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US 9,868,814 B2Granted
Branched low profile additives and methods of production
AssigneeAshland Licensing and Intellectual Property LLC
InventorsHusam A. A. Rasoul, Dejan D. Andjelkovic, Dennis H. Fisher
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Abstract
The invention pertains to low profile additives (“LPA”) comprising branched polymers having a weight average molecular weight (Mw) of at least about 20,000 grams/mole and a number average molecular weight (Mn) of at least about 3,000 grams/mole and methods for making the LPAs. The invention further concerns compositions comprising LPAs synthesized from one or more difunctional monomers and one or more branching agents. Also, disclosed are thermosettable resinous compositions and molded articles comprising the LPAs.
Claims18
A composition comprising:
- a) a resin selected from the group consisting of an unsaturated polyester resin, a vinyl ester resin, and mixtures thereof;
- b) one or more unsaturated monomers copolymerizable with the resin;
- and
- c) a low profile additive consisting of a branched polyester resin comprising the reaction product of i) one or more epoxide branching agents selected from the group consisting of a polyepoxide, an epoxidized vegetable oil, and combinations thereof, ii) one or more diols selected from the group consisting of HO—(CH2)n—OH wherein n is 2 to 10, a cyclic diol, a bicyclic diol, 1,2-propylene glycol, 2-methyl 1,3-propanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, and combinations thereof, iii) one or more diacids or anhydrides thereof;
- wherein:
- at least one of the epoxide branching agents comprises three or more epoxide function groups;
- and
- the low profile additive comprises about 0.1 mole % to about 10 mole % of the epoxide branching agent.
5 more elements
Dependencies are inferred from the claim text.