Improve the service life of the silicone rubber mold of the silicone rubber self-adhesive tape
Use organic compounds containing suspicion groups or compounds containing aromatic rings as anti-burning agents to increase the service life of silicone rubber molds
method
Organic compounds containing dilute hydrocarbon groups include unsaturated ketones such as methyl vinyl ketone; unsaturated acid esters such as ethyl acrylate and diethyl fumarate; Saturated higher fatty acids; unsaturated higher fatty acid esters such as methyl linoleate and ethyl linoleate; linear olefins such as 1,4-hexadiene and their oligomers; 1,4-cyclohexadiene and other cyclic Hydrophobic hydrocarbons and their oligomers; citronellol, limonene, pinene, farnesol, carotene, vitamin A, squalene, etc. Compounds containing aromatic rings include triphenylmethane, diphenylmethane, cumin (Cumin, cumene), indene (indene), fluorene (fluorene), 1,2,3,4-tetrahydronaphthalene, 9,10_ Dihydroanthracene, etc. The addition amount is 100 parts of base polymer to 1~10 parts. The characteristic of this kind of anti-burning agent is that it will not affect the curing of unsaturated polyester on the contact surface of the model. It is also suitable for polyurethane resins and epoxy resins. Injection molding of resin and dicyclopentadiene resin.
[Example] In the two-component RTV silicone rubber (I), (II) and (DI) in 4. 4. 5. 3, add persons listed in Table 4-17, 4-18 and 4-19 respectively Anti-burning agent, make a silicone rubber model with a cavity diameter of 4 mm and a depth of 12 mm. After 72 hours of room temperature vulcanization, the injection molding durability of unsaturated polyester is evaluated according to the method in 4.4.5.4. The results are listed in Table 4-1 17, 4-18 and 4-19.
