Composite Plastic Molded Product Using Hydrogenated Rosin Ester
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Solution Overview
Problem
Existing composite plastic molded products face issues with phthalate plasticizer bleedout, which is harmful to health and the environment, and lack sufficient moldability and flexibility, especially when using styrene resin or experiencing coloring during molding.
Innovation Solution
A composite plastic molded product incorporating engineering plastics like polycarbonate, polyamide, or polyester with rosin ester, specifically formulated with dihydroabietic acid ester, tetrahydroabietic acid ester, or dehydroabietic acid ester, which provides excellent compatibility, bleedout resistance, and moldability without coloring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If phthalate plasticizer is added to enable easy processing and flexibility, then moldability and flexibility are improved, but bleedout occurs and harmful influence on health and environment increases
Solution Approach 1:
The patent changes the chemical parameters of the plasticizer by specifying precise compositional ratios (organosiloxane 5-20 parts, rosins 3-10 parts, polyhydric alcohol 2-5 parts per 100 parts resin) to achieve both moldability and bleedout resistance. This quantitative parameter optimization resolves the contradiction between ease of operation and harmful factors.
Solution Approach 2:
The patent creates a composite plasticizer system combining multiple components (organosiloxane, rosins, polyhydric alcohol) rather than using a single phthalate plasticizer. This composite approach provides synergistic effects that simultaneously improve moldability while preventing bleedout and eliminating harmful influences.
2Ease of operation
If phthalate plasticizer is added to enable easy processing and flexibility, then moldability and flexibility are improved, but harmful influence on health and environment increases
Solution Approach 1:
The patent changes the chemical composition parameters by eliminating phthalate plasticizers and replacing them with a specific formulation of organosiloxane, rosins, and polyhydric alcohol. This parameter change maintains moldability while removing harmful substances that affect health and environment.
Solution Approach 2:
The patent converts the potential harm of plasticizer bleedout into a benefit by using organosiloxane and rosin components that not only prevent bleedout but also provide desirable processing characteristics. The formulation turns a problematic additive role into a beneficial functional system.
3Ease of operation
If styrene resin is used, then processing flexibility is improved, but bleedout suppression is insufficient
Solution Approach 1:
The patent introduces organosiloxane as an intermediary component that mediates between styrene resin and the plasticizer system. This intermediary improves compatibility and prevents bleedout while maintaining processing flexibility, resolving the contradiction between ease of operation and reliability.
4Reliability
If rosin is used as plasticizer, then bleedout resistance is improved, but coloring occurs at the time of molding
Solution Approach 1:
The patent changes the chemical structure parameters of rosin by hydrogenating it to reduce aromatic content and conjugated double bonds. This parameter modification maintains bleedout resistance while eliminating coloring during molding, as the hydrogenated structure is more stable and less prone to oxidation-induced discoloration.
Data Source
AI summary
Provided is a composite plastic molded product, including: (A) engineering plastic; and (B) rosin ester being a reactant of rosins and C1-9 monohydric alcohol, in which a content of abietic acid-type resin acid and ester thereof having a conjugated double bond without an aromatic ring is less than 1 weight%, and in which a glass transition temperature is equal to or less than -15°C.