defined above; and the use of the compositions for preparing release coatings on substrates.
In the coating of substrates, especially paper, with release coatings based on heat-curable polysiloxane compositions, organo-metallic complexes of platinum or rhodium can be used as catalysts provided they are dissolved in the composition. The low-boiling solvents hitherto used have disadvantages in causing atmospheric pollution and requiring solvent-recovery plant. The ethers defined can be used in place of the low-boiling solvents to give satisfactory coatings without the mentioned disadvantages.

REFERENCES:
patent: 3936581 (1976-02-01), Garden
patent: 3960810 (1976-06-01), Chandra et al.
patent: 4064154 (1977-12-01), Chandra et al.
patent: 4108833 (1978-08-01), Hatanaka et al.
patent: 4123604 (1978-10-01), Sandford, Jr.
patent: 4162356 (1979-07-01), Grenoble

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