Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ethylenically unsaturated reactant admixed with either...
Patent
1984-05-23
1985-09-10
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ethylenically unsaturated reactant admixed with either...
525 44, 528303, 528304, 528306, C08G 6352
Patent
active
045407410
ABSTRACT:
New unsaturated polyester resin alkyds are disclosed which have an acid number in the 30 to 60 range, viscous behavior at room temperature, a viscosity not exceeding 300,000 cps at 45.degree. C. and a viscosity not exceeding 500 cps at 25.degree. C. when diluted with styrene up to a content of 31% by weight referred to the total of alkyd plus styrene. The alkyds are obtained by reacting together compounds selected from classes including: (A) acids and unsaturated anhydrides in amounts ranging from 0.4 to 1.0 moles; (B) other dicarboxylic acids; (C) one or more polymeric glycols comprising molecules which contain more than 90% by weight of 1,2-propyleneoxide units at a rate of at least 50%, preferably 60%, moles out of the total of (C)+(D) glycols; and (D) other glycols at a rate of no more than 50% moles out of the total of C+D glycols, there being at all times present at least one component selected from class (A) and at least one component selected from class (C). The invention is also concerned with unsaturated polyester resin compositions incorporating said alkyd and at least one cross-linking monomer selected from vinyl and allyl monomers in amounts no smaller than 10% by weight of the total weight.
REFERENCES:
patent: 2742445 (1956-04-01), Lum
patent: 2973332 (1961-02-01), Fikentscher et al.
patent: 3041305 (1962-06-01), Tessmar et al.
patent: 3560445 (1971-02-01), Fekete et al.
patent: 3894115 (1975-07-01), Bacskai et al.
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